论文部分内容阅读
于1995年6－9月间在施肥鱼贝混养生态系中，实验研究了搭配养殖菲律宾蛤仔对浮游生物的效应和浮游生物对菲律宾蛤仔养殖的影响。在浮游生物群落构成方面，菲律宾蛤仔使蓝藻、甲藻和浮游挠足类显著减少。对生物量和初级生产力的影响程度与养殖密度有关，而浮游生物丰度和初级生产力在时间上的变化又与营养盐有关。贝类对浮游生物群落结构和初级生产力的影响可以在一定程度上改善水质。浮游生物丰度和初级生产力与菲律宾蛤仔生产量和养殖生物对氮的利用率呈显著的正相关关系。此结果也表明，在该生态系中贝类生产主要依靠牧食链。
In June-September 1995 in the mixed culture of fertilized fish and shellfish ecosystem, experimentally studied the effect of collocated Philippine clams on the plankton and the impact of plankton on the culture of Philippine clams. In terms of plankton community composition, P. clarkii significantly reduced cyanobacteria, dinoflagellates and planktonic parachutes. The impact on biomass and primary productivity is related to stocking density, while changes in plankton abundance and primary productivity over time are related to nutrients. The impact of shellfish on plankton community structure and primary productivity can improve water quality to a certain extent. Phytoplankton abundance and primary productivity had a significant positive correlation with the production of Ruditapes philippinarum and the utilization of nitrogen by the cultured organisms. This result also shows that shellfish production in this ecosystem depends mainly on grazing chains.