东、黄海典型站位底栖动物粒径谱研究  

Research on biomass size spectra of macro- and meiofuana at typical stations in the East China Sea and Yellow Sea

作　　者：林岿璇[1] 张志南[1] 王睿照[1] 

机构地区：[1]中国海洋大学生命学院,青岛266003

出　　处：《生态学报》2004年第2期241-245,共5页Acta Ecologica Sinica

基　　金：国家重点基础研究发展规划"973"资助项目 (G19990 43 70 9) ;国家自然科学基金资助项目 (4 0 1760 3 3 )~~

摘　　要：对东、黄海典型站位底栖动物粒径谱进行了首次研究 ,得出 Sheldon粒径谱呈典型的双峰模式 ,两个峰形分别对应着大型底栖动物和小型底栖动物的生物量分布。小型底栖动物峰值出现在粒级 6～ 10 ,大型底栖动物峰值在 13～ 14。两峰值之间的波谷位置在粒级 10～ 11,是大型、小型底栖动物的过渡带 ,生物量主要由大型动物的幼龄个体构成。E3站大型动物幼龄个体大量出现 ,使该站的过渡粒级上出现峰值 ,粒径谱呈单峰形。同时构建了正态化粒径谱 ,在此基础上对不同生态系统的比较进行了初步尝试。Traditional taxon-based approaches to the study of marine benthic assemblages are time consuming activities and require considerable expertise. The biomass size spectrum, which considers only the size of organisms, is a useful and practical alternative for ecologists. It was introduced by Sheldon et al. in 1972 to describe features of marine pelagic ecosystems. Schwinghamer was the first to extend this idea to benthic assemblages. He found a conservative pattern in size-class spectra with distinct maxima within the total benthic community. The biomass size-spectrum has now become an important tool to the description of ecosystem structure.A series of 5 stations in the East China Sea and Yellow Sea were sampled during a survey from September 10 to 29, 2002. Sediment samples were collected with a 0.1m^2 Gray-O'hara box-corer. Macrofauna samples were sieved onto 0.5mm mesh and organisms were preserved in 10% formalin solution. In the laboratory, organisms were counted under dissecting microscope and weighed separately with an electronic balance. Subsamples were collected with a 26 mm diameter syringe to a depth of 11cm and fixed in 5% formalin solution for meiofauna analysis. After Ludox extraction by centrifuging, sieving and enumerating,the volume of each organism was measured using a microscope. Volume was converted into weight and equivalent spherical diameter (ESD). In Sheldon size spectrum, the horizontal axis was scaled by ESD (size class),and vertical axis was the total biomass in each size interval. A normalized size-spectrum was determined by regressing the log_2[(total biomass in size class)/(weight range of the interval)] against the log_2 of the upper limit of the size class.The patterns of Sheldon size spectra were similar at four stations, but not at station E3. Two peaks occurred at size classes 6～10 and 13～14. They were separated by typically low biomass at size class 10～11. Two peaks corresponded to meiofauna and macrofauna respectively. The results of this study supported the typical bimod

关 键 词：位径谱 大型底栖动物 小型底栖动物 生态系统 东、黄海 

分 类 号：Q958[生物学—动物学]