| 摘要: |
|
| 关键词: 海洋线虫 底栖生态 群落结构 南黄海 |
| DOI： |
| 分类号: |
| 基金项目:国家973项目资助课题,G19990437号 |
|
| THE MARINE NEMATODES COMMUNITY IN WINTER SOUTHERN YELLOW SEA |
|
HUANG Yong1,2, ZHANG Zhi-Nan1, LIU Xiao-Shou1
|
|
1.College of Marine Life Sciences, Ocean University of China, Qingdao, 266003;2.Life Science College, Liaocheng Univer-sity, Liaocheng, 252000
|
| Abstract: |
| Meiobenthos were sampled at 22 stations in a cruise for studying the winter fishery ground of anchovy in southern Yellow Sea (from 32° 29.35′ N to 37° 0.56′ N, 122° 0.37′ E to 125° 1.16′ E), China in January 2003, where 87.1% of meiofauna species were nematodes in average abundance of (831±247)×10-1 ind/cm2. A total of 80.1% of nematode numbers were in the top layer of 0-2cm sediment. 223 species or taxa of marine nematodes belonging to 145 genera, 32 families and 4 orders were identified for the first time in the region. The most dominant species were Dorylaimopsis rabalaisi, Terschellingia longicaudata, Sphaerolaimus balticus, Quadricoma scanica, Paramonohystera riemanni, Vasostoma spiratum and Promonhystera faber. Non-selective deposit feeders and selective deposit feeders occupied 45.7%. The analysis of 2630 individuals randomly selected from 6 stations show that the age structure of nematodes was roughly in balance, and the reproduction could occur even in the winter. MDS (Multi-Dimensional Scaling) analysis showed that the community structures at different stations were similar to each other, being a cold-water community in muddy subtidal zone. The abundance and species were positively related strongly to water temperature and salinity, as well as to organic matter and sand contents, and so was between the diversity and Chl-α & Pha-α concentrations. |
| Key words: Marine nematode, Benthic ecology, Community structure, The Yellow Sea |
