DOI: 10.1111/gcb.14523
Scopus记录号: 2-s2.0-85058406653
论文题名: Back to the future? Late Holocene marine food web structure in a warm climatic phase as a predictor of trophodynamics in a warmer South-Western Atlantic Ocean
作者: Bas M. ; Briz i Godino I. ; Álvarez M. ; Vales D.G. ; Crespo E.A. ; Cardona L.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2019
卷: 25, 期: 2 起始页码: 404
结束页码: 419
语种: 英语
英文关键词: Eleginops maclovinus
; global warming
; Hunter-Fisher-Gatherer societies
; Merluccius
; sea lion
; shell middens
; Sprattus fuegensis
; Thyrsites atun
Scopus关键词: atmospheric dynamics
; food web
; global warming
; Holocene
; hunter-gatherer
; paleoclimate
; perciform
; pinniped
; sea surface temperature
; troposphere
; Atlantic Ocean
; Atlantic Ocean (West)
; Beagle Channel
; Pacific Ocean
; Pacific Ocean (East)
; Arctocephalus australis
; Eleginops maclovinus
; Merluccius
; Otaria byronia
; Otariidae
; Patellidae
; Phalacrocoracidae
; Phalacrocorax
; Rexea solandri
; Sprattus fuegensis
; Thyrsites atun
英文摘要: Stable carbon and nitrogen isotope ratios in the skeletal elements of both ancient and modern marine species from the Beagle Channel were used to compare the structure of Late Holocene and modern food webs, and predict potential changes as a result of a Sea Surface Temperature (SST) increase in the region. Complementary, ancient and modern shells of limpets and mussels were isotopically analysed to explore changes in the isotopic baseline and compare marine food webs through time after an appropriate correction for baseline shifts. Results confirmed a declining pattern of marine primary productivity during the Late Holocene in the Beagle Channel. In general, the isotopic niches overlapped largely in the ancient food web in comparison to the current marine one, with the exception of that of cormorants (Phalacrocorax sp.). Our data suggest that all the species that have undergone intense human exploitation (Arctocephalus australis, Otaria flavescens and Merluccius sp.) significantly increased their trophic levels. The most important finding of this work was the very high isotopic overlap between snoek (Thyrsites atun) and hake (Merluccius sp.) during the Late Holocene. Increasing SST as a result of global warming could favour the recolonization of the southern South-Western Atlantic Ocean by snoek from the South-Eastern Pacific Ocean, with a potential impact on the landings of the economically important Argentine and Austral hake. These findings highlight the relevance of using zooarchaeological remains for providing predictions about marine food webs changes in the near future. © 2018 John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/117511
Appears in Collections: 气候变化与战略
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Recommended Citation:
Bas M.,Briz i Godino I.,Álvarez M.,et al. Back to the future? Late Holocene marine food web structure in a warm climatic phase as a predictor of trophodynamics in a warmer South-Western Atlantic Ocean[J]. Global Change Biology,2019-01-01,25(2)