도암호 탁수 영향에 따른 동물플랑크톤의 시･공간적인 변동 특성 (Characteristics of Seasonal and Temporal Variation of Zooplankton Community by Turbid Water in Lake Doam)

서지정보

· 발행기관 : 강원대학교 농업생명과학연구원
· 수록지 정보 : 농업생명환경연구 / 35권 / 1호 / 98 ~ 110페이지
· 저자명 : 이재용, 장창원, 최재석, 김영길, 허우명, 박은경, 천재룡, 김윤희

초록

In this study, we conducted 12 seasonal surveys between 2016 and 2018 to understand spatial and temporal fluctuations of the zooplankton community structure in Lake Doam when exposed to the effects of surface discharge. The total number of species identified was 29 in 2016, 34 in 2017, and 25 in 2018. The total abundances were 1,942.3 ind/L (70.9 ind/L－374.1 ind/L) in 2016, 2,852.6 ind/L (47.2 ind/L–906.5 ind/L) in 2017, and 985.5 ind/L (10.4 ind/L–312.5 ind/L) in 2018. The fluctuations in community structure during the study period were related to the inflow of turbid water due to monsoon rainfall, which formed a thick layer of turbid water. This layer first formed in Lake Doam during the summer in 2016 and 2017 and persisted into the following year.
Consequently, the community structure of zooplankton changed toward smaller species. Rotifera was the dominant phylum, with the most common zooplanktons (33 species; 68.8%), followed by Copepoda (8; 16.7%), Cladocera (4; 8.3%), and Protozoa (3; 6.3%). A clear water phase, with a weak turbid layer and stable thermal stratification, was only observed in June 2017, which resulted in the dominance of Daphnia galeata. Therefore, the structural changes in zooplankton communities in Lake Doam seem to be related to hydraulic and hydrological factors such as rainfall patterns and the duration of a turbid water layer. The change in the zooplankton community structure would be a useful indicator for reflecting turbidity duration and discharge characteristics in lake ecosystems. The emergence of macrozooplankton may also be a good indicator for determining the water quality characteristics of lake ecosystems.

영어초록

In this study, we conducted 12 seasonal surveys between 2016 and 2018 to understand spatial and temporal fluctuations of the zooplankton community structure in Lake Doam when exposed to the effects of surface discharge. The total number of species identified was 29 in 2016, 34 in 2017, and 25 in 2018. The total abundances were 1,942.3 ind/L (70.9 ind/L－374.1 ind/L) in 2016, 2,852.6 ind/L (47.2 ind/L–906.5 ind/L) in 2017, and 985.5 ind/L (10.4 ind/L–312.5 ind/L) in 2018. The fluctuations in community structure during the study period were related to the inflow of turbid water due to monsoon rainfall, which formed a thick layer of turbid water. This layer first formed in Lake Doam during the summer in 2016 and 2017 and persisted into the following year.
Consequently, the community structure of zooplankton changed toward smaller species. Rotifera was the dominant phylum, with the most common zooplanktons (33 species; 68.8%), followed by Copepoda (8; 16.7%), Cladocera (4; 8.3%), and Protozoa (3; 6.3%). A clear water phase, with a weak turbid layer and stable thermal stratification, was only observed in June 2017, which resulted in the dominance of Daphnia galeata. Therefore, the structural changes in zooplankton communities in Lake Doam seem to be related to hydraulic and hydrological factors such as rainfall patterns and the duration of a turbid water layer. The change in the zooplankton community structure would be a useful indicator for reflecting turbidity duration and discharge characteristics in lake ecosystems. The emergence of macrozooplankton may also be a good indicator for determining the water quality characteristics of lake ecosystems.

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