摘要
2011年春(4月)、夏(7月)和秋季(10月)在象山港对浮游动物进行了调查(据Ⅰ型和Ⅱ型浮游生物网),分析了优势类群桡足类的物种组成、丰度及群落结构。结果表明:桡足类物种数夏季最高(20种),秋季和春季分别有14和10种;春季丰度最高,夏季和秋季较低;春季优势种是中型桡足类墨氏胸刺水蚤(Centropages mcmurrichi),夏秋季则为小型桡足类太平洋纺锤水蚤(Acartia pacifica)、汤氏长足水蚤(Calanopia thompsoni)及小拟哲水蚤(Paracalanus parvus)。统计分析Ⅰ型网数据,结果表明:群落结构划分为春季低温和夏秋季混合高温2个组群;湾内水体的表层温度、表层硝酸盐及表底层硅酸盐的环境因子组合影响桡足类的群落结构最显著(r=0.836),该组合的各因子分别与桡足类丰度显著负线性相关(P=0.05)。象山港桡足类群落季节变化显著,与以往资料的综合比较发现其季节格局的年际变异性。
In the spring （April）, summer （July）, and autumn （October） of 2011, investigations with types Ⅰ and Ⅱ of plankton net were conducted on the zooplankton in Xiangshan Bay, with the species composition, abundance, and community structure of the dominant zooplankton group copepod analyzed. It was observed that the copepod species richness was the highest in summer （20 species）, followed by in autumn （14 species） and in spring （10 species）. The copepod abundance peaked in spring, and was lower in summer and autumn. Mesocopepod species Centropages mcmurrichi dominated in spring, while smaller copepods such as Acartia pacifica, Calanopia thompsoni, and Paracalanus parvus dominated in summer and autumn. According to the investigation data from type Ⅰ net, the copepod community could be divided into two subgroups, i.e., low temperature group in spring and high temperature group in summer-autumn. The combination of the environmental factors including sea surface temperature, surface nitrate, surface silicate, and bottom silicate had the most significant effects on the copepod community structure in the Bay （r=0.836）, and each of the four prominent variables was significantly negatively correlated with copepod abundance （P=0.05）. Overall, the copepod community in Xiangshan Bay had a significant seasonal variation, and an inter-annual variation was observed in the seasonal pattern of copepod, as compared with historical data.
出处
《生态学杂志》
CAS
CSCD
北大核心
2013年第10期2756-2763,共8页
Chinese Journal of Ecology
基金
农业部公益性行业科研专项(201003068)资助
关键词
桡足类
丰度
优势种
季节性
copepod
abundance
dominant species
seasonality.
