Use este identificador para citar ou linkar para este item: https://repositorio.inpa.gov.br/handle/1/14736
Título: Habitat fragmentation, variable edge effects, and the landscape-divergence hypothesis
Autor: Laurance, William F.
Nascimento, Henrique Eduardo Mendonça
Laurance, Susan G.W.
Andrade, Ana C.S.
Ewers, Robert M.
Harms, Kyle E.
Luizâo, Regina Celi Costa
Ribeiro, José Eduardo L.S.
Palavras-chave: Carbon
Carbon Storage
Conservation Biology
Drought
Forest Dynamics
Forest Fragmentation
Habitat Fragmentation
Hypothesis
Landscape Ecology
Plant Community
Prediction
Spatial Soil Variability
Species Composition
Species Invasion
Vegetation Dynamics
Weather
Biodiversity
Ecology
Ecosystem
Environment
Environmental Protection
Geography
Population Dynamics
Reproducibility
Species Difference
Statistical Model
Time
Tropic Climate
Biodiversity
Conservation Of Natural Resources
Ecology
Ecosystem
Environment
Geography
Linear Models
Population Dynamics
Reproducibility Of Results
Species Specificity
Time Factors
Tropical Climate
Data do documento: 2007
Revista: PLoS ONE
Encontra-se em: Volume 2, Número 10
Abstract: Edge effects are major drivers of change in many fragmented landscapes, but are often highly variable in space and time. Here we assess variability in edge effects altering Amazon forest dynamics, plant community composition, invading species, and carbon storage, in the world's largest and longest-running experimental study of habitat fragmentation. Despite detailed knowledge of local landscape conditions, spatial variability in edge effects was only partially foreseeable: relatively predictable effects were caused by the differing proximity of plots to forest edge and varying matrix vegetation, but windstorms generated much random variability. Temporal variability in edge phenomena was also only partially predictable: forest dynamics varied somewhat with fragment age, but also fluctuated markedly over time, evidently because of sporadic droughts and windstorms. Given the acute sensitivity of habitat fragments to local landscape and weather dynamics, we predict that fragments within the same landscape will tend to converge in species composition, whereas those in different landscapes will diverge in composition. This 'landscape-divergence hypothesis', if generally valid, will have key implications for biodiversity-conservation strategies and for understanding the dynamics of fragmented ecosystems.
DOI: 10.1371/journal.pone.0001017
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