Zhang Jing-huai, Gao Yang, Fang Hong-da
South China Sea Environmental Monitoring Center, Guangzhou 510300, China.
Ying Yong Sheng Tai Xue Bao. 2011 Oct;22(10):2741-8.
An investigation was conducted on the meiobenthic abundance and biomass in the Lingdingyang Bay of Pearl River Estuary in July-August 2006 (summer), April 2007 (spring), and October 2007 (autumn). A total of 15 meiobenthic groups were recorded, including Nematoda, Copepoda, Polychaeta, Ostracoda, Kinorhyncha, Amphipoda, Cumacea, Tanaidacea, Gnathostomulida, Nemertea, Gastropoda, Bivalvia, Sipuncula, Echiura, and other unidentified taxa. The average abundance of the meiobenthos in spring, summer, and autumn was 272.1 +/- 281.9, 165.1 +/- 147.1 and 246. 4 +/- 369.3 ind 10 cm(-2), and Nematoda was the most dominant group in abundance, accounting for 86.8%, 83.5%, and 93.4% of the total, respectively, followed by Polychaeta, and benthic Copepoda. The meiobenthic abundance had an uneven vertical distribution. 54.1% of the meibenthos were in 0-2 cm sediments, 35.2% were in 2-5 cm sediments, and 10.8% were in 5-10 cm sediments. 87.4% of nematodes were distributed in 0-5 cm sediments. The average biomass of the meiobenthos in spring, summer, and autumn was 374.6 +/- 346.9, 274.1 +/- 352.2, and 270.8 +/- 396.0 microg 10 cm(-2), and Polychaeta was the most dominant group in biomass, accounting for 30.1%, 46.7% and 46.0%, respectively, followed by Nematoda (25.2%, 20.1%, and 34.0%), and Ostracoda (20.6%, 15.3%, and 14.8%). The horizontal distribution of the meiobenthos had a trend of increasing from north to south, and being higher at east than at west. The meiobenthic abundance and biomass had significant positive correlations with water depth.
2006年7 - 8月（夏季）、2007年4月（春季）和2007年10月（秋季）对珠江口伶仃洋湾小型底栖生物的丰度和生物量进行了调查。共记录了15个小型底栖生物类群，包括线虫纲、桡足纲、多毛纲、介形纲、动吻纲、端足目、涟虫目、等足目、颚口纲、纽形动物门、腹足纲、双壳纲、星虫动物门、螠虫动物门以及其他未鉴定类群。春季、夏季和秋季小型底栖生物的平均丰度分别为272.1±281.9、165.1±147.1和246.4±369.3个·10 cm⁻²，线虫纲在丰度上是最优势类群，分别占总数的86.8%、83.5%和93.4%，其次是多毛纲和底栖桡足类。小型底栖生物的丰度垂直分布不均。54.1%的小型底栖生物分布在0 - 2 cm的沉积物中，35.2%分布在2 - 5 cm的沉积物中，10.8%分布在5 - 10 cm的沉积物中。87.4%的线虫分布在0 - 5 cm的沉积物中。春季、夏季和秋季小型底栖生物的平均生物量分别为374.6±346.9、274.1±352.2和270.8±396.0μg·10 cm⁻²，多毛纲在生物量上是最优势类群，分别占30.1%、46.7%和46.0%，其次是线虫纲（25.2%、20.1%和34.0%）和介形纲（20.6%、15.3%和14.8%）。小型底栖生物的水平分布呈现出从北向南增加、东部高于西部的趋势。小型底栖生物的丰度和生物量与水深呈显著正相关。
