Publication Date:
2024-01-31
Description:
Using 2.046 botanically-inventoried tree plots across the largest tropical forest on Earth, we
\nmapped tree species-diversity and tree species-richness at 0.1-degree resolution, and
\ninvestigated drivers for diversity and richness. Using only location, stratified by forest type, as
\npredictor, our spatial model, to the best of our knowledge, provides the most accurate map of
\ntree diversity in Amazonia to date, explaining approximately 70% of the tree diversity and
\nspecies-richness. Large soil-forest combinations determine a significant percentage of the
\nvariation in tree species-richness and tree alpha-diversity in Amazonian forest-plots. We
\nsuggest that the size and fragmentation of these systems drive their large-scale diversity
\npatterns and hence local diversity. A model not using location but cumulative water deficit,
\ntree density, and temperature seasonality explains 47% of the tree species-richness in the
\nterra-firme forest in Amazonia. Over large areas across Amazonia, residuals of this relationship are small and poorly spatially structured, suggesting that much of the residual
\nvariation may be local. The Guyana Shield area has consistently negative residuals, showing
\nthat this area has lower tree species-richness than expected by our models. We provide
\nextensive plot meta-data, including tree density, tree alpha-diversity and tree speciesrichness results and gridded maps at 0.1-degree resolution.
Repository Name:
National Museum of Natural History, Netherlands
Type:
info:eu-repo/semantics/article
Format:
application/pdf
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