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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Fish community structure in relation to environmental variation in coastal volcanic habitats
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Fish community structure in relation to environmental variation in coastal volcanic habitats

机译：与沿海火山栖息地环境变化有关的鱼类群落结构

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摘要

This study constitutes one of the few works conducted on the colonization of recent lava flows by fish communities in coral reef environment It attempted to describe the mechanisms of colonization and environmental variables influencing the structure of communities on the lava flows of the Piton de la Fournaise volcano at Reunion Island. It also proposed some hypotheses on the mechanisms of selection and speciation of endemic species of the southwestern Indian Ocean region, particularly diversified on the most recent lava flows of the Piton de la Fournaise, and provided a model of distribution of environmental and fish assemblage variables in four homogeneous patterns of colonization (landscapes) retained within the study area. The results showed fish community structure strongly related to measured environmental variables, of which depth, width of the island shelf, age of the lava flow and distance to the most recent lava flow were the most influential. It also appeared that the maximum endemic species richness was measured on the shallower stations, with narrow insular shelf, located on recent lava flows, near the lava flow from the eruption of 2007 (latest volcanic event). These characteristics define a harsh environment, to which endemic species seem well-adapted due in particular to their strong demographic and dietary flexibility. Finally, the patterns of colonization were characterized by significantly different environmental variables. The four homogeneous areas, defined by two geomorphological features, basalt blocks and drop-offs, nested within two locations, inside and outside the volcanic enclosure (current caldera), hosted fish communities whose dominant diets mainly depend on the nature, the abundance and the accessibility of available food resources. Overall, the study highlights that during early stages of ecological succession, site selection by fish communities is highly dependent on environmental constraints, especially of volcanic origin, but the physical habitat selection (geomorphology, substrate rugosity, percentage of soft substrate) seems to have little importance, while at least on the trophic structure and the distribution of endemic species.
机译：这项研究是珊瑚礁环境中鱼类群落近期对熔岩流定殖的少数研究之一。它试图描述定植和环境变量影响Piton de la Fournaise火山熔岩流的群落结构的机制。在留尼汪岛。它还对西南印度洋地区特有物种的选择和物种形成机制提出了一些假设，特别是在Piton de la Fournaise的最新熔岩流上有所多样化，并提供了一个环境和鱼类种群变量分布的模型。研究区域内保留了四个相同的殖民化模式（景观）。结果表明，鱼类群落结构与测量的环境变量密切相关，其中深度，岛架宽度，熔岩流年龄和距最近熔岩流的距离影响最大。似乎还发现最大的特有物种丰富度是在较新的熔岩流上，最近的熔岩流附近，较浅的站台和狭窄的岛架上测得的，该熔岩流距2007年爆发（最近的火山事件）较近。这些特征定义了一个严酷的环境，由于其强大的人口和饮食灵活性，特有物种似乎已适应了这一条件。最后，定殖模式的特征是环境变量明显不同。由两个地貌特征（玄武岩块和落差）定义的四个均质区域嵌套在火山围墙（当前破火山口）的内部和外部两个位置，容纳了鱼类群落，其主要饮食主要取决于自然，丰度和营养。现有粮食资源的可及性。总体而言，研究强调，在生态演替的早期阶段，鱼类群落的选址高度依赖于环境限制，尤其是火山成因，但物理栖息地的选择（地貌，基质褶皱度，软质基质的百分比）似乎很少。重要的是，至少在营养结构和特有物种的分布上。

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    Mathieu Pinault; Claire Bissery; Gilles Gassiole; Helene Magalon; Jean-Pascal Quod; Rene Galzin;

  • 作者单位

    USR 3278 CNRS-EPHE, CRIOBE and CBETM University of Perpignan, 66860 Perpignan, France,Laboratory of Marine Ecology (ECOMM), University of Reunion Island, FRE3560 INEE-CNRS, 15 Avenue Rene Cassin, BP 7151,97715 Saint-Denis, Reunion;

    7 rue Pascal, 29200 Brest, France;

    Asconit Consultants, 16, rue Albert Lougnon, 97490 Sainte-Clotilde, Reunion;

    Laboratory of Marine Ecology (ECOMM), University of Reunion Island, FRE3560 INEE-CNRS, 15 Avenue Rene Cassin, BP 7151,97715 Saint-Denis, Reunion,Laboratory of Excellence 'CORAIL', BP 1013 Moorea, 98729, French Polynesia;

    Agency for Marine Research and Exploitation (ARVAM), 2, Rue Maxime Riviere, 97490 Sainte-Clotilde, Reunion;

    USR 3278 CNRS-EPHE, CRIOBE and CBETM University of Perpignan, 66860 Perpignan, France,Laboratory of Excellence 'CORAIL', BP 1013 Moorea, 98729, French Polynesia;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Rocky shore fish; Volcanic habitat; Endemic species; Reunion Island; Southwestern Indian Ocean; Underwater visual census;

    机译：岩岸鱼;火山栖息地;特有物种;留尼汪岛;西南印度洋;水下视觉普查;

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