闽江口以南近海底栖生物群落生态研究

Study on benthos community ecology in the southern estuary of the Minjiang Estuary

对闽江口以南近海底栖生物的种类组成、生物量及栖息密度的分布和多样性及其与底质环境的关系进行了叙述和讨论。结果表明:本次调查获得大型底栖生物标本经初步鉴定为114种,其中多毛类63种占首位,占总种数的55％。总生物量为14．42 g／m2,总栖息密度为161个／m2。在总生物量组成中,甲壳动物占优势为29．7％,在总密度组成中,多毛类占优势为37．9％。从多样性方面来分析,多样性好的群落,多样性指数高、丰度高、均匀度亦高。在泉州湾口、镇海角和浮头湾有文昌鱼分布,值得重视和保护;而在莆田的兴化湾、东山的诏安湾出现了大量的短吻螠,具有资源利用价值。

The specific composition, biomass, distribution and diversity of the inhabit＇s density, and the connection of the sediments＇ environment are studied in southern estuary of the Minjiang Estuary. 114 species of benthos are indentified and 63 of them are the class polychaeta（55% ） mostly. The total benthis biomass is14.42 g/m^2 and most of them are crustaceans（29.7% ） ; the total density is 161 ind/m^2 and most of them are the class polychaeta（37.9% ）. According to the diversity, where the community is better, the index, the abundance and the evenness is better. The Branchiostoma sp stays at the estuary of Quanzhou Bay, the corner of Zhenhai and the Futou Bay, which is worth of protecting and be thinking of; and so much Listeiolobus brevirostris is founded in the Xinghua Bay of Putian and Zhaoan Bay of Dongshan, which has the merit of resource utilization.