期刊
MARINE POLLUTION BULLETIN
卷 135, 期 -, 页码 361-375出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2018.07.004
关键词
Mediterranean Sea; Hypoxia; Eutrophication; Corbula gibba; Body size; Conservation paleobiology
资金
- Austrian Science Fund (FWF) [P24901]
- Slovak Research and Development Agency [APVV 17-0555]
- Slovak Grant Agency [VEGA 0136-15]
- Austrian Science Fund (FWF) [P24901] Funding Source: Austrian Science Fund (FWF)
An increase in the frequency of hypoxia, mucilages, and sediment pollution occurred in the 20th century in the Adriatic Sea. To assess the effects of these impacts on bivalves, we evaluate temporal changes in size structure of the opportunistic bivalve Corbula gibba in four sediment cores that cover the past similar to 500 years in the northern, eutrophic part and similar to 10,000 years in the southern, mesotrophic part of the Gulf of Trieste. Assemblages exhibit a stable size structure during the highstand phase but shift to bimodal distributions and show a significant increase in the 95th percentile size during the 20th century. This increase in size by 2-3 mm is larger than the northward size increase associated with the transition from mesotrophic to eutrophic habitats. It coincides with increasing concentrations of total organic carbon and nitrogen, and can be related to enhanced food supply and by the tolerance of C. gibba to hypoxia.
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