Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.14832 |
Temporal and spatial trends in marine carbon isotopes in the Arctic Ocean and implications for food web studies | |
de la Vega, Camille1; Jeffreys, Rachel M.1; Tuerena, Robyn2; Ganeshram, Raja2; Mahaffey, Claire1 | |
2019-10-10 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2019 |
文章类型 | Article;Early Access |
语种 | 英语 |
国家 | England; Scotland |
英文摘要 | The Arctic is undergoing unprecedented environmental change. Rapid warming, decline in sea ice extent, increase in riverine input, ocean acidification and changes in primary productivity are creating a crucible for multiple concurrent environmental stressors, with unknown consequences for the entire arctic ecosystem. Here, we synthesized 30 years of data on the stable carbon isotope (delta C-13) signatures in dissolved inorganic carbon (delta C-13-DIC; 1977-2014), marine and riverine particulate organic carbon (delta C-13-POC; 1986-2013) and tissues of marine mammals in the Arctic. delta C-13 values in consumers can change as a result of environmentally driven variation in the delta C-13 values at the base of the food web or alteration in the trophic structure, thus providing a method to assess the sensitivity of food webs to environmental change. Our synthesis reveals a spatially heterogeneous and temporally evolving delta C-13 baseline, with spatial gradients in the delta C-13-POC values between arctic shelves and arctic basins likely driven by differences in productivity and riverine and coastal influence. We report a decline in delta C-13-DIC values (-0.011 parts per thousand per year) in the Arctic, reflecting increasing anthropogenic carbon dioxide (CO2) in the Arctic Ocean (i.e. Suess effect), which is larger than predicted. The larger decline in delta C-13-POC values and delta C-13 in arctic marine mammals reflects the anthropogenic CO2 signal as well as the influence of a changing arctic environment. Combining the influence of changing sea ice conditions and isotopic fractionation by phytoplankton, we explain the decadal decline in delta C-13-POC values in the Arctic Ocean and partially explain the delta C-13 values in marine mammals with consideration of time-varying integration of delta C-13 values. The response of the arctic ecosystem to ongoing environmental change is stronger than we would predict theoretically, which has tremendous implications for the study of food webs in the rapidly changing Arctic Ocean. |
英文关键词 | base of the food web dissolved inorganic carbon isoscape marine mammals particulate organic matter sea ice decline Suess effect delta C-13 |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000489580400001 |
WOS关键词 | PARTICULATE ORGANIC-MATTER ; BERING-SEA ; FATTY-ACID ; TROPHIC RELATIONSHIPS ; STABLE CARBON ; PRIMARY PRODUCTIVITY ; COASTAL EROSION ; MACKENZIE RIVER ; CANADA BASIN ; WATER |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/187617 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Univ Liverpool, Sch Environm Sci, Liverpool L69 3GP, Merseyside, England; 2.Univ Edinburgh, Sch Geosci, Edinburgh, Midlothian, Scotland |
推荐引用方式 GB/T 7714 | de la Vega, Camille,Jeffreys, Rachel M.,Tuerena, Robyn,et al. Temporal and spatial trends in marine carbon isotopes in the Arctic Ocean and implications for food web studies[J]. GLOBAL CHANGE BIOLOGY,2019. |
APA | de la Vega, Camille,Jeffreys, Rachel M.,Tuerena, Robyn,Ganeshram, Raja,&Mahaffey, Claire.(2019).Temporal and spatial trends in marine carbon isotopes in the Arctic Ocean and implications for food web studies.GLOBAL CHANGE BIOLOGY. |
MLA | de la Vega, Camille,et al."Temporal and spatial trends in marine carbon isotopes in the Arctic Ocean and implications for food web studies".GLOBAL CHANGE BIOLOGY (2019). |
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