Cross‐shore distributions of peracarid crustaceans after changes in beach morphology: The importance of suction as a key geoenvironmental variable,Ecological Research

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Cross‐shore distributions of peracarid crustaceans after changes in beach morphology: The importance of suction as a key geoenvironmental variable
Ecological Research ( IF 1.7 ) Pub Date : 2020-07-28 , DOI: 10.1111/1440-1703.12151
Soonbo Yang ₁ , Shinji Sassa ₁ , Yoshitake Takada ₂

Affiliation

Recently, it has been shown that suction, which means the tension of moisture in sediments, is responsible for the distribution limits of the amphipods Haustorioides japonicus and Trinorchestia trinitatis and the isopod Excirolana chiltoni. Such effects take place through three distinctive suction‐induced mechanisms, associated with burrowing, physiology and the stability of burrows. Based on this background, in this study, we investigated storm‐induced morphological changes in beach profiles and the associated variations in geoenvironments, namely the suction, the degree of saturation, water content and sediment hardness, of the sandy beach habitats. The associated changes in cross‐shore distributions of the three peracarid crustaceans were also investigated. Field studies were carried out before and after monsoonal storms at two sandy beaches, Maze and Gokahama, located on the Japan Sea coast in Niigata Prefecture, Japan. The results showed that the suction‐induced variations of the geophysical environments were universal, irrespective of the storm‐induced morphological changes in the beach profiles. In addition, there were distinct changes in the cross‐shore distributions of the peracarid crustacean populations, associated with the storm‐induced morphological changes. The variations in the developed suction consistently and quantitatively accounted for these distinct changes in the cross‐shore distributions of the peracarid crustaceans, associated with the event‐induced morphological changes. Hence, suction played a crucial role as a key geoenvironmental variable in determining the distribution changes of the three peracarid crustaceans studied, even following the event‐induced morphological changes of the beach profiles.

中文翻译：

海滩形态发生变化后的过全软体动物的跨岸分布：吸力作为关键地球环境变量的重要性

最近，研究表明吸力是指沉积物中水分的张力，它负责两栖类鱼两栖类和Trinorchestia trinitatis以及等足类Excirolana chiltoni的分布限制。。这种影响是通过三种独特的吸力诱导机制发生的，这些机制与洞穴，生理和洞穴的稳定性有关。基于此背景，在本研究中，我们调查了风暴引起的海滩剖面形态变化以及相关的地质环境变化，即沙滩生境的吸力，饱和度，水含量和沉积物硬度。还研究了三种过孔全甲壳类动物的跨岸分布的相关变化。在季风风暴前后，在日本新泻县日本海沿岸的两个沙滩Maze和Gokahama进行了田野研究。结果表明，吸力引起的地球物理环境变化是普遍的，无论风暴引起的海滩剖面形态变化如何。此外，与风暴引起的形态学变化有关的永生甲壳纲甲壳类种群的跨岸分布也发生了明显变化。发达吸力的变化一致且定量地解释了过孔甲壳动物跨岸分布中的这些明显变化，与事件引起的形态学变化有关。因此，即使在事件引起的海滩剖面形态变化之后，吸力在确定研究的三个过孔全甲壳类动物的分布变化中也起着关键的地球环境变量的作用。与风暴引起的形态变化有关。发达吸力的变化一致且定量地解释了过孔甲壳动物跨岸分布中的这些明显变化，与事件引起的形态学变化有关。因此，即使在事件引起的海滩剖面形态变化之后，吸力在确定研究的三个过孔全甲壳类动物的分布变化中也起着关键的地球环境变量的作用。与风暴引起的形态变化有关。发达吸力的变化一致且定量地解释了过孔甲壳动物跨岸分布中的这些明显变化，与事件引起的形态学变化有关。因此，即使在事件引起的海滩剖面形态变化之后，吸力在确定研究的三个过孔全甲壳类动物的分布变化中也起着关键的地球环境变量的作用。

更新日期：2020-09-23

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