증가된 이산화탄소와 수온이 연안 자가영양 식물플랑크톤 군집 구조에 미치는 영향

Abstract

The change of coastal phytoplankton community structure to the predicted ocean acidification and sea surface warming was studied using an outdoor mesocosm approach. Each enclosed mesocosm bag was filled with coastal waters from Jangmok bay in South Sea, Korea, and two sets of CO2 and temperature conditions (present: 380ppm, acidification: 980ppm, greenhouse: 980ppm and +3°C warmer than present and acidification condition) were set up. Results showed the potential possibility that future global climate changes could be significantly impacts on coastal ecosystem in temperate regions. More specifically, global climate change can alter the nutrient availability in phytoplankton species, and this result lead to the changes in phytoplankton species succession. We also found that ocean warming and acidification directly impacts on growth of phytoplankton community groups and species. In particular, small phytoplankton (autotrophic nanoflagellate and picophytoplankton) will benefit for their growth under future oceanic condition. Among diatom species, small size species such as Skeletonema costatum can profit for their growth than large diatom species under future oceanic condition. Although our studies will require further confirmation, frequency and intensity of blooms in consisted of small phytoplankton may be increase in future oceanic condition, and might thus be impacts on the marine ecosystem and aquaculture industryin South Sea, Korea, and two sets of CO2 and temperature conditions (present: 380ppm, acidification: 980ppm, greenhouse: 980ppm and +3°C warmer than present and acidification condition) were set up. Results showed the potential possibility that future global climate changes could be significantly impacts on coastal ecosystem in temperate regions. More specifically, global climate change can alter the nutrient availability in phytoplankton species, and this result lead to the changes in phytoplankton species succession. We also found that ocean warming and acidification directly impacts on growth of phytoplankton community groups and species. In particular, small phytoplankton (autotrophic nanoflagellate and picophytoplankton) will benefit for their growth under future oceanic condition. Among diatom species, small size species such as Skeletonema costatum can profit for their growth than large diatom species under future oceanic condition. Although our studies will require further confirmation, frequency and intensity of blooms in consisted of small phytoplankton may be increase in future oceanic condition, and might thus be impacts on the marine ecosystem and aquaculture industry