Assessment of decadal changes in the tidepool fish assemblage of Danjo Islands in the northern East China Sea
Assessment of decadal changes in the tidepool fish assemblage of Danjo Islands in the northern East China Sea
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DOI：
10.1007/s12526-022-01265-5
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发表时间：
2022-04-01
影响因子：
1.6
通讯作者：
Tokeshi, Mutsunori
中科院分区：
文献类型：
--
作者：
Arakaki, Seiji;Tokeshi, Mutsunori
潮汐塘是沿海环境的一个主要组成部分，可用于评估各种因素对海洋环境的潜在影响。丹霍群岛是位于西太平洋东中国海北部的一组孤立无人居住的岛屿，我们研究了该群岛的潮汐鱼类群落结构。2017-2018年标准化定量鱼类采样和补充目视观察显示，丹洲群岛的潮汐池鱼组合以Blenniidae为优势种，物种组成明显不同于日本南部(琉球群岛和九州地区)的地点，而所有物种都是非特有物种，即在日本南部广泛分布和常见。与1970年代的调查相比，丹霍群岛潮汐池鱼的种类组成似乎与过去半个世纪在南部地区观察到的模式略有变化。鉴于人类活动对群岛沿海环境的影响很小或根本没有影响，所观察到的潮池鱼类群落的变化可能主要是由于当前环境变化下的时间变化。
Tidepools are a major component of coastal environments and useful for evaluating the potential impacts of various factors on marine environments. We have investigated the structure of tidepool fish assemblages on the Danjo Islands, an isolated and uninhabited group of islands located in the northern East China Sea in the western Pacific. Standardised quantitative fish sampling and supplementary visual observation in 2017-2018 revealed that tidepool fish assemblages on the Danjo Islands were characterised by the dominance of Blenniidae, and that species composition was clearly distinct from sites in southern Japan (Ryukyu archipelagos and Kyushu region), while all species were non-endemic, i.e. widely distributed and common in southern Japan. Compared to the survey in the 1970s, the species composition of tidepool fishes on the Danjo Islands appeared to have shifted slightly towards the pattern observed in southern regions during the past half century. Given little or no anthropogenic impact on coastal environments of the Islands, the observed changes in the tidepool fish community are likely to result mainly from temporal variations under the prevailing environmental changes.