DOI: 10.1111/gcb.14291
Scopus记录号: 2-s2.0-85049500840
论文题名: Contribution of sea ice microbial production to Antarctic benthic communities is driven by sea ice dynamics and composition of functional guilds
作者: Wing S.R. ; Leichter J.J. ; Wing L.C. ; Stokes D. ; Genovese S.J. ; McMullin R.M. ; Shatova O.A.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期: 8 起始页码: 3642
结束页码: 3653
语种: 英语
英文关键词: Antarctica
; climate change
; food web
; organic matter
; sea ice
; sea ice algae
Scopus关键词: alga
; benthos
; climate change
; ecosystem function
; food web
; microbial activity
; MODIS
; organic matter
; sea ice
; secondary production
; Antarctica
; East Antarctica
; McMurdo Sound
; algae
英文摘要: Organic matter produced by the sea ice microbial community (SIMCo) is an important link between sea ice dynamics and secondary production in near-shore food webs of Antarctica. Sea ice conditions in McMurdo Sound were quantified from time series of MODIS satellite images for Sept. 1 through Feb. 28 of 2007–2015. A predictable sea ice persistence gradient along the length of the Sound and evidence for a distinct change in sea ice dynamics in 2011 were observed. We used stable isotope analysis (δ13C and δ15N) of SIMCo, suspended particulate organic matter (SPOM) and shallow water (10–20 m) macroinvertebrates to reveal patterns in trophic structure of, and incorporation of organic matter from SIMCo into, benthic communities at eight sites distributed along the sea ice persistence gradient. Mass-balance analysis revealed distinct trophic architecture among communities and large fluxes of SIMCo into the near-shore food web, with the estimates ranging from 2 to 84% of organic matter derived from SIMCo for individual species. Analysis of patterns in density, and biomass of macroinvertebrate communities among sites allowed us to model net incorporation of organic matter from SIMCo, in terms of biomass per unit area (g/m2), into benthic communities. Here, organic matter derived from SIMCo supported 39 to 71 per cent of total biomass. Furthermore, for six species, we observed declines in contribution of SIMCo between years with persistent sea ice (2008–2009) and years with extensive sea ice breakout (2012–2015). Our data demonstrate the vital role of SIMCo in ecosystem function in Antarctica and strong linkages between sea ice dynamics and near-shore secondary productivity. These results have important implications for our understanding of how benthic communities will respond to changes in sea ice dynamics associated with climate change and highlight the important role of shallow water macroinvertebrate communities as sentinels of change for the Antarctic marine ecosystem. © 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/110319
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Department of Marine Science, University of Otago, Dunedin, New Zealand; Scripps Institution of Oceanography, University of California at San Diego, La Jolla, CA, United States
Recommended Citation:
Wing S.R.,Leichter J.J.,Wing L.C.,et al. Contribution of sea ice microbial production to Antarctic benthic communities is driven by sea ice dynamics and composition of functional guilds[J]. Global Change Biology,2018-01-01,24(8)