Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.14560 |
Long-term dietary shift and population decline of a pelagic seabird-A health check on the tropical Atlantic? | |
Reynolds, S. James1,2; Hughes, B. John1,2; Wearn, Colin P.3; Dickey, Roger C.2; Brown, Judith4; Weber, Nicola L.4,5; Weber, Sam B.4,5; Paiva, Vitor H.6; Ramos, Jaime A.6 | |
2019-04-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY
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ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2019 |
卷号 | 25期号:4页码:1383-1394 |
文章类型 | Article |
语种 | 英语 |
国家 | England; Ascension Isl; Portugal |
英文摘要 | In the face of accelerating ecological change to the world's oceans, seabirds are some of the best bio-indicators of marine ecosystem function. However, unravelling ecological changes that pre-date modern monitoring programmes remains challenging. Using stable isotope analysis of feathers and regurgitants collected from sooty terns (Onychoprion fuscatus) nesting at a major Atlantic colony, we reconstructed a long-term dietary time series from 1890 to the present day and show that a significant dietary shift occurred during the second half of the twentieth century coinciding with an apparent population collapse of approximately 84%. After correcting for the "Suess Effect," delta C-13 in feathers declined by similar to 1.5 parts per thousand and delta N-15 by similar to 2 parts per thousand between the 1890s and the present day, indicating that birds changed their diets markedly over the period of population decline. Isotopic niches were equally wide before and after the population collapse but isotopic mixing models suggest that birds have grown ever more reliant on nutrient-poor squid and invertebrates as teleost fish have declined in availability. Given that sooty terns rely heavily on associations with sub-surface predators such as tuna to catch fish prey, the rapid expansion of industrialized fisheries for these species over the same period seems a plausible mechanism. Our results suggest that changes to marine ecosystems over the past 60 years have had a dramatic impact on the ecology of the most abundant seabird of tropical oceans, and highlight the potentially pervasive consequences of large predatory fish depletion on marine ecosystem function. |
英文关键词 | Ascension Island bio-indicators carbon-13 marine ecosystem function nitrogen-15 Onychoprion fuscatus sooty tern South Atlantic stable isotope |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000461817500015 |
WOS关键词 | ASCENSION-ISLAND ; ONYCHOPRION-FUSCATUS ; STABLE-ISOTOPES ; DELTA-C-13 ; FISH ; FOOD ; DELTA-N-15 ; VALUES ; OCEAN ; TUNA |
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/17541 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Univ Birmingham, Coll Life & Environm Sci, Sch Biosci, Ctr Ornithol, Birmingham, W Midlands, England; 2.AOS, Prince Consort Lib, Aldershot, Hants, England; 3.RAFOS, High Wycombe, Bucks, England; 4.AIGCFD, Georgetown, Ascension Isl; 5.Univ Exeter, Coll Life & Environm Sci, Ctr Ecol & Conservat, Biosci, Penryn, Cornwall, England; 6.Univ Coimbra, Marine & Environm Sci Ctr, MARE, Dept Life Sci, Coimbra, Portugal |
推荐引用方式 GB/T 7714 | Reynolds, S. James,Hughes, B. John,Wearn, Colin P.,et al. Long-term dietary shift and population decline of a pelagic seabird-A health check on the tropical Atlantic?[J]. GLOBAL CHANGE BIOLOGY,2019,25(4):1383-1394. |
APA | Reynolds, S. James.,Hughes, B. John.,Wearn, Colin P..,Dickey, Roger C..,Brown, Judith.,...&Ramos, Jaime A..(2019).Long-term dietary shift and population decline of a pelagic seabird-A health check on the tropical Atlantic?.GLOBAL CHANGE BIOLOGY,25(4),1383-1394. |
MLA | Reynolds, S. James,et al."Long-term dietary shift and population decline of a pelagic seabird-A health check on the tropical Atlantic?".GLOBAL CHANGE BIOLOGY 25.4(2019):1383-1394. |
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