Can neutral theory predict the responses of Amazonian tree communities to forest fragmentation?
We use Hubbell's neutral theory to predict the impact of habitat fragmentation on Amazonian tree communities. For forest fragments isolated for about two decades, we generate neutral predictions for local species extinction, changes in species composition within fragments, and increases in the proba...
| Autor principal: | Gilbert, Benjamin |
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| Outros Autores: | Laurance, William F., Leigh, Egbert Giles, Nascimento, Henrique Eduardo Mendonça |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
American Naturalist
2020
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| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/18727 |
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oai:repositorio:1-18727 |
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oai:repositorio:1-18727 Can neutral theory predict the responses of Amazonian tree communities to forest fragmentation? Gilbert, Benjamin Laurance, William F. Leigh, Egbert Giles Nascimento, Henrique Eduardo Mendonça Extinction Forest Ecosystem Habitat Fragmentation Plant Community Probability Rainforest Species Complex Tree Biological Model Ecosystem Environmental Protection Physiology Species Extinction Tree Conservation Of Natural Resources Ecosystem Extinction, Biological Models, Biological Trees Amazonia South America We use Hubbell's neutral theory to predict the impact of habitat fragmentation on Amazonian tree communities. For forest fragments isolated for about two decades, we generate neutral predictions for local species extinction, changes in species composition within fragments, and increases in the probability that any two trees within a fragment are conspecific. We tested these predictions using fragment and intact forest data from the Biological Dynamics of Forest Fragments Project in central Amazonia. To simulate complete demographic isolation, we excluded immigrants-species absent from a fragment or intact forest plot in the initial census but present in its last census-from our tests. The neutral theory correctly predicted the rate of species extinction from different plots as a function of the diversity and mortality rate of trees in each plot. However, the rate of change in species composition was much faster than predicted in fragments, indicating that different tree species respond differently to environmental changes. This violates the key assumption of neutral theory. When immigrants were included in our calculations, they increased the disparity between predicted and observed changes in fragments. Overall, neutral theory accurately predicted the pace of local extinctions in fragments but consistently underestimated changes in species composition. © 2006 by The University of Chicago. 2020-06-15T22:02:45Z 2020-06-15T22:02:45Z 2006 Artigo https://repositorio.inpa.gov.br/handle/1/18727 10.1086/506969 en Volume 168, Número 3, Pags. 304-317 Restrito American Naturalist |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Extinction Forest Ecosystem Habitat Fragmentation Plant Community Probability Rainforest Species Complex Tree Biological Model Ecosystem Environmental Protection Physiology Species Extinction Tree Conservation Of Natural Resources Ecosystem Extinction, Biological Models, Biological Trees Amazonia South America |
| spellingShingle |
Extinction Forest Ecosystem Habitat Fragmentation Plant Community Probability Rainforest Species Complex Tree Biological Model Ecosystem Environmental Protection Physiology Species Extinction Tree Conservation Of Natural Resources Ecosystem Extinction, Biological Models, Biological Trees Amazonia South America Gilbert, Benjamin Can neutral theory predict the responses of Amazonian tree communities to forest fragmentation? |
| topic_facet |
Extinction Forest Ecosystem Habitat Fragmentation Plant Community Probability Rainforest Species Complex Tree Biological Model Ecosystem Environmental Protection Physiology Species Extinction Tree Conservation Of Natural Resources Ecosystem Extinction, Biological Models, Biological Trees Amazonia South America |
| description |
We use Hubbell's neutral theory to predict the impact of habitat fragmentation on Amazonian tree communities. For forest fragments isolated for about two decades, we generate neutral predictions for local species extinction, changes in species composition within fragments, and increases in the probability that any two trees within a fragment are conspecific. We tested these predictions using fragment and intact forest data from the Biological Dynamics of Forest Fragments Project in central Amazonia. To simulate complete demographic isolation, we excluded immigrants-species absent from a fragment or intact forest plot in the initial census but present in its last census-from our tests. The neutral theory correctly predicted the rate of species extinction from different plots as a function of the diversity and mortality rate of trees in each plot. However, the rate of change in species composition was much faster than predicted in fragments, indicating that different tree species respond differently to environmental changes. This violates the key assumption of neutral theory. When immigrants were included in our calculations, they increased the disparity between predicted and observed changes in fragments. Overall, neutral theory accurately predicted the pace of local extinctions in fragments but consistently underestimated changes in species composition. © 2006 by The University of Chicago. |
| format |
Artigo |
| author |
Gilbert, Benjamin |
| author2 |
Laurance, William F. Leigh, Egbert Giles Nascimento, Henrique Eduardo Mendonça |
| author2Str |
Laurance, William F. Leigh, Egbert Giles Nascimento, Henrique Eduardo Mendonça |
| title |
Can neutral theory predict the responses of Amazonian tree communities to forest fragmentation? |
| title_short |
Can neutral theory predict the responses of Amazonian tree communities to forest fragmentation? |
| title_full |
Can neutral theory predict the responses of Amazonian tree communities to forest fragmentation? |
| title_fullStr |
Can neutral theory predict the responses of Amazonian tree communities to forest fragmentation? |
| title_full_unstemmed |
Can neutral theory predict the responses of Amazonian tree communities to forest fragmentation? |
| title_sort |
can neutral theory predict the responses of amazonian tree communities to forest fragmentation? |
| publisher |
American Naturalist |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/18727 |
| _version_ |
1787143938783576064 |
| score |
11.755432 |