黄海鱼类功能群及其对浮游动物捕食的季节变化

用2006年9月-2007年8月对黄海中南部进行的5次断面调查,通过胃含物分析、聚类分析、功能群划分以及估算摄食量等方法,研究了黄海鱼类群落功能群组成及其对浮游动物摄食的季节变化。结果表明,黄海鱼类群落包括7个功能群,除初春以外,黄海鱼类群落主要以浮游生物食性功能群为主。春夏季的功能群组成简单,秋冬季的功能群组成变得复杂。黄海鱼类群落摄食的浮游动物种类主要有11种,春季摄食的浮游动物量最大,夏秋季逐渐减少,直至冬季摄食的浮游动物量最少,初春摄食的浮游动物量有所回升。不同季节摄食的浮游动物种类,以及摄食量都有较大差异,仅太平洋磷虾在各个月份的食物中均有出现,其余浮游动物饵料种类均是季节性的。

Seasonal variations of the functional groups of fish community and their consumption of zooplankton in the Yellow Sea

In the Yellow Sea,larger,higher trophic level,commercially important demersal species were gradually replaced by small,lower trophic level,pelagic,less-valuable species.Such transition inevitably leads to increase prey on low trophic level species,especially zooplankton.Therefore,it is an important means to discuss control mechanism of biological production in the marine ecosystem and to assess predation pressure on zooplankton.At present,there is still lack of systematic research on combination production ...