摘要
根据2004年5月、8月、11月和2005年2月(Ⅰ年度)及2005年8月、11月和2006年2月、5月(Ⅱ年度)共2个水文年对中华鲟幼鱼保护区水域(30°15′~31°45′N、121°30′~122°15′E)15个取样站8个航次的底内动物和底上动物样品,对底内动物和底上动物的ABC曲线、群落结构及其与环境因子变化进行分析。底内动物ABC曲线2个年度变化趋势基本一致,W值在0.2~0.3之间,说明长江口中华鲟保护区底内动物群落以较大型底栖动物为主,底上动物ABC曲线2个年度变化趋势亦一致,W值在-0.06^-0.02之间,说明长江口中华鲟保护区底上动物群落以小型底栖动物为主,且均受到一定程度的干扰。通过对潮下带底内动物和底上动物与环境因子关系的BIOENV分析表明,盐度对长江口中华鲟保护区底上动物群落的分布起重要作用,其次为水温和pH值,与DO和水深的关系不大。底内动物的群落结构在夏季、秋季、冬季与盐度有较大的相关性。
Acipenser sinensis is the first national class protection animal in China. It is atypical model of sea - river migration fish. It is a biggest kind of the individual in existing 27 kinds of sturgeons order in world fish, mainly distributing in the East China Sea, Yellow sea and the Yangtze River in China. Mostly, Acipenser sinensis lives in the ocean. From June to August, the mature individual arrives at Yangtze Estuary for procreation migration. In September or October, it reaches Hubei Province along the Yangtze River and gets over the winter there. In October or November of the second year, Acipenser sinensis begins to spawn and return to the ocean soon. In spring of the second year, young sturgeon arrived at Changjiang estuary from April to August. After September, the 30 cm - long young sturgeon goes into the ocean successively. Based on the macrobenthos taken in 15 stations from May, 2004 to February 2005 （Year Ⅰ） and from August, 2005 to May, 2006 （Year Ⅱ ） in Nature Reserve of juvenile Chinese sturgeon Acipenser sinensis, the species composition, biomass and abundance were obtained. Analysis on relationship between the community characteristics and the environment factors of maerobenthos were discussed. The ABC curves had the similar tendency in the first and the second year. The abundance curve lied above the biomass curve on the infauna while the biomass curve lied above the abundance curve on the epifauna. From the BIOENV analysis, the salinity was the main decisive factor to the distribution of the macorbenthos.
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2010年第B03期230-235,共6页
Journal of Agro-Environment Science
基金
中央级公益性科研院所基本科研业务费专项资金(中国水产科学研究院东海水产研究所)资助项目(2008M10)
上海市长江口中华鲟自然保护区科研专项
关键词
大型底栖动物
群落
环境因子
长江口
中华鲟保护区
macrobenthos
community
environment factors
Yangtze Estuary
Nature Reserve of Juvenile Chinese Sturgeon
