First insights into macrofaunal composition from the SokhoBio expedition (Sea of Okhotsk, Bussol Strait and northern slope of the Kuril-Kamchatka Trench)
First insights into macrofaunal composition from the SokhoBio expedition (Sea of Okhotsk, Bussol Strait and northern slope of the Kuril-Kamchatka Trench)
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DOI：
10.1016/j.dsr2.2018.05.022
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发表时间：
2018-08-01
影响因子：
3
通讯作者：
Stransky, B.
中科院分区：
文献类型：
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作者：
Brandt, A.;Alalykina, I.;Stransky, B.
大型底栖动物（46，343种无脊椎动物，41个分类群）是在考察SokhoBio（鄂霍次克海生物多样性研究）期间由RV Akademik M.A. 2015年的拉夫连季耶夫。在鄂霍次克海千岛盆地（16个站）、布索尔海峡（2个站）和千岛-堪察加海沟（KKT）西坡（4个站）的半深海和深海深度从1 696米到4 798米不等的总共11个地点和22个站进行了取样。多毛纲的出现频率最高，有17,546个个体，其次是桡足纲，有14,099个个体（等足类5625个，端足类3887个，端足类3225个，角类1269个，糠虾类90个），桡足纲，有4679个个体。和双壳纲（Bivalvia，3999 ind.）个体数量介于3-10站的140 - 7-3站的6383之间。各站位的种类数以3-10站位最少（4种），27站位最多（31种），其中以等足目占40%，端足目占27%，Tanaidacea占23%，Cumacea占9%，糠虾占1%。在3-10号站，没有对一只过螨进行采样。等足类在大多数站点中占主导地位，特别是在千岛盆地的深海站点。端足类出现在较高的数字在布索尔海峡在网站8以及在太平洋站9-7。在SokhoBio地区，所研究的大型底栖动物分布非常零散，就多样性和组成而言，千岛海盆的深海底栖动物处于所研究的相邻深海区（半孤立的日本海和千岛-堪察加海沟地区的开阔深海平原）之间的中间状态。
Macrofauna (46,343 invertebrates from 41 taxa) were collected by means of a camera-epibenthic sledge (CEBS) during the expedition SokhoBio (Sea of Okhotsk Biodiversity Studies) on board of the RV Akademik M.A. Lavrentyev in 2015. In total 11 sites and 22 stations were sampled at bathyal and abyssal depths ranging from 1696 m to 4798 m in the Kuril Basin of the Sea of Okhotsk (16 stations), the Bussol Strait (two stations) and western slope of the Kuril-Kamchatka Trench (KKT) (four stations). Polychaetes occurred most frequently in the samples with 17,546 individuals, followed by Peracarida with 14,099 individuals (5625 isopods, 3887 amphipods, 3225 tanaids, 1269 cumaceans, and 90 mysids), Copepoda (4679 ind.) and Bivalvia (3999 ind.).Numbers of individuals ranged between 140 at station 3-10-6383 at station 7-3. The numbers of taxa per station were smallest at station 3-10 (4 taxa) and highest at station 2-7 (31 taxa).Peracarida were the most common malacostracan crustaceans recorded, with Isopoda comprising 40% of all peracarids within this fraction, followed by Amphipoda with 27%, Tanaidacea with 23%, Cumacea with 9% and Mysida with 1%. At station 3-10, not a single peracarid was sampled. Isopoda dominated most of the stations, especially in the abyssal sites of the Kuril Basin. Amphipoda occurred in higher numbers in the Bussol Strait at site 8 as well as at Pacific station 9-7. In the SokhoBio area, studied macrofauna was distributed very patchily.In terms of diversity and composition the abyssal macrofauna of the Kuril Basin shows an intermediate state between the adjacent studied abyssal areas: the semi-isolated Sea of Japan and the open abyssal plain of the Kuril-Kamchatka Trench (KKT) area.