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首页> 外文期刊>Estuarine Coastal and Shelf Science >The influence of geomorphology and sedimentary processes on shallow-water benthic habitat distribution: Esperance Bay, Western Australia
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The influence of geomorphology and sedimentary processes on shallow-water benthic habitat distribution: Esperance Bay, Western Australia

机译：地貌和沉积过程对浅水底栖生境分布的影响：西澳大利亚埃斯佩兰斯湾

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摘要

The mapping of seabed environments is fundamental to successful fisheries management and environmental monitoring, however, there is an emerging need to better characterise habitats based upon appropriate physical parameters. In this study, relationships between seabed geomorphology and the distribution of benthic habitats were examined using multibeam sonar, underwater video, predicted wave energy, and sediment data for Esperance Bay, part of the Recherche Archipelago. This shallow ( ＜ 50 m), high energy, biogenic sediment dominated environment is located in temperate southwestern Australia. Exposure to wave energy appears to determine the distribution of unconsolidated substrate, and is the most useful regional scale predictor of rhodolith and seagrass habitats. Although they are intermittently smothered by mobile sediments, limestone reefs provide habitat for a wide range of sessile organisms, even in very high wave exposure environments. The distribution of rhodolith beds is related to poorly sorted sediments that contain high gravel, mud, and CaCO_3 percentages. Our results reveal that in the Recherche Archipelago, wave abrasion coupled with localised sediment transport and accumulation play a major role in increasing the diversity of inner shelf benthic habitats. This highlights the value of assessing geomorphic processes in order to better understand the distribution and structure of benthic habitats.
机译：海底环境的制图是成功进行渔业管理和环境监测的基础，但是，新出现的需求是根据适当的物理参数更好地表征栖息地。在这项研究中，使用多束声纳，水下视频，预测的波能和Recherche群岛一部分的Esperance湾的沉积物数据，研究了海床地貌与底栖生境分布之间的关系。这种浅（＜50 m），高能，生物成因的沉积物为主的环境位于澳大利亚西南部的温带地区。暴露于波能似乎可以确定未固结基质的分布，并且是菱形石和海草生境的最有用的区域尺度预测指标。尽管它们被流动的沉积物断断续续地窒息，但即使在非常高的波浪暴露环境下，石灰石礁也为广泛的固着生物提供了栖息地。杜鹃石床的分布与含高砾石，泥浆和CaCO_3百分比的沉积物分类不良有关。我们的研究结果表明，在Recherche群岛，波浪磨损与局部沉积物的运输和积累相结合，在增加内陆底栖生境的多样性方面起着重要作用。这突出了评估地貌过程的价值，以便更好地了解底栖生境的分布和结构。

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