CAJ | 학술논문

2010年9月在南海北部5个深海站位和1个浅海站位进行了小型底栖动物和环境因子采样,对小型底栖动物的丰度和生物量进行了定量研究。本次调查中,共鉴定出10个小型底栖动物类群,分别是线虫、桡足类、多毛类、介形类、甲壳类幼体、异足类、寡毛类、涡虫、无板类和等足类。从丰度来看,线虫是绝对的优势类群,占总丰度百分比为94.72%；桡足类次之,占2.70%；多毛类再次,占1.62%；其他类群之和仅占0.96%。从生物量来看,线虫的生物量最大,占总生物量的53.83%；其次是多毛类,占32.17%；居生物量第三位的是桡足类,占7.14%；其他类群之和占6.85%。小型底栖动物的丰度和干重生物量分别为566.12±635.61个·(10cm2)-1和398.43±431.98μg·(10cm 2)-1,线虫的丰度和干重生物量分别为536.21±593.48个·(10cm 2)-1和214.48±237.39μg·(10cm 2)-1。研究站位线虫、桡足类、多毛类和小型底栖动物丰度,小型底栖动物生物量与环境因子的相关分析表明,影响线虫丰度、小型底栖动物丰度、小型底栖生物生物量的主要环境因子包括底层水pH值、沉积物粉砂黏土含量和有机质含量。单因素方差分析(One-way ANVOA)结果表明,线虫丰度、桡足类丰度、小型底栖动物丰度和生物量在不同站位均有显著差异。与渤海、北黄海、南黄海、长江口、芽庄湾(越南)、大亚湾、北部湾、南海近海等海域相比,本研究海域的小型底栖动物丰度和生物量偏低。
2010년9월재남해북부5개심해참위화1개천해참위진행료소형저서동물화배경인자채양,대소형저서동물적봉도화생물량진행료정량연구。본차조사중,공감정출10개소형저서동물류군,분별시선충、뇨족류、다모류、개형류、갑각류유체、이족류、과모류、와충、무판류화등족류。종봉도래간,선충시절대적우세류군,점총봉도백분비위94.72%；뇨족류차지,점2.70%；다모류재차,점1.62%；기타류군지화부점0.96%。종생물량래간,선충적생물량최대,점총생물량적53.83%；기차시다모류,점32.17%；거생물량제삼위적시뇨족류,점7.14%；기타류군지화점6.85%。소형저서동물적봉도화간중생물량분별위566.12±635.61개·(10cm2)-1화398.43±431.98μg·(10cm 2)-1,선충적봉도화간중생물량분별위536.21±593.48개·(10cm 2)-1화214.48±237.39μg·(10cm 2)-1。연구참위선충、뇨족류、다모류화소형저서동물봉도,소형저서동물생물량여배경인자적상관분석표명,영향선충봉도、소형저서동물봉도、소형저서생물생물량적주요배경인자포괄저층수pH치、침적물분사점토함량화유궤질함량。단인소방차분석(One-way ANVOA)결과표명,선충봉도、뇨족류봉도、소형저서동물봉도화생물량재불동참위균유현저차이。여발해、북황해、남황해、장강구、아장만(월남)、대아만、북부만、남해근해등해역상비,본연구해역적소형저서동물봉도화생물량편저。
Meiofauna and environmental variables were sampled and analyzed at five deep-sea stations and one shallow-sea station in the northern South China Sea in September 2010. A total of 10 taxa of meiofauna were identified, including Nematoda, Copepoda, Polychaeta, Ostracoda, nauplii, Tanaidacea, Oligochaeta, Turbellaria, Aplacophora, and Isopoda. Nematoda was the most dominant group, accounting for 94.72% of the total meiofauna abundance, followed by Copepoda (2.70%), Polychaeta (1.62%) and other taxa that only account for 0.96%. In terms of biomass, Nematoda accounts for 53.83%, followed by Polychaeta (32.17%), Copepoda (7.14%) and other taxa that account for 6.85%. The average abundance and dry biomass of meiofauna were 566.12±635.61 ind·(10cm2)-1 and 398.43±431.98 μg·(10cm2)-1, respectively. Those of Nematoda were 536.21±593.48 ind·(10cm2)-1 and 214.48±237.39 μg·(10cm2)-1, respectively. Results of correlation analysis between abundance of nematode, copepod, polychaete, total meiofauna, biomass of total meiofauna and environmental factors showed that the main factors controlling nematode abundance, meiofaunal abundance and biomass were bottom-water pH, silt-clay percentage and sediment organic matter. Results of one-way analysis of variance (ANOVA) showed that there were significant differences for nematode abundance, copepod abundance, total meiofauna abundance, and biomass at different stations. Compared with the Bohai Sea, northern Yellow Sea, southern Yellow Sea, Yangtze River Estuary, Nha Trang Bay (Vietnam), Daya Bay, Beibu Gulf, and the coastal areas of South China Sea, the abundance and biomass of meiofauna in the present study were lower.