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1.
Biology (Basel) ; 13(8)2024 Aug 17.
Article in English | MEDLINE | ID: mdl-39194566

ABSTRACT

Pinus pinea is an important Mediterranean species due to its adaptability and tolerance to aridity and its high-quality pine nuts. Different forest types located in Mediterranean native and non-native environments provide the opportunity to perform comparative studies on the species' response to climate change. The aims of this study were to elucidate growth patterns of the species growing in native and exotic habitats and to analyze its response to climatic fluctuations, particularly drought, in both geographical contexts. Understanding stone pine (Pinus pinea) growth responses to climate variability in native and exotic habitats by comparing natural stands and plantations may provide useful information to plan adequate management under climate change. By doing so, we enhance the understanding of P. pinea's adaptability and provide practical approaches to its sustainable management. In this study, we reconstructed and compared the stem radial growth of seven stone pine stands, two in southern Spain and five in central-southern Chile, growing under different climatic conditions. We quantified the relationships between growth variability and climate variables (total rainfall, mean temperature, and SPEI drought index). Growth was positively correlated with autumn rainfall in plantations and with autumn-winter rainfall in natural stands. Growth was also enhanced by high autumn-to-spring rainfall in the driest Chilean plantation, whereas in the wettest and coolest plantation, such correlation was found in winter and summer. A negative impact of summer temperature was found only in one of the five Chilean plantations and in a Spanish site. The correlation between SPEI and tree-ring width indices showed different patterns between and within countries. Overall, exotic plantations showed lower sensitivity to climate variability than native stands. Therefore, stone pine plantations may be useful to assist in mitigating climate change.

2.
Data Brief ; 30: 105557, 2020 Jun.
Article in English | MEDLINE | ID: mdl-32368592

ABSTRACT

The data set comes from a tree inventory conducted in an evergreen forest fragment (dominated by Laureliopsis philippiana and Eucryphia cordifolia) and four fragments dominated by Nothofagus obliqua. The forests are located in an agroforestry matrix landscape of the Coastal Mountain Range of the Chilean Lake District. The data collection was carried out using line transect sampling, which was traced through the core of each fragment oriented towards its longest axis. Data provide taxonomic identity, diameter at breast height (DBP), overstory canopy cover, condition (e.g. live or snag), some height samples, and the estimate of the vertical stratification (e.g. canopy or understory) of 462 trees belonging to 19 species. The data also shows a record of 50 woody debris. The geographical location of each forest fragments is also included. Inventories are fundamental for knowledge of species diversity and provide the foundation for more complex analytical studies, such as the distribution of plant assemblages in the landscape; determine the conservation status of species, and research into biogeographical or macro-ecological areas of interest.

3.
J. Anim. Behav. Biometeorol. ; 8(1): 41-48, Jan. 2020. ilus, tab
Article in English | VETINDEX | ID: vti-25814

ABSTRACT

Forest encroachment reduces elephant habitat area while oil palm plantations and industrial plantations reduce and even cut the elephant roaming area. This study aims to estimate the carrying capacity of elephant habitat in Tesso Nilo National Park, Indonesia. Data collection on elephant populations uses direct and indirect surveys. Direct surveys are carried out by direct encounter with the elephants and counting is done at the meeting. The indirect survey was carried out in two ways, namely by counting dung and traces of elephants as well as interviews with mahout and the community. Dung calculation is done by the path method that is on the elephant roaming track. Interviews of mahout and community were conducted to find out the number of elephants passing through residential areas. Based on the results of the study, the capacity of 1 ha of Sumatran elephant feed support was 0.05 Elephants/day for the secondary forest with proper use (P) of 60% with a growth cycle of 60 days. In the area of 1,590.18 ha, the carrying capacity of secondary forest feed can accommodate 83.93 Elephants /day or 84 Elephants/day. One elephant in the secondary forest can be fulfilled their needs with an area of 18.95 ha or means that 1 ha of secondary forest is only able to provide 0.05 Elephants/day. In shrubs, habitat shows that 1 ha of the shrubs can support 0.21 Elephants /day or with an area of 2,132.90 ha capable of supporting elephants as much as 447.91 Elephants/day or 448 Elephants/day. One elephant can be fulfilled with an area of 4.76 ha of bush per day. This shows that the availability of feed in 1 ha of Tesso Nilo National Park area is insufficient for 1 elephant.(AU)


Subject(s)
Animals , Elephants , Ecosystem , Indonesia , Demography
4.
J. Anim. Behav. Biometeorol ; 8(1): 41-48, Jan. 2020. ilus, tab
Article in English | VETINDEX | ID: biblio-1484294

ABSTRACT

Forest encroachment reduces elephant habitat area while oil palm plantations and industrial plantations reduce and even cut the elephant roaming area. This study aims to estimate the carrying capacity of elephant habitat in Tesso Nilo National Park, Indonesia. Data collection on elephant populations uses direct and indirect surveys. Direct surveys are carried out by direct encounter with the elephants and counting is done at the meeting. The indirect survey was carried out in two ways, namely by counting dung and traces of elephants as well as interviews with mahout and the community. Dung calculation is done by the path method that is on the elephant roaming track. Interviews of mahout and community were conducted to find out the number of elephants passing through residential areas. Based on the results of the study, the capacity of 1 ha of Sumatran elephant feed support was 0.05 Elephants/day for the secondary forest with proper use (P) of 60% with a growth cycle of 60 days. In the area of 1,590.18 ha, the carrying capacity of secondary forest feed can accommodate 83.93 Elephants /day or 84 Elephants/day. One elephant in the secondary forest can be fulfilled their needs with an area of 18.95 ha or means that 1 ha of secondary forest is only able to provide 0.05 Elephants/day. In shrubs, habitat shows that 1 ha of the shrubs can support 0.21 Elephants /day or with an area of 2,132.90 ha capable of supporting elephants as much as 447.91 Elephants/day or 448 Elephants/day. One elephant can be fulfilled with an area of 4.76 ha of bush per day. This shows that the availability of feed in 1 ha of Tesso Nilo National Park area is insufficient for 1 elephant.


Subject(s)
Animals , Ecosystem , Elephants , Indonesia , Demography
5.
Acta amaz ; 40(3): 549-555, set. 2010. graf, tab
Article in Portuguese | LILACS, VETINDEX | ID: lil-560525

ABSTRACT

Esta pesquisa teve por objetivo estudar o incremento em diâmetro, área basal e volume, o ingresso e a mortalidade de uma floresta ombrófila aberta/estacional no município de Marcelândia. Os dados são provenientes de 69 parcelas permanentes instaladas e medidas em 2001 e remedidas em 2003 e 2007. Foram avaliados o número de indivíduos e os incrementos em diâmetro, área basal e volume para o período de 2001 a 2007. O ingresso foi determinado como sendo as árvores que atingiram ou ultrapassaram o diâmetro de 17 cm. A mortalidade foi calculada pela soma de todas as árvores com diâmetro igual ou superior a 17 cm encontradas mortas em cada medição. No período considerado de seis anos, teve como resultado para o incremento em diâmetro, área basal e volume respectivamente, 0,34 cm; 0,22 m².ha-1 e 2,11 m³.ha-1. Os valores médios para as taxas de mortalidade e ingresso foram, respectivamente, 0,78% e 0,30%.


This research aimed to study the increase in diameter, basal area, volume, the entry, and the mortality of an open/seasonal ombrophilous forest in the city of Marcelândia. Data were collected in 69 permanent plots established in 2001 and remeasured in 2003 and 2007. The number of individuals and the increases in diameter, basal area, and volume for the period 2001 to 2007 were evaluated. The entry was determined by the trees that have reached or exceeded a diameter of 17 cm. Mortality was calculated as the sum of all found dead trees in each measurement with a diameter equal or more than 17 cm. In the considered period of six years, the results to the increase in diameter, basal area, and volume were respectively, 0.34 cm, 0.22 m².ha-1, and 2.11 m³.ha-1. The average values for the mortality rates and entry respectively were 0.78% and 0.30%.


Subject(s)
Rainforest , Population Dynamics , Amazonian Ecosystem
6.
Acta amaz. ; 40(3)2010.
Article in Portuguese | VETINDEX | ID: vti-450601

ABSTRACT

This research aimed to study the increase in diameter, basal area, volume, the entry, and the mortality of an open/seasonal ombrophilous forest in the city of Marcelândia. Data were collected in 69 permanent plots established in 2001 and remeasured in 2003 and 2007. The number of individuals and the increases in diameter, basal area, and volume for the period 2001 to 2007 were evaluated. The entry was determined by the trees that have reached or exceeded a diameter of 17 cm. Mortality was calculated as the sum of all found dead trees in each measurement with a diameter equal or more than 17 cm. In the considered period of six years, the results to the increase in diameter, basal area, and volume were respectively, 0.34 cm, 0.22 m².ha-1, and 2.11 m³.ha-1. The average values for the mortality rates and entry respectively were 0.78% and 0.30%.


Esta pesquisa teve por objetivo estudar o incremento em diâmetro, área basal e volume, o ingresso e a mortalidade de uma floresta ombrófila aberta/estacional no município de Marcelândia. Os dados são provenientes de 69 parcelas permanentes instaladas e medidas em 2001 e remedidas em 2003 e 2007. Foram avaliados o número de indivíduos e os incrementos em diâmetro, área basal e volume para o período de 2001 a 2007. O ingresso foi determinado como sendo as árvores que atingiram ou ultrapassaram o diâmetro de 17 cm. A mortalidade foi calculada pela soma de todas as árvores com diâmetro igual ou superior a 17 cm encontradas mortas em cada medição. No período considerado de seis anos, teve como resultado para o incremento em diâmetro, área basal e volume respectivamente, 0,34 cm; 0,22 m².ha-1 e 2,11 m³.ha-1. Os valores médios para as taxas de mortalidade e ingresso foram, respectivamente, 0,78% e 0,30%.

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