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globalchange > 过去全球变化的重建

DOI:	10.1371/journal.pone.0101506
论文题名:	Overfishing and the Replacement of Demersal Finfish by Shellfish: An Example from the English Channel
作者:	Carlotta Molfese; Doug Beare; Jason M. Hall-Spencer
刊名:	PLOS ONE
ISSN:	1932-6203
出版年:	2014
发表日期:	2014-7-10
卷:	9, 期:7
语种:	英语
英文关键词:	Fisheries science ; Food web structure ; Marine ecosystems ; Invertebrates ; Sharks ; Marine ecology ; Crabs ; Malacology
英文摘要:	The worldwide depletion of major fish stocks through intensive industrial fishing is thought to have profoundly altered the trophic structure of marine ecosystems. Here we assess changes in the trophic structure of the English Channel marine ecosystem using a 90-year time-series (1920–2010) of commercial fishery landings. Our analysis was based on estimates of the mean trophic level (mTL) of annual landings and the Fishing-in-Balance index (FiB). Food webs of the Channel ecosystem have been altered, as shown by a significant decline in the mTL of fishery landings whilst increases in the FiB index suggest increased fishing effort and fishery expansion. Large, high trophic level species (e.g. spurdog, cod, ling) have been increasingly replaced by smaller, low trophic level fish (e.g. small spotted catsharks) and invertebrates (e.g. scallops, crabs and lobster). Declining trophic levels in fisheries catches have occurred worldwide, with fish catches progressively being replaced by invertebrates. We argue that a network of fisheries closures would help rebalance the trophic status of the Channel and allow regeneration of marine ecosystems.
URL:	http://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0101506&type=printable
Citation statistics:
资源类型:	期刊论文
标识符:	http://119.78.100.158/handle/2HF3EXSE/19541
Appears in Collections:	过去全球变化的重建影响、适应和脆弱性科学计划与规划气候变化与战略全球变化的国际研究计划气候减缓与适应气候变化事实与影响

Files in This Item:

File Name/ File Size	Content Type	Version	Access	License
10.1371journal.pone.0101506.PDF（1422KB）	期刊论文	作者接受稿	开放获取	CC BY-NC-SA	View Download

作者单位:

Marine Biology and Ecology Research Centre, Plymouth University, Plymouth, United Kingdom;Worldfish, Batu Maung, Penang, Malaysia;Marine Biology and Ecology Research Centre, Plymouth University, Plymouth, United Kingdom

Recommended Citation:

Carlotta Molfese,Doug Beare,Jason M. Hall-Spencer. Overfishing and the Replacement of Demersal Finfish by Shellfish: An Example from the English Channel[J]. PLOS ONE,2014-01-01,9(7)

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