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Effect of experimental increase of meiobenthos density on the estuarine intertidal community int he white sea

机译:实验性鱼尾草密度增加对白海河口潮间带群落的影响

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摘要

The responses of meiobenthos and ciliates to the experimental increase of the density of the total meiobenthos or the large-size nematode Enoplus demani were studied in the muddy-sand intertidal zone of the White Sea estuary. None of the main quantitative and structural characteristics of the meiobenthos (abundance, species composition, trophic structure, and vertical distribution) has changed during the experiment. The total density of ciliates (microbenthos) also remained constant; however, the structure of the taxocene has changed. The precentage of the algivorous species (Tracheloraphis incaudatus, Remanella margaritifers, and Histiobslanthium majus) decreased, while the precentage of the bacterivorous forms (Uronema marina, Mesodinium pulex, Cyclidium spp. and lagynophrya spp) increased. Most likely, these changes were determined by the alterations in the proportions of the ciliate food resources. It is considered that the density of the meiobenthos is more likely controlled by abiotic factors than by the trophic resource.
机译:在白海河口的泥沙-潮间带研究了鱼尾和纤毛对总鱼尾或大型线虫Enoplus demani密度增加的实验响应。在实验过程中,鱼底栖动物的主要数量和结构特征(丰度,物种组成,营养结构和垂直分布)没有变化。纤毛虫的总密度也保持恒定。但是,紫杉烷的结构发生了变化。食肉物种(印度螯虾,玛格丽特曼酒和玛氏梭状芽胞杆菌)的比例降低,而细菌形式(Uronema滨海,中生白粉虫,Cyclidium spp。和lagynophrya spp)的比例增加。这些变化很可能是由纤毛虫食物资源比例的变化决定的。人们认为,生物的底栖动物的密度更可能由非生物因素控制,而不是由营养资源控制。

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