Temporal population dynamics of dinoflagellate Prorocentrum minimum in a semi-enclosed mariculture pond and its relationship to environmental factors and protozoan grazers  

作　　者：许恒龙 MIN Gi-Sik CHOI Joong-Ki 朱明壮 姜勇 AL-RASHEID Khaled A.S. 

机构地区：[1]Laboratory of Protozoology,KLM,Ocean University of China [2]Department of Biological Sciences,Inha University [3]Department of Oceanography,Inha University [4]Zoology Department,King Saud University

出　　处：《Chinese Journal of Oceanology and Limnology》2010年第1期75-81,共7页中国海洋湖沼学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China (No. 40976075);a Post-Doctoral Fellowship of Inha University,a Grant from the Center of Excellence in Biodiversity Research,King Saud University and 111 project of China (No. B08049)

摘　　要：The ecological processes and interrelationships between protists,either autotrophic or heterotrophic,and environmental factors in mariculture ponds are largely unknown.This study investigated the temporal dynamics of potentially harmful dinoflagellate,Prorocentrum minimum (Pavillard) Schiller,and its relationship to physico-chemical factors and protozoan grazers over a complete cycle in a semi-enclosed shrimp-farming pond near Qingdao,Northern China.P.minimum occurred frequently in low numbers from June to August,followed by a sharp increase from the middle of August,reaching a single maximum peak value of 2.2×105 cells L-1 in October.Temporal variation in abundance was positively correlated with dissolved nitrogen,but showed a significant inverse relationship to abundance of the dominant ciliates,Tintinnopsis lohmanni and Askenasia stellaris.The results provide statistical evidence that the number of P.minimum increased with increasing nitrogen,and the suppression or shortening of algal bloom may be associated with protozoan grazers,such as Tintinnopsis lohmanni,in mariculture ponds.The ecological processes and interrelationships between protists, either autotrophic or heterotrophic, and environmental factors in mariculture ponds are largely unknown. This study investigated the temporal dynamics of potentially harmful dinoflagellate, Prorocentrum minimum （Pavillard） Schiller, and its relationship to physico-chemical factors and protozoan grazers over a complete cycle in a semi-enclosed shrimp-farming pond near Qingdao, Northern China. P. minimum occurred frequently in low numbers from June to August, followed by a sharp increase from the middle of August, reaching a single maximum peak value of 2.2×10^5 cells L^-1 in October. Temporal variation in abundance was positively correlated with dissolved nitrogen, but showed a significant inverse relationship to abundance of the dominant ciliates, Tintinnopsis lohmanni and Askenasia stellaris. The results provide statistical evidence that the number of P. minimum increased with increasing nitrogen, and the suppression or shortening of algal bloom may be associated with protozoan grazers, such as Tintinnopsis lohmanni, in mariculture ponds.

关 键 词：DINOFLAGELLATE harmful algae Prorocentrum minimum shrimp-farming 

分 类 号：S963.2[农业科学—水产养殖]