摘要
采集了南海北部沿岸潮间带冬季(2019年1月)4个典型站位沉积物样品,对自由生活线虫的丰度、生物量和生产量等进行了研究,并对线虫的分类鉴定和群落多样性进行了初步分析。结果表明,南海北部潮间带4个站位线虫的平均丰度为1217±479(ind·10 cm-2),平均生物量和生产量分别为487±192(μgdwt·10 cm-2)和4379.6±1725.2(μg·10 cm-2·a-1)。从丰度上看,自由生活线虫为最优势类群,其优势度为96.6%。在摄食类型上,沉积食性者(1A+1B)无论是在物种数(64.9%)还是个体数(64.8%)上均最占优势。4个站位线虫群落中雌雄比例平均为1.42:1,幼体占线虫群落个体总数的平均值为20.2%。4个站位共鉴定出自由生活海洋线虫57种,隶属于34个属,19科,3目,主要优势种为Steineria ampullacea Wieser&Hopper,1967、Theristus pertenuis Bresslau&Schuurmans Stekhoven,1935和Pseudolella major Wang&Huang,2016等。海洋线虫丰度的CLUSTER等级聚类分析显示,在40%相似性水平上可分为3组,线虫的非度量多维标度(MDS)分析结果与CLUSTER等级聚类分析结果一致,线虫群落的多样性分析显示南海北部潮间带自由生活线虫群落具有低优势度和较高多样性的特点。
Samples of sediments from 4 typical stations in the intertidal zone of the northern South China Sea in winter(January 2019) were collected.The abundance,biomass and production of free-living nematodes were studied,and the nematodes were classified identification and diversity of nematode communities were preliminarily analyzed.The results showed that the average abundance of nematodes at 4 stations in the intertidal zone of the northern South China Sea was 1217±479(ind·10 cm-2),and the average biomass and production were 487±192(μgdwt·10 cm-2) and 4379.6±1725.2(μg·10 cm-2·a-1),respectively.In terms of abundance,free-living nematodes are the most dominant group with a dominance of 96.6%.In terms of feeding type,the deposit feeders(1 A+1 B) are the most dominant no matter in the number of species(64.9%) or the number of individuals(64.8%);the average ratio of male to female in the nematode community at the four stations is 1.42:1.The larvae accounted for 20.2% of the total number of individuals in the nematode community.A total of 57 species of free-living marine nematodes were identified in 4 stations,belonging to 34 genera,19 families and 3 orders.The main dominant species are Steineria am pullacea Wieser & Hopper,1967,Theristus pertenuis Bresslau & Schuurmans Stekhoven,1935 and Pseudolella major Wang & Huang,2016 etc.The CLUSTER analysis of the abundance of free-living nematodes shows that they can be divided into 3 groups at a similar level of 40%.The results of the non-metric multidimensional scale(MDS) analysis of the nematodes are consistent with the results of the cluster analysis of the CLUSTER level.Diversity analysis of nematode communities shows that free-living nematode communities in the intertidal zone of the northern South China Sea have the characteristics of low dominance and higher diversity.
作者
乔春艳
郝映东
陆洋
黄勇
QIAO Chunyan;HAO Yingdong;LU Yang;HUANG Yong(School of Life Sciences,Liaocheng University,Liaocheng 252059,China)
出处
《聊城大学学报（自然科学版）》
2021年第2期65-72,共8页
Journal of Liaocheng University:Natural Science Edition
基金
国家自然科学基金项目(41676146)资助。
关键词
南海北部潮间带
自由生活海洋线虫
丰度
生物量
生物多样性
intertidal zone in northern South China Sea
free-living marine nematodes
abundance
biomass
biodiversity
