| 摘要: |
| 根据2019年全年4个航次浙江沿岸海域单船底拖网调查资料,分析了浙江沿岸海域螺贝类的种类组成、优势种及资源密度分布的季节变化,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4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：10.11693/hyhz20220400108 |
| 分类号:S931 |
| 基金项目:国家重点研发计划资助项目,2020YFD0900804号,2019YFD0901204号;浙江省重点研发计划资助项目,2019C02056号。 |
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| STUDY ON SEASONAL CHANGES OF SNAILS AND SHELLFISH COMMUNITIES IN COSTAL AREAS OFF ZHEJIANG PROVINCE |
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LU Zhan-Hui, ZHU Wen-Bin, XU Kai-Da, ZHONG Zhi, ZHOU Yong-Dong
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Key Laboratory of Sustainable Utilization of Technology Research for Fishery Resource of Zhejiang Province, Scientific Observing and Experimental Station of Fishery Resources for Key Fishing Grounds, Ministry of Agriculture and Rural Affairs, Marine Fishery Institute of Zhejiang Province, Zhoushan 316004, China
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| Abstract: |
| Based on survey data collected in 4 seasons of 2019 by single bottom trawling in coastal areas off Zhejiang Province, we analyzed the species composition, dominant species, and the distribution in resources density of snails and shellfish. Ecosystem diversity indices and abundance/biomass comparison curve (ABC curve) were adopted to analyze species diversity of community and its dynamic changes. 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 dominant species in the snails and shellfish communities along the coastal area of Zhejiang Province. The annual average resource density was 212.06 kg/km2, the resource density in summer was the highest in the whole year. The average resource density was increasing gradually from north to south. 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, indicating that the snail and shellfish community diversity was in a low level. The ABC curve showed that the snail and shellfish communities were moderately disturbed or in an unstable state. |
| Key words: Zhejiang Coast snail and shellfish species composition resource density biological diversity ABC curve |
