가을철 광양만 식물플랑크톤의 수평 분포와추가 영양염 공급이 식물플랑크톤 성장에 미치는 영향 (The Influences of Additional Nutrients on Phytoplankton Growth and Horizontal Phytoplankton Community Distribution during the Autumn Season in Gwangyang Bay, Korea)

서지정보

· 발행기관 : 한국환경생물학회
· 수록지 정보 : 환경생물 / 32권 / 1호 / 35 ~ 48페이지
· 저자명 : 배시우, 김동선, 김영옥, 문창호, 백승호

초록

In order to estimate the effect of additional nutrients on phytoplankton growth andhorizontal phytoplankton community distribution during the autumn season in 2010 and 2011, weinvestigated the abiotic and biotic factors of surface and bottom waters at 20 stations of inner andoffshore areas in Gwangyang Bay, Korea. Also, nutrient additional experiments were conducted toassess additional nutrient effects on phytoplankton assemblage using the surface water. In both years,the total nutrients were high at the enclosed inner bay and the mouth of Seomjin River, whereas itwas low at the St.15~20 where in influenced by the surface warm water current from offshore ofthe bay. On the other hand, nano- and pico-sized Chl. a were gradually increased towards the outerbay and their trends were significant in 2011 than in 2010. The cryptophyta species occupied morethan 85% of total phytoplankton assembleges in 2010, whereas their abundance in 2011 remaindsto be 1/10 levels of 2010. Following the cryptophata species, the diatom Chaetoceros spp. and Skeletonema-like spp. were found to be dominant species. Further the biosaasy experimental results showsthat the phytoplankton biomass in the +N and +NP treatments was higher compared to control and+P treatments and its trend was significant at St.8 and St.20 where nutrient concentration werelow. Based on the bioassay and field survey, providing the high nutrients may have stimulated tophytoplankton growth such as S. costatum-like spp.. In particular, opportunistic micro-algae suchas Cryptomonas spp. were able to achieve the high biomass under the relatively mid nutrientcondition from bottom after break down of seasonal stratification in the Gwangyang Bay.

영어초록

In order to estimate the effect of additional nutrients on phytoplankton growth andhorizontal phytoplankton community distribution during the autumn season in 2010 and 2011, weinvestigated the abiotic and biotic factors of surface and bottom waters at 20 stations of inner andoffshore areas in Gwangyang Bay, Korea. Also, nutrient additional experiments were conducted toassess additional nutrient effects on phytoplankton assemblage using the surface water. In both years,the total nutrients were high at the enclosed inner bay and the mouth of Seomjin River, whereas itwas low at the St.15~20 where in influenced by the surface warm water current from offshore ofthe bay. On the other hand, nano- and pico-sized Chl. a were gradually increased towards the outerbay and their trends were significant in 2011 than in 2010. The cryptophyta species occupied morethan 85% of total phytoplankton assembleges in 2010, whereas their abundance in 2011 remaindsto be 1/10 levels of 2010. Following the cryptophata species, the diatom Chaetoceros spp. and Skeletonema-like spp. were found to be dominant species. Further the biosaasy experimental results showsthat the phytoplankton biomass in the +N and +NP treatments was higher compared to control and+P treatments and its trend was significant at St.8 and St.20 where nutrient concentration werelow. Based on the bioassay and field survey, providing the high nutrients may have stimulated tophytoplankton growth such as S. costatum-like spp.. In particular, opportunistic micro-algae suchas Cryptomonas spp. were able to achieve the high biomass under the relatively mid nutrientcondition from bottom after break down of seasonal stratification in the Gwangyang Bay.

참고자료

· 없음