Effect of CO2 enrichment on competition between Skeletonema costatum and Heterosigma akashiwo

• Published in: Chinese journal of oceanology and limnology Vol. 28; no. 4; pp. 933 - 939
• Main Author: 徐达 周斌 王悠 鞠青 于庆云 唐学玺
• Format: Journal Article
• Language: English
• Published: Heidelberg SP Science Press 01.07.2010; Springer Nature B.V
• Subjects: Algae; Algal blooms; Carbon dioxide; Carrying capacity; CO2加富; CO2施肥; CO2浓度增高; Competition; Earth and Environmental Science; Earth Sciences; Enrichment; Eutrophication; Growth; Heterosigma akashiwo; Inoculum; Oceanography; Plankton blooms; Plant growth; Plant populations; Population density; Population dynamics; Population growth; Skeletonema costatum; Stationary phase; 中肋骨条藻; 人口增长; 接种密度; 赤潮异弯藻; enrichment; marine microalgae; CO; population competition; red tide microalgae
• ISSN: 0254-4059; 2096-5508; 1993-5005; 2523-3521
• DOI: 10.1007/s00343-010-9071-9

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（0.2×10^4,0.4×10^4,0.8×10^4 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 000μl/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.