气候变化领域集成服务门户(CCPortal): Before; during and after megafaunal extinctions: Human impact on Pleistocene-Holocene trophic networks in South Patagonia

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DOI	10.1016/j.quascirev.2020.106696
	Before; during and after megafaunal extinctions: Human impact on Pleistocene-Holocene trophic networks in South Patagonia
	Pires M.M.; Rindel D.; Moscardi B.; Cruz L.R.; Guimarães P.R.; Jr.; dos Reis S.F.; Perez S.I.
发表日期	2020
ISSN	0277-3791
卷号	250
英文摘要	Worldwide extinctions of large terrestrial vertebrates in the late Pleistocene provide insight on how humans reshape ecological communities. Understanding the ecological causes and consequences of megafaunal extinctions requires integrating approaches to reconstruct the ecological communities from the past. Here, we combined archeological and paleontological evidence with network analyses to understand the changes in ecological communities from late Pleistocene to the Holocene in South Patagonia, the last continental region where the encounter between humans and extinct megafauna occurred. The zooarcheological record suggests humans would have interacted mainly with large-bodied species, which comprise a small subset of the available prey. Accordingly, using network reconstructions and structural analyses, we found that human arrival would have produced minor changes in the overall structure of trophic networks. However, those few novel interactions established by humans would have created multiple indirect paths among megafaunal species. Indirect paths are the route for indirect effects such as competition and increase the vulnerability of interaction networks to perturbations. After the extinctions of most of the megafauna, the impoverished network became structurally simpler and densely connected. Our reconstructions of past trophic networks show that multiple indirect effects, potentially contributing to extinctions, can emerge even from a limited number of novel interactions and illustrate how network organization can affect and be affected by extinctions events. © 2020 Elsevier Ltd
英文关键词	Ecological paleocommunities; Faunal diversity; Food webs; Human arrival; Indirect effects; Late quaternary extinctions; Southern south America
语种	英语
scopus关键词	Geology; Natural sciences; Indirect effects; Indirect paths; Interaction networks; Late Pleistocene; Network organization; Network reconstruction; Paleontological evidence; Trophic network; Ecosystems; Vertebrata
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/151220
作者单位	Departamento de Biologia Animal, Instituto de Biologia, Universidade Estadual de Campinas, Campinas, São Paulo, 13083-862, Brazil; CONICET, Instituto Nacional de Antropología y Pensamiento Latinoamericano, Ciudad Autónoma de Buenos Aires, C1426BJN, Argentina; División Antropología, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, La Plata, 1900, Argentina; Departamento de Ecologia, Instituto de Biociências, Universidade de São Paulo, São Paulo, 05508-090, Brazil; CONICET, División de Antropología, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, La Plata, 1900, Argentina
推荐引用方式 GB/T 7714	Pires M.M.,Rindel D.,Moscardi B.,et al. Before; during and after megafaunal extinctions: Human impact on Pleistocene-Holocene trophic networks in South Patagonia[J],2020,250.
APA	Pires M.M..,Rindel D..,Moscardi B..,Cruz L.R..,Guimarães P.R..,...&Perez S.I..(2020).Before; during and after megafaunal extinctions: Human impact on Pleistocene-Holocene trophic networks in South Patagonia.Quaternary Science Reviews,250.
MLA	Pires M.M.,et al."Before; during and after megafaunal extinctions: Human impact on Pleistocene-Holocene trophic networks in South Patagonia".Quaternary Science Reviews 250(2020).