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浙江沿岸海域螺贝类群落结构及其季节变化
卢占晖, 朱文斌, 徐开达, 钟志, 周永东
浙江省海洋水产研究所
摘要:
根据2019年全年四个航次浙江沿岸海域单船底拖网调查资料,分析了四季节浙江沿岸海域螺贝类的种类组成、优势种及资源密度分布,采用生态多样性指数和丰度/生物量比较曲线(ABC曲线)分析了群落物种多样性及其动态变化。结果表明:浙江沿岸海域全年共捕获螺贝类43种,隶属于2纲,7目,26科。螺贝类群落优势种为棒锥螺(Turritella bacillum)、习见蛙螺(Bursa rana)和褐管蛾螺(Siphonalia spadicea),其中棒锥螺为浙江沿岸螺贝类群落中的绝对优势种。浙江沿岸海域螺贝类年平均资源密度为212.06kg/km2,其中夏季平均资源密度为全年最高,资源密度总体上呈现由北向南逐渐增高的趋势。种类丰富度指数(D)、物种多样性指数(H’)和种类均匀度指数(J′)三种群落多样性指数均不高,螺贝类群落多样性水平处于较低水平;根据ABC曲线评估干扰对螺贝类群落的影响可得:全年四个季节浙江沿岸螺贝类群落均处于中等干扰状态。
关键词:  浙江沿岸  螺贝类  种类组成  资源密度  生物多样性  ABC曲线
DOI:
分类号:S931
基金项目:
A STUDY ON SEASONAL CHANGES OF THE SNAILS AND SHELLFISH COMMUNITIES ZHEJIANG COAST AREA
LU Zhan-Hui, ZHU Wen-Bin, XU Kai-Da, ZHONG Zhi, ZHOU Yong-Dong
Marine Fishery Institute of Zhejiang Province
Abstract:
Based on survey data collected in 4 seasons of 2019 by single bottom trawling of Zhejiang surrounding waters, the paper analysed species composition, dominant species and the distribution、surrounding waters, the paper analysed species composition, dominant species and the distribution of resources density of snails and shellfish. Ecosystem diversity index and abundance/biomass parison curve (ABC curve) were adopted to analyse species diversity of community and its dynamic changes.The results showed 43 snails and shellfish species were captured belonging to 2 classes 7 orders, and 26 families, and the dominant species were Turritella bacillum ,Bursa rana and Siphonalia spadicea all the year; Turritella bacillum was the absolute dominant species in the snails and shellfish community along the coast area of Zhejiang Province. The annual average resource density was 212.06 kg/km2 , The resource density in summer was the highest value in the whole year.The average resource density was increasing gradually from north to south roughly.The annual average values of species abundance index (D), species diversity index (H’) and species evenness index (J’) were 0.56, 0.71 and 0.66 respectively. Three indices values indicated that snail and shellfish community diversity was on a low level. According to the ABC curve, snails and shellfish communities all the year were moderately disturbed respectively.
Key words:  Zhejiang Coaet  snails and shellfish  species composition  resource density  biological diversity  ABC curve
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