globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.12312
论文题名:
Response of an old-growth tropical rainforest to transient high temperature and drought
作者: Silva C.E.; Kellner J.R.; Clark D.B.; Clark D.A.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2013
卷: 19, 期:11
起始页码: 3423
结束页码: 3434
语种: 英语
英文关键词: Canopy ; Costa Rica ; Drought ; Global change ; La Selva ; Rainforest
Scopus关键词: canopy ; climate modeling ; drought ; environmental disturbance ; global change ; growth rate ; high temperature ; rainforest ; topography ; tropical forest ; Costa Rica ; Heredia ; La Selva ; article ; canopy ; Costa Rica ; drought ; global change ; growth, development and aging ; La Selva ; rain forest ; temperature ; tree ; tropic climate ; canopy ; Costa Rica ; drought ; global change ; La Selva ; rainforest ; Costa Rica ; Droughts ; Temperature ; Trees ; Tropical Climate
英文摘要: Tropical rainforests have experienced episodes of severe heat and drought in recent decades, and climate models project a warmer and potentially drier tropical climate over this century. However, likely responses of tropical rainforests are poorly understood due to a lack of frequent long-term measurements of forest structure and dynamics. We analyzed a 12-year record (1999-2010) of 47 817 annual measurements of canopy height to characterize the response of an old-growth Neotropical rainforest to the severe heat and drought associated with the 1997-1998 El Niño. Well-drained soils on slopes and plateaus experienced a threefold increase in the fraction of the landscape in gaps (≤2 m) and a reduction in the fraction in high canopy (>15 m) causing distributions of canopy height to depart from equilibrium for a period of 2-3 years. In contrast, forests on low-lying alluvial terraces remained in equilibrium and were nearly half as likely to experience upper canopy (>15 m) disturbance over the 12 years of observation. Variation in forest response across topographic positions suggests that tropical rainforests are more sensitive to moisture deficits than high temperature and that topography likely structures landscape-level variation in the severity of drought impacts. © 013 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/62287
Appears in Collections:影响、适应和脆弱性

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作者单位: Department of Geographical Sciences, University of Maryland, College Park, MD 20742, United States; Department of Biology, University of Missouri, St. Louis, MO 63121, United States

Recommended Citation:
Silva C.E.,Kellner J.R.,Clark D.B.,et al. Response of an old-growth tropical rainforest to transient high temperature and drought[J]. Global Change Biology,2013-01-01,19(11)
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