Abstract

The bathymetric ranges of the same deep-sea (>2000 m) species in the Sea of Japan and outside it are compared. Among 85 deep-sea species of the Sea of Japan mega- and macrofauna, 26 species are known outside the sea at depths greater than 2000 m and 45 species only from the sublittoral and bathyal zones (<2000 m). The remaining 14 species are endemic to the Sea of Japan. The species of the first group, together with eurybathic Sea of Japan endemics (eight species) are classified as pseudoabyssal. The term “pseudoabyssal species” is used here for eurybathic (sublittoral–abyssal or bathyal–abyssal) species, the distribution of which is restricted to a relatively small area in the abyssal, in present case, to the abyssal within the Sea of Japan. The share of pseudoabyssal species in the abyssal basin of the Sea of Japan (62%) is larger than in any other abyssal region. It is assumed that the large share of pseudoabyssal species is the result of local submergence of the sublittoral–bathyal fauna into the abyssal zone of the Sea of Japan. The abyssal basin of the Sea of Japan is distinguished as a biogeographic province within the abyssal biotic zone.

中文翻译：

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滨海底栖物种浸入日本海深渊带

摘要

比较了日本海及其外部相同深海（> 2000 m）物种的测深范围。在日本海的大型和大型动物群的85种深海物种中，有超过26 m的深度在海外已知26种，而仅在近海和海底区域（<2000 m）有45种。其余14种是日本海特有的。第一组的物种，连同日本海特有的特有种（八种），被归为伪深渊。这里的“假深渊物种”一词指的是eurybathic（近海深渊或深海深渊）物种，其分布仅限于深海中较小的区域，目前仅限于日本海内的深海。在日本海的深海盆地中，假深渊物种的份额（62％）比其他任何深渊地区都大。据推测，假深渊物种的很大一部分是由于近海底—贝类动物局部淹没在日本海深海区域的结果。日本海深渊盆地是深海生物带内的一个生物地理省份。