渤海湾近岸底栖动物的生物量粒径谱研究

Biomass size spectra of zoobenthos in coastal area of Bohai Bay, China

对渤海湾近岸海域进行底栖动物的调查和分析,选择其中4个重点站位进行底栖生物的生物量粒径谱(Sheldon粒径谱)和正态化生物量粒径谱研究.粒径谱分析所需的生物量干重值由经验公式和转换参数估算得到.Sheldon粒径谱结果表明:生物量显示出由小型底栖动物向大型底栖动物递增的趋势,峰型结构复杂,站位间出现波峰和波谷的粒级存在差异,且波峰数量和我国其他海域的结果也存在差异.正态化生物量粒径谱结果表明:研究海域内底栖动物正态化生物量粒径谱的斜率范围为-0.753 7～-0.644 7,在我国近海海域中属于偏高水平,说明渤海湾近岸海域内营养循环的效率较高;该粒径谱的截距为13.316～14.449,表明研究海域的生产量低于东海、黄海和黄河口的生产量,而与南黄海基本持平.

The survey of macro- and meiofaunal communities was carried out in the coastal area of Bohai Bay, China in July, 2006 with the help of Chinese Offshore Investigation and Assessment Project. Four emphasized stations of this survey were selected to perform the studies on biomass size spectra （BSS） and normalized biomass size spectra （NBSS）. The dry weight data of marine benthos were evaluated from the experiential formula and conversion parameters. The results of Shel- don size spectra （BSS） displayed an increasing trend of biomass from meiofauna to macro-fauna, and the troughs and peaks of BSS also showed complex characters. The size-class showing the trough or peak varied with the stations, the peak numbers were also different from other results in Chinese offshore area. The slopes of NBSS ranged from -0.753 7 to -0.644 7, and the intercepts ranged from 13.316 to 14.449. The slope values were higher than that of most other area of Chinese offshore area, and it stood for a higher circulatory efficiency of nutrients in Bohai Bay. On the other hand, the in- tercept values inferred that the production in Bohai Bay was lower than that of East China Sea, Yellow Sea and the Huanghe River adjacent area, but almost had the same production with Southern Yellow Sea.