Fate of benthic invertebrates during seabed liquefaction: quantitative comparison of living organism body density with liquefied substrate density
Fate of benthic invertebrates during seabed liquefaction: quantitative comparison of living organism body density with liquefied substrate density
复制标题
海底液化过程中底栖无脊椎动物的命运：生物体密度与液化基质密度的定量比较
DOI：
10.1016/j.ecss.2019.04.025
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
K.
中科院分区：
文献类型：
--
作者：
Seike;K.;Sassa;S.;Kubota;K. and Shirai;K.
地震造成的地面震动和风暴期间海底的波浪负荷可使海底沉积物发生变化，突出表明海底生态系统可因基底的改变而受到重大影响。为了研究生物在液化基质中的外源强迫行为，我们测量了从日本沿海地区采集的底栖生物（包括双壳类、腹足类、环节动物和棘皮动物）的体密度，并将其与液化基质密度进行了比较。大多数底栖生物个体的测量密度小于液化基质的密度，表明这些物种会在液化基质中向上漂浮。相比之下，一些个体的三个物种，包括蚬（蚬），Stimpson的硬壳蛤（Mercenaria stimpsoni），和沙美元（Scaphechinus mirabilis）有较高的身体密度比液化基板的密度。预计这些较重的底栖无脊椎动物将在底质液化期间向下移动。这些研究结果表明，身体密度可能决定每种底栖物种对海底液化的反应，迫使它们根据身体密度向上或向下移动。
Shaking of the ground caused by earthquakes and wave loading on the seafloor during storms can liquefy seabed sediments, highlighting that seabed ecosystems can be substantially affected by modification of the substrate. To investigate exogenous-forced behavior of organisms in liquefied substrates we measured the body density of benthic organisms including bivalves, gastropods, annelids, and echinoderms collected from coastal areas of Japan, and compared them with the liquefied substrate density. The measured density for most benthic individuals was less than that of the liquefied substrate, suggesting that these species would float upwards in liquefied substrates. In contrast, a few individuals of three species including the corbicula clam (Corbicula japonica), Stimpson's hard clam (Mercenaria stimpsoni), and the sand dollar (Scaphechinus mirabilis) had higher body densities than the density of the liquefied substrate. These heavier benthic invertebrates would be expected to move downward during liquefaction of the substrate. These findings indicate that body density may determine the response of each benthic species to seabed liquefaction, forcing them to move upward or downward depending on their body density.