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首页> 外文期刊>Marine biology >Epibenthic macrofaunal community response after a mega-earthquake and tsunami in a shallow bay off central-south Chile
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Epibenthic macrofaunal community response after a mega-earthquake and tsunami in a shallow bay off central-south Chile

机译：智利中南部附近一个浅湾中发生的特大地震和海啸后的上肢大动物群落反应

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On February 27, 2010, the world's sixth strongest earthquake on record (8.8 M_w) and tsunami hit central Chile. We assess the response of the epibenthic macrofaunal community following this event in Coliumo Bay, one of the areas most affected by this mega-perturbation. The indicators of aggregate and compositional variability show that 3 years after this event, the community appears to have undergone the following dynamics: (1) At an inter-annual timescale, the community (both in density and biomass) shifted through different structures with apparent directionality; (2) Oceanographic and biological seasonality had a strong cyclical influence on the inter-annual community response; (3) There was spatial homogenization of the community over time (i.e., recovery of diversity), probably promoted by the ecological functionality of scavenger species (i.e., crab Cancer coronatus and snail Nassarius spp.) and by the proportional increase in non-dominant species; (4) Bathymetry and bottom dissolved oxygen also played significant roles in the spatial structure of this community; (5) Three years after the perturbation, total density and total community biomass were still considerably below those described under unperturbed conditions, mainly associated with the decrease in density and biomass of dominant species. Therefore, in spite of this apparent community compositional recovery, the aggregate variability currently remains below the levels reported prior to the effect of the mega-earthquake and tsunami. These results provide evidence that supports both the Cross-Scale Resilience Hypothesis and the Response Diversity Hypothesis.
机译：2010年2月27日，有史以来第六大地震（8.8 M_w）和海啸袭击了智利中部。我们评估了Coliumo湾发生此事件后的表皮大型动物群落的响应，该事件是受这种大扰动影响最大的地区之一。总体和组成变异性的指标表明，该事件发生三年后，该群落似乎经历了以下动态：（1）在年际时间尺度上，该群落（密度和生物量）均通过不同的结构发生了明显的变化。方向性（2）海洋和生物季节性对年度间社区反应有很强的周期性影响； （3）随着时间的流逝，群落的空间均质化（即多样性的恢复），这可能是由于清除剂物种（即蟹状巨蟹和蜗牛Nassarius spp。）的生态功能以及非显性物种的比例增加所促进的。种类; （4）测深法和底部溶解氧在该群落的空间结构中也起着重要作用； （5）扰动后三年，总密度和总群落生物量仍大大低于未扰动条件下所述的密度，这主要与优势种的密度和生物量下降有关。因此，尽管出现了明显的群落组成恢复，但总体变异性目前仍低于在特大地震和海啸发生之前报告的水平。这些结果提供了支持跨尺度弹性假说和反应多样性假说的证据。

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    《Marine biology》 |2014年第3期|681-696|共16页
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    Eduardo Hernandez-Miranda; Jose Cisterna; Ernesto Diaz-Cabrera; Rodrigo Veas; Renato A. Quinones;

  • 作者单位

    Programa de Investigacion Marina de Excelencia (PIMEX), Facultad de Ciencias Naturales y Oceanograficas, Universidad de Concepcion, Concepcion, Chile ,Interdisciplinary Center for Aquaculture Research (INCAR), Casilla 160-C, Universidad de Concepcion, Concepcion, Chile;

    Programa de Investigacion Marina de Excelencia (PIMEX), Facultad de Ciencias Naturales y Oceanograficas, Universidad de Concepcion, Concepcion, Chile ,Graduate Program in Oceanography, Department of Oceanography, Casilla 160-C, University of Concepcion, Concepcion, Chile;

    Programa de Investigacion Marina de Excelencia (PIMEX), Facultad de Ciencias Naturales y Oceanograficas, Universidad de Concepcion, Concepcion, Chile;

    Programa de Investigacion Marina de Excelencia (PIMEX), Facultad de Ciencias Naturales y Oceanograficas, Universidad de Concepcion, Concepcion, Chile;

    Programa de Investigacion Marina de Excelencia (PIMEX), Facultad de Ciencias Naturales y Oceanograficas, Universidad de Concepcion, Concepcion, Chile ,Interdisciplinary Center for Aquaculture Research (INCAR), Casilla 160-C, Universidad de Concepcion, Concepcion, Chile ,Graduate Program in Oceanography, Department of Oceanography, Casilla 160-C, University of Concepcion, Concepcion, Chile;

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