globalchange  > 气候减缓与适应
DOI: 10.1111/ele.12942
Scopus记录号: 2-s2.0-85044422963
论文题名:
Edge fires drive the shape and stability of tropical forests
作者: Hébert-Dufresne L.; Pellegrini A.F.A.; Bhat U.; Redner S.; Pacala S.W.; Berdahl A.M.
刊名: Ecology Letters
ISSN: 1461023X
EISSN: 1461-0248
出版年: 2018
卷: 21, 期:6
起始页码: 794
结束页码: 803
语种: 英语
英文关键词: Bistability ; edge effects ; fire ; forest ; savanna ; scaling
英文摘要: In tropical regions, fires propagate readily in grasslands but typically consume only edges of forest patches. Thus, forest patches grow due to tree propagation and shrink by fires in surrounding grasslands. The interplay between these competing edge effects is unknown, but critical in determining the shape and stability of individual forest patches, as well the landscape-level spatial distribution and stability of forests. We analyze high-resolution remote-sensing data from protected Brazilian Cerrado areas and find that forest shapes obey a robust perimeter–area scaling relation across climatic zones. We explain this scaling by introducing a heterogeneous fire propagation model of tropical forest-grassland ecotones. Deviations from this perimeter–area relation determine the stability of individual forest patches. At a larger scale, our model predicts that the relative rates of tree growth due to propagative expansion and long-distance seed dispersal determine whether collapse of regional-scale tree cover is continuous or discontinuous as fire frequency changes. © 2018 The Authors. Ecology Letters published by CNRS and John Wiley & Sons Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/107447
Appears in Collections:气候减缓与适应

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作者单位: Department of Computer Science and Vermont Complex Systems Center, University of Vermont, Burlington, VT, United States; Santa Fe Institute, 1399 Hyde Park Road, Santa Fe, NM, United States; Department of Earth System Science, Stanford University, Stanford, CA, United States; Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ, United States; Department of Physics, Boston University, Boston, MA, United States; School of Natural Sciences, University of California, Merced, Merced, CA, United States; School of Aquatic and Fishery Sciences, University of Washington, Seattle, WA, United States

Recommended Citation:
Hébert-Dufresne L.,Pellegrini A.F.A.,Bhat U.,et al. Edge fires drive the shape and stability of tropical forests[J]. Ecology Letters,2018-01-01,21(6)
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