Based on the biomass, polychaetes ( 29%), benthic copepods ( 23%) and nematodes ( 20%) were the main groups. 按生物量,优势类群依次为多毛类(占29%)、桡足类(23%)和线虫(20%)
By bioassay, there are 27 species of benthons at silt beacher of tide areas in Liuheng Island, among which molluscs amount to 40. 8%, polychaetes and crustaceans 29.6% respectively. 经鉴定,六横岛泥沙滩潮间带共有底栖生物27种,其中软体动物占40.8%,多毛类和甲壳类各占29.6%。
Phylogenetic analysis of polychaetes based on sequences of 18S rDNA and CO ⅰ segments 多毛类18Srdna和COⅠ基因序列片段及其分子系统发育研究
Ecology of soft intertidal polychaetes in Xiamen area 厦门地区软相潮间带多毛类的生态
A total of 32 species of invertebrates have been obtained and identified for qualitative and quantitative assessment of benthic animals. Of these, 8 species were molluscs, 14 were crustaceans, 8 were polychaetes in addition to 2 species of other animals. 初步鉴定无脊椎动物32种,其中软体动物8种,甲壳类14种,多毛类8种,其它动物2种。
As an important component of macrobenthos, benthic polychaetes are species-richness and widely distributed in the ocean. Bioturbation induced by polychaetes may have great impacts on sediment reworking. 底栖多毛类是大型底栖动物的重要组成部分,种类多,分布广,它们引发的生物扰动有利于海洋沉积物改造。
The annual average abundance of the phytal fauna is 606 inds./ g dwt algae on Sargassum thunbergii. Nematodes and copepods are the most dominant, followed by gastropods and polychaetes. 鼠尾藻附植动物的年平均丰度为606inds./gdwtalgae,优势类群为线虫和桡足类,其次是腹足类和多毛类。
Polychaete high-biomass zones closely correlated with upwellings, because sufficient food supply benefits inhabitation of polychaetes. 4. 多毛类高生物量区与上升流关系密切,上升流区食物供应充足,对多毛类栖息有利。
Polychaetes are firstly divided into two major ecotypes according to sediment type, one in finer sediment and the other in coarser sediment, and the species composition of these two ecotypes are greatly different. 调查海区多毛类可根据沉积物类型首先划分为细粒沉积物和粗粒沉积物两种生态类型,这两种类型的多毛类组成差别最大。