烟台月亮湾岩岸潮间带底栖海藻群落结构的季节变化

月亮湾岩岸潮间带底栖海藻群落的种类组成存在显著的季节差异 ,春季群落的种类最丰富 (2 7种 ) ,其次为秋季群落 (2 6种 ) ,夏季和冬季较少 (2 2和 2 1种 ) ,4个季节群落的共有种仅为 7种。各季节群落中均以红藻的种类最丰富 ,褐藻次之 ,绿藻最少。在 4个季节群落中生物量的变化如下 :夏季 >秋季 >冬季 >春季。绿藻和褐藻类群主要为暖温性种类 ,而红藻类群比较复杂 ,即有暖温带性的、温带和暖水性种类 ,也有寒温带的冷水性种类。4个季节群落的物种优势度序列存在明显的差异 ,海黍子在春季和冬季为群落的第 1优势种 ,而孔石莼在夏季和秋季为第 1优势种。不同季节群落多样性指数变化如下 :物种丰富度指数 ,春季 >秋季 >冬季 >夏季 ;物种多样性指数 ,秋季 >夏季 >春季>冬季 ;均匀度指数 ,春季 >夏季 >冬季 >秋季

Seasonal Fluctuation of Benthic Algal Community in the Rocky Intertidals of Moon Bay, Yantai

The seasonal variation of specie s composition of the benthic algal communitys in the rocky intertidals of Moon Bay, Yantai is found to be remarkable. The number of species was the largest in spring which was 27, in autumn it was 26, ranking second, and was the smalle st in both summer and winter. Only seven species were cominon in all the four s easons of which red algae was the richest in species while green algae the poore st. The algal biomass fluctuation in the four seasonal communities was as follow s: in summer> in autumn> in winter> in spring. The species of green and brown algae found in the intertidal were mainly warm t emperate, those of red algae were more varied, however, including warm temperate , temperate and subtropic as well as cold temperate species. There existed signi ficant difference in species dominance among the four seasonal communities. The seasonal variation of the index of abundance can be described as spring>autumn>w inter>summer.For the seasonal variation of the index of diversity, autumn>summer >spring>winter, and for that of the index of evenness, spring>summer>winter>spri ng.