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1.
Rev. biol. trop ; 70(1)dic. 2022.
Article in Spanish | LILACS-Express | LILACS, SaludCR | ID: biblio-1387712

ABSTRACT

Resumen Introducción: Los humedales se encuentran entre los ecosistemas más productivos, pero actualmente están siendo degradados o eliminados a un ritmo acelerado por múltiples actividades antrópicas. En la costa central de Perú, los humedales sufren incendios recurrentes, y los efectos poco estudiados incluyen el nivel de emisiones y el secuestro de carbono por quema. Objetivo: Estimar el carbono en la biomasa aérea afectada por el fuego y el carbono recuperado por la vegetación al cabo de un año. Métodos: Trabajamos en el humedal costero Los Pantanos de Villa (Lima, Perú) y comparamos áreas quemadas (32 cuadrantes, 1 m2) y no afectadas (33 cuadrantes). Resultados: La vegetación afectada fue predominantemente herbácea y dominada por Phragmites australis, Schoenoplectus americanus, Typha dominguensis y Cladium jamaicense. El incendio afectó 1 147.0 t de biomasa vegetal que almacenó 381.8 t de carbono, generando la emisión de 1 397.1 t de CO2 a la atmósfera. Al cabo de un año se había recuperado el 79 % de la cobertura vegetal, pero solo el 26 % de la biomasa vegetal viva y el 12.8 % del carbono contenido en la vegetación. Conclusiones: Los indicadores apropiados de la resiliencia de los humedales al fuego deben considerar que los humedales afectados por el fuego recuperan rápidamente la cobertura vegetal, pero no el almacenamiento de carbono y la biomasa vegetal.


Abstract Introduction: Wetlands are among the most productive ecosystems, but currently are being degraded or eliminated at accelerated rates by multiple anthropic activities. In the central coast of Peru, wetlands suffer recurring fires, and the little-studied effects include the level of emissions and carbon sequestration by burning. Objective: To estimate carbon in aerial biomass affected by fire, and carbon recovered by the vegetation after one year. Methods: We worked in Los Pantanos de Villa (Lima, Peru) coastal wetland and compared burnt (32 quadrants, 1 m2) and unaffected areas (33 quadrants). Results: The vegetation affected was predominantly herbaceous and dominated by Phragmites australis, Schoenoplectus americanus, Typha dominguensis and Cladium jamaicense. Fire affected 1 147.0 t of plant biomass that stored 381.8 t of carbon, generating the emission of 1 397.1 t of CO2 into the atmosphere. After one year, 79 % of the vegetation cover had recovered, but only 26 % of the plant biomass and 12.8 % of vegetation carbon. Conclusions: Appropriate indicators of wetland fire resilience should consider that fire-impacted wetland rapidly recovers plant cover, but not carbon storage and plant biomass.


Subject(s)
Biomass , Wildfires , Wetlands , Peru
2.
Rev. biol. trop ; 69(4)dic. 2021.
Article in Spanish | LILACS-Express | LILACS, SaludCR | ID: biblio-1387687

ABSTRACT

Resumen Introducción: La familia Scolopacidae (Orden: Charadriiformes) es una de las familias más abundantes en los humedales costeros. El Humedal Costero Poza de la Arenilla cuenta con un registro histórico de 20 especies de escolopácidos; los eventos climáticos podrían afectar la distribución y migración de varias especies de esta familia taxonómica, reduciendo su riqueza y abundancia. Objetivo: Determinar la relación entre la riqueza y la abundancia de las especies pertenecientes a la familia Scolopacidae y la temperatura superficial del mar (TSM) y el índice costero El Niño (ICEN) en el Humedal Costero Poza de la Arenilla. Métodos: Se realizaron muestreos dos veces por mes entre enero 2013 y enero 2019 utilizando el método del conteo total para determinar la abundancia de las especies (N = 292). Se realizó un análisis de correlación de Spearman entre la abundancia, riqueza, TSM e ICEN, y se procedió a calcular la diversidad beta a través del índice de Whittaker, tanto para analizar el recambio anual para cada estación como el recambio estacional dentro de cada año. Resultados: Se obtuvieron dos correlaciones significativas: entre TSM y abundancia y entre ICEN y riqueza. Por otro lado, la prueba ANOSIM arrojó diferencias estacionales en las abundancias de las especies, y la prueba SIMPER arrojó que la mayor diferencia en las abundancias entre estaciones fue entre otoño y primavera (disimilitud de Bray-Curtis = 81.57 %), y la mínima entre invierno y primavera (disimilitud de Bray-Curtis = 49.86 %). Conclusiones: Las dinámicas ecológicas de las comunidades de escolopácidos en La Arenilla se ven modificadas de manera importante en función a las variaciones de los parámetros térmicos ambientales relacionados al cambio climático.


Abstract Introduction: Scolopacidae family (Order: Charadriiformes) is one of the most abundant families found in coastal wetlands. La Arenilla coastal wetland has a historical record of 20 scolopacid species; climatic events could affect the distribution and migration of the several species of this taxonomic family, reducing their species richness and abundance. Objective: The aim of the present study was to determine the relationship between richness and abundance of the species belonging to the Scolopacidae family and both Sea Surface Temperature (SST) and the coastal El Niño index (ICEN) in La Arenilla Coastal Wetland, La Punta, Callao. Methods: Sampling were carried out twice a month, between January 2013 and January 2019 using the Total Count Method in order to determine species abundance (N = 292). A Spearman correlation analysis between abundance, species richness, SST and ICEN was performed, and beta diversity was calculated through the Whittaker index (βw) to analyze both the annual turnover for each season and the seasonal turnover within each year. Results: Two significant correlations were obtained: between SST and abundance and between ICEN and species richness. On the other hand, the ANOSIM test showed seasonal differences in abundance, and the SIMPER test showed that the greatest difference in abundance between seasons was between autumn and spring (Bray-Curtis dissimilarity = 81.57 %), and the minimum difference between winter and spring (Bray-Curtis dissimilarity = 49.86 %). Conclusions: The ecological dynamics of scolopacid communities in La Arenilla coastal wetland face important changes according to the variations in the environmental thermal parameters related to climate change.


Subject(s)
Animals , Birds , Charadriiformes/classification , Peru , Animal Migration
3.
Eng. sanit. ambient ; 26(1): 97-104, jan.-fev. 2021. graf
Article in Portuguese | LILACS-Express | LILACS | ID: biblio-1154113

ABSTRACT

RESUMO O objetivo deste trabalho foi apresentar, por meio da técnica dinâmica dos fluidos computacional (CFD), dois métodos utilizados nas representações conceitual e física da vegetação em meio aquático: meio poroso e elementos geométricos simplificados. Três estudos de caso, que incluem um wetland flutuante e manchas de vegetação, exemplificam a aplicação dos métodos, mostrando suas vantagens e desvantagens. Nas etapas da geometria e da malha, a representação da vegetação como meio poroso é mais simples, prática e rápida do que a da vegetação como elementos geométricos simplificados. Porém, na parte da modelagem das equações, o método do meio poroso não consegue capturar os processos de mistura no interior da vegetação, enquanto o método dos elementos geométricos simplificados consegue.


ABSTRACT The goal of this work was to present, through computation fluid dynamics (CFD), two methods used in the conceptual and physical representation of vegetation in aquatic environments: the porous media approach and the simplified geometric elements. Three case studies, including a floating wetland and patches of vegetation, exemplify how the methods are applied, showing their advantages and disadvantages. At the geometry and meshing stage, the porous media approach shows to be simpler, faster, and more practical than the simplified geometric elements. However, in the equation modeling, the porous media approach is not able to capture the mixing processes inside the vegetation, while the simplified geometric elements method can capture those processes.

4.
Rev. peru. biol. (Impr.) ; 28(1): e19758, Jan-Mar 2021. tab, graf
Article in Spanish | LILACS-Express | LILACS | ID: biblio-1289889

ABSTRACT

Resumen Se presenta una lista preliminar y la diagnosis de las especies de Arctiinae de Arequipa. Se propone a Amastus pallescens como nuevo sinónimo de Amastus cellularis. Por primera vez se da a conocer la hembra de A. cellularis. Se revalida la especie Magnoptera watsoni, que fue sinonímizada hace pocos años con Amastus walkeri. Se recolectó durante el 2017-2018, en 16 estaciones de evaluación que comprendieron 4 rangos altitudinales: 0-1500, 1500-2500, 2500-3500, 3500-4500 m.


Abstract A preliminary list and diagnosis of the Arctiinae species of Arequipa is presented. It is proposed that Amastus pallescens is a new synonym of Amastus cellularis. The female of A. cellularis is reported for the first time. The Magnoptera watsoni species was revalidated, which was synonimized a few years ago with Amastus walkeri. It was collected during 2017-2018, in 16 evaluation stations that included 4 altitudinal ranges: 0-1500, 1500-2500, 2500-3500, 3500-4500 m.

5.
Chinese Journal of Biotechnology ; (12): 3663-3674, 2021.
Article in Chinese | WPRIM | ID: wpr-921455

ABSTRACT

Aquatic plants and the epiphytic microorganisms are important contributors to the purification of constructed wetlands. Taking the dragon-shaped water system of Beijing Olympic Park as a model, this study analyzed the structure and function of the microbial communities reside the sediment, the water body and the rhizosphere and phyllosphere of three submerged plants-Vallisneria natans, Myriophyllum verticillatum, and Potamogeton pectinatus using high-throughput sequencing technology. The results showed that the microbial diversity from the highest to the lowest were samples from sediment, plant rhizosphere, plant phyllosphere and water. The microbial diversity of plant phyllosphere samples were significantly higher than those of the water body. LEfSe analysis showed that different habitats enriched different microbial groups. The sediments mainly enriched anaerobic microbes, while the water body and the phyllosphere of plants mainly enriched aerobic microbes, and the rhizosphere of plants had the both. Functional prediction analysis showed that the abundance of denitrification marker genes in phyllosphere samples was higher than that in samples from rhizosphere, sediment and water body, and the abundance of denitrification marker genes in phyllosphere samples of M. verticillatum and P. pectinatus was higher than that of V. natans. This study could serve as a guidance for the selection of submerged plants and functional microorganisms for constructed wetlands.


Subject(s)
Beijing , Hydrocharitaceae , Microbiota , Rhizosphere , Water
6.
rev. udca actual. divulg. cient ; 23(2): e1656, jul.-dic. 2020. tab, graf
Article in Spanish | LILACS-Express | LILACS | ID: biblio-1157050

ABSTRACT

RESUMEN La presencia de residuos mineros en la región de Coquimbo es un serio problema, que impacta al medio ambiente y a la sociedad. Se estudió el impacto que genera la presencia de un relave abandonado, ubicado en el humedal el Culebrón, que es costero y urbano, determinando la cantidad y la movilidad de algunos elementos, que se encuentran presentes en este relave. Se realizaron dos etapas de muestreos del suelo en la zona del humedal y en el relave, que fueron sometidas a digestión ácida y cuantificación, mediante espectrofotometría de absorción atómica. Los metales con mayor concentración fueron el hierro, seguido del aluminio y, en menor cantidad, zinc, arsénico y plomo. El aluminio tuvo un comportamiento distinto a los demás, ya que presentó baja concentración en el relave y concentraciones equivalentes en las distintas áreas muestreadas, dando la idea que está naturalmente en el humedal. El arsénico presentó una gran movilidad, puesto que su mayor concentración está en el límite del relave y su concentración varió en las distintas zonas del humedal. Del estudio, se concluyó que la distribución de estos elementos en la zona de estudio, se debe a dos factores importantes; el primero, por el proceso geoquímico natural de movilidad de estos componentes y el segundo y más importante es el tsunami que sufrió la comuna de Coquimbo, en 2015.


ABSTRACT The presence of mining waste in the Coquimbo Region is a serious problem, which impacts the environment and society. The impact generated by the presence of an abandoned tailings located in the El Culebrón wetland, which is coastal and urban, was studied, determining the quantity and mobility of some elements that are present in this tailings. Two stages of soil sampling were carried out in the wetland area and in the tailings, which were subjected to acid digestion and quantification by atomic absorption spectrophotometry. The metals with the highest concentration were iron, followed by aluminum, in less quantity were zinc, arsenic, and lead. Aluminum had a different behavior from the others, since it presented low concentration in the tailings, and equivalent concentrations in the different sampled areas, giving the idea that it is naturally in the wetland. Arsenic was highly mobile, since its highest concentration is at the tailings limit and its concentration varied in the different areas of the wetland. From the study, it was concluded that the distribution of these elements in the study area is due to two important factors, the first due to the natural geochemical process of mobility of these components and the second and most important is the tsunami suffered by the commune of Coquimbo in 2015.

7.
rev. udca actual. divulg. cient ; 23(2): e1750, jul.-dic. 2020. tab, graf
Article in Spanish | LILACS-Express | LILACS | ID: biblio-1157054

ABSTRACT

RESUMEN El estado actual y las continuas alteraciones que aquejan a los humedales ubicados en la ciudad de Bogotá (Colombia), motiva el desarrollo de instrumentos y herramientas, que permitan explicar su comportamiento hidrológico bajo tensiones climáticas, como lo es el fenómeno ENSO. Este artículo presenta la formulación de un modelo de las condiciones hidrológicas del humedal urbano de Torca. La simulación, se realizó con el software Vensim® y la validación estadística del modelo, se efectuó mediante un análisis de sensibilidad multivariable (MVSS), a partir del método Montecarlo. Se evidenció que en los años de ocurrencia del fenómeno climatológico ENSO (2001) y (2011), el patrón de comportamiento de la precipitación y del flujo de entrada (Qi) de la cuenca aferente del humedal fueron paralelos. El tiempo hidráulico de retención (THR) sugirió un comportamiento inverso con relación a la precipitación. En efecto, la precipitación promedio mensual fue de 47,8mm y 158,7mm y el THR promedio fue de 55 días y 33 días, para los años El Niño y La Niña, respectivamente. El flujo de entrada y de salida presentaron un comportamiento paralelo durante el período de estudio, debido, probablemente, a que el cuerpo de agua se convirtió en un cauce de salida. Durante El Niño, cuatro meses registraron desbordamiento del humedal (junio, septiembre, octubre y diciembre), con volúmenes de agua superiores a 130.645m3. Durante La Niña, todos los meses registraron desbordamiento del humedal, a excepción de agosto y septiembre, en donde se observaron volúmenes de agua de 100.018m3 y 109.166m3, respectivamente.


ABSTRACT The current state and the continuous changes that affect the wetlands located in the city of Bogotá (Colombia), motivates the development of instruments and tools that illustrate their hydrological behavior under climatic stresses such as the ENSO phenomenon. This article presents the formulation of a model of the hydrological conditions of the urban wetland of Torca. The simulation was carried out with the Vensim® software and the statistical validation of the model was carried out by means of a multivariate sensitivity analysis (MVSS) using the Montecarlo method. It was evidenced that in the years of occurrence of the ENSO climatological phenomenon (2001) and (2011), the behavior pattern of precipitation and inflow (Qi) of the afferent basin of the wetland were parallel. Hydraulic retention time (THR) suggested an inverse behavior in relation to precipitation. Indeed, the average monthly rainfall was 47,8mm and 158,7mm, and the average THR was 55 days and 33 days for the El Niño and La Niña years, respectively. The inflow and outflow presented a parallel behavior during the study period, probably due to the fact that the body of water became an outlet channel. During El Niño, the wetland overflowed for four months (June, September, October and December), with volumes exceeding 130,645m3. During La Niña, the wetland overflowed every month; except for August and September, where volumes of 100.018m3 and 109.166m3 were observed, respectively.

8.
Article | IMSEAR | ID: sea-204892

ABSTRACT

Nitrate-nitrogen and ammonium-nitrogen concentration were evaluated to assess the current nutrient condition of an ecologically as well as economically important wetland of Bangladesh. The contamination condition of surface water nitrate and ammonium of Hail Haor wetland was assessed to understand its probable risk to human health using the water samples collected from total-fifty monitoring stations, 25 each for two different seasons within 2018 to 2019. Nitrate concentration was measured using the spectrophotometer by colorimetric method, whereas ammonium was quantified using the micro Kjeldahl's distillation method. Statistical and geo-spatial analysis revealed an extensive understanding of the temporal and spatial variability as well as possible source identification of the nutrients in the studied area. Medium to a low level of nitrate ranging from 0.95 up to 9.25 mg/L and high ammonium with values from 0.32 up to 1.92 mg/L was a sporadic trend observed in wetland water, with low water season having more concentration than that of wet high water season. Hazard quotients (HQ) obtained from wetland water for four individual age groups recognized wetland water to be safe for consumption (HQ<1) based on its nitrate level. Wetlands can provide valuable ecosystem services, conserve the native and exotic wetland inhabitants and mitigate flood along with their purifying properties of nutrient removal to lessen the public health concerns about nitrate-nitrogen in drinking water. Therefore, appropriate rein in measures, incentivizing water use efficiency, and continuous monitoring of water quality will ensure safety for wetland habitats, also may aware of the risks or opportunities associated with using wetland water for both drinking and agricultural use.

9.
Rev. peru. biol. (Impr.) ; 27(3): 401-405, jul-sep 2020. tab, graf
Article in Spanish | LILACS-Express | LILACS | ID: biblio-1144971

ABSTRACT

Resumen El presente trabajo reporta por primera vez para el Perú a la cianobacteria bentónica Lemmermanniella uliginosa, identificada en muestras de perifiton y sedimentos bentónicos procedentes del humedal de Caucato en el distrito de San Clemente, departamento de Ica. Además, se registra por primera vez al género Lemmermanniella para el país. Se discuten aspectos morfo-taxonómicos de la especie comparándola con poblaciones reportadas para otras localidades en zonas tropicales.


Abstract This work presents the first record of Lemmermmanniella uliginosa from Peru based on periphyton and sediment samples from Caucato wetland (San Clemente district, Ica department). Furthermore, the genus Lemmermmanniella is recorded for the first time for Peru. Morpho-taxonomic comparison with other populations reported in tropical regions is discussed.

10.
Biota Neotrop. (Online, Ed. ingl.) ; 20(supl.1): e20190913, 2020. tab, graf
Article in English | LILACS-Express | LILACS | ID: biblio-1131961

ABSTRACT

Abstract: Tropical wetlands are amongst the most biodiverse ecosystems on Earth and have immense socio-ecological value. However, tropical wetlands are considered exploitable resources and continue to be drained and converted to other "productive" uses. It is therefore urgent to identify and understand the interactions between various drivers of change triggering degradation of such wetlands. In the present study, we systematically reviewed and analyzed the existing literature on wetlands in two tropical countries namely India and Brazil with special reference to inland wetlands, and proposed a conceptual model illustrating the intricate linkages of such wetlands with different drivers of change. We also developed the Nature Futures' Framework to depict the diverse values of inland wetlands contributing to human wellbeing in the two tropical countries. Findings revealed similar drivers of change triggering the degradation of Indian and Brazilian wetlands. These include changes in climate & land use, population growth, poor land governance due to weak policies, besides other anthropogenic activities such as deforestation, and overexploitation of wetland resources. Among these, land-use change such as agriculture intensification and infrastructure development were the major direct drivers; whereas, institutional and governance factors such as the absence of concrete policy measures were the major indirect drivers threatening the inland wetlands in India and Brazil. Results also revealed some contrasting drivers of change such as illegal human settlements, and land grabbing by the brick industry for Indian wetlands; while, gold mining and intensification of bovine systems for Brazilian wetlands. Our paper also provides an insight into the status of wetland conservation in India and Brazil. We recommend the promotion of community-based conservation practices while adopting sustainable livelihood strategies by the local people for the conservation and wise use of inland wetlands in India and Brazil. The arguments raised in the paper have the potential to assist the stakeholders and/or decision-makers towards implementing sustainable management strategies for inland wetlands in the two countries, and tropical wetlands in general.


Resumen: Los humedales tropicales se encuentran entre los ecosistemas con mayor biodiversidad en la Tierra y tienen un inmenso valor socioecológico. Sin embargo, los humedales tropicales se consideran recursos exploTables y continúan siendo drenados y convertidos a otros usos "productivos". Por lo tanto, es urgente identificar y comprender las interacciones entre varios impulsores del cambio que desencadenan la degradación de dichos humedales. En el presente estudio, revisamos y analizamos sistemáticamente la literatura existente sobre humedales en dos países tropicales, a saber, India y Brasil, con especial referencia a los humedales continentales, y propusimos un modelo conceptual que ilustra el intrincado vínculo de dichos humedales con diferentes impulsores del cambio. También desarrollamos el Marco de Nature Futures para resaltar los diversos valores de los humedales continentales de India y Brasil que contribuyen al bienestar humano en los dos países tropicales. Los resultados revelaron impulsores similares de los cambios que desencadenan la degradación de los humedales de la India y Brasil, incluidos los cambios en el clima y el uso de la tierra, el crecimiento de la población, las políticas débiles y la mala gobernanza de la tierra, además de otras actividades antropogénicas como la deforestación y la sobreexplotación de recursos. Entre estos, el cambio en el uso de la tierra, como la intensificación de la agricultura y el desarrollo de infraestructura, fueron los principales impulsores directos, mientras que los factores institucionales y de gobernanza, como la ausencia de medidas políticas concretas, fueron el principal impulsor indirecto que amenazó los humedales continentales de India y Brasil. Los resultados también revelaron algunos factores de cambio contrastantes, como los asentamientos humanos ilegales y el acaparamiento de tierras por parte de la industria del ladrillo para los humedales indios; mientras que la extracción de oro y la intensificación de los sistemas bovinos para los humedales brasileños. Nuestro documento también proporciona una visión sobre el estado de la conservación de humedales en India y Brasil. Recomendamos la promoción de prácticas de conservación basadas en la comunidad al adoptar estrategias de medios de vida sostenibles por parte de la población local para la conservación y el uso racional de los humedales continentales en India y Brasil. Los argumentos planteados en el artículo tienen el potencial de ayudar a las partes interesadas y / o los tomadores de decisiones para implementar estrategias de gestión sostenible para los humedales continentales en los dos países, y para los humedales tropicales en general.

11.
Eng. sanit. ambient ; 24(6): 1127-1137, nov.-dez. 2019. tab, graf
Article in Portuguese | LILACS-Express | LILACS | ID: biblio-1056110

ABSTRACT

RESUMO Neste trabalho, são apresentados os resultados do desempenho de dois sistemas de tratamento combinado de lixiviado de aterros sanitários e lodos de fossas. Na escala de laboratório, empregou-se um geobag de pequenas dimensões e um filtro biológico de percolação a jusante dele. Na escala real, investigou-se o desempenho de uma unidade de tratamento constituída de geobag seguido de lagoas de estabilização e wetland. Em ambos os estudos, empregou-se relação volumétrica de 4:1 (lodo de fossa:lixiviado) e adicionou-se floculante à mistura antes de sua alimentação no geobag. As remoções obtidas na unidade de campo foram superiores às alcançadas em laboratório para os parâmetros carbono orgânico dissolvido (COD) e sólidos em suspensão totais, cujas remoções foram superiores a 50 e a 95%, respectivamente. A remoção de nitrogênio amoniacal, entretanto, foi maior na instalação de bancada (68%). O desempenho desses sistemas de tratamento com relação à toxicidade para os organismos-teste Aliivibriofischeri, Daphniasimillis e Daniorerio também foi investigado.


ABSTRACT This paper presents the performance results of two combined landfill leachate and sewage sludge treatment systems. In the laboratory scale, a small geobag was followed by a trickling filter. In the real scale, the performance of a geobag treatment unit followed by stabilization and wetland lagoons was investigated. In both studies, a 4:1 volumetric ratio (pit sludge: leachate) was employed and flocculant was added to the mixture prior to feeding in the geobag. The field unit removals were higher than those obtained in the laboratory for the following parameters: dissolved organic carbon and suspended solids, whose removals were greater than 50 and 95%, respectively. Ammonium nitrogen was removed at higher percentages in the lab-scale unit (68%). The performance of both treatment units regarding toxicity to Aliivibriofischeri, Daphnia simillis and Danio rerio organisms was also investigated.

12.
Rev. peru. biol. (Impr.) ; 26(4): 521-524, Oct.-Dec 2019. ilus
Article in Spanish | LILACS-Express | LILACS | ID: biblio-1144918

ABSTRACT

En mamíferos silvestres los patrones de coloración atípica como el albinismo ocurren en baja frecuencia y en la literatura científica sus reportes son escasos. Por lo cual los hallazgos de este tipo son importantes para comprender mejor este fenómeno. En el presente trabajo realizamos el primer reporte de albinismo para el cuy silvestre Cavia tschudii (Rodentia) en la costa central de Perú. Este hallazgo también representa el primer registro de albinismo para el género Cavia en el Neotrópico.


In wild mammals, atypical coloration patterns such as albinism occur at a low frequency and are poorly reported in the literature. Therefore, discovery of cases of coloration anomalies are important to better understand this phenomenon. Here, we describe the first reported case of albinism in Cavia tschudii "Wild Guinea Pig" from the central coast of Peru. This discovery also represents the first record of albinism for the genus Cavia in the Neotropics.

13.
Braz. j. biol ; 79(3): 466-469, July-Sept. 2019. graf
Article in English | LILACS | ID: biblio-1001459

ABSTRACT

Abstract Epipompilus aztecus (Cresson, 1869) was registered in South America in 2010. The aim of this paper is to report the first record of E. aztecus in the Brazilian Pantanal. Two female individuals of E. aztecus were collected in the northern portion of the Brazilian Pantanal in Mato Grosso State during November 2015. This new record of E. aztecus represents a range extension for the species.


Resumo Epipompilus aztecus (Cresson, 1869) foi registrado para a América do Sul em 2010. O objetivo deste estudo é relatar o primeiro registro de E. aztecus para o Pantanal brasileiro. Duas fêmeas de E. aztecus foram coletadas na parte norte do Pantanal brasileiro no estado de Mato Grosso, em novembro de 2015. O novo registro de E. aztecus representa uma extensão da distribuição de ocorrência para esta espécie.


Subject(s)
Animals , Female , Wasps/anatomy & histology , Wasps/physiology , Animal Distribution , Brazil
14.
Pesqui. vet. bras ; 39(7): 469-475, July 2019. tab, ilus, mapas
Article in English | LILACS, VETINDEX | ID: biblio-1040718

ABSTRACT

Equine pythiosis is an ulcerative and granulomatous disease of the skin, caused by the oomycete Pythium insidiosum (Pythiaceae). The objective of this study was to describe seven cases of equine pythiosis that occurred from 2012 to 2017 in the eastern region of Uruguay. Six of the seven cases occurred in the eastern wetland ecosystems of the Merin basin, and the remaining case occurred in the wetland fluvial plains of the Tacuarembó River. Lesions consisted of a large, rapidly growing ulcerated tumor with abundant granulation tissue, serosanguineous secretion, and fistulous tracts containing large concretions or kunkers. The animals presented intense pruritus, claudication and loss of body condition, with death or euthanasia in extremis in six cases. The main histological lesions consisted of an eosinophilic and pyogranulomatous inflammatory process, with numerous foci of eosinophilic necrosis (kunkers), collagenolysis, and a Splendore-Hoeppli reaction. In all cases, silver coloration (Grocott) showed intralesional hyphae compatible with P. insidiosum, which was confirmed by immunohistochemistry in three cases. A horse in the terminal phase of the disease was treated with triamcinolone acetonide (50mg IM every 15 days), and fully recovered after 1 year. It is concluded that equine pythiosis is prevalent in the wetland ecosystems of eastern Uruguay and that treatment with triamcinolone is auspicious.(AU)


Pitiose é uma doença granulomatosa e ulcerativa da pele dos equinos causada pelo oomyceto Pythium insidiosum (Pythiaceae). O objetivo deste trabalho foi descrever sete casos de pitiose equina que ocorreram de 2012 a 2017 na região leste do Uruguai. Seis dos sete casos ocorreram no ecossistema de áreas pantanosas da bacia da bacia da Lagoa Mirim Merin e o restante nas planícies fluviais pantanosas do rio Tacuarembó. As lesões se caracterizaram por tumores ulcerados de crescimento rápido com abundante tecido de granulação, secreção serossanguinolenta e presença de tratos fistulosos contendo material coraloide ou kunkers. Os equinos apresentavam prurido intenso, claudicação e perda da condição corporal e seis morreram ou foram eutanasiados in extremis. As principais lesões histológicas consistiam de um processo inflamatório piogranulomatoso com numerosos focos de necrose eosinofílicos (kunkers), colagenólise e reação de Splendori-Hoepli. Em todos os casos a impregnação pela prata (Grocott) revelou a presença de hifas intralesionais compatíveis com P. insidiosum, o que foi confirmado pela imuno-histoquímica em três casos. Um equino em fase terminal da doença foi tratado com triamcinolona acetonida (50mg, IM, a cada 15 dias), recuperando-se completamente após um ano. Conclui-se que a pitiose é uma enfermidade presente em áreas úmidas na região leste do Uruguai e o tratamento com triamcinolona pode ser uma alternativa promissora.(AU)


Subject(s)
Animals , Pythium/isolation & purification , Pythiosis/epidemiology , Horses/microbiology , Uruguay/epidemiology , Wetlands
15.
Eng. sanit. ambient ; 24(3): 585-590, maio-jun. 2019. tab, graf
Article in Portuguese | LILACS-Express | LILACS | ID: biblio-1012061

ABSTRACT

RESUMO O objetivo deste estudo foi avaliar o desempenho da macrófita Typha domingensis Pers., em diferentes etapas de seu desenvolvimento, na remoção de nitrogênio (N) e fósforo (P) em um wetland construído horizontal (WCH) aplicado no tratamento de efluente de bovinocultura leiteira. Para isso, foi realizado o monitoramento do crescimento e dos teores de N e P no tecido foliar das macrófitas, durante um período de 120 dias de crescimento. A macrófita Typha domingensis Pers. foi responsável por uma remoção média de 5,12 e 3,16% das cargas de N e P aplicadas no WCH, respectivamente. As maiores taxas de remoções de nutrientes (30,2 e 6,4 g P kg-1) foram identificadas quando ocorreram as maiores taxas de crescimento foliar (24,17 cm semana-1).


ABSTRACT The objective of this study was to evaluate the performance of macrophyte Typha domingensis Pers. in different development stages in the nitrogen and phosphorus removal from a horizontal flow constructed wetland (WCH) applied for dairy cattle wastewater treatment. In this way, growth, nitrogen and phosphorus levels in the leaf tissue of macrophytes were monitored during a 120-day growth period. Typha domingensis Pers. macrophyte was responsible for a mean removal of 5.12 and 3.16% of the applied loads in the WCH, for nitrogen and phosphorus, respectively. The higher nutriens removal rates (30.2 and 6.4 g P kg-1) were identified when the higher tissue growth rates occurred (24.17 cm week-1).

16.
Eng. sanit. ambient ; 24(1): 187-197, jan.-fev. 2019. tab, graf
Article in Portuguese | LILACS-Express | LILACS | ID: biblio-1001953

ABSTRACT

RESUMO A eco-hidrologia busca integrar os conhecimentos da hidrologia aos da ecologia, criando uma abordagem mais ampla para a compreensão da dinâmica dos recursos hídricos, facilitando o planejamento e as ações de programas de gestão. Uma das formas de integrar hidrologia à ecologia é por meio da elaboração de índices de adequabilidade de hábitat (IAHs), processo que tem se destacado por fornecer informações relevantes sobre áreas úmidas. O IAH é obtido pela relação entre as informações sobre espécies bioindicadoras e as condições eco-hidrológicas necessárias à sua sobrevivência, permitindo a avaliação de impactos sobre as espécies. O desenvolvimento de IAHs, integrados a processos de modelagem hidrodinâmica e sistemas de informação geográfica (SIGs), proporciona a obtenção de imagens de adequabilidade de hábitat, que permitem obter informações espacializadas sobre a qualidade do hábitat de determinada espécie, ou grupo de espécies, colaborando para o aperfeiçoamento das estratégias de gerenciamento dos recursos hídricos e a conservação da biodiversidade de áreas úmidas. A fim de melhor elucidar o processo de desenvolvimento de IAHs e sua aplicação, é apresentada a metodologia utilizada para avaliar a adequabilidade do Banhado do Taim, inserido na Estação Ecológica do Taim, importante área úmida localizada no sul da planície costeira do Rio Grande do Sul.


ABSTRACT The ecohydrology aims at integrating the concepts of hydrology and ecology, creating a broader approach to understand the water resources' dynamics, facilitating the plan and management of resources. One way to integrate hydrology with ecology is by developing Habitat Suitability Index (HSI), a process that stands out by providing relevant information on wetlands. HSI is obtained by relating the information about the bioindicators and ecohydrological conditions necessary to ensure these species' survival, enabling to evaluate the impacts on them. The development of HSIs integrated with hydrodynamic modeling and Geographic Information Systems (GIS) allows us to obtain spatialized habitat suitability information, that provide information about the quality of a species' (or group of species') habitat, contributing to the improvement of water resources management strategies combined with the biodiversity conservation in wetlands. Regarding this, the present article presents the HSI's development process and its application to evaluate the suitability of the Taim Basin, inserted in Taim Ecological Station, an important Southern Coastal wetland located in the State of Rio Grande do Sul.

17.
Article | IMSEAR | ID: sea-203664

ABSTRACT

Lake Manzala Engineered Wetland project (LMEWP) is a constructed wetland that has been designed for treating drainagewater coming from Bahr El-Baqar drain. In this study, the concentration of heavy metals (Cu, Zn and Pb) in water, sedimentand different organs of Phragmitesaustralis collected from LMEWP seasonally. The aim of this study was to determine thedynamics of distribution of metals in different parts of phragmitesaustralis, and to determined the bioaccumulation factor(BCF) in different organs of plant phragmitesaustralis and Translocation Factor (TA), particularly to determine the time ofmaximum accumulation in the above-ground tissues and to assess removal capacity of phragmitesaustralis in LMEWP.Results revealed a high significant correlation between heavy metals concentrations in phragmitesaustralis with its locationin LMEWP vegetation cell; start cell> end cell. The highest concentration of metals is mostly found in phragmitesaustralisroot. All metals were accumulated in root over time until the end of the growing season after eight months. On the otherside, metal concentrations in stem and leaves increased even after the growing season of the plant. Overall, the resultssuggest to harvestphragmitesaustralis before six months IN the growing season in order to improve the accumulativeefficiency of phragmitesaustralis in LMEWP project.

18.
Article in Chinese | WPRIM | ID: wpr-818934

ABSTRACT

Objective To investigate the epidemic factors of schistosomiasis in wetlands in Sichuan Province, so as to provide scientific evidence for the prevention and control of schistosomiasis in wetlands. Methods The artificial and natural wetlands were selected from Sichuan Province, and the relevant data regarding wetlands were collected. Routine snail survey, investigation on human morbidity due to schistosomiasis, snail diffusion experiments, questionnaire survey, determination of water infectivity and retrospective survey were conducted. Results In Sichuan Province, the mean densities of living snails were 0.003 snails/0.1 m2 and 2.033 snails/0.1 m2 in the upper and lower reaches of the Meiwan Reservoir wetlands, 0.08 snails/0.1 m2 in the Jinyan Lake of Guanghan City, 0.21 snails/0.1 m2 in Muhe River of Guanghan City, and 0.02 snails/0.1 m2 prior to the construction of Qiong-hai wetland park in Xichang City in 2015. Artificial simulation experiments showed that the largest distance of snail diffusion in water was 2 000 m. There were 8.80% (41/466) of subjects that lived neighboring wetlands, worked in wetlands and visited wet-lands having infested water contact behaviors. A total of 690 sentinel mice were assigned, and no Schistosoma japonicum infection was detected in the 677 mice dissected. Retrospective survey showed that the construction of the Meiwan Reservoir caused the spread of schistosomiasis in Dailing County, and snails were found in the ditches entering the Jinyan Lake and in Jinyan Lake areas 5 years following the construction of the Jinyan Lake in Guanghan City, with S. japonicum -infected snails detected in the ditches entering the Jinyan Lake. Conclusions O. hupensis snails are found in some wetlands in Sichuan Province. Protection of wetlands and snail control with environmental improvements are recommended for the prevention of snail importation in natural wetlands, while in artificial wetlands, thorough snail control is recommended during the construction of the wetlands because of the likelihood of snail importation via water systems. In addition, both natural and artificial wetlands require long-term systematic surveillance of schistosomiasis.

19.
Article in Chinese | WPRIM | ID: wpr-818482

ABSTRACT

Objective To investigate the epidemic factors of schistosomiasis in wetlands in Sichuan Province, so as to provide scientific evidence for the prevention and control of schistosomiasis in wetlands. Methods The artificial and natural wetlands were selected from Sichuan Province, and the relevant data regarding wetlands were collected. Routine snail survey, investigation on human morbidity due to schistosomiasis, snail diffusion experiments, questionnaire survey, determination of water infectivity and retrospective survey were conducted. Results In Sichuan Province, the mean densities of living snails were 0.003 snails/0.1 m2 and 2.033 snails/0.1 m2 in the upper and lower reaches of the Meiwan Reservoir wetlands, 0.08 snails/0.1 m2 in the Jinyan Lake of Guanghan City, 0.21 snails/0.1 m2 in Muhe River of Guanghan City, and 0.02 snails/0.1 m2 prior to the construction of Qiong-hai wetland park in Xichang City in 2015. Artificial simulation experiments showed that the largest distance of snail diffusion in water was 2 000 m. There were 8.80% (41/466) of subjects that lived neighboring wetlands, worked in wetlands and visited wet-lands having infested water contact behaviors. A total of 690 sentinel mice were assigned, and no Schistosoma japonicum infection was detected in the 677 mice dissected. Retrospective survey showed that the construction of the Meiwan Reservoir caused the spread of schistosomiasis in Dailing County, and snails were found in the ditches entering the Jinyan Lake and in Jinyan Lake areas 5 years following the construction of the Jinyan Lake in Guanghan City, with S. japonicum -infected snails detected in the ditches entering the Jinyan Lake. Conclusions O. hupensis snails are found in some wetlands in Sichuan Province. Protection of wetlands and snail control with environmental improvements are recommended for the prevention of snail importation in natural wetlands, while in artificial wetlands, thorough snail control is recommended during the construction of the wetlands because of the likelihood of snail importation via water systems. In addition, both natural and artificial wetlands require long-term systematic surveillance of schistosomiasis.

20.
Rev. peru. biol. (Impr.) ; 25(3): 291-306, jul.-set. 2018. ilus, tab
Article in Spanish | LILACS-Express | LILACS | ID: biblio-1094327

ABSTRACT

El Refugio de Vida Silvestre Pantanos de Villa está incorporado al Sistema Nacional de Áreas Protegidas por el Estado del Perú. Se encuentra en el sur de la ciudad de Lima, entre los kilómetros 18 y 21 de la antigua carretera Panamericana Sur en el distrito de Chorrillos. Tiene una extensión de 263.27 ha. De Bernacasse en 1903, fue el primero de los exploradores naturalistas que efectuó un inventario de las aves de Villa registrando 138 especies, pero es desde 1994 hasta la fecha, en que numerosos autores han contribuido con información importante sobre las aves de este humedal. En el presente trabajo, se realiza una revisión y análisis de las investigaciones que durante ciento quince años han registrado 211 especies de aves, 97 de las cuales son residentes y 114 provienen de otras latitudes, entre migrantes, visitantes ocasionales y una especie introducida.


The Pantanos de Villa Wildlife Refuge is incorporated into the National System of Protected Areas by the State of Peru. It is located in the south of the city of Lima, between kilometers 18 and 21 of the old South Panamerican Highway in the district of Chorrillos. It has an extension of 263.27 hectares. From De Bernacasse in 1903, he was the first of the naturalist explorers to carry out an inventory of Villa birds, recording 138 species, but it is from 1994 to date, when numerous authors have contributed important information about the birds of this wetland. In the present work, a review and analysis of the research that has recorded 211 species of birds for a hundred and fifteen years, 97 of which are residents and 114 from other latitudes, between migrants, occasional visitors and an introduced species.

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