气候变化领域集成服务门户(CCPortal): The African Humid Period; rapid climate change events; the timing of human colonization; and megafaunal extinctions in Madagascar during the Holocene: Evidence from a 2m Anjohibe Cave stalagmite

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DOI	10.1016/j.quascirev.2019.02.004
	The African Humid Period; rapid climate change events; the timing of human colonization; and megafaunal extinctions in Madagascar during the Holocene: Evidence from a 2m Anjohibe Cave stalagmite
	Wang L.; Brook G.A.; Burney D.A.; Voarintsoa N.R.G.; Liang F.; Cheng H.; Edwards R.L.
发表日期	2019
ISSN	0277-3791
起始页码	136
结束页码	153
卷号	210
英文摘要	Stalagmite data from Anjohibe Cave in northwest Madagascar suggest six distinct climate periods from 9.1 to 0.94 ka. Periods I and II (9.1–4.9 ka) were wetter and punctuated by a series of prominent droughts. Periods IV-VI (4–0.94 ka) were much drier and less variable. Period III (4.9-4 ka) marks the transition between wetter and drier conditions and consists of two significant droughts: the first (4.8–4.6 ka) coincides approximately with the end of the African Humid Period and the second (4.3–4.0 ka) may be the expression of the Northern Hemisphere 4.2 ka dry event in northwest Madagascar. Strong positive correlations between δ 13 C and δ 18 O values in Periods I-IV (r = 0.63–0.91) suggest that both isotopes were influenced by natural climate changes indicating that humans may not have been present in the area. In contrast, during Periods V (r = 0.07) and VI (r = −0.12) the “decoupling” of δ 13 C and δ 18 O might signal an impact from human activities starting around 2.5 ka. Rapid changes in climate during the early and middle Holocene, with prominent droughts lasting up to 800 years, did not kill off Madagascar's megafauna, and neither did a human population, present since the early Holocene if evidence from south Madagascar is reliable. However, many extinctions occurred under the more stable climatic conditions of the late Holocene, despite an antiphase climate relationship between northern and southcentral Madagascar. This suggests that initial human colonization, or significant increase in human population, triggered the megafaunal extinctions by hunting and destruction of megafaunal habitats. © 2019 Elsevier Ltd
英文关键词	Holocene; Human colonization; Megafaunal extinction; Paleoclimatology; Southern hemisphere; Stalagmite
语种	英语
scopus关键词	Caves; Drought; Timing circuits; Holocenes; Human colonization; Paleoclimatology; Southern Hemisphere; Stalagmite; Climate change; climate conditions; climate variation; colonization; extinction; Holocene; human activity; humid environment; hunting; Northern Hemisphere; paleoclimate; Southern Hemisphere; stalagmite; Anjohibe Cave; Madagascar; Madagascar; Mahajanga
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151979
作者单位	Department of Geography, University of Georgia, Athens, GA 30602-2502, United States; National Tropical Botanical Garden, 3530 Papalina Road, Kalaheo, HI 96741, United States; Department of Geology, University of Georgia, Athens, GA 30602-2502, United States; Department of Geography, Western Illinois University, Macomb, IL 61455, United States; Department of Earth Sciences, University of Minnesota, Minneapolis, MN 55455, United States; Institute of Global Environmental Change, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
推荐引用方式 GB/T 7714	Wang L.,Brook G.A.,Burney D.A.,et al. The African Humid Period; rapid climate change events; the timing of human colonization; and megafaunal extinctions in Madagascar during the Holocene: Evidence from a 2m Anjohibe Cave stalagmite[J],2019,210.
APA	Wang L..,Brook G.A..,Burney D.A..,Voarintsoa N.R.G..,Liang F..,...&Edwards R.L..(2019).The African Humid Period; rapid climate change events; the timing of human colonization; and megafaunal extinctions in Madagascar during the Holocene: Evidence from a 2m Anjohibe Cave stalagmite.Quaternary Science Reviews,210.
MLA	Wang L.,et al."The African Humid Period; rapid climate change events; the timing of human colonization; and megafaunal extinctions in Madagascar during the Holocene: Evidence from a 2m Anjohibe Cave stalagmite".Quaternary Science Reviews 210(2019).