Temporal species distributions of planktonic protist communities in semi-enclosed mariculture waters

• 作 者: AL-RASHEID Khaled A S
• 机 构: Zoology Department, King Saud University,
• 出 处: Acta Oceanologica Sinica
• 发表日期: 2010年03期
• 关键词: enclosed shrimp waters larvae Prorocentrum farming communities Qingdao ammonia a

In order to evaluate the relationships between temporal species succession of planktonic protists and physical-chemical parameters in semi-enclosed mariculture waters, species distributions in response to environmental stress were investigated in a shrimp-farming pond near Qingdao, China during a complete shrimp-culture cycle (May to October 2002). A clear temporal succession in species distribution was found over the complete farming cycle. For example, before the introduction of the shrimp larvae there was low-variability of species distribution in the protist communities whereas during the stages immediately after, there was higher variability in species composition. Multiple linear/logistic regression analyses demonstrate that 12 protist taxa (e.g., Gyrodinium spirale, Teleaulax acuta, Prorocentrum spp. and Mesodinium pupula) were related to the nutrients, in particular ammonia and phosphates, alone or in combination with water temperature. These results suggest that temporal variations in species distribution of planktonic protist communities might be used in assessing water quality of semi-enclosed mariculture waters.

In order to evaluate the relationships between temporal species succession of planktonic protists and physical-chemical parameters in semi-enclosed mariculture waters, species distributions in response to environmental stress were investigated in a shrimp-farming pond near Qingdao, China during a complete shrimp-culture cycle (May to October 2002). A clear temporal succession in species distribution was found over over the complete farming cycle. For example, before the introduction of the shrimp larvae there was low-variability of species distribution in the protist communities but during the stages immediately after, there was higher variability in species composition. Multiple linear / logistic regression analyzes demonstrate that 12 protist taxa (eg, Gyrodinium spirale, Teleaulax acuta, Prorocentrum spp. and Mesodinium pupula) were related to the nutrients, in particular ammonia and phosphates, alone or in combination with water temperature. These results suggest that temporal varia tions in species distribution of planktonic protist communities might be used in assessing water quality of semi-enclosed mariculture waters.