globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13680
论文题名:
Big in the benthos: Future change of seafloor community biomass in a global, body size-resolved model
作者: Yool A.; Martin A.P.; Anderson T.R.; Bett B.J.; Jones D.O.B.; Ruhl H.A.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2017
卷: 23, 期:9
起始页码: 3554
结束页码: 3566
语种: 英语
英文关键词: allometric ; benthic ; ecology ; future ; global ; model ; particulate organic carbon flux ; seafloor
Scopus关键词: Metazoa
英文摘要: Deep-water benthic communities in the ocean are almost wholly dependent on near-surface pelagic ecosystems for their supply of energy and material resources. Primary production in sunlit surface waters is channelled through complex food webs that extensively recycle organic material, but lose a fraction as particulate organic carbon (POC) that sinks into the ocean interior. This exported production is further rarefied by microbial breakdown in the abyssal ocean, but a residual ultimately drives diverse assemblages of seafloor heterotrophs. Advances have led to an understanding of the importance of size (body mass) in structuring these communities. Here we force a size-resolved benthic biomass model, BORIS, using seafloor POC flux from a coupled ocean-biogeochemistry model, NEMO-MEDUSA, to investigate global patterns in benthic biomass. BORIS resolves 16 size classes of metazoans, successively doubling in mass from approximately 1 μg to 28 mg. Simulations find a wide range of seasonal responses to differing patterns of POC forcing, with both a decline in seasonal variability, and an increase in peak lag times with increasing body size. However, the dominant factor for modelled benthic communities is the integrated magnitude of POC reaching the seafloor rather than its seasonal pattern. Scenarios of POC forcing under climate change and ocean acidification are then applied to investigate how benthic communities may change under different future conditions. Against a backdrop of falling surface primary production (−6.1%), and driven by changes in pelagic remineralization with depth, results show that while benthic communities in shallow seas generally show higher biomass in a warmed world (+3.2%), deep-sea communities experience a substantial decline (−32%) under a high greenhouse gas emissions scenario. Our results underscore the importance for benthic ecology of reducing uncertainty in the magnitude and seasonality of seafloor POC fluxes, as well as the importance of studying a broader range of seafloor environments for future model development. © 2017 John Wiley & Sons Ltd
资助项目: The authors are grateful for the input and support provided by colleagues at the National Oceanography Centre in Southampton, in particular to B. Kelly-Gerreyn (now at the Australian Bureau of Meteorology). We would also like to thank the three anonymous referees and our editor, R. Kressman, for their comments and advice which greatly improved the manuscript. The authors gratefully acknowledge the financial support of the Natural Environmental Research Council (NERC), UK, and the European Union Horizon 2020 programme. NERC support was provided by National Capability funding and the UK Earth System Model (UKESM) Long-Term Science Multi-centre programme. EU support was provided by the CRESCENDO project (grant number 641816). Model output used in the production of this work is available from AY (axy@noc.ac.uk).
Citation statistics:
被引频次[WOS]:38   [查看WOS记录]     [查看WOS中相关记录]
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60843
Appears in Collections:影响、适应和脆弱性

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作者单位: National Oceanography Centre, University of Southampton Waterfront Campus, Southampton, United Kingdom

Recommended Citation:
Yool A.,Martin A.P.,Anderson T.R.,et al. Big in the benthos: Future change of seafloor community biomass in a global, body size-resolved model[J]. Global Change Biology,2017-01-01,23(9)
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