Tropical intertidal seagrass beds as fish habitat: Similarities between fish assemblages of intertidal and subtidal seagrass beds in the Philippines
Tropical intertidal seagrass beds as fish habitat: Similarities between fish assemblages of intertidal and subtidal seagrass beds in the Philippines
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热带潮间带海草床作为鱼类栖息地：菲律宾潮间带和潮下海草床鱼类组合的相似性
DOI：
10.1016/j.ecss.2021.107245
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Horinouchi M
中科院分区：
文献类型：
--
作者：
Espadero ADA;Nakamura Y;Uy WH;Horinouchi M
热带潮间带海草床最近被确定为多种鱼类的觅食地，尽管鱼类向这类床迁徙的可能驱动因素尚不清楚。在菲律宾棉兰老岛北部的两个地点，对潮间带和潮下带海草床中的鱼类进行了调查，并对潮间带和潮下带及周围裸沙地区的优势营养类群的食物资源进行了比较。在潮间带和潮下海草床采集的鱼类种类重叠65%，两种生境之间的居民和游客的物种丰富度和丰富度没有实质性差异(尽管显著高于潮间带和潮下裸沙区)，因为许多附属于潮间带的居民似乎在退潮时留在潮间带床上。底栖-无脊椎动物食性，包括商业上重要物种的幼体，占潮间带海草床的主导地位，占物种丰富度的70%。其中4种(Halichoeresarus、H.Papilionory、Lethinusharak和Parupeneus barberinus)主要以小型甲壳类动物为食，如腕足类和两足类，潮间带和潮下带海草床的此类食物资源密度显著高于周围裸露沙地地区。结果表明，潮间带海草床除了为栖息物种提供永久栖息地外，还可以作为许多访港鱼类的觅食场所。认识到热带潮间带海草床作为鱼类栖息地的重要性，对管理和保护沿海鱼类生物多样性和渔业资源具有重要意义。
Tropical intertidal seagrass beds have recently been identified as foraging grounds for multiple fish species, although the possible drivers of fish migration to such beds remain unknown. Investigations of fishes occurring in intertidal and subtidal seagrass beds, and comparison of food resources of the dominant trophic groups in the intertidal and subtidal beds, and surrounding bare-sand areas, were conducted at two sites in northern Mindanao, Philippines. Fish species collected in the intertidal and subtidal seagrass beds overlapped by 65%, with species richness and abundance of both residents and visitors between the two habitats not differing substantially (although significantly higher than in intertidal and subtidal bare-sand areas), as many site-attached residents appeared to remain in the intertidal beds during low tide. Benthic-invertebrate feeders, including juveniles of commercially important species, dominated intertidal seagrass beds, comprising >70% of species richness and abundance. Four of them (Halichoeresargus,H. papilionaceous,Lethrinusharak, andParupeneusbarberinus) fed primarily on small crustaceans, such as harpacticoid copepods and amphipods, the densities of such food resources being significantly higher in the intertidal and subtidal seagrass beds than in the surrounding bare-sand areas. The results demonstrated that intertidal seagrass beds function as foraging grounds for many visiting fishes, in addition to providing a permanent habitat for resident species. Recognition of the importance of tropical intertidal seagrass beds as fish habitat has significant implications for the management and protection of coastal fish biodiversity and fishery resources.