Effect of CO2 enrichment on competition between Skeletonema costatum and Heterosigma akashiwo |
| |
| Authors: | Da Xu Bin Zhou You Wang Qing Ju Qingyun Yu Xuexi Tang |
| |
| Institution: | (1) Division of Biochemistry, Faculty of Fisheries, Nagasaki University, Bunkyo-machi 1-14, Nagasaki 852-8521, Japan;(2) Seikai National Fisheries Research Institute, 1551-8, Taira-machi, Nagasaki 851-2213, Japan;(3) Laboratory of Marine Environmental Science, Division of Marine Biological Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, Hakozaki, Fukuoka 812-8581, Japan |
| |
| Abstract: | We investigated the effect of CO2 enrichment and initial inoculum density on competition between Skeletonema costatum and Heterosigma akashiwo, two common algae seen in algal blooms. The initial inoculum density (0.2×104, 0.4×104, 0.8×104 cells/ml) had a significant effect on population growth and competition between H. akashiwo and S. costatum. The time required for population growth to reach the exponential growth phase and stationary phase decreased significantly
as the initial density increased. When the two species were cultured together, S. costatum tended to outcompete H. akashiwo, especially when present at higher initial ratios. CO2 enrichment (5 000 μl/L CO2) increased the maximum population density and carrying capacity of H. akashiwo but decreased these measures for S. costatum. Thus, CO2 enrichment favored the growth of H. akashiwo over S. costatum. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
