도암만 식물플랑크톤 군집의 시ㆍ공간 및 경시적 변동과 출현 특성 (The Variations of Spatio-temporal and Time Series on Phytoplankton Community in Doam Bay, Southwestern Sea of Korea)

서지정보

· 발행기관 : 한국조류학회I
· 수록지 정보 : 수생생물 / 2권 / 1호 / 1 ~ 20페이지
· 저자명 : 윤양호, 이현지, 박종식, 서호영

초록

도암만 식물플랑크톤 군집의 시ㆍ공간적 변동 특성을 파악하기 위해 2018년 5월에서 2019년 2월까지 4회 조사 및 분석하였다. 결과, 동정된 식물플랑크톤 종은 45속 77종으로 다조로웠고, 규조류가 다양하였다. 현존량은 0.3-1,827.4 cells/mL 범위로, 봄 11.7±13.4 cells/mL, 여름 600.1±376.2 cells/mL, 가을 45.8±125.6 cells/mL 그리고 겨울 58.3±66.7 cells/mL 변동 폭으로 여름에 높고, 봄에 낮았다. 우점종은 봄 Paralia sulcata, Skeletonmea costatum-Is, Rizosolenia setigera, 여름 Cheatoceros curvisetus, S. costatum-Is, 가을 S. costatum-Is, Thalassiosira subtilis, Thalassiosira. rotula. 그리고 겨울은 Ch. curvisetus, Ch. socialis, Leptocylindrus danicus, S. costatum-Is로, 연중 중심목 규조류가 우점하였고, 특히 S. costatum-Is는 겨울 4.5% 우점율을 제외하면, 우점율이 높았다. 즉 도암만은 상대적 낮은 식물플랑크톤 현존량에 단순한 종 조성을 보이는 내만과 생물량이 높으면서 다양한 종 조성을 보이는 만 입구로 구분되며, 높은 우점율에서 연중 특정 종에 지배되는 군집구조를 나타내었다. 두 해역 경계는 강우가 많은 계절은 중앙부에서 남쪽으로 확장되지만, 강수가 적은 계절은 북쪽으로 축소되었다. 또한 시계열분석 결과, 댐 건설 이후 도암만은 식물플랑크톤 종 다양성은 감소하였고, 현존량은 증가하는 등 급격한 환경변화가 의심되었다.

영어초록

A survey was conducted to analyze to spatio-temporal distribution of phytoplankton community in Doam Bay from May 2018 to February 2019. As a results, the identified phytoplankton was 77 species belonging to 45 genera, especially the appearance of diatoms varied. The total phytoplankton standing crop varied in the ranged of 0.3 cells/mL to 1,827.4 cells/mL, showing a large fluctuations, and seasonal variations were 11.7±13.4 cells/mL in spring, 600.1±376.2 cells/mL in summer, 45.8±125.6 cells/mL in autumn and 58.3±66.7 cells/mL in winter, high in summer and low in spring. The dominant species had relatively clear seasonal variations, with Paralia sulcata, Skeletonema costuatum-Is, Rhizosolenia setigera in spring, Cheatoceros curvisetus, S. costatum-Is in summer, S. costatum-Is, Thalassiosira subtilis, Th. rotula in autumn and Ch. curvisetus, Ch. socialis, Leptocylindrus danicus, S. costaum-Is in winter, and centric diatoms were dominant throughout the year. In particular, S. costatum-Is showed a high dominance except for 4.5% dominance in winter. In other words, Doam Bay was divided into the inner bay, which showed low diversity and standing crop in simple species composition, and the entrance of bay, which showed high diversity and standing crop in various species composition. In addition, it showed a high dominance throughout the year, indicating a community structure dominated by a specific species. The boundary between the two regions extends from the central part to the south during the rainy seasons, but reduced to the north during the dry seasons. And a time series analysis showed that a rapid environmental changes was suspected after the construction of the dam, such as a a decrease in diversity and increase in standing crops in Doam Bay.

참고자료

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