Korean Journal of Ecology and Environment (생태와환경)

The Korean Society of Limnology (한국수생태학회)
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Time Series Patterns and Clustering of Rotifer Community in Relation with Topographical Characteristics in Lentic Ecosystems

정수생태계의 지형적인 요인 변화와 윤충류 출현 종 수 및 개체군 밀도 변동에 대한 연구

  • Oh, Hye-Ji (Department of Environmental Science and Engineering, Kyung Hee University) ;
  • Heo, Yu-Ji (Department of Environmental Education, Sunchon National University) ;
  • Chang, Kwang-Hyeon (Department of Environmental Science and Engineering, Kyung Hee University) ;
  • Kim, Hyun-Woo (Department of Environmental Education, Sunchon National University)
  • 오혜지 (경희대학교 환경학및환경공학과) ;
  • 허유지 (순천대학교 환경교육학과) ;
  • 장광현 (경희대학교 환경학및환경공학과) ;
  • 김현우 (순천대학교 환경교육학과)
  • Received : 2021.12.15
  • Accepted : 2021.12.22
  • Published : 2021.12.31
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Abstract

The time series data of rotifer community focusing on the species number and total density were collected from 29 reservoirs located at Jeonnam Province from 2008 to 2016 quarterly. The reservoirs had similar weather condition during the study period, but their sizes and water qualities were different. To analyze the temporal dynamics of rotifer community, the medians, ranges, outliers and coefficient of variation (CV) value of rotifer species number and abundance were compared. For the temporal trend analysis, time series of each reservoir data were compared and clustered using the dynamic time warping function of the R package "dtwclust". Small-sized reservoirs showed higher variability in rotifer abundance with more frequent outliers than large-sized reservoirs. On the other hand, apparent pattern was not observed for the rotifer species number. For the temporal pattern of rotifer density, COD, phytoplankton abundance fluctuation, and cladoceran abundance fluctuation have been suggested as potential factor affecting the rotifer abundance dynamics.

본 연구에서는 호소의 환경 특성 및 시간에 따른 동물 플랑크톤 윤충류 군집 변동 특성을 분석하기 위해, 전라남도에 위치하여 유사한 기상 조건을 가지나 규모와 수질 환경이 서로 다른 29개 호소를 선정, 2008년부터 2016년까지 분기별 윤충류 출현 개체수 및 종 수의 시계열 자료를 수집하였다. 조사기간 중 각 호소의 윤충류 출현 개체수 및 종 수의 범위, 이상치 및 변동계수(CV)를 비교하였으며, 동적 시간 워핑(dtw) 분석을 통해 각 호소의 윤충류 군집 시계열 경향을 비교하여 유사 정도를 바탕으로 분류(clustering)하고, 주성분 분석을 통해 분류된 호소의 환경 특성과의 관계를 분석하였다. 윤충류 개체수에서 보다 빈번한 이상치 출현과 높은 변동성을 보인 호소에는 상대적으로 저수용량이 적은 소규모 호소가 많았던 반면, 출현종 수에서는 뚜렷한 경향이 관찰되지 않았다. 타 호소들과 윤충류 개체수의 시간적 변동 경향이 상이하게 나타난 일부 호소들에서 화학적 산소 요구량(COD)과 양의 상관관계를, 식물플랑크톤 현존량 변동 및 지각류 상대풍부도 변동과 음의 상관관계를 갖는 것으로 나타나 윤충류 출현 개체수의 시계열 경향에 영향을 미치는 잠재적인 요인으로 분석되었다.

Keywords

Acknowledgement

본 연구는 영산강유역환경청에서 시행한 "21년 영산강 섬진강 수계 호소환경조사"의 일환으로 수행되었습니다.

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