The structure, diversity, spatial and seasonal distributions of amphipod assemblages associated with intertidal Zostera (Zosterella) noltei meadows were studied around the Kneiss Islands (central Mediterranean Sea). This site represents a site of international interest in terms of its ornithological diversity (Important Bird Area, Ramsar Site and SPAMI). The amphipod fauna was sampled at 32 stations in spring 2014. A total of 6,482 individuals belonging to 78 species and 22 families were identified; among these taxa, Lysianassa ceratina is new for the Tunisian amphipod inventory, whereas 25 species are identified for the first time in the Gulf of Gabès. The dominant species are Cymadusa filosa, Microdeutopus gryllotalpa, Gammarus insensibilis, Dexamine spiniventris, Monocorophium insidiosum, Elasmopus rapax, Melita palmata and Leucothoe incisa. Four amphipod assemblages are identified using MDS analysis. The distribution of amphipod assemblages is linked to several environmental factors, such as sediment type, organic matter content and distance from the shore, which is itself associated with a clear inshore–offshore gradient. Seasonal variations of the amphipod assemblage patterns at eight stations, sampled between April 2014 and January 2015, show a maximum abundance and diversity during summer and autumn, with a minimum in winter. These seasonal fluctuations may be related to many factors such as variations of climatic factors (e.g. temperature, salinity), the growth and production rates of Zostera noltei meadows and seasonal patterns in the life cycle of dominant species.

中文翻译：

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潮间带Zostera noltei草甸是否代表两栖动物的有利栖息地？克奈斯群岛（加贝斯海湾：中地中海）

的结构中，分集，与潮间相关端足组合的空间和季节性分布大叶（Zosterella）noltei草地分别围绕Kneiss群岛（中央地中海）研究。这个网站代表了其鸟类学方面的国际关注的网站（重要鸟类区，拉姆萨尔区和SPAMI）。2014年春季，对两栖类动物进行了采样，共采集了32个站的样本。总共鉴定了6482个个体，分别属于78个物种和22个科。在这些分类中，Lysianassa ceratina是突尼斯两栖动物清单中的新物种，而在加贝斯湾首次发现了25种。优势种是Cymadusa filosa，Microdeutopus gryllotalpa，Gammarus insensibilis，Dexamine spiniventris，Innocorophium insidiosum，Elasmopus rapax，Melita palmata和Leucothoe incisa。使用MDS分析确定了四个两足动物的组合。两栖动物组合的分布与几个环境因素有关，例如沉积物类型，有机质含量和与海岸的距离，这本身与清晰的近海-近海梯度有关。2014年4月至2015年1月之间采样的八个站点的两栖动物组合模式的季节性变化显示，夏季和秋季的丰度和多样性最大，冬季最小。这些季节性波动可能与许多因素有关，例如气候因素（例如温度，盐度）的变化，Zostera noltei草甸的生长和生产率以及优势物种生命周期的季节性模式。