关键词：生物
张志南 慕芳红 于子山 韩 洁 周 红
(青岛海洋大学海洋生命学院，青岛，266003)
摘 要 2000年6月在南黄海鯷鱼产卵场18个站位的调查结果表明，小型底栖生物的平均丰度为0.81×106ind·m-2(±0.41×106ind·m-2)，平均生物量为1.22g dwt·m-2，小型底栖生物的丰度和生物量的水平分布图型大体相似，即高的数量值分布在等深线50m以浅的与海岸线平行的7494、7994、8594、11394等站。小型底栖生物数量与10种环境因子的Pearson相关分析表明，丰度与水深呈负相关(r, -0.555, P<0.05)，与Chl-a呈正相关(r, 0.486, P<0.05)；生物量与水深、沉积物中的粘土含量(％)和水含量(％)均呈负相关(r, 0.484～0.500, P<0.05)。共鉴定出18个小型生物类群，线虫是数量占优势的类群，平均丰度0.60×106ind·m-2(±0.36×106ind·m-2)，占总丰度的73.8%，其他的重要类群依次为底栖桡足类(18.7%)、多毛类(3.1%)、动吻类(1.6%)和介形类(1.1%)。按生物量，优势类群依次为多毛类(占29%)、桡足类(23%)和线虫(20%)。
关键词 小型底栖生物；自由生活海洋线虫；底栖桡足类；丰度；生物量；南黄海
中图法分类号 Q179.4；Q145 文章编号 1001-862(2002)02-51-08
Abundance and Biomass of the Benthic Meiofauna in the Spawning Ground of Anchovy (Engraulis japanicus)in the Southern Yellow Sea,China
Zhang Zhinan Mu Fanghong Yu Zhishan Han Jie
(College of Marine Life Science, Ocean University of Qingdao, Qingdao 266003, China)
Abstract The benthic meiofauna was quantitatively investigated in the spawning ground of anchovy (Engraulis japanicus)in the Southern Yellow Sea during the cruise by《Bei dou》in June, 2000. The results showed that the meiofauna average abundance and biomass were 0.81×106ind·m-2(±0.41×106ind·m-2), and1.22g·dwt·m-2 respectively. The distribution patterns for abundance and biomass were generally the same, that is the high values occurred at stations 7494, 7994, 8594, 11394 along the of 50m isobath. Pearson's correlation analysis showed negative correlations between abundance and water depth (r,-0.555,P<0.05) but positive correlation with ch1-a (r, 0.486, P<0.05). There were also negative correlations between meiofaunal biomass and water depth, clay and water content (%) (r, 0.484-0.500, P<0.05). A total of eighteen meiobenthic groups were recognized. Freeliving marine nematode was the dominant group with a mean abundance of 0.81×106ind·m-2(±0.41×106ind·m-2) constituting 73.8% of the total, the second and many other important groups were benthic copepods (18.7%), polychaetes (3.1%), kinorhychs (1.6%) and ostracods (1.1%). Based on the biomass, polychaetes (29%), benthic copepods (23%) and nematodes (20%) were the main groups.
Key words meiofauna; free-living marine nematodes; benthic copepods; abundance; biomass; the Southern Yellow sea
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