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首页> 外文期刊>Estuarine Coastal and Shelf Science >Cross and long-shore variations in reef fish assemblage structure and implications for biodiversity management
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Cross and long-shore variations in reef fish assemblage structure and implications for biodiversity management

机译：礁鱼组合结构的跨岸和长岸变化及其对生物多样性管理的影响

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摘要

Fish communities are an important cultural, recreational and commercial resource that also have an important role in the functioning of marine ecosystems. Around the world fish assemblages are experiencing pressures from anthropogenic activities, and marine spatial planning is being established to mitigate these impacts and assist with biodiversity conservation. Information about how fish assemblages are structured across a range of spatial scales which encompass variations in physical, biotic and environmental parameters will assist marine spatial planning and management. We investigated differences in reef fish assemblage composition over three reef lines across an inshore to offshore gradient (3-23 m depth) at two marine reserves (70 km apart) in the Perth metropolitan region, Western Australia. There were significant increases in the number of individuals, species richness, and relative abundance of fish species across the shallow shelf depth gradient in the two locations. There were distinct fish assemblages associated with each reef line, correlated to depth and distance from shore. The differences across the shelf gradient, even over this small depth range, were greater than the differences between the two locations. These findings have implications for marine spatial management and the design of marine reserves that aim to conserve biodiversity. It may be most appropriate for such marine reserves to encompass a wide depth gradient, rather than a large longshore area. At the very least, cross and longshore patterns in fish assemblages should be taken into consideration and used to guide spatial management plans for biodiversity conservation.
机译：鱼类群落是重要的文化，娱乐和商业资源，在海洋生态系统的运作中也具有重要作用。在世界范围内，鱼类种群正承受来自人为活动的压力，并且正在建立海洋空间规划以减轻这些影响并协助保护生物多样性。关于鱼类集合体如何在一系列空间尺度上结构化的信息，包括物理，生物和环境参数的变化，将有助于海洋空间规划和管理。我们调查了西澳大利亚珀斯都会区两个海洋保护区（相距70公里）沿近海至近海坡度（3-23 m深度）的三个礁线上的礁鱼组合组成的差异。在这两个位置的浅层架子深度梯度中，鱼类的个体数量，物种丰富度和相对丰富度都有显着增加。每个珊瑚礁线都有不同的鱼类组合，与到岸的深度和距离有关。即使在这个较小的深度范围内，整个大陆架梯度的差异也大于两个位置之间的差异。这些发现对海洋空间管理和旨在保护生物多样性的海洋保护区的设计具有重要意义。对于此类海洋保护区而言，涵盖较宽的深度梯度而不是较大的沿岸地区可能是最合适的。至少应考虑鱼群中的跨岸和长岸模式，并将其用于指导生物多样性保护的空间管理计划。

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