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Assemblage structure, distribution and habitat type of the grapsoid crabs (Brachyura: Grapsoidea) of the coastal forested swamps of northern Borneo
Regional Studies in Marine Science ( IF 2.1 ) Pub Date : 2020-05-26 , DOI: 10.1016/j.rsma.2020.101323
Laura Ribero , Phaik Eem Lim , Rosli Ramli , Gianluca Polgar

Several intertidal and supratidal systems were investigated in the Brunei Bay to assess the diversity and assemblage structure of grapsoid crabs (Brachyura: Grapsoidea) in different salinity and substrate conditions, type of vegetation, and distance from water bodies. The structure of the assemblages differed remarkably across and within sites, and several taxa were not previously recorded from this region. Diversity decreased towards more terrestrial conditions, with systems closer to the sea supporting more diversified assemblages. High and low intertidal areas also hosted different assemblages in terms of taxonomic composition. Most of these species can be considered habitat specialists, and only occurred in a small number of the investigated areas. A small number of habitat generalists were found in several areas, exhibiting eurytopic ecological traits. A time-based sampling method was used to estimate population densities. A few habitat specialists were recorded in high densities, suggesting adaptations to specific environmental conditions in which these species can bloom. These results highlight how the diversity of these assemblages needs to be considered in management plans, to prevent local extinctions and loss of diversity in the area.



中文翻译:

婆罗洲北部沿海森林沼泽地的蟹足类蟹(Brachyura:Grapsoidea)的组装结构,分布和栖息地类型

在文莱湾,研究了几种潮间带和潮间带系统,以评估不同盐度和基质条件,植被类型以及与水体的距离,蟹形蟹(Brachyura:Grapsoidea)的多样性和组合结构。站点之间和站点内部的组合结构显着不同,以前从未在该区域记录过几个分类单元。多样性随着陆地条件的增加而减少,离海更近的系统支持着更加多样化的组合。在生物分类学方面,潮间带高低区域也有不同的组合。这些物种大多数都可以被认为是栖息地专家,并且仅出现在少数被调查地区。在几个地区发现了少数栖息地通才,表现出欧洲的生态特征。基于时间的采样方法用于估计人口密度。记录了一些高密度的栖息地专家,这表明这些物种可以在特定环境条件下开花。这些结果凸显了如何在管理计划中考虑这些组合的多样性,以防止当地灭绝和该地区多样性的丧失。

更新日期:2020-05-26
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