北海营盘新珍珠贝养殖区浮游植物现状调查

于2010-2011年按季节在北海营盘新珍珠贝养殖区海域进行了4次调查采样，对该海域的浮游植物进行了初步研究。结果表明：该海域共有浮游植物36属82 种，春季以细柱藻属占优，夏季以海链藻属占优，秋季以角毛藻属占优，冬季以菱形藻属和海链藻属占优。各季节各站位浮游植物数量变化范围在2.8×104～9.6×104cells/ml，均位于同一数量级，多样性指数范围在2.54～2.94之间，均匀度在0.47～0.55之间，水质处于轻度污染状态，作为规划的珍珠贝养殖区，该海域饵料生物数量偏低，是规划时需要考虑的因素。

Investigation and Analysis of Phytoplankton in New Pearl Oyster Culture Area of Beihai Yingpan

From 2010 to 2011,four sampling surveys were conducted in the new pearl oyster culture zone in Yingpan,Beihai City in sequence of seasons,to investigate the species and distribution of phytoplankton.The result indicated that the above-mentioned marine area harboured 82 species of phytoplankton falling into 36 genera,Leptocylindrus dominant in spring,Thalassiosira in summer,Chaetoceros in autumn,Nitzschia and Thalassiosira dominant in winter.Each season,phytoplankton quantity in each station ranged 2.8×104-9.6×104 cells/L,on the same order of magnitude;diversity indices were 2.54-2.94;evenness indices were 0.47-0.55,water quality was in a state of slight pollution.Biomass of bait in the new pearl oyster culture zone was on the low side as a programmed pearl oyster culture zone,which needs to be taken into consideration.