Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 20 de 201
Filter
1.
Braz. j. biol ; 83: e246451, 2023. graf
Article in English | MEDLINE, LILACS, VETINDEX | ID: biblio-1339402

ABSTRACT

Abstract Dipteryx alata Vogel is a tree species widely found in Cerrado, settling preferentially in well drained soils. Studies related to ecophysiology of D. alata may contribute to the decision making about using seedlings of this species in projects aimed at the recovery of degraded areas where seasonal flooding happens. This study aimed to assess the effects of flooding on photosynthetic and antioxidant metabolism and quality of D. alata seedlings cultivated or not under flooding during four assessment periods (0, 20, 40, and 60 days), followed by 100 days after the end of each assessment period (0+100, 20+100, 40+100, and 60+100 days), allowing verifying the potential for post-flooding recovery. Flooded plants showed lower photosynthetic efficiency than non-flooded plants, regardless of the periods of exposure. However, this efficiency was recovered in the post-flooding, with values similar to that of the non-flooded seedlings. Moreover, the damage to FV/FM was evidenced by an increase in the period of exposure to flooding, but recovery was also observed at this stage of the photosynthetic metabolism. Seedling quality decreased under flooding, not varying between periods of exposure, but remained lower although the increase observed in the post-flooding period, with no recovery after flooding. The occurrence of hypertrophied lenticels associated with physiological changes and an efficient antioxidant enzyme system might have contributed to the survival and recovery of these seedlings. Thus, this species is sensitive to flooding stress but capable of adjusting and recovering metabolic characteristics at 100 days after the suspension of the water stress, but with no recovery in seedling quality. Thus, we suggested plasticity under the cultivation condition and determined that the time of 100 days is not enough for the complete resumption of growth.


Resumo Dipteryx alata Vogel é uma arbórea de ampla ocorrência no Cerrado, se estabelecendo preferencialmente em solos bem drenados. Estudos referentes à ecofisiologia de D. alata em podem contribuir para a tomada de decisão sobre o uso de mudas dessa espécie em programas de recuperação de áreas degradadas sujeitas a alagamento temporário. Objetivamos com essa pesquisa avaliar os efeitos do alagamento no metabolismo fotossintético e antioxidante, além da qualidade de mudas dessa espécie, cultivadas ou não sob alagamento durante quatro períodos de avaliação (0, 20, 40 e 60 dias) seguidos de 100 dias após o término de cada período (0+100, 20+100, 40+100, 60+100 dias), possibilitando verificar o potencial de recuperação pós-alagamento. Observamos que as plantas alagadas apresentaram menor eficiência fotossintética e danos em FV/FM entretanto houve recuperação dessas características no pós alagamento. A qualidade das mudas reduziu sob alagamento não variando entre os períodos de exposição e embora tenha aumentado no pós-alagamento manteve-se menor não se recuperando. A ocorrência de lenticelas hipertrofiadas associadas a alterações fisiológicas e um eficiente sistema enzimático antioxidante devem ter contribuído para a sobrevivência e recuperação metabólica dessas mudas. Diante disso, sugerimos que a espécie é sensível ao estresse por alagamento, mas capaz de se ajustar e recuperar as características metabólicas 100 dias após a suspensão deste estresse hídrico, no entanto a qualidade da mudas não apresentou recuperação, assim, sugerimos plasticidade diante da condição de cultivo e ressaltamos que o tempo de 100 dias não é suficiente para a completa retomada do crescimento.


Subject(s)
Seedlings , Dipteryx , Photosynthesis , Floods , Antioxidants
2.
Braz. j. biol ; 82: e249971, 2022. tab
Article in English | MEDLINE, LILACS, VETINDEX | ID: biblio-1278485

ABSTRACT

Abstract Stunting is a significant public health problem in low- and middle-income countries. This study assessed the prevalence of stunting and associated risk factors of stunting among preschool and school-going children in flood-affected areas of Pakistan. A cross-sectional study was conducted by visiting 656 households through multi-stage sampling. Respondent's anthropometric measurements, socio-demographic information and sanitation facilities were explored. A logistic regression model was used to determine determinants of stunting, controlling for all possible confounders. The overall prevalence of stunting in children was 40.5%, among children 36.1% boys and 46.3% of girls were stunted. The prevalence of stunting in under-five children was 50.7%. Female children (OR=1.35, 95% CI:0.94-2.0), children aged 13-24 months (OR=6.5, 95% CI: 3.0-13.9), mothers aged 15-24 years (OR=4.4, 95% CI: 2.6-7.2), joint family (OR=2.1, 95% CI: 1.4-3.0) did not have access to improved drinking water (OR=3.3, 95% CI: 1.9-5.9), and the toilet facility (OR=2.8, 95% CI, 1.9-4.3), while the children from district Nowshera (OR=1.7, 95% CI: 0.9-3.2) were significantly (P<0.05) associated in univariate analysis. The regression model revealed that child age, maternal age, family type, quality of water, and toilet facility, were the significant (P<0.05) factors contributing to child stunting in the flood-hit areas. Identification of key factors might be helpful for policymakers in designing comprehensive community-based programs for the reduction of stunting in flood-affected areas. In disasters such as flood, the detrimental consequences of the stunting problem could be even more on children. Evidence-based education and care must be provided to the families in the flood-affected regions to reduce the stunting problem. The determinants of stunting should be targeted by making comprehensive policies regarding proper nutrition, livelihood, clean water, and sanitation facilities in flood-hit regions.


Resumo A baixa estatura é um problema significativo de saúde pública em países de baixa e média renda. Este estudo avaliou a prevalência de nanismo e os fatores de risco associados de nanismo entre crianças em idade pré-escolar e em idade escolar em áreas afetadas por inundações do Paquistão. Foi realizado um estudo transversal visitando 656 domicílios por meio de amostragem em múltiplos estágios. As medidas antropométricas do entrevistado, informações sociodemográficas e instalações de saneamento foram exploradas. Um modelo de regressão logística foi usado para determinar os determinantes do nanismo, controlando todos os possíveis fatores de confusão. A prevalência geral de baixa estatura em crianças foi de 40,5%, entre as crianças 36,1% dos meninos e 46,3% das meninas com baixa estatura. A prevalência de baixa estatura em crianças menores de 5 anos foi de 50,7%. Crianças do sexo feminino (OR = 1,35, IC de 95%: 0,94-2,0), crianças de 13-24 meses (OR = 6,5, IC de 95%: 3,0-13,9), mães de 15-24 anos (OR = 4,4, IC de 95%: 2,6-7,2), família conjunta (OR = 2,1, IC 95%: 1,4-3,0) não tiveram acesso a água potável de qualidade (OR = 3,3, IC 95%: 1,9-5,9) e a banheiro (OR = 2,8, IC de 95%, 1,9-4,3), enquanto as crianças do distrito de Nowshera (OR = 1,7, IC de 95%: 0,9-3,2) foram significativamente (P < 0,05) associadas na análise univariada. O modelo de regressão revelou que a idade da criança, idade materna, tipo de família, qualidade da água e banheiro foram os fatores significativos (P < 0,05) que contribuíram para a baixa estatura infantil nas áreas afetadas pelas enchentes. A identificação de fatores-chave pode ser útil para os formuladores de políticas no planejamento de programas comunitários abrangentes para a redução da baixa estatura em áreas afetadas pelas enchentes. Em desastres como enchentes, as consequências prejudiciais do problema de baixa estatura podem ser ainda maiores para as crianças. Educação baseada em evidências e cuidados deve ser fornecida às famílias nas regiões afetadas pelas enchentes para reduzir o problema de nanismo. Os determinantes do retardo de crescimento devem ser almejados pela formulação de políticas abrangentes sobre nutrição adequada, meios de subsistência, água potável e instalações de saneamento nas regiões afetadas pelas enchentes.


Subject(s)
Humans , Male , Female , Child, Preschool , Child , Floods , Growth Disorders/epidemiology , Pakistan/epidemiology , Schools , Prevalence , Cross-Sectional Studies , Risk Factors
3.
Braz. j. biol ; 82: e234018, 2022. tab, graf
Article in English | LILACS | ID: biblio-1249233

ABSTRACT

Abstract Root deformation (RD) caused by errors in the pricking out process are irreversible and very difficult to detect in container-grown seedlings at the time of planting in the field. The objective of this study was to evaluate the effects of RD on leaf gas exchange, growth, biomass allocation and mineral nutrition of G. americana seedlings during the recovery phase after soil flooding. Four-months-old seedlings, with and without RD, were flooded for 42 days and their recovery was evaluated 28 days after soil drainage. There were no significant interactions between RD and soil flooding for all leaf gas exchange, growth and mineral nutrition after soil drainage, with the exception of leaf P concentrations. In plants with no RD, the P concentration in leaves of non-flooded plants was significantly higher than that of plants with RD. Soil flooding and RD did not influence leaf or root N concentrations or whole-plant N content. RD increased the K concentration in the roots, but not in the leaves. Changes in the nutrient concentrations in leaves and roots indicate that RD may affect physiological performance of seedlings after planting in the field.


Resumo A deformação da raiz (RD) causada por erros no processo de repicagem é irreversível e difícil de detectar em mudas produzidas em embalagens no momento do plantio no campo. O objetivo deste estudo foi avaliar os efeitos do RD nas trocas gasosas foliares, crescimento, alocação de biomassa e nutrição mineral de mudas de G. americana na fase de recuperação após o alagamento do solo. Mudas com quatro meses de idade, com e sem RD, foram alagadas por 42 dias e a sua recuperação foi avaliada 28 dias após a drenagem do solo. Não houve interação significativa entre RD e alagamento do solo nas trocas gasosas foliares, crescimento e nutrição mineral após a drenagem, com exceção das concentrações de P foliar. Em plantas sem RD, a concentração de P nas folhas de plantas não alagadas foi significativamente maior que a das plantas com RD. O alagamento do solo e a RD não influenciaram as concentrações de N nas folhas e raízes, e no conteúdo de N na planta inteira. A RD aumentou a concentração de K nas raízes, mas não nas folhas. Alterações nas concentrações de nutrientes nas folhas e raízes indicam que a RD pode afetar o desempenho fisiológico das mudas após o plantio no campo.


Subject(s)
Soil , Seedlings , Plant Roots , Plant Leaves , Floods , Minerals
4.
Investig. psicol. (La Paz, En línea) ; 26: 11-26, dic. 2021. ilus., tab.
Article in Spanish | LILACS | ID: biblio-1348924

ABSTRACT

Los desastres naturales, aparte de las pérdidas económicas que generan, también pueden afectar el funcionamiento familiar y la satisfacción con la vida debido a los eventos adversos que se experimentan. Por ello, el principal objetivo de la investigación fue determinar la relación que existe entre la funcionalidad familiar y la satisfacción con la vida en la comunidad de San Antonio del Pedregal - Sector 1 en Lurigancho-Chosica, Perú; una de las zonas más afectadas por la presencia de huaicos (grandes aluviones frecuentes en las alturas andinas) desde la década de 1980 y que recientemente ha experimentado los efectos adversos del fenómeno del Niño de 2017. La investigación se desarrolló bajo el enfoque cuantitativo, con alcance correlacional y diseño no experimental de corte transversal; además, la muestra de estudio estuvo conformada por 180 personas. Los resultados indican que, a pesar de los eventos vividos, las personas muestran un moderado funcionamiento familiar y se encuentran satisfechas con sus vidas. Las mujeres presentaron mayor puntaje en ambas variables en comparación con los varones, los mayores de 60 años reportaron mayor funcionalidad familiar y los menores de 30 años mostraron mejores resultados en la satisfacción con la vida.(AU)


Natural disasters, apart from economic losses, can also affect family functioning and life satisfaction due to the adverse events that are experienced. Therefore, the main purpose of the research was to know the relation between the family functionality and satisfaction with life in the community of San Antonio del Pedregal - Sector 1 in Lurigancho-Chosica, Peru; one of the geographical areas most affected by the presence of huaicos (frequent large floods in the Andean highlands) since the 1980s and that has recently experienced the adverse effects of the El Niño phenomenon of 2017. The research was correlational and transversal; furthermore, the study sample consisted of 180 local people. The results indicate that, despite the events experienced, people show moderate family functioning and are satisfied with their life. Women had a higher score in both variables compared to men, those over 60 years of age reported greater family functionality, and those under 30 years of age showed better results in life satisfaction.(AU)


Os desastres naturais, além das perdas econômicas, também podem afetar o funcionamento da família e a satisfação com a vida devido aos eventos adversos vivenciados. Portanto, o objetivo principal da investigação foi conhecer a relação entre a funcionalidade da família e a satisfação com a vida na comunidade de San Antonio del Pedregal - Setor 1 em Lurigancho-Chosica, Peru; uma das áreas geográficas mais afetadas pela presença de huaicos (grandes inundações frequentes no planalto andino) desde a década de 1980 e que recentemente experimentou os efeitos adversos do fenômeno El Niño de 2017. A investigação foi correlacional e transversal; além disso, a amostra do estudo foi composta por 180 pessoas locais. Os resultados indicam que, apesar dos eventos vivenciados, as pessoas apresentam funcionamento familiar moderado e estão satisfeitas com a vida. As mulheres obtiveram pontuação mais elevada em ambas as variáveis em relação aos homens, as maiores de 60 anos relataram maior funcionalidade familiar e as menores de 30 anos apresentaram melhores resultados na satisfação com a vida.(AU)


Subject(s)
Humans , Male , Female , El Niño Phenomenon , Natural Disasters , Alluvium , Floods
5.
Ciênc. Saúde Colet ; 26(2): 721-728, fev. 2021. graf
Article in English, Portuguese | LILACS | ID: biblio-1153792

ABSTRACT

Resumo A relação entre os desastres de origem hidrometeorológicos e a saúde das populações atingidas ainda é pouco abordada no Rio Grande do Sul (RS), Brasil. A Hepatite A é uma doença que envolve questões sanitárias e do meio urbano, sendo uma doença do tipo evitável. Esse estudo tem como objetivo analisar a relação entre áreas de inundação e a ocorrência de doenças de veiculação hídrica, neste caso, a Hepatite A. Foi estruturado um banco de dados dos casos confirmados de Hepatite A e de eventos de inundações no município de Encantado-RS entre os anos de 2012 e 2014. Esses dados foram analisados espacialmente a partir do estimador Kernel dos pontos de ocorrência de casos de Hepatite A e correlacionados para o perímetro urbano. Verificou-se que nos três meses posteriores à ocorrência de inundação, foram registrados 44 casos, um aumento de quase 300%, no registro de casos de Hepatite A. Os resultados identificaram que todos os casos confirmados estão na área urbana localizada na planície de inundação. O que reafirma a importância de incentivo a formulação e implementação de políticas de prevenção a surtos de doenças pós-desastres hidrometeorológicos.


Abstract The relationship between hydrometeorological disasters and the health of affected populations is still hardly discussed in Rio Grande do Sul (RS), Brazil. Hepatitis A is a disease that involves health and urban environment issue and is an avoidable disease. This study aims to analyze the relationship between flood areas and waterborne diseases, in this case, Hepatitis A. A database of confirmed cases of Hepatitis A and flood events in the municipality of Encantado-RS, Brazil between 2012 and 2014 was structured. These data were analyzed spatially from the kernel estimator of the occurrence points of Hepatitis A cases and correlated to the urban perimeter. It was verified that 44 cases were registered in the three months following the occurrence of flood, an increase of almost 300% in the records of Hepatitis A. The results identified that all the confirmed cases are in the urban area located in the floodplain. This reaffirms the importance of encouraging the formulation and implementation of policies to prevent outbreaks of waterborne diseases post hydrometeorological disaster.


Subject(s)
Humans , Disasters , Hepatitis A/epidemiology , Brazil/epidemiology , Floods
6.
Article in English | WPRIM | ID: wpr-880367

ABSTRACT

BACKGROUND@#Understanding the association between floods and bacillary dysentery (BD) incidence is necessary for us to assess the health risk of extreme weather events. This study aims at exploring the association between floods and daily bacillary dysentery cases in main urban areas of Chongqing between 2005 and 2016 as well as evaluating the attributable risk from floods.@*METHODS@#The association between floods and daily bacillary dysentery cases was evaluated by using distributed lag non-linear model, controlling for meteorological factors, long-term trend, seasonality, and day of week. The fraction and number of bacillary dysentery cases attributable to floods was calculated. Subgroup analyses were conducted to explore the association across age, gender, and occupation.@*RESULTS@#After controlling the impact of temperature, precipitation, relative humidity, long-term trend, and seasonality, a significant lag effect of floods on bacillary dysentery cases was found at 0-day, 3-day, and 4-day lag, and the cumulative relative risk (CRR) over a 7-lag day period was 1.393 (95%CI 1.216-1.596). Male had higher risk than female. People under 5 years old and people aged 15-64 years old had significantly higher risk. Students, workers, and children had significantly higher risk. During the study period, based on 7-lag days, the attributable fraction of bacillary dysentery cases due to floods was 1.10% and the attributable number was 497 persons.@*CONCLUSIONS@#This study confirms that floods can increase the risk of bacillary dysentery incidence in main urban areas of Chongqing within an accurate time scale, the risk of bacillary dysentery caused by floods is still serious. The key population includes male, people under 5 years old, students, workers, and children. Considering the lag effect of floods on bacillary dysentery, the government and public health emergency departments should advance to the emergency health response in order to minimize the potential risk of floods on public.


Subject(s)
Adolescent , Adult , Aged , Aged, 80 and over , Child , Child, Preschool , China/epidemiology , Cities , Dysentery, Bacillary/epidemiology , Female , Floods , Humans , Incidence , Infant , Infant, Newborn , Male , Middle Aged , Retrospective Studies , Young Adult
7.
Article in English | WPRIM | ID: wpr-922207

ABSTRACT

BACKGROUND@#The July 2018 Japan Floods caused enormous damage to western Japan. Such disasters can especially impact elderly persons. Research has shown that natural disasters exacerbated a decline in cognitive function, but to date, there have been no studies examining the effects of this disaster on the elderly. The object of this study was to reveal the effect of this disaster in terms of cognitive decline among the elderly.@*METHODS@#Study participants were certified users of the long-term care insurance (LTCI) system in Hiroshima, Okayama, and Ehime prefectures from May 2018 to June 2018. The observation period was from July 2018 to December 2018. Our primary outcome was cognitive decline after the disaster using a dementia symptomatology assessment. In addition to a crude model, a multivariate Cox proportional hazards model was used to assess the cognitive decline of victims, adjusting for age classification, gender, the level of dementia scale before the disaster occurred, residential environment, whether a participant used facilities shut down after the disaster, and population density. After we confirmed that the interaction term between victims and residential environment was statistically significant, we stratified them for the analysis.@*RESULTS@#The total number of participants was 264,614. Victims accounted for 1.10% of the total participants (n = 2,908). For the Cox proportional hazards model, the hazard ratio of the victims was 1.18 (95% confidential interval (CI): 1.05-1.32) in the crude model and 1.12 (95% CI: 1.00-1.26) in the adjusted model. After being stratified by residential environment, the hazard ratio of home victims was 1.20 (95% CI: 1.06-1.36) and the hazard ratio of facility victims was 0.89 (95% CI: 0.67-1.17).@*CONCLUSIONS@#This study showed that elderly living at home during the 2018 Japan Floods were at risk for cognitive decline. Medical providers, care providers, and local governments should establish a system to check on the cognitive function of elderly victims and provide necessary care support.


Subject(s)
Aged , Cognitive Dysfunction/etiology , Floods , Humans , Insurance, Long-Term Care , Japan/epidemiology , Retrospective Studies
8.
Cad. Saúde Pública (Online) ; 37(5): e00100119, 2021. tab, graf
Article in Portuguese | LILACS | ID: biblio-1249439

ABSTRACT

A leptospirose se relaciona a problemas de saneamento ambiental, com incremento de casos em períodos de inundações. Levando-se em consideração as questões relacionadas a mudanças climáticas, as inundações tendem a um aumento. As inundações não atingem as populações de maneira homogênea, em geral os menos favorecidos em termos socioeconômicos são os mais acometidos. Para saber se o número de inundações aumentaria a incidência de leptospirose e sua relação com as variáveis contextuais, utilizou-se dados socioeconômicos, ambientais e de ocorrência da doença no nível municipal. Os municípios que tinham problemas no esgotamento sanitário apresentaram maior risco para a ocorrência da leptospirose. O total de inundações adquirida a partir da decretação pela autoridade municipal constituiu um importante marcador de risco para a ocorrência de leptospirose. A modelagem de árvore de regressão mostrou-se útil para estimar a ocorrência de leptospirose no Brasil.


Leptospirosis is related to problems with environmental sanitation, and the incidence tends to increase during flood periods. Considering issues related to climate change, floods can be expected to increase. Floods do not affect populations homogeneously, and communities with worse socioeconomic conditions tend to be impacted more heavily. In order to determine whether the number of floods increases the incidence of leptospirosis and its relationship to contextual variables, the study used socioeconomic, environmental, and disease occurrence data at the municipal (county) level. Municipalities suffering problems with sewage disposal showed a higher risk of leptospirosis incidence. Total flooding since the municipality's declaration of flood emergency was an important risk marker for leptospirosis incidence. Regression tree modeling proved useful for estimating leptospirosis incidence in Brazil.


La leptospirosis se relaciona con problemas de saneamiento ambiental, así como con el incremento de casos en períodos de inundaciones. Teniendo en consideración las cuestiones relacionadas con el cambio climático, las inundaciones tienden a aumentar. Las inundaciones no afectan a las poblaciones de manera homogénea, en general, los menos favorecidos en términos socioeconómicos son los más afectados. Para saber si el número de inundaciones aumentaría la incidencia de leptospirosis, y su relación con variables contextuales, se utilizaron datos socioeconómicos, ambientales y de ocurrencia de la enfermedad en el nivel municipal. Los municipios que poseían problemas en el alcantarillado sanitario presentaron un mayor riesgo para la ocurrencia de leptospirosis. El total de inundaciones sufridas a partir de su reconocimiento oficial por parte de la autoridad municipal constituyó un importante marcador de riesgo para la ocurrencia de leptospirosis. El modelo de árbol de regresión se mostró útil para estimar la ocurrencia de leptospirosis en Brasil.


Subject(s)
Humans , Floods , Leptospirosis/epidemiology , Brazil/epidemiology , Cities/epidemiology , Data Mining
9.
Braz. j. biol ; 79(4): 722-734, Nov. 2019. tab, graf
Article in English | LILACS | ID: biblio-1001488

ABSTRACT

Abstract Small hydroelectric power plants (SHP) have been considered as an alternative for the generation of electricity with reduced environmental impacts. Nevertheless, no studies have addressed changes in a particular kind of river macrohabitat commonly affected by SHPs, the knickzones. This study aimed to assess the impact of a SHP construction on the aquatic macroinvertebrate fauna associated with two basaltic knickzones located in Sapucaí-Mirim River, Southeast Brazil. The first, considered as a functional knickzone, follows the natural dynamics of the river flow and preserves the original rock substrate. The second, considered as non-functional knickzone, was permanently flooded after the SHP construction and the consolidated rock substrate was changed by fine sediment. Sampling was carried out in two seasonal periods and the data were analysed through multivariate analysis. It was observed differences in composition and structure of the macroinvertebrates community between the knickzones and periods. The functional knickzone exhibited a much higher richness, 72 taxa compared to 44 in the non-functional, as well as a large number of exclusive taxa (38, being only nine exclusive to the non-functional). Diversity, equitability and density mean values were also higher in the functional knickzone. The limnological parameters varied significantly between dry and rainy seasons but not between the distinct knickzones. This kind of macrohabitats and its potential role for the rivers biodiversity is practically unknown. In the scenery of fast SHP expansion, further studies and protection measures are necessary.


Resumo Atualmente, a instalação de pequenas centrais hidrelétricas (PCHs) tem sido a alternativa mais visada quando a questão é suprir a demanda energética, considerando-se os menores impactos ambientais possíveis. Contudo, são escassos os trabalhos que avaliam as alterações causadas por esses empreendimentos, principalmente no que se diz respeito a um tipo de macro-habitat de rios, os pedrais. Assim, este estudo teve como objetivo avaliar o impacto da construção de uma PCH na fauna de macroinvertebrados aquáticos associada a dois pedrais basálticos, localizados no rio Sapucaí-Mirim, no Sudeste do Brasil. O primeiro, considerado como um pedral funcional, segue a dinâmica natural do fluxo do rio e possui o substrato rochoso original. O segundo, considerado como pedral não funcional, foi permanentemente inundado após a construção da PCH e o substrato consolidado foi alterado por sedimentos finos. A amostragem foi realizada em dois períodos sazonais e os dados foram analisados através de análise multivariada. Foram observadas diferenças na composição e estrutura da comunidade de macroinvertebrados entre os pedrais e períodos. O pedral funcional apresentou uma riqueza muito maior, 72 táxons em comparação com 44 no não funcional, bem como um grande número de táxons exclusivos (38, sendo apenas nove exclusivos do não-funcional). Os valores médios da diversidade, equitabilidade e densidade também foram maiores no pedral funcional. Os parâmetros limnológicos variaram significativamente entre as estações seca e chuvosa, mas não entre os diferentes pedrais. Este tipo de macro-habitat e seu potencial papel para a biodiversidade dos rios são praticamente desconhecidos. Assim, mais estudos e medidas de proteção são necessários, principalmente diante do atual cenário de rápida expansão das PCHs.


Subject(s)
Animals , Power Plants , Biota/physiology , Rain , Seasons , Brazil/epidemiology , Limnology/methods , Environmental Monitoring/methods , Rivers , Floods , Ecological Parameter Monitoring/methods , Invertebrates/classification , Invertebrates/physiology
10.
Braz. j. biol ; 79(3): 470-487, July-Sept. 2019. tab, graf
Article in English | LILACS | ID: biblio-1001445

ABSTRACT

Abstract In Brazil, given its privileged hydrology, the unexplored economic use of water resources has many dimensions, such as hydroelectric power. This energy will face increasingly rigorous social and environmental impact assessments (40% of potential is located in the Amazon region). Hydropower inventory studies conducted over decades, with solutions such as ecological river flows, that flood smaller areas and reduce natural river flows modifications, are being reviewed. The river extension from dam to the point where the waters are returned after the powerhouse is known as the Reduced Flow Stretch (RFS). Even mega-projects, such as the 11.3 GW Belo Monte dam, are designed with deviating flows reaching an astounding 13,000 m 3/s (excavated material higher than Panama Canal). RFS requires to be carefully studied to achieve appropriate ecological flows, since RFS flows increased reduces the plant's electricity production to the same installed capacity. Balancing RFS requirements and hydroelectric power remains a challenge and, clearly, there is no consensus. Here, we performed an analysis of the main environmental impacts caused by RFS requirements, considering the multiple water use specific for each dam site. The natural variability of river flows provides diversity of habitats and maintains the richness and complexity of biological communities. Therefore, the present study has great ecological, social and economic relevance, since proper evaluation of the RFS requirements avoids potential destabilization of biological communities and even loss of biodiversity. This type of arrangement was more common in dams located in headwaters of rivers, as in the slopes of the Andes mountain range, and in regions like the Alps. There are many hydroelectric plants in South America and Europe that have this type of arrangement of engineering works. But the times are different and the environmental impacts have to be better evaluated. A final aspect also involves the maintenance of ecological flows downstream of dams. Regularization reservoirs need to keep downstream, even if they do not have a TVR, adequate flows that represent minimally the seasonality of the river, with floods and droughts, that propitiate the maintenance of the ecosystems downstream. There are cases such as the Sobradinho Plant in the São Francisco River that has been much questioned in this regard, especially when the climate is changing in the basin, with long periods of drought, and with increasing water use. So this is a very important and increasingly current issue.


Resumo No Brasil, dada a sua hidrologia privilegiada, o uso econômico dos recursos hídricos tem muitas dimensões, como a energia hidrelétrica, agricultura, abastecimento humano. A energia hidrelétrica tem enfrentado e enfrentará cada vez mais avaliações de impacto social e ambiental rigorosas (notadamente na região amazônica onde está localizado 40% do potencial). Os últimos estudos de inventário de para implantação de hidrelétricas por esse motivo tem sido feitos procurando soluções que minimizem a área de inundação e abandonando aquelas alternativas que propunham a modificação dos fluxos naturais dos rios, com a construção de reservatórios de regularização. Algumas dessas soluções de engenharia envolvem a proposição de um trecho de vazão reduzida, um trecho de rio que vai da barragem até o ponto em que as águas são devolvidas ao seu curso natural, após passar pelas turbinas, de forma a aproveitar a queda proporcionada pelo rio e pela barragem. Esse estirão fluvial é conhecido como trecho de fluxo ou vazão reduzida (TVR). Mesmo mega-projetos, como a represa de Belo Monte (11,3 GW), são projetados desta forma, com fluxos desviados por vales e canais laterais, escavados (nesse caso chegando a um surpreendente 13000 m3 (de material escavado superior ao do Canal do Panamá). Assim o TVR sofre um impacto severo e definitivo, local onde a vazão natural será diminuída e que precisa ser cuidadosamente estudado para se possa propor fluxos ecológicos adequados, uma vez que um aumento nos fluxos no TVR reduz a produção de eletricidade da planta para a mesma capacidade instalada. A forma de equilibrar os requisitos do TVR e a energia hidroelétrica continua a ser um desafio, e claramente não há consenso. Neste estudo, realizamos uma análise dos principais impactos ambientais causados pelos requisitos do TVR, considerando as múltiplas utilizações de água específicas para cada local da barragem. O estudo é relevante porque a variabilidade natural dos fluxos dos rios fornece diversidade de habitats e mantém a riqueza e a complexidade das comunidades biológicas. Se os requisitos do TVR não forem adequadamente avaliados, pode haver uma desestabilização de comunidades biológicas e até mesmo uma perda de biodiversidade. Esse tipo de arranjo era mais comum em barragens localizadas em cabeceiras de rios, como nas encostas da cordilheira dos Andes, e em regiões como os Alpes. Existem muitas hidrelétricas na América do Sul e na Europa que possuem esse tipo de arranjo de obras de engenharia. Mas os tempos são outros e os impactos ambientais tem que ser melhor avaliados. Um último aspecto também envolve a manutenção de fluxos ecológicos a jusante de barragens. Reservatórios de regularização precisam manter a jusante, mesmo que não tenham um TVR, fluxos adequados que representem minimamente a sazonalidade do rio, com cheias e estiagens, que propiciem a manutenção dos ecossistemas a jusante. Existem casos como o da Usina de Sobradinho no rio São Francisco que tem sido muito questionado nesse aspecto, notadamente quando o clima está mudando na bacia, com longos períodos de estiagem, e com crescimento dos conflitos de uso da água. Portanto esse é um tema importantíssimo e cada vez mais atual.


Subject(s)
Water Movements , Rivers , Environment , Brazil , Hydrology , Droughts , Floods
11.
Rev. cuba. salud pública ; 45(2): e1190, abr.-jun. 2019.
Article in Spanish | LILACS, CUMED | ID: biblio-1043009

ABSTRACT

Introducción: En el último año, el Perú experimentó un fenómeno climático denominado el Niño costero. Este generó lluvias, huaicos e inundaciones, afectando a miles de personas y ocasionando la declaración en emergencia sanitaria del país. A pesar de la ocurrencia de fenómenos similares en las zonas afectadas, estas suelen ser ocupadas como lugares de residencia. Objetivo: Identificar las características de la percepción de riesgo ante las inundaciones en personas que habitan en zonas vulnerables. Método: Investigación empírica cualitativa desarrollada en el año 2017. Se aplicó la técnica de la entrevista semiestructurada a nueve personas residentes en cuatro distritos de Lima (Perú) propensos a inundaciones. La información recolectada se analizó con el apoyo del software para el análisis cualitativo de datos Atlas.ti v.7.0, utilizando elementos de la Teoría Fundamentada para desarrollar los procesos de codificación y categorización. Resultados: Se encontró que los participantes no poseen percepción de riesgo ante la amenaza de las inundaciones. Conciben a las inundaciones como una amenaza cuando experimentan sus consecuencias. Conclusiones: Se requieren desarrollar investigaciones de carácter interdisciplinario que permitan generar evidencia para el desarrollo de intervenciones orientadas a la construcción de una percepción de riesgo coherente con las consecuencias e impacto de las inundaciones(AU)


Introduction: In the last year, Peru experienced a climatic phenomenon called Niño Costero. This generated rains, alluviums and floods affecting thousands of people and causing the declaration of health emergency in the country. In spite of the occurrence of similar phenomena in the affected areas, these are usually occupied as places to live. Objective: To identify the characteristics of risk's perception during floods in people who live in vulnerable zones. Method: A qualitative empirical research was developed in the year 2017. The semi-structured interview technique was conducted in nine people living in four districts of Lima (Peru) whom were susceptible to flooding. The information collected was analyzed with the support of Atlas.ti v. 7.0., software for the qualitative data analysis, using elements of the Grounded Theory to develop the coding and categorization processes. Results: It was found that the participants do not elaborate a perception of risk before the threat of floods. They envisage the floods as a threat when experience their consequences. Conclusions: It is necessary to implement interdisciplinary researches that allow to generate evidence for the development of interventions aimed to the creation of a risk's perception that will be coherent with the consequences and the impact of floods(AU)


Subject(s)
Humans , Risk Groups , Disasters/prevention & control , Floods , El Nino-Southern Oscillation , Peru
12.
Rev. bras. enferm ; 72(3): 687-691, May.-Jun. 2019. tab
Article in English | LILACS, BDENF | ID: biblio-1013559

ABSTRACT

ABSTRACT Objective: To identify critical requirements for nursing practice when responding to hydrological disasters in the rural area. Method: A descriptive, exploratory and qualitative study was developed. The Critical Incidents Technique was adopted. Twenty public health nurses who worked during the flood season in the years of 2014 and 2015 in a rural area in Southern Brazil were interviewed. Content analysis of the data was developed. Results: Critical requirements for nurses' practice were derived from the situations (n=78), critical behaviors (n=98) and consequences to the population (n=43) and to the nurses (n=38) identified. Conclusion / Final considerations: Although the requirements could be related to the established international referential for nurses' practice in disasters, some were described only in this study. They can contribute to the education and practice of nurses in primary health care, strengthening its capacity to face disaster situations by flood in the rural area.


RESUMEN Objetivo: Identificar las exigencias críticas para la práctica de enfermeros en la respuesta a desastres hidrológicos en áreas rurales. Método: Estudio descriptivo, exploratorio y cualitativo. Se adoptó la Técnica de Incidentes Críticos. Se entrevistó a 20 enfermeros de salud pública que trabajaron en la época de las inundaciones en los años 2014 y 2015 en áreas rurales del sur de Brasil. Se realizó el análisis de contenido de los datos. Resultados: Los requisitos críticos para la práctica de los enfermeros fueron originados de las situaciones (n = 78), comportamientos críticos (n = 98) y consecuencias para la población (n = 43) y para los enfermeros (n = 38). Conclusión: Aunque las exigencias pueden estar relacionadas al referencial internacional establecido para la práctica de enfermeros en desastres, algunos sólo se describieron en este estudio. Pueden contribuir a la educación y práctica del enfermero en la atención primaria a la salud, fortaleciendo su capacidad en inundaciones.


RESUMO Objetivo: Identificar as exigências críticas para a prática de enfermeiros na resposta a desastres hidrológicos na área rural. Método: Estudo descritivo, exploratório e qualitativo. Adotou-se a Técnica de Incidentes Críticos. Foram entrevistados 20 enfermeiros de saúde pública que trabalharam na época das inundações nos anos de 2014 e 2015 em áreas rurais do sul do Brasil. Realizou-se a análise de conteúdo dos dados. Resultados: Os requisitos críticos para a prática dos enfermeiros se originaram das situações (n = 78), comportamentos críticos (n = 98) e consequências para a população (n = 43) e para os enfermeiros (n = 38) identificados. Conclusão: Embora os requisitos possam estar relacionados ao referencial internacional estabelecido para a prática de enfermeiros em desastres, alguns foram descritos apenas neste estudo. Eles podem contribuir para a educação e prática do enfermeiro na Atenção Primária à Saúde, fortalecendo sua capacidade de enfrentar situações de desastre por inundação rural.


Subject(s)
Humans , Male , Female , Adult , Rural Population , Nursing/methods , Floods , Task Performance and Analysis , Brazil , Surveys and Questionnaires , Qualitative Research , Middle Aged
13.
Braz. j. microbiol ; 49(4): 714-722, Oct.-Dec. 2018. tab, graf
Article in English | LILACS | ID: biblio-974304

ABSTRACT

ABSTRACT Carnivorous plant species, such as Utricularia spp., capture and digest prey. This digestion can occur through the secretion of plant digestive enzymes and/or by bacterial digestive enzymes. To comprehend the physiological mechanisms of carnivorous plants, it is essential to understand the microbial diversity related to these plants. Therefore, in the present study, we isolated and classified bacteria from different organs of Utricularia breviscapa (stolons and utricles) and from different geographic locations (São Paulo and Mato Grosso). We were able to build the first bacterium collection for U. breviscapa and study the diversity of cultivable bacteria. The results show that U. breviscapa bacterial diversity varied according to the geographic isolation site (São Paulo and Mato Grosso) but not the analyzed organs (utricle and stolon). We reported that six genera were common to both sample sites (São Paulo and Mato Grosso). These genera have previously been reported to be beneficial to plants, as well as related to the bioremediation process, showing that these isolates present great biotechnological and agricultural potential. This is the first report of an Acidobacteria isolated from U. breviscapa. The role of these bacteria inside the plant must be further investigated in order to understand their population dynamics within the host.


Subject(s)
Bacteria/isolation & purification , Magnoliopsida/microbiology , Biodiversity , Phylogeny , Bacteria/classification , Bacteria/growth & development , Bacteria/genetics , Brazil , Floods
14.
Rev. salud pública Parag ; 8(2): [P34-P39], Jul - Dic 2018.
Article in Spanish | LILACS | ID: biblio-980632

ABSTRACT

Introducción: La vigilancia epidemiológica de la morbilidad y la mortalidad relacionadas a los desastres, es fundamental para organizar y gestionar los recursos, equipos y personal necesarios para responder efectivamente a las situaciones de emergencia. Se describe la implementación del sistema de vigilancia intensificada en poblaciones desplazadas por inundaciones en Paraguay, período 2015/2016. Materiales y métodos: Estudio descriptivo de corte trasversal, entre el 28/12/2015 y 12/07/2016, en todo el territorio nacional. Como fuentes de datos se utilizaron la planilla de notificación diaria de enfermedades, el consolidado de situación de albergues. Se diseñó un sistema de carga de datos por la web. Para el análisis de datos se utilizó el programa informático Epi Info 7.1.5, con medidas estadísticas de tendencia central como medias, medianas, proporciones. Resultados: Se registraron 68.699 personas afectadas. De las cuales, 32,4% eran menores de 5 años. Un 48,0 % se alojaron en refugios formales y 36,7% en campamentos informales, en ambos se identificó déficit de condiciones sanitarias básicas. Se registraron 23.877 consultas. Las enfermedades más frecuentes: Infección respiratoria aguda no neumonía (33%), hipertensión arterial (19%), enfermedad tipo influenza (14%), lesiones de la piel (6%) y diarreas (6%). Un 3% correspondió al síndrome febril agudo, dos casos confirmados de leptospirosis. No se registraron brotes de enfermedades infecciosas. Conclusión: La aplicación de la vigilancia intensificada durante el evento de inundación permitió la identificación de grupos de riesgo y sus problemas de salud más frecuentes. Esto fue fundamental en la orientación de los esfuerzos de prevención y control durante del desastre. Palabras claves: Desastres naturales, inundaciones, vigilancia en salud pública, epidemiología, Paraguay.


Introduction: The importance of epidemiological surveillance of morbidity and mortality related to disasters is that it is essential to organize and manage resources, equipment and personnel necessary to respond effectively to emergencies. The implementation of an intensified surveillance system in populations displaced by flooding in the affected regions of Paraguay during the 2015/2016 period is described. Materials and methods: Descriptive study of cross section, between 12/28/2015 and 7/12/2016, throughout the national territory. As data sources, the planning of the daily notifications of diseases is used, the consolidation of the situation of the shelters. A web data loading system was designed. For the analysis of the data, it is the Epi Info 7.1.5 computer program, with measures of central tendency such as means, medians, and proportions. Results: 68,699 affected people were registered. Of which, 32.4% were under 5 years old; 48.0% were housed in formal shelters and 36.7% in informal camps, both of which identified a deficit of basic sanitary conditions. There were 23,877 queries. The most frequent diseases: Acute respiratory infection, pneumonia (33%), hypertension (19%), influenza-like illness (14%), skin lesions (6%) and diarrhea (6%). 3% corresponded to the acute febrile syndrome, two confirmed cases of leptospirosis. There were no outbreaks of infectious diseases. Conclusion: The implementation of intensified surveillance during the flooding event allowed a better understanding of the general situation of the displaced population, as well as the identification of risk groups and their most frequent health problems. This was instrumental in guiding the prevention and control efforts during the disaster. Keywords: Natural disasters, floods, public health surveillance, epidemiology, Paraguay.


Subject(s)
Humans , Male , Female , Pregnancy , Infant, Newborn , Infant , Child, Preschool , Child , Adolescent , Adult , Middle Aged , Aged , Aged, 80 and over , Refugees , Floods , Public Health Surveillance , Human Migration , Paraguay/epidemiology , Risk Groups , Cross-Sectional Studies
15.
Biosci. j. (Online) ; 34(3): 546-555, mai/jun. 2018. tab, ilus, graf
Article in English | LILACS | ID: biblio-966897

ABSTRACT

The objective of this study was to conduct a temporal analysis of biophysical attributes of the river basin of Rio Roncador, located in the municipality of Magé, Rio de Janeiro. SRTM data were used for the determination of the river basin morphometry and two images of the orbital platform Landsat5 TM sensor (01/28/1986 and 02/15/2010) applied the SEBAL algorithm to characterize the landscape dynamics. The results indicate that The river basin has a drainage area equivalent to 186.21 km2, perimeter 101.78 km, circularity index equal to 0.22, form factor 0.26 and compares index 2.09. These results indicate that the river basin is not prone to flooding, mainly due to its elongated form. It was possible to verify that in the interval of 24 years, degradation occurred in the region beyond the change in the coverage of the soil of the river basin. The results indicated a tendency of reduction in the areas of permanent preservation -13.4% of the river basin. It is concluded that anthropogenic actions were able to alter the surface cover of the soil and that, by the way, may have influenced the water dynamics of the river basin.


O objetivo deste estudo foi realizar uma análise temporal de atributos biofísicos da bacia hidrográfica do Rio Roncador, localizado no município de Magé, Rio de Janeiro. Utilizaram-se dados do SRTM para a determinação da morfometria da bacia hidrográfica e duas imagens da plataforma orbital Landsat5 sensor TM (28/01/1986 e 15/02/2010) aplicado o algoritmo SEBAL para caracterizar a dinâmica da paisagem nesse período. Os resultados indicam que a bacia hidrográfica possui uma área de drenagem equivalente a 186,21 km2, perímetro de 101,78 km, índice de circularidade igual a 0,22, fator forma de 0,26 e índice de compacidade de 2,09. Estes resultados indicam que a bacia hidrográfica não é propícia a enchentes, devido principalmente a sua forma alonga. Foi possível verificar que no intervalo de 24 anos ocorreu degradação na região além da mudança na cobertura do solo da bacia hidrográfica. Os resultados obtidos indicaram uma tendência de redução nas áreas de preservação permanente de -13,4% da bacia hidrográfica. Conclui-se que ações antropogênicas foram capazes de alterar a cobertura superficial do solo e que por sinal podem ter influenciado a dinâmica hídrica da bacia hidrográfica.


Subject(s)
Hydrographic Basins , Rivers , Water Resources , Biophysical Phenomena , Floods , Water Cycle
16.
An. acad. bras. ciênc ; 90(1): 85-97, Mar. 2018. tab, graf
Article in English | LILACS | ID: biblio-886897

ABSTRACT

ABSTRACT The Brazilian Pantanal is an extensive wetland with heterogeneous habitats, primarily due to the river-floodplain system and plants with differential adaptations and reproductive strategies. Factors such as altitude, distance among plant formations, and flood pulse must be considered to better understand its diversity. Aiming to assess the influence of biogeographic patterns in this system, we analyzed the floristic composition of six areas along the Paraguay River, including residual relieves, verifying the pattern of similarity, and effects of distance and altitude. We recorded 356 species in 87 families, mostly perennial (75%), and some annuals (15%) and pluriannuals (5%). Herbaceous plants were the most represented (48%), followed by arboreal (23%), shrubby (15%) and epiphytic (14%) habits, only 12% being endemic to Brazil. The studied areas showed low floristic similarity, but higher resemblance of species between neighboring areas, and no relation with altitude. The upper Paraguay River is diverse, with high spatial variability of species, predominantly perennial. The river-floodplain connectivity may be a determinant factor in species richness and occurrence of endemic species.


Subject(s)
Plants/classification , Biodiversity , Wetlands , Altitude , Plant Dispersal/physiology , Seasons , Species Specificity , Tropical Climate , Brazil , Analysis of Variance , Rivers , Floods
17.
Article in Chinese | WPRIM | ID: wpr-687791

ABSTRACT

<p><b>OBJECTIVE</b>To establish a public health risk assessment indexes for flood disaster.</p><p><b>METHODS</b>Delphi method and expert consultation were used to establish the public health risk assessment index system and scoring criteria, and the analytic hierarchy process (AHP) method was used to obtain the weight of the indexes. Then, the established index system was applied to evaluate the public health risk of the flood disaster in Anhui province, 2016.</p><p><b>RESULTS</b>A public health risk assessment system consisting of 5 categories and 17 indexes was constructed. The assessment result of the flood disaster in Anhui province of 2016 showed that the public health risk score was 0.26, suggesting that "the health emergency measures were effective, and the public health risks were effectively controlled".</p><p><b>CONCLUSIONS</b>The established indexes can effectively assess the health risk of flood disaster and also can provide the reference for other disaster assessment.</p>


Subject(s)
Disasters , Floods , Risk Assessment
18.
Article in Chinese | WPRIM | ID: wpr-776424

ABSTRACT

To investigate the effects of the expression of flavonoid 3' hydroxylase gene ( and active ingredients in under flooding stress, we cloned F3'H from Hangju (temporarily named ) and conducted bioinformatics analysis. During the flower bud differentiation stage, we flooded the and then used the Real-time PCR to detect the relative expression of ; Finally, active ingredients of the inflorescence were measured by HPLC.The sequencing results showed that 1 562 bp sequence was acquired with the largest open reading frame of 1 527 bp, which encoded 508 amino acids. The phylogenetic tree found that was highly homologous to other species of Compositae. Real-time PCR results showed that had a significant response to flooding stress and had the highest expression level after flooding for 24 h, which was about 9 times as that of the control group. The results of HPLC showed that luteolin and luteoloside, the downstream products catalyzed by the F3'H, were significantly higher than those in the control group. It was also found that the contents of chlorogenic acid and 3,5- acid were also significantly higher than those of the control group. Therefore, regulates the synthesis of downstream products by regulating the expression of in the flavonoid synthesis pathway under flooding stress, thereby responding to flooding stress. The flooding stress during flower bud differentiation can significantly enhance the accumulation of active ingredients.


Subject(s)
Chrysanthemum , Genetics , Cloning, Molecular , Cytochrome P-450 Enzyme System , Genetics , Floods , Gene Expression Regulation, Plant , Glucosides , Luteolin , Phylogeny , Plant Proteins , Genetics , Stress, Physiological
19.
Pensam. psicol ; 15(2): 79-92, jul.-dic. 2017. tab
Article in Spanish | LILACS | ID: biblio-895195

ABSTRACT

Objetivo. Comparar niveles de percepción de riesgo de inundación y apego al lugar en grupos con diferente exposición y experiencia frente al riesgo. Método. Con enfoque empírico analítico, un diseño comparativo de tipo transversal y utilizando los instrumentos PAM y PRI modificados, se evaluaron dos grupos del corregimiento de Bolombolo (Antioquia, Colombia), cuya experiencia y exposición al riesgo de inundación era alta (n = 119) y media (n = 89). Los análisis fueron descriptivos, comparativos (U de Mann Whitney y Kruskal Wallis) y de correlación (Spearman). Resultados. Se halló una alta percepción de riesgo de inundación en ambos grupos, aunque con un nivel más alto en el primero, específicamente, en la dimensión referida al temor a las afectaciones. El apego al lugar se encontró en un alto nivel en los dos grupos. Conclusión. La exposición y la experiencia frente a la amenaza de inundación pueden pensarse como predictores de percepción de este riesgo, en particular, en su dimensión afectiva. Los vínculos con el lugar han sido desarrollados por las poblaciones pese a su exposición al riesgo de inundación. La antigüedad residencial, así como la tenencia de la vivienda, son elementos diferenciales respecto de los niveles en las variables de estudio.


Objective. This study compared the levels of place attachment and flood risk perception in populations with different experience and exposure to this risk. Method. It was based on empirical-analytical approach with a comparative design, transversal type. Using the PAM and PRI modified instruments, two groups of people from villages in Bolombolo (Antioquia, Colombia) were evaluated, whose experience and exposure to flood risk was high (n=119) and medium (n=89). Analyses were descriptive, comparative (U of Mann Whitney and Kruskal Wallis) and correlations (Spearman). Results. A high risk perception of flooding was found in both groups, although the level was higher in the group with greater exposure and experience to this risk, specifically in the dimension about fear of the effects associated with this natural phenomenon; also, place attachment was found in high levels in the groups studied. Conclusion. Results showed that the exposure and experience to flooding could be thought of as predictors of risk perception, mainly in its emotional dimension. People, despite their exposure and experience to this risk, have developed bonds with place. Residential antiquity and housing tenure are differential elements with respect to the levels in the study variables.


Escopo. O estudo comparou níveis de percepção de risco de inundação e apego ao lugar em grupos com diferente exposição e experiência frente ao risco. Metodologia. Com um enfoque empírico e analítico, um desenho comparativo de tipo transversal, e utilizando os instrumentos PAM e PRI modificados, foram avaliados dois grupos do corregimento de Bolombolo (Antioquia-Colômbia), com experiência e exposição ao risco alta (n=119) e média (n=89). As análises foram descritivas, comparativas (U de Mann Whitney e Kruskal Wallis) e de correlação (Spearman). Resultados. Foi encontrada uma alta percepção de risco de inundação nos dois grupos, ainda que com um nível mais alto no primeiro, especificamente, na dimensão referida ao temor às afetações; o apego ao lugar foi encontrada num alto nível nos dois grupos. Conclusão. A exposição e experiência frente à ameaça de inundação podem ser pensadas como preditores de percepção de este risco, em particular, na sua dimensão afetiva; os vínculos com o lugar tem sido desenvolvidos pelas populações embora sua exposição ao risco de inundação. A antiguidade residencial, assim como a tenência da vivenda, são elementos diferenciais respeito dos níveis nas variáveis de estudo.


Subject(s)
Humans , Perception , Floods , Risk Groups , Environmental Psychology
20.
Braz. j. biol ; 77(2): 402-412, Apr.-June 2017. tab, graf
Article in English | LILACS | ID: biblio-888762

ABSTRACT

Abstract The objective of the present work is to evaluate the seasonal patterns of species richness and abundance of the zooplankton community in a semi-arid river, Northeastern of Brazil. Zooplankton samples were taken in four hydrological periods along the Upper Parnaíba River: April (low), August (dry), November (rising) 2013 and January (flood) 2014. The zooplankton community consisted of 125 species; the testate amoebae was the most species-rich (56 species) and the most abundant group (71.5%) of total zooplankton abundance. Season-specific differences were highly significant. The overall zooplankton richness and abundance was significantly higher during the low (71 species) and flood (878.47 ind.m-3) period, respectively. The hydrological regime was important in structuring the zooplankton community, emphasising the importance of the Parnaíba River and its seasonal variation for biodiversity conservation in the Brazilian semi-arid region.


Resumo O objetivo deste trabalho foi avaliar os padrões sazonais da riqueza de espécies e abundância da comunidade zooplanctônica em um rio do semi-árido, Nordeste do Brasil. As amostragens do zooplâncton foram realizadas em quatro períodos hidrológicos ao longo do alto rio Parnaíba: Abril (vazante), Agosto (seca), Novembro (enchente) de 2013 e Janeiro (cheia) de 2014. A comunidade zooplanctônica foi constituída por 125 espécies, sendo as amebas testáceas o grupo mais rico em espécies (56 espécies) e o grupo mais abundante (71,5%) do zooplâncton. Diferenças significativas foram registradas entre os períodos. A riqueza e a abundância do zooplâncton foram significativamente maiores durante o período de vazante (71 espécies) e cheia (878,47 ind.m-3), respectivamente. Os resultados mostraram ainda, que o regime hidrológico foi importante na estruturação da comunidade zooplanctônica, ressaltando a importância do rio Parnaíba e sua variação sazonal para a conservação da biodiversidade do semi-árido brasileiro.


Subject(s)
Animals , Zooplankton/physiology , Biodiversity , Floods , Seasons , Brazil , Hydrology , Population Density , Rivers
SELECTION OF CITATIONS
SEARCH DETAIL