DOI: 10.1016/j.quascirev.2016.11.009
Scopus记录号: 2-s2.0-84998910198
论文题名: Community benthic paleoecology from high-resolution climate records: Mollusca and foraminifera in post-glacial environments of the California margin
作者: Myhre S.E. ; Kroeker K.J. ; Hill T.M. ; Roopnarine P. ; Kennett J.P.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2017
卷: 155 起始页码: 179
结束页码: 197
语种: 英语
英文关键词: Deglaciation
; Foraminifera
; Global change
; Mollusca
; Oxygen minimum zones
; Paleoceanography
; Paleoecology
Scopus关键词: Carbon
; Climate change
; Cluster analysis
; Ecology
; Glacial geology
; Sea level
; Deglaciations
; Foraminifera
; Global change
; Mollusca
; Oxygen minimum zone
; Paleoceanography
; Paleoecology
; Molluscs
; Animalia
; Bivalvia
; Foraminifera
; Gastropoda
; Lucinoma aequizonata
; Mollusca
; Rhizaria
英文摘要: Paleoecological reconstructions of past climate are often based on a single taxonomic group with a consistent presence. Less is known about the relationship between multi-taxon community-wide change and climate variability. Here we reconstruct paleoecological change in a Late Quaternary (16.1–3.4 ka) sediment core from the California margin (418 m below sea level) of Santa Barbara Basin (SBB), USA, using Mollusca (Animalia) and Foraminifera (Rhizaria) microfossils. Building upon previous investigations, we use multivariate ordination and cluster analyses to interpret community-scale changes in these distinctly different taxonomic groups across discrete climate episodes. The strongest differences between seafloor biological communities occurred between glacial (prior to Termination IA, 14.7 ka) and interglacial climate episodes. Holocene communities were well partitioned, indicating that sub-millennial oceanographic variability was recorded by these microfossils. We document strong evidence of chemosynthetic trophic webs and sulfidic environments (from gastropod Alia permodesta and bivalve Lucinoma aequizonata), which characterized restricted intervals previously interpreted as well oxygenated (such as the Pre-Bølling Warming). Mollusc records indicate first-order trophic energetic shifts between detrital and chemosynthetically-fixed carbon. Molluscs associated with widely different physiological preferences occur here within single, decadal intervals of sediment, and as such mollusc assemblages may reflect significant inter-decadal oceanographic variability. Foraminifera assemblages provide exceptional records of the sequential, chronological progression of the deglacial climatic and oceanographic events, whereas mollusc assemblages reflect non-chronological similarities in reoccurring communities. Foraminifera taxa that drive community similarity here are also independently recognized as marker species for seafloor hypoxia regimes, which provides support for the idea that oxygenation change is a principal driver of seafloor environmental variability. © 2016 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59367
Appears in Collections: 过去全球变化的重建
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作者单位: Bodega Marine Laboratory, University of California, 2099 Westside Road, Bodega Bay, CA, United States; Department of Ecology and Evolutionary Biology, University of California, Santa Cruz, United States; Department of Earth and Planetary Sciences, University of California, One Shields Avenue, Davis, CA, United States; Institute of Biodiversity Science and Sustainability, California Academy of Sciences, 55 Music Concourse Drive, San Francisco, CA, United States; Department of Earth Sciences and Marine Science Institute, University of California, Santa Barbara, CA, United States
Recommended Citation:
Myhre S.E.,Kroeker K.J.,Hill T.M.,et al. Community benthic paleoecology from high-resolution climate records: Mollusca and foraminifera in post-glacial environments of the California margin[J]. Quaternary Science Reviews,2017-01-01,155