中街山列岛岛礁生境游泳动物群落多样性及稳定性分析

Nekton Community Diversity and Stability in Zhongjieshan Islands Reef Island Area

基于2012年11月(秋季),2013年2月(冬季),2012年5月(春季),2013年8月(夏季)对中街山列岛海洋保护区岛礁区的定置刺网调查数据,对岛礁生境游泳动物群落多样性及群落稳定性分析,结果如下:岛礁区共出现鱼类40种隶属10目27科35属,甲壳类14种隶属2目9科10属,头足类1种。对群落多样性指数的分析结果显示,Margalef种类丰富度指数,Shannon-Wiener多样性指数,均为夏季>秋季>春季>冬季,其均值分别为5.87、2.57;Pielou均匀度指数各季节相差不大,平均值为0.8。ABC曲线的分析显示:群落受干扰程度为秋季>夏季>春季>冬季。群落的季节更替指数和迁移指数研究表明,AI值在冬季最高达221,在夏季最低为111。

Based on the data from Zhongjieshan Islands MPA and nearwaters by using setting gillnet in 2012-2013, to analysis the diversity and stability of nekton community that resides in reef island area.The result showed that 40 species belonging to 27 families, 35 genus,2 orders of fish,14 species belonging to 9 families,10 genus, 2 orders of crustaceans and 1 specie of nekton were caught. The mean value of Shannon-Wiener index and Margalef richness index were 5.87 and 2.57, respectively. Both index indicated the same trend： summerautumnspringwinter. The Pielou evenness index was almost the same in every season and the mean value was 0.8. The abundance and biomass curves（ABC） showed the order of successively decreasing community disturbance in autumn, summer, spring and winter. The community seasonal replace index and migration index indicated that the maximum AI value in winter was 221 and the minimum in summer was 111.