globalchange  > 气候减缓与适应
DOI: 10.1038/ngeo2182
论文题名:
Indonesian vegetation response to changes in rainfall seasonality over the past 25,000 years
作者: Dubois N.; Oppo D.W.; Galy V.V.; Mohtadi M.; Van Der Kaars S.; Tierney J.E.; Rosenthal Y.; Eglinton T.I.; Lückge A.; Linsley B.K.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2014
卷: 7, 期:7
起始页码: 513
结束页码: 517
语种: 英语
Scopus关键词: aridity ; climate forcing ; community response ; Holocene ; isotopic composition ; Last Glacial Maximum ; paleoclimate ; paleoecology ; rainfall ; seasonality ; vegetation cover ; warm pool ; water stress ; Australia ; Borneo ; East Nusa Tenggara ; Greater Sunda Islands ; Indonesia ; Java ; Lesser Sunda Islands ; Sumba ; Sunda Isles ; Tracheophyta
英文摘要: The hydrologic response to climate forcing in the Indo-Pacific warm pool region has varied spatially over the past 25,000 years. For example, drier conditions are inferred on Java and Borneo for the period following the end of the Last Glacial Maximum, whereas wetter conditions are reconstructed for northwest Australia. The response of vegetation to these past rainfall variations is poorly constrained. Using a suite of 30 surface marine sediment samples from throughout the Indo-Pacific warm pool, we demonstrate that today the stable isotopic composition of vascular plant fatty acids (13 Cfa) reflects the regional vegetation composition. This in turn is controlled by the seasonality of rainfall consistent with dry season water stress. Applying this proxy in a sediment core from offshore northeast Borneo, we show broadly similar vegetation cover during the Last Glacial Maximum and the Holocene, suggesting that, despite generally drier glacial conditions, there was no pronounced dry season. In contrast, 13Cfa and pollen data from a core off the coast of Sumba indicate an expansion of C 4 herbs during the most recent glaciation, implying enhanced aridity and water stress during the dry season. Holocene vegetation trends are also consistent with a response to dry season water stress. We therefore conclude that vegetation in tropical monsoon regions is susceptible to increases in water stress arising from an enhanced seasonality of rainfall, as has occurred in past decades. © 2014 Macmillan Publishers Limited.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106535
Appears in Collections:气候减缓与适应
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作者单位: Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, United States; Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, United States; MARUM-Center for Marine Environmental Sciences, University of Bremen, 28359 Bremen, Germany; Centre for Palynology and Paleoecology, Department of Geography and Environmental Science, Monash University, Clayton, VIC 3800, Australia; Department of Earth Sciences, Faculty of Earth and Life Sciences, Vrije Universiteit, De Boelelaan 1085, 1081 HV Amsterdam, Netherlands; Institute of Marine and Coastal Sciences, Rutgers, State University, New Brunswick, NJ 08901, United States; Department of Geology, Rutgers, State University, New Brunswick, NJ 08901, United States; ETH Zurich, 8092 Zurich, Switzerland; Bundesanstalt für Geowissenschaften und Rohstoffe (BGR), 30655 Hannover, Germany; Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY 10694, United States; Eawag, Überlandstrasse 133, 8600 Dübendorf, Switzerland

Recommended Citation:
Dubois N.,Oppo D.W.,Galy V.V.,et al. Indonesian vegetation response to changes in rainfall seasonality over the past 25,000 years[J]. Nature Geoscience,2014-01-01,7(7)
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