Use este identificador para citar ou linkar para este item: http://repositorio.inpa.gov.br/handle/123/1289
Título: The odd man out? Might climate explain the lower tree ?-diversity of African rain forests relative to Amazonian rain forests?
Autor(es): PARMENTIER, INGRID
Malhi, Yadvinder
SENTERRE, BRUNO
WHITTAKER, ROBERT J.
Amazon Tree Diversity Network
Alfonso Alonso
BALINGA, MICHAEL P. B.
BAKAYOKO, ADAMA
BONGERS, FRANS
CHATELAIN, CYRILLE
COMISKEY, JAMES A.
CORTAY, RENAUD
KAMDEM, MARIE-NOËL DJUIKOUO
DOUCET, JEAN-LOUIS
GAUTIER, LAURENT
HAWTHORNE, WILLIAM D.
ISSEMBE, YVES A.
KOUAMÉ, FRANÇOIS N.
KOUKA, LAZARE A.
LEAL, MIGUEL E.
LEJOLY, JEAN
LEWIS, SIMON L.
NUSBAUMER, LOUIS
PARREN, MARC P. E.
PEH, KELVIN S.-H.
PHILLIPS, OLIVER L.
SHEIL, DOUGLAS
SONKÉ, BONAVENTURE
SOSEF, MARC S. M.
SUNDERLAND, TERRY C. H.
Stropp, Juliana
Ter Steege, Hans
SWAINE, MIKE D.
TCHOUTO, M. G. P.
GEMERDEN, BAREND S. VAN
VAN VALKENBURG, JOHAN L. C. H.
WÖLL, HANNSJÖRG
Francisca Dionízia de Almeida Matos
Assunto: Africa
Amazônia
Biodiversity
ISSN: 0022-0477
Revista: Journal of Ecology
Volume: 95
Resumo: 1. Comparative analyses of diversity variation among and between regions allow testing of alternative explanatory models and ideas. Here, we explore the relationships between the tree alpha-diversity of small rain forest plots in Africa and in Amazonia and climatic variables, to test the explanatory power of climate and the consistency of relationships between the two continents.2. Our analysis included 1003 African plots and 512 Amazonian plots. All are located in old-growth primary non-flooded forest under 900 m altitude. Tree alpha-diversity is estimated using Fisher's alpha calculated for trees with diameter at breast height >= 10 cm. Mean diversity values are lower in Africa by a factor of two.3. Climate-diversity analyses are based on data aggregated for grid cells of 2.5 x 2.5 km. The highest Fisher's alpha values are found in Amazonian forests with no climatic analogue in our African data set. When the analysis is restricted to pixels of directly comparable climate, the mean diversity of African forests is still much lower than that in Amazonia. Only in regions of low mean annual rainfall and temperature is mean diversity in African forests comparable with, or superior to, the diversity in Amazonia.4. The climatic variables best correlated with the tree alpha-diversity are largely different in the African and Amazonian data, or correlate with African and Amazonian diversity in opposite directions.5. These differences in the relationship between local/landscape-scale alpha-diversity and climate variables between the two continents point to the possible significance of an array of factors including: macro-scale climate differences between the two regions, overall size of the respective species pools, past climate variation, other forms of long-term and short-term environmental variation, and edaphics. We speculate that the lower alpha-diversity of African lowland rain forests reported here may be in part a function of the smaller regional species pool of tree species adapted to warm, wet conditions.6. Our results point to the importance of controlling for variation in plot size and for gross differences in regional climates when undertaking comparative analyses between regions of how local diversity of forest varies in relation to other putative controlling factors.
URI: http://repositorio.inpa.gov.br/handle/123/1289
ISSN: 0022-0477
DOI: https://dx.doi.org/10.1111/j.1365-2745.2007.01273.x
Aparece nas coleções:Coordenação de Biodiversidade (CBIO)

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