[논문]영산강 하구역에 위치한 세 호수의 식물플랑크톤 군집 분포 특성

조현진; 나정은; 이건주; 이학영

doi:10.11614/ksl.2021.54.4.291

[국내논문] 영산강 하구역에 위치한 세 호수의 식물플랑크톤 군집 분포 특성
Characteristics of Distribution of Phytoplankton Communities in Three Estuarial Lakes of the Yeongsan River 원문보기

생태와 환경 = Korean journal of ecology and environment, v.54 no.4, 2021년, pp.291 - 302

조현진 (전남대학교 자연과학대학 생물학과) , 나정은 (전남대학교 자연과학대학 생물학과) , 이건주 (전남대학교 자연과학대학 생물과학.생명기술학과) , 이학영 (전남대학교 자연과학대학 생물학과)

초록
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본 연구는 영산강 하구에 위치한 세 호수들에서 식물플랑크톤 군집의 분포 양상 및 호소 간 군집 유사성을 확인하고 군집 구조의 차이에 영향을 미치는 요인들을 확인하고자 2014년 3월부터 2017년 11월까지 분기별 조사를 시행하였다. 조사 결과, 식물플랑크톤의 종 다양성은 영산호에서 가장 높았고, 평균 개체수는 금호호에서 가장 높았으며, 영암호는 다른 호수들에 비해 식물플랑크톤의 종수와 개체수가 낮은 것으로 확인되었다. NMDS 분석 결과, 영산호와 금호호의 식물플랑크톤 군집 분포는 뚜렷한 차이를 나타냈고, 세 호수의 식물플랑크톤 군집 분포에 영향을 미치는 요인은 수온, DO, T-N, NO₃-N, 전기전도도 등으로 확인되었다. Random Forest 분석을 통해 각 호수의 식물플랑크톤 군집에 영향을 미치는 요인을 확인한 결과, 세 호수 모두 공통적으로 NO₃-N의 영향력이 높았다. Indicator species analysis를 통해 확인된 각 호소별 지표종은 총 24종으로, 영산호에서 13종으로 가장 많았고, 영암호에서 2종으로 가장 적었으며, 호소별 지표종의 분류군이 구별되었다. SIMPER 분석 및 ANOSIM 결과, 영산호와 영암호의 식물플랑크톤 군집은 유사성을 나타내었고, 금호호의 경우 다른 호수와의 식물플랑크톤 군집이 다소 차이가 있는 것으로 확인되었다. 또한 각 호수의 지점별 식물플랑크톤 군집 유사성은 지점에 따라 차이가 있어 식물플랑크톤 군집 형성에 대해 연락수로의 영향력은 낮은 것으로 조사되었다.

Abstract ▼ AI-Helper

The phytoplankton community in the estuarine system is affected by changes of physicochemical factors easily. The present study analyzed phytoplankton community distribution and similarity, in addition to exploring factors influencing variations in phytoplankton community structure in three lakes located in the Yeongsan River estuary from March 2014 to November 2017. We carried out non-multidimensional scaling (NMDS) and random forest analysis (RF) for comparing the pattern of phytoplankton distribution and the relationship between phytoplankton distribution and environmental variables. Similarity Percentage (SIMPER) and Analysis of Similarity (ANOSIM) were performed to figure out the similarity of phytoplankton community at each site of three lakes. From NMDS, Phytoplankton community distribution differed between Yeongsan and Gumho lakes, and the factors influencing the distribution of phytoplankton communities across the three lakes were water temperature, dissolved oxygen, total nitrogen (T-N), nitrate-N (NO3-N), and conductivity. NO3-N was a key factor influencing phytoplankton community structure in the three lakes based on RF. A total of 24 species were identified as indicator species in the three lakes studied, with the highest species numbers observed in Yeongsan Lake (13) and the lowest observed in Yeongam Lake (2). According to SIMPER and ANOSIM results, the phytoplankton community in Yeongsan and Yeongam lakes were similar, and they differed from those in Gumho Lake. In addition, the phytoplankton community structure varied across the study sites in the three lakes, indicating that water channels across the lakes a minor influence phytoplankton community distribution.

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