Contribution of the development of the stratification of water to the expansion of dead zone: A sedimentological approach

Spatial characteristics and formation mechanisms of bottom hypoxia zone in the Bohai Sea during summer

“…有机质富集是该区相对稳定的 水动力与沉积环境造成的, 由于该区域夏季水动力较 弱, 黄河、海河、滦河等在丰水期携带的大量陆源有 机物质可能在该区域沉降 [28] . 同时, 稳定的沉积环境 也有利于藻类等海洋生物在沉积物中的累积 [6] . 尽管 目前还难以准确判定沉积物中有机质的来源, 但是可 以判断沉积物中有机质累积与低氧区形成密切相关.…”

Inter- and intraspecific variation in anoxic survival among three bivalve species in intertidal and subtidal areas along the coast of Japan

“…Consequently, the significantly higher tolerance against anoxia demon-strated by V. micra, compared to Manila clams (Fig. 2), may be one of the reasons for the recent dominance of this species in Ariake Bay under severe hypoxia, as suggested by previous studies (Yoshino et al 2007, Orita et al 2015.…”

“…2). Such high tolerance against anoxia may contribute to the recent increase in biomass and species dominance observed in the field, Ariake Bay (Yoshino et al 2007, Orita et al 2015. Although regional comparisons of interspecific differences in bivalve survival has been previously evaluated (Vistisen & Vismann 1997, Yokoyama 2002, Como & Magni 2009, Kanaya 2014, such a marked difference among species has not been observed.…”

“…V. micra is a small sized bivalve that used to be dominant in subtidal muddy areas along the coasts of southern Japan, such as Wakasa Bay, Amakusa, and Tomoe Bay (Tanaka & Kikuchi 1979, Yokoyama & Hayashi 1980), but recent reports of occurrence and dominance of this species are few (Yoshino et al 2007, Orita et al 2015.…”

“…The aim of the present study was to assess the anoxic survival of three infaunal bivalve species, the Manila clam (Ruditapes philippinarum), ark shell (Anadara kagoshimensis), and Veremolpa micra, which are the dominant bivalve species in the intertidal and subtidal muddysandy areas along the coasts of central and southern Japan (Naka mura et al 1997, Yoshino et al 2007, Yurimoto et al 2008, Suzuki et al 2012, Orita et al 2015. The Manila clam and ark shell are also important fisheries commercial species.…”