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首页> 外文期刊>Marine ecology progress series >Role of recruitment in causing differences between intertidal assemblages on seawalls and rocky shores
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Role of recruitment in causing differences between intertidal assemblages on seawalls and rocky shores

机译：招募在引起海堤和岩石海岸潮间带组合差异方面的作用

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Following progressive urbanisation of coastal areas, artificial structures are becoming common features of landscapes in shallow waters. Despite this, few studies have focused on the ecological role of these structures or have attempted to assess the extent to which they can act as surrogates for natural habitats. This study investigated whether colonisation of space can determine the occurrence of different intertidal assemblages on rocky shores and sandstone seawalls in Sydney Harbour (New South Wales, Australia). Areas were cleared on rocky shores and seawalls at 3 different locations to test hypotheses from 2 alternative models: (1) patterns of distribution and abundance of organisms on the 2 types of structure are the direct result of different patterns of recruitment and (2) early stages of development of assemblages are the same on the 2 types of structure, but later processes (post-recruitment) differ between structures, producing different older assemblages. Furthermore, the model that assemblages developing in clearings on each structure would converge toward mature assemblages found on the same type of structure was tested. Assemblages in clearings differed between seawalls and rocky shores from the early stages of succession and differences persisted through time. Although there was variability among locations, these assemblages tended to converge toward mature assemblages on the same type of structure. These results support the model that intrinsic differences (e.g. topography, weathering, shape and extent of surfaces) between seawalls and rocky shores could affect the recruitment of algae and invertebrates, leading to the establishment of distinct assemblages. This knowledge could improve our ability to design artificial structures that more closely mimic natural habitats, potentially mitigating some effects of loss and fragmentation of coastal habitats in urban areas.
机译：随着沿海地区逐步城市化，人造结构已成为浅水区景观的共同特征。尽管如此，很少有研究集中在这些结构的生态作用上，或试图评估它们在多大程度上可以作为自然栖息地的替代物。这项研究调查了空间殖民是否可以确定悉尼港（澳大利亚新南威尔士州）的岩石海岸和砂岩海堤上不同潮间带组合的发生。在3个不同位置的岩石海岸和海堤上清理了区域，以测试来自2种替代模型的假设：（1）2种类型结构上生物的分布和丰度模式是不同募集模式的直接结果，以及（2）早期两种类型的结构的组合开发阶段相同，但结构之间的后期处理（招聘后）有所不同，从而产生了不同的旧组合。此外，测试了在每个结构的空地中发展的集合将收敛到在相同类型的结构上发现的成熟集合的模型。从继承的早期阶段开始，海堤和多岩石海岸之间的空地集合有所不同，并且随着时间的流逝，差异一直存在。尽管位置之间存在差异，但是这些组合趋向于在相同类型的结构上趋向成熟的组合。这些结果支持了该模型，即海堤和多岩石的海岸之间的内在差异（例如地形，风化，表面的形状和范围）可能会影响藻类和无脊椎动物的募集，从而导致形成独特的组合。这些知识可以提高我们设计更接近自然栖息地的人工结构的能力，从而可能减轻城市地区沿海栖息地的丧失和破碎化的某些影响。

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