Invertebrate Fauna Associated with Floating Sargassum horneri (Fucales: Sargassaceae) in the East China Sea
Invertebrate Fauna Associated with Floating Sargassum horneri (Fucales: Sargassaceae) in the East China Sea
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DOI：
10.12782/sd.18.1.075
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发表时间：
2013-05-01
影响因子：
--
通讯作者：
Ajisaka, Tetsuro
中科院分区：
文献类型：
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作者：
Abe, Hiroshi;Komatsu, Teruhisa;Ajisaka, Tetsuro
本文报道了与漂浮的霍氏马尾藻（Sargassum horneri（Turner）C.）Agardh，1820在东海进行了生态学和地理学调查。漂浮的藻筏仅由S。2011年2月，在东海的16个站位，在调查船（R/V）Tansei-Maru巡航期间收集了horneri。在16个监测站中的14个监测站，共获得53个筏进行动物区系调查。除鱼卵外，在漂浮的藻类上还发现了10种无脊椎动物。在所采集的植物性动物中，桡足类的数量最丰富（80%），其次是蔓足类（15%），端足类（4%）和其他（1%）。藻类的区系多样性与藻重相关。各站位的区系多样性差异显著，以东海最北部的区系多样性最高。动物的密度和丰度在靠近黑潮的地区最高。考虑到黑潮的流向和从周围水域迁移到浮游藻类上的蔓足类的密度，大多数浮游S。horneri可能起源于东海南部。另一方面，在东海最北部采集的马尾藻筏可能起源于中国东部沿海。在漂浮的马尾藻上发现的大多数动物都是在原地的木筏上完成生命周期的浮游生物。典型的海岸动物，包括gammaridean和caprellidean端足类，tanaidaceans，线虫，腹足类，多毛类，盐螨，苔藓虫，水螅虫，也从漂浮的马尾藻，但只是偶尔和他们的密度相当低。这些事实表明，通过马尾藻筏底栖栖息地之间的扩散事件是相对罕见的。
The invertebrate fauna associated with floating Sargassum horneri (Turner) C. Agardh, 1820 in the East China Sea was investigated in terms of ecology and biogeography. Floating algal rafts consisting of only S. horneri were collected at 16 stations in the East China Sea during a cruise of research vessel (R/V) Tansei-Maru in February, 2011. A total of 53 rafts were obtained for faunal investigations at 14 of the 16 stations. In addition to fish eggs, 10 invertebrate taxa were found on the floating algae. Of the collected phytal animals, harpacticoid copepods were most abundant in terms of number (80%), followed by cirripedes (15%), amphipods (4%), and others (1%). The faunal diversity on the algae was correlated to the algal weight. The faunal diversity differed significantly between stations and was highest in the northernmost part of the East China Sea. Density and abundance of animals were highest in areas close to the Kuroshio Current. Considering the direction of flow of the Kuroshio Current and the density of cirripedes immigrating from the surrounding water onto the floating algae, most of the floating S. horneri possibly originated in the southern part of the East China Sea. On the other hand, the Sargassum rafts collected in the northernmost part of the East China Sea could have originated from the coast of eastern China. Most of the animals found on the floating Sargassum were pelagic taxa that complete their life cycles on the rafts in situ. Typical coastal animals, including gammaridean and caprellidean amphipods, tanaidaceans, nematodes, gastropods, polychaetes, halacarid mites, bryozoans, and hydrozoans, were also obtained from the floating Sargassum, but only occasionally and their densities were quite low. These facts suggest that dispersal events among benthic habitats via Sargassum rafts are relatively rare.