渤海小型底栖动物生物量的初步研究

主要以线虫、桡足类、双壳类、多毛类和动吻5个类群对渤海小型底栖动物的生物量进行了估算,并对其水平分布进行了研究.结果表明,3个航次平均,渤海小型底栖动物年生物量为(干重)0.404g/(m2·a);1998年9～10月和1999年4～5月2个航次中小型底栖动物生物量的水平分布主要表现为渤海中东部和海峡口站位的生物量明显高于其他站位,但在1999年航次,海峡口靠近海岸的站位生物量下降,位于莱洲湾B1站位生物量明显上升.依据小型底栖动物的年生产力P=9B,估算渤海小型底栖动物的年平均生产力为(干重)3.636g/(m2·a).还对渤海小型底栖动物生物量与世界其他海域的进行了比较,认为渤海小型底栖动物生物量的数值与其他海域生物量的数值接近,但略偏低.就不同学者研究所得的线虫平均个体干重进行了比较研究.

Biomass of meiofauna in the Bohai Sea, China

A grid of 22 stations,giving a broad geographic coverage of the Bohai Sea and the Bohai Straits was selected.Undisturbed sediments were collected from sampling stations during cruises in July 1997,in September/October 1998 and again in April/May 1999.Based on the the results of Juario,the aver ag e biomass 0.404 g/(m²·a)o f meiofauna(including nematode,Harpacticoida,bivalve larvae,Polychaeta and Kinor hyncha)in the Bohai Sea is given and accounts for 4.5% of the macrofauna in the Bohai Sea.The horizontal distribution of the biomass of meiofauna shows that it was higher at the stations of middle east part of the Bohai Sea and the strait in 1998 and 1999 cruise and it decreased at the stations near the straits mouth and increased at Station B1 in 1999 cruise.The annual average production in the Bohai Sea is 3.636 g/(m²·a),calculating in term of the formula P=9B. Compared with the biomass of other sea areas in the world,the biomass of the Bohai Sea is hear but slightly low. The individual average dry weight of nematodes given by different authors is analysed.