Unanticipated effects of stand dynamism on Amazonian tree diversity
Laurance, Susan G.W., Andrade, Ana, and Laurance, William F. (2010) Unanticipated effects of stand dynamism on Amazonian tree diversity. Biotropica, 42 (4). pp. 429-434.
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We assessed a general hypothesis of tropical tree diversity that predicts that species richness will be positively correlated with stand dynamism. Our analysis was based one of the largest and longest-running datasets on Amazonian trees (≥10 cm diameter at breast height), with data collected over a 23-yr period within 66 1 ha plots spanning a large (1000 km2) landscape. Within these plots, maximum tree-species richness (329 species/ha) and Fisher's α values (227.5) were among the highest ever recorded. Contrary to the diversity-dynamism concept, tree species richness in our landscape was significantly and negatively associated with stand dynamism (measured as the mean rate of annual tree turnover). Because of this unexpected finding, we critically re-evaluated the relationship between stand dynamism and tree diversity across the Amazon basin and the tropics as a whole. With the inclusion of additional data we found that the relationship between stand dynamism and tree diversity becomes non-significant at larger spatial scales.
|Item Type:||Article (Refereed Research - C1)|
|Keywords:||Amazon; Brazil; forest dynamics; rain forest trees; species richness; tree turnover rates|
|FoR Codes:||05 ENVIRONMENTAL SCIENCES > 0502 Environmental Science and Management > 050202 Conservation and Biodiversity @ 100%|
|SEO Codes:||96 ENVIRONMENT > 9608 Flora, Fauna and Biodiversity > 960899 Flora, Fauna and Biodiversity of Environments not elsewhere classified @ 100%|
|Deposited On:||14 Jan 2011 09:48|
|Last Modified:||18 Oct 2013 01:10|
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