Earth Science Institute, Slovak Academy of Sciences, Dúbravska cesta 9, 84005 Bratislava, Slovakia.
Earth Science Institute, Slovak Academy of Sciences, Dúbravska cesta 9, 84005 Bratislava, Slovakia.
Mar Pollut Bull. 2018 Oct;135:361-375. doi: 10.1016/j.marpolbul.2018.07.004. Epub 2018 Jul 19.
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 ~500 years in the northern, eutrophic part and ~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.
20 世纪，亚得里亚海的缺氧、黏液和沉积物污染频率增加。为了评估这些影响对双壳类动物的影响，我们评估了在过去约 500 年的时间里，在塔兰托湾北部富营养化地区和南部中营养化地区的四个沉积物岩芯中，机会主义双壳类贻贝 Corbula gibba 的大小结构的时间变化。在高水位阶段，组合表现出稳定的大小结构，但在 20 世纪，它们转变为双峰分布，并显示出 95%分位数大小的显著增加。这种大小增加 2-3 毫米比从中营养到富营养生境的过渡引起的大小向北增加还要大。这与总有机碳和氮浓度的增加相吻合，并且可以与食物供应的增加以及 C. gibba 对缺氧的耐受性有关。
