北黄海小型底栖生物丰度和生物量时空分布特征The Spatial-Temporal Distributional Characteristics of Meiobenthic Abundance and Biomass in the Northern Yellow Sea
陈海燕,周红,慕芳红,杨世超
摘要(Abstract):
分别于2006年7月和2007年1,4和10月在北黄海陆架浅海水域进行小型底栖生物调查。结果表明,4个航次的小型底栖生物平均丰度分别为(1099±634),(664±495),(1601±837)和(524±378)ind.10 cm-2;平均生物量分别为(1446.34±764.66),(428.63±294.84),(1580.53±1041.23)和(793.50±475.83)μg.dwt.10 cm-2。共鉴定出18个小型底栖生物类群,按丰度,自由生活海洋线虫为最优势类群,4个航次的优势度分别为72%,90%,85%和74%,其他优势类群依次是桡足类、多毛类、动吻类和介形类;按生物量依次是线虫、桡足类、多毛类、介形类和双壳类。97%的小型底栖生物分布在0~5 cm的表层沉积物内,线虫和桡足类分布在0~2 cm沉积物的比例分别为86%和87%。二因素方差分析(two-way ANOVA)表明:小型底栖生物丰度和生物量在由4个航次所代表的春、夏、秋、冬各季节之间存在显著差异(春、夏高于秋、冬),在4个航次的5个相同取样站位之间也有显著差异。小型底栖生物的丰度和生物量与水深和底盐呈负相关性。北黄海冷水团对小型底栖生物丰度和生物量时空分布有一定的影响。
关键词(KeyWords): 小型底栖生物;丰度;生物量;冷水团;北黄海
基金项目(Foundation): 国家908专项项目(908-01-ST02);; 国家自然科学重点基金项目(40730847)资助
作者(Author): 陈海燕,周红,慕芳红,杨世超
DOI: 10.16441/j.cnki.hdxb.2009.04.018
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