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首页> 外文期刊>Marine ecology progress series >Wave action limits crowding in an intertidal mussel
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Wave action limits crowding in an intertidal mussel

机译：波浪作用限制了潮间贻贝的拥挤

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摘要

Intraspecific competition for space is generally invoked as the chief process limiting crowding in sessile or highly sedentary marine invertebrates. However, the mechanisms by which high conspecific density induces individual removal or mortality, in turn restraining crowding in these organisms, generally remain uninvestigated. Here we illustrate that mussel crowding in a southwestern Atlantic rocky intertidal shore is limited by a combination of wave action and space limitation. Brachidontes rodriguezii mussel beds at this site occur primarily as a single layer of individuals because wave forces remove multilayered mussel hummocks guickly after they develop. Mussels in hummocks show lower attachment strength than those in the single-layered matrix. Accordingly, wave conditions associated with the passage of cold fronts (i.e. transition zones from warm air to cold air accompanied by moderate to strong winds and wave action, with 7 d average recurrence times based on historical weather data) cause detectable mussel dislodg-ment in a high proportion of hummocks but have virtually no impact on single-layered areas. Since wave action is the proximate cause of mussel dislodgment, upper limits to crowding in this species would not be fixed to a particular level of space occupation (i.e. as predictable from inter-individual interference alone) but would be variable in space and time depending on wave exposure. This example suggests a mechanism of population control where the impact of a physical factor on population size is larger at higher population density and supports early hypotheses about the occurrence of density-dependent population control by physical factors when the availability of safe sites is limiting.
机译：通常将种内空间竞争作为限制无柄或久坐的海洋无脊椎动物拥挤的主要过程。然而，高同种异体密度诱导个体移出或死亡，进而限制这些生物体中的拥挤的机制，通常尚待研究。在这里，我们说明了在西南大西洋多岩石的潮间带贻贝的拥挤受到波浪作用和空间限制的共同限制。 Brachidontes rodriguezii贻贝床主要作为单层个体出现，因为波浪力在它们生长后迅速去除了多层贻贝山丘。相比之下，山雀中的贻贝的附着强度要低。因此，与冷锋通过有关的波浪条件（即从暖空气到冷空气的过渡区域，伴随着中等到强风和波浪作用，根据历史天气数据平均有7 d的平均复发时间）导致可检测到的贻贝流失。大量的山雀，但对单层区域几乎没有影响。由于波浪作用是贻贝移位的直接原因，因此该物种拥挤的上限不会固定在特定的空间占用水平上（即，仅根据个体间的干扰即可预测），但其时空变化取决于波曝光。该示例提出了一种人口控制机制，其中在较高的人口密度下，物理因素对人口规模的影响更大，并支持了关于在安全场所的可用性受到限制时通过物理因素进行密度依赖性人口控制的假设。

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  • 来源
    《Marine ecology progress series》 |2015年第7期|153-163|共11页
  • 作者

    Jorge L. Gutierrez; M. Gabriela Palomo; Maria Bagur; Lorena P. Arribas; Sabrina A. Soria;

  • 作者单位

    Grupo de Investigacion y Educacion en Temas Ambientales (GrIETA), San Eduardo del Mar, Argentina,Facultad de Ciencias Exactas y Naturales and CONICET, Universidad Nacional de Mar del Plata, Mar del Plata, Argentina,Cary Institute of Ecosystem Studies, Millbrook, NY 12545, USA;

    Grupo de Investigacion y Educacion en Temas Ambientales (GrIETA), San Eduardo del Mar, Argentina,Museo Argentino de Ciencias Naturales 'Bernardino Rivadavia' (MACN-CONICET), Buenos Aires, Argentina;

    Museo Argentino de Ciencias Naturales 'Bernardino Rivadavia' (MACN-CONICET), Buenos Aires, Argentina;

    Museo Argentino de Ciencias Naturales 'Bernardino Rivadavia' (MACN-CONICET), Buenos Aires, Argentina;

    Museo Argentino de Ciencias Naturales 'Bernardino Rivadavia' (MACN-CONICET), Buenos Aires, Argentina;

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  • 正文语种 eng
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  • 关键词

    Density dependence; Dislodgment; Intraspecific competition; Hummocking; Multilayering; Physical factors; Rocky shore; Space limitation;

    机译：密度依赖性流离失所;种内竞争;吊床;多层;物理因素;多岩石的海岸;空间限制;

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