期刊
MARINE POLLUTION BULLETIN
卷 71, 期 1-2, 页码 179-189出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2013.03.018
关键词
Food web; Stable isotope ratio; Anthropogenic change; Tidal flat; Macrozoobenthos; Eutrophication
资金
- KAKENHI, JSPS [21770013]
- Grants-in-Aid for Scientific Research [21770013] Funding Source: KAKEN
Temporal changes in benthic food web structure were analyzed in an artificial tidal flat in inner Tokyo Bay, Japan, using carbon and nitrogen stable isotope ratios (delta C-13 and delta N-15). Microphytobenthos were the most important food sources of macrozoobenthos, due to high microphytobenthic biomass on the tidal flat, while phytoplankton in canal water (canal POMPP), terrestrial materials from urban surface runoff (canal POMTM), and marsh plants were less important. Dietary contribution of microphytobenthos was highest in April to June, while decreased towards December owing to the supply of canal POMPP and canal POMTM following red tides and heavy rainfall events in summer to fall. Temporal changes in delta N-15 (Delta delta N-15) of consumer corresponded well to the N-15-enrichment in canal POMPP in summer. A meta-analysis showed that the consumer-Delta delta N-15 was considerably larger in inner Tokyo Bay than those in other estuaries, which may be a specific characteristic of benthic food web in highly urbanized estuaries. (C) 2013 Elsevier Ltd. All rights reserved.
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