作　　者： ; ; ; ; ;

机构地区： 广东海洋大学

出　　处： 《水产科学》 2010年第5期260-264,共5页

摘　　要： 采用室内营养加富法研究了2008年流沙湾春季和夏季营养限制状况。结果表明,春季和夏季N、P、Si、Fe等单营养添加缸浮游植物均无显著的促进效应,与对照差异不显著;而N、P和N、P、Si多营养添加缸均显著促进了浮游植物的增长。其中春季N、P缸和N、P、Si缸浮游植物叶绿素a最大生物量分别为49.9 mg/m3和38.4 mg/m3,夏季N、P缸和N、P、Si缸叶绿素a最大生物量分别达14.2mg/m3和49.4 mg/m3。N、P协同限制流沙湾浮游植物生长;流沙湾大规模高密度贝类养殖导致的营养沉降作用和大型藻类和海草类生物代谢作用可能是造成流沙湾浮游植物营养限制的主要因素。流沙湾浮游植物受到养殖贝类高摄食压力及海域低营养供给共同作用,导致生态系统结构不平衡。 Nutrient limitation of phytoplankton was studied in the water collected from Liusha Bay in spring and summer of 2008 by indoor nutrient addition experiments. The results showed that there was no significant promotion between the control and the single nutrient addition treatment of nitrogen, phosphorus, silicon and iron in both spring and summer; but multiple nutrient addition treatment of nitrogen, phosphorus and nitrogen, phosphorus plus silicon significantly promoted the growth of the phytoplankton, the maximal concentration of chlorophyll-a in the nitrogen plus phosphorus treatment and nitrogen, phosphorus plus silicon treatment reaching to 49.86 mg/m3 and 38.38 mg/m3 in spring, and corresponding concentration 14.17 mg/m3 and 49.39 mg/m3 in summer. Liusha bay was found under the co-limitation of both nitrogen and phosphorus. Nutrition sedimentation due to large-scale high-density shellfish culture and the large-scale macroalgae and sea weed metabolism were considered to be the main factors of nutrient limitation in Liusha Bay. Phytoplankton in Liusha Bay was affected by high feeding pressure of shellfish culture and low nutrient supply to the bay, leading to an imbalance of ecosystem, and appealing to rational planning capacity of shellfish culture.

关 键 词： 流沙湾 浮游植物 营养添加 营养限制

领　　域： [农业科学] [农业科学]