基于磷酸盐浓度和起始细胞密度的沃氏藻与塔玛亚历山大藻种间竞争研究  

The Interspecific Competiton Between Woloszynskia sp. and Alexandrium tamarense:Influence of Phosphate Concentration and Initial Cell Density

作　　者：杨阳[1] 李炳乾[1] 陈长平[1] 梁君荣[1] 杨清良[2] 高亚辉[1] 

机构地区：[1]厦门大学生命科学学院,福建厦门361005 [2]国家海洋局第三海洋研究所,福建厦门361005

出　　处：《厦门大学学报（自然科学版）》2008年第A02期162-168,172,共8页Journal of Xiamen University：Natural Science

基　　金：国家重点基础研究发展规划项目(2005CB422305);国家908专项(908-01-ZH3);福建省自然科学基金(2006J0145)资助

摘　　要：以分离自厦门港船舶压舱水箱及沉积底泥中的一种潜在入侵藻类—沃氏藻(Woloszynskiasp.)MMDL3013和一种常见有害赤潮藻—塔玛亚历山大藻(Alexandrium tamarense(Lebour)Balech)MMDL3041为研究对象,采用半连续培养的方法研究了不同磷酸盐浓度和藻类不同起始细胞密度两因子对这两种藻种间竞争的影响.结果表明,在磷酸盐限制条件下,沃氏藻为竞争的优势种,沃氏藻和塔玛亚历山大藻表现为资源利用性竞争;而在磷酸盐丰富的环境中种间竞争具有藻类细胞密度依赖性,起始细胞密度的不同可以影响竞争的结果.The effects of both phosphate concentration and initial cell density on population growth and interspecific competition between an invasive species Woloszynskia sp. MMDL3013 isolated from the ballast sediment of ships at Xiamen Port and one of the known harmful alga Alexandrium tamarense MMDL3041 were investigated in the present paper by semi-continuous culture method. The results showed that the interspecific competition between the two algal species under low phosphate conditions was resource-exploiting competition, and Woloszynskia sp. was the dominant species. However, the interspecific competition depended on the initial cell density when they were in high phosphate concentration.

关 键 词：沃氏藻 塔玛亚历山大藻 种间竞争 磷酸盐 细胞密度 

分 类 号：Q949.2[生物学—植物学]