Abstract—

Field observations were applied to study the macrophytobenthos of the Abrau Peninsula of the Black Sea and the effect of the two most common and largest species of brown algae of the Black Sea sublittoral, Cystoseira bosphorica and Treptacantha barbata (Cystoseira sensu lato), on species richness and phytocenosis biomass, as well as biomass and the occurrence of related macroalgae species of different ecological groups. In total, 48 species of macroalgae were found in Cystoseira assemblages, including 27 species of Rhodophyta; 11 species of Ochrophyta, Phaeophyceae; and 10 species of Chlorophyta. It was shown that two- to fourfold decrease in the Cystoseira biomass in communities as a whole does not significantly affect their species richness but leads to a decrease in the total biomass of these cenoses and a multidirectional change in participation (biomass, occurrence) of many species of macroalgae. The response of the cenoses to a decrease in biomass of C. bosphorica and T. barbata, as well as its negative character—a decrease in productivity and species richness—was more pronounced at greater depths.

中文翻译：

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Cystoseira Sensu lato（Fucales：Phaeophyceae）对阿布鲁半岛陆架大型植物底栖动物群落（黑海）物种丰富度，组成和生物量的影响

摘要—

野外观察用于研究黑海阿布鲁半岛的大型植物底栖动物，以及黑海沿岸的两种最常见和最大的褐藻物种，Cystoseira bosphorica和Treptacantha barbata（Cystoseira sensu lato）对物种丰富度的影响植物群落的生物量，生物量以及不同生态群的相关大型藻类的发生。总共在Cystoseira组合中发现48种大型藻类，其中包括27种红藻。蕨科11种; 和10种绿藻。结果表明，半胱氨酸减少了2到4倍整个社区的生物量不会显着影响其物种丰富度，但会导致这些普查的总生物量减少，并使许多大型藻类的参与（生物量，发生）发生多向变化。在更深的深度，人口普查对C. bosphorica和T. barbata生物量减少的反应及其负面特征（生产力和物种丰富度的减少）更加明显。