气候变化领域集成服务门户(CCPortal): Temporal and population trends in human exploited pinnipeds from Tierra del Fuego

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DOI	10.1016/j.palaeo.2020.109804
	Temporal and population trends in human exploited pinnipeds from Tierra del Fuego
	Nye J.W.; Zangrando A.F.J.; Martinoli M.P.; Fogel M.L.
发表日期	2020
ISSN	0031-0182
卷号	554
英文摘要	Archaeological sites on the coast of Tierra del Fuego, Argentina, provide a biogeochemical record that can inform us about those ecological dynamics. An abundance of southern fur seal (Arctocephalus australis) and southern sea lion (Otaria flavescens) remains provide a valuable resource to reconstruct ancient and modern food webs. To quantify ecological relationships, we measured bulk stable isotope ratios from bone collagen in otariids and other associated animals, several of which are potential otariid prey. Variations in bulk stable isotope ratios of carbon (δ13C) and nitrogen (δ15N) are linked to potential dietary differences and habitat specialization between coastal areas or the open ocean in populations ranging in age from 7000 cal. Years BP to modern. We observed increases in the variability of these isotopic compositions over time, which suggests a diversity in the diets and habitats of otariids. Shifts in marine food webs occurred during the transition from subsistence hunting of otariids to industrial hunting and expanded human influence. We conclude that direct human influences, such as hunting and habitat alteration, were the major drivers of ecological change in southern South American marine ecosystems. © 2020 The Authors
英文关键词	Anthropocene; Holocene; Organic geochemistry; South America; Stable isotopes
语种	英语
scopus关键词	collagen; marine ecosystem; pinniped; population cycle; stable isotope; temporal analysis; trend analysis; Argentina; Tierra del Fuego [(PRV) Argentina]; Animalia; Arctocephalus; Arctocephalus australis; Otaria byronia; Otariidae; Pinnipedia
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150440
作者单位	Riverside EDGE Lab, Department of Earth Sciences, Univeristy of California, 1242B Geology Building, 900 University Ave., Riverside, CA 92521, United States; Centro Austral de Investigaciones Científicas (CADIC- CONICET), Bernardo Houssay 200, Ushuaia, Tierra del Fuego, Argentina
推荐引用方式 GB/T 7714	Nye J.W.,Zangrando A.F.J.,Martinoli M.P.,et al. Temporal and population trends in human exploited pinnipeds from Tierra del Fuego[J],2020,554.
APA	Nye J.W.,Zangrando A.F.J.,Martinoli M.P.,&Fogel M.L..(2020).Temporal and population trends in human exploited pinnipeds from Tierra del Fuego.Palaeogeography, Palaeoclimatology, Palaeoecology,554.
MLA	Nye J.W.,et al."Temporal and population trends in human exploited pinnipeds from Tierra del Fuego".Palaeogeography, Palaeoclimatology, Palaeoecology 554(2020).