胶州湾大型底栖动物生态学初步研究

分别于2018年冬季(1月)和夏季(9月)对胶州湾进行了2个航次20个相同站位的大型底栖动物调查。共鉴定出大型底栖动物287种。大型底栖动物的总平均丰度和生物量分别为2026个/m^2和378.0 g/m^2,2航次的丰度和生物量均呈现由胶州湾中部向南北两侧增大的趋势。调查水域优势种主要为多毛类,但相对重要性指数(I RI)最高的物种为菲律宾蛤仔(Ruditapes philippinarum)。Shannon-Wiener多样性指数结果表明,胶州湾北部部分站位受到扰动(H′<2)。聚类分析表明在35%和26%的相似性水平上冬季和夏季航次的大型底栖动物分别划为2个和3个群落。Pearson相关分析结果显示底温是影响胶州湾大型底栖动物丰度分布的主要因素。

Preliminary Study on the Ecology of Macrobenthos in Jiaozhou Bay

Based on the data collected in 20 stations of two survey cruises in winter(January)and summer(September)of 2018 in Jiaozhou Bay,a total of 287 macrobenthos species was identified.The average abundance and biomass of macrobenthos were 2026 ind./m^2 and 378.0 g/m^2 respectively,both of them showed a trend of increasing from the middle to the northern and southern parts of Jiaozhou Bay.The composition of dominant species varied seasonally,the most dominant species was polychaetes,and Ruditapes philippinarum in had a highest I RI value.The Shannon-Wiener index(H′)indicated that the environment of northern part of Jiaozhou Bay was disturbed(H′<2).The cluster analysis showed that the macrobenthos in the surveyed area were divided into 2(winter)and 3(summer)communities at the similarity level of 35%and 26%respectively.The result of Pearson analysis showed that the distribution of macrobenthos abundance had a significant correlation with the temperature of bottom water.