东海大型底栖生物次级生产力研究

根据2000年秋季和2001年春季在东海23个大面站进行的大型底栖生物定量采集样品资料，利用Brey’s（1990）的经验公式对调查海区进行了大型底栖生物栖息密度、生物量、次级生产力和P／B值的研究和计算．结果表明，该海域大型底栖生物平均栖息密度在秋季为87m^-2，远低于春季的138m^-2，而平均生物量以去灰干重计，秋季为1．40gm^-2，高于春季的1．25gm^-2；年平均次级生产力以去灰干重计，为1．62gm^-2a^-1，远低于渤海和南黄海．研究表明，大型底栖生物生物量和次级生产力受水温和水深的影响，平均P／B值在研究海域为1．41a^-1，高于渤海和黄海，表明在东海大型底栖生物中个体小而代谢快、生活史短的种在大型底栖生物中占的比重要大于渤海和南黄海，P／B值随水温升高而升高，图2表2参28

SECONDARY PRODUCTION OF MACROBENTHOS FROM THE EAST CHINA SEA

Based on the data obtained from 23 stations in autumn of 2000 and spring of 2001, we calculated the secondary production of macrobenthos from the East China Sea with Brey's (1990) empirical formula. The results showed that the mean abundance in autumn (2000) was 87 ind. m-2, lower than that in spring (2001), 138 ind. m-2; the mean biomass in AFDW in autumn was 1.40 g m-2, higher than that (1.25 g m-2) in spring; the mean annual secondary production in the study area was 1.62 g (AFDW) m2 a-1, much lower than those in the Bohai Bay and the south Yellow Sea. The production of macrobenthos should be affected by water temperature and water depth. The average annual macrobenthic P/B ratio was 1.41 a-1, higher than those in the Bohai Bay and the south Yellow Sea, showing that the species of small body size and high renewal occupied a greater proportion in macrobenthos in the East China Sea than those in the Bohai Bay and the south Yellow Sea. P/B ratio increased exponentially with water temperature. Fig 2, Tab 2, Ref 28