DOI: 10.1016/j.palaeo.2013.12.014
论文题名: Adélie penguin dietary remains reveal Holocene environmental changes in the western Ross Sea (Antarctica)
作者: Lorenzini S. ; Baroni C. ; Baneschi I. ; Salvatore M.C. ; Fallick A.E. ; Hall B.L.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2014
卷: 395 起始页码: 21
结束页码: 28
语种: 英语
英文关键词: Adélie penguin
; Ornithogenic soil
; Paleoceanography
; Paleoenvironment
; Stable isotope
英文摘要: Carbon and nitrogen stable isotope analyses were performed on modern and Holocene Adélie penguin guano samples collected from ornithogenic soils along the Scott Coast (Southern Victoria Land, Antarctica), from Cape Irizar to Dunlop Island, and at Cape Bird (Ross Island). Guano samples also were sieved and sorted under stereomicroscope in order to select penguin dietary remains, such as fish bones and otoliths. Carbon and nitrogen stable isotope composition, coupled with the taxonomic identification of fish otoliths from Scott Coast Holocene samples, indicated a mainly fish-based diet for this area, with Pleuragramma antarcticum as the most eaten prey throughout the investigated period (from 390cal BP to ca 7300cal BP). The isotopic values of Ross Island samples (from modern to 3850cal BP) showed a krill consumption increase in the samples younger than 2000cal BP, with the maximum in modern samples. Scott Coast and Ross Island Holocene samples showed δ13C and δ15N trends similar to those previously published from Terra Nova Bay (northern Victoria Land), whereas modern samples from Ross Island have similar δ15N composition but different δ13C values. This δ13C divergence started at ca 2000 BP and follows the abandonment of the Scott Coast colonies. The δ13C trend observed in Ross Island and Terra Nova Bay samples and the abandonment of the Scott Coast colonies could suggest the stability and the persistence of the previous oceanographic conditions (i.e. polynya) for the Terra Nova Bay area and the establishment of new conditions for water circulation in the Southern Ross Sea since ~2000 BP when persistent sea-ice sealed the Scott Coast. © 2013 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69481
Appears in Collections: 过去全球变化的重建
There are no files associated with this item.
作者单位: Dipartimento di Scienze della Terra, Università degli Studi di Pisa, Via S. Maria 53, 56126 Pisa, Italy; Istituto di Geoscienze e Georisorse, Consiglio Nazionale delle Ricerche, Via G. Moruzzi 1, 56124 Pisa, Italy; Scottish Universities Environmental Research Centre, East Kilbride G75 0QF, Scotland, United Kingdom; School of Earth and Climate Sciences and the Climate Change Institute, University of Maine, Orono, ME 04469, United States
Recommended Citation:
Lorenzini S.,Baroni C.,Baneschi I.,et al. Adélie penguin dietary remains reveal Holocene environmental changes in the western Ross Sea (Antarctica)[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2014-01-01,395