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首页> 美国卫生研究院文献>Scientific Reports >Endemic fish species structuring oceanic intertidal reef assemblages
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Endemic fish species structuring oceanic intertidal reef assemblages

机译：构成海洋潮间带礁组合的特有鱼类

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Intertidal reef environments are facing a global crisis as climate changes are causing sea-level rise. Synergistically, other human-induced impacts (e.g., sewage, habitat loss) caused by concentration of human populations near the coast increase the natural vulnerability of intertidal ecosystems. However, the effect of these threats have long been neglected due, in part, to a limited knowledge of some aspects of intertidal fish ecology. We tested what are the main differences and drivers in fish assemblages structure between tidepools in three oceanic and three continental shelf (coastal) sites of the tropical southwestern Atlantic (Brazilian Province) using standardized sampling methods. Oceanic and coastal fish assemblages were distinctly structured at the trophic and composition levels. The noteworthy endemism species rate (38–44%) and high densities in oceanic sites are supported by resident species restricted to mid and high-shore tidepools where herbivores were the major trophic group. The coastal sites, on the other hand, were dominated by widely distributed and carnivore species. Physical (substrate type, pool height, subtidal distance and rock coverage), biological (sessile animal coverage) and chemical (salinity) parameters act as the driving forces influencing fish spatial occupancy. Here, clear evidences of high fish endemism and importance of endemics structuring oceanic communities may act as the last straw in favor of the conservation of oceanic intertidal reefs.
机译：随着气候变化导致海平面上升，潮间带礁环境正面临全球危机。协同作用，沿海人口密集导致的其他人为影响（例如，污水，栖息地丧失）增加了潮间带生态系统的自然脆弱性。但是，由于对潮间带鱼类生态学某些方面的了解有限，因此长期以来一直忽略了这些威胁的影响。我们使用标准抽样方法测试了热带西南大西洋（巴西省）的三个海洋和三个大陆架（沿海）站点潮池之间的主要鱼类群落结构差异和驱动因素。海洋和沿海鱼类的集合在营养和组成层次上具有明显的结构。值得注意的地方特有物种比率（38–44％）和高密度的海洋地区得到了居民的支持，这些居民仅限于中，高岸潮汐池，其中食草动物是主要的营养族。另一方面，沿海地区则以分布广泛的食肉动物为主。物理（底物类型，池高，潮下距离和岩石覆盖率），生物学（无柄动物覆盖率）和化学（盐度）参数是影响鱼类空间占有率的驱动力。在这里，清楚的证据表明，鱼类具有较高的地方特有性，而地方特有的构成海洋群落的重要性可能是支持保护海洋潮间带的最后一根稻草。

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