ABSTRACT

The species composition and abundance of benthic macroinvertebrates in the Eastern Black Sea were determined seasonally, between May 2013 and February 2014. Sediment was collected using a Van Veen grab, at different depths: 5–15 m, 15–25 m, 25–35 m and >35 m. A total of 320 hauls were undertaken at 80 stations, and 90 species were identified, from seven phyla and 47 families. Overall, Mollusca was the most diverse phylum, with 32 species, followed by Annelida (32) and Arthropoda (13). The most abundant species was Chamelea gallina, which accounted for 37% of the total number of individuals, followed by Gouldia minima (25%) and Pitar rudis (10%). Based on seasonal variations, 62 species were identified in winter, 59 in summer, 54 in spring and 46 in autumn. The highest abundance was recorded in summer, representing 37.8% of the total abundance, followed by spring (25.2%). The species with the highest abundance in all four seasons was C. gallina followed by G. minima. Also, C. gallina followed by G. minima was the most abundant species in Samsun, Ordu, Giresun and Trabzon, whereas in Rize and Artvin, the most abundant species was G. minima followed by C. gallina. The results of this study should provide baseline data for future monitoring, to understand the consequences of natural or anthropogenic disturbance on the species composition and abundance pattern of the benthic macroinvertebrate community along the coast of the Eastern Black Sea.

摘要

在2013年5月至2014年2月之间，季节性确定了东部黑海底栖大型无脊椎动物的物种组成和丰度。使用Van Veen抓斗在不同深度下收集沉积物：5-15 m，15-25 m，25-35 m和> 35 m。在80个站共进行了320次捕捞，从7个门和47个科中鉴定出90种。总体而言，软体动物是最多样化的门，有32种，其次是Annelida（32）和节肢动物（13）。最丰富的物种是Chamelea gallina，占个体总数的37％，其次是Gouldia minima（25％）和Pitar rudis（10％）。根据季节变化，冬季共鉴定出62种，夏季鉴定为59种，春季鉴定为54种，秋季鉴定为46种。夏季的丰度最高，占总丰度的37.8％，其次是春季（25.2％）。在所有四个季节中，丰度最高的物种是加里氏梭菌（C. gallina），其次是极小菌G. minima。同样，在萨姆松，奥尔杜，吉雷松和特拉布宗，C。gallina紧随其后的是最小种，而在Rize和Artvin中，最丰富的物种是G. minima，其次是C. gallina。。这项研究的结果应为将来的监测提供基准数据，以了解自然或人为干扰对东部黑海沿岸底栖大型无脊椎动物群落物种组成和丰度模式的后果。