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하구언 담수방류와 영산강 하구 식물플랑크톤 생체량 및 환경인자의 장기변동
윤보배 ( Bo Bae Yoon ),이어진 ( Eo Jin Lee ),강태안 ( Tae Ahn Kang ),신용식 ( Yong Sik Shin ) 한국하천호수학회 2013 생태와 환경 Vol.46 No.2
In Yeongsan River estuary, located in the southern West Coast, a dike was constructed in December 1981. After the construction of a dike, discharge mechanism of fresh water has been changed, the water quality and chlorophyll-a are expected to be influenced by fresh water discharge. We investigated temporal and spatial variations and long-term trend of phytoplankton biomass (chlorophyll-a) and environmental factors. The concentrations of nutrient and chlorophyll-a were generally high in summer and the concentrations were increased toward downstream. Surface/bottom salinity difference was negatively correlated with salinity in surface water but positively with nutrient and chlorophyll-a. TN, TP and DIN concentrations were generally increased over 10 years. This study can provide information for better management of water quality for Youngsan River estuary.
하구언 건설 전,후의 영산강 하구 식물플랑크톤 군집 및 환경 변화
신용식 ( Yong Sik Shin ),윤보배 ( Bo Bae Yoon ) 한국환경생물학회 2011 환경생물 : 환경생물학회지 Vol.29 No.3
The Yeongsan River estuary, located in the south west coast, was a typical estuary before a dike was constructed in December 1981. After the construction, the water quality and plankton communities are expected to change. We investigated the change of phytoplankton community and environmental properties in the Yeongsan River estuary by comparing the data collected recently with the results reported before and/or shortly after the construction. Concentrations of NH4 N were significantly increased in the freshwater zone. Concentrations of DO at the surface, NO2+NO3 and NH4 N were increased while the concentrations of PO4 at the surface were decreased in the seawater zone. The number of green algae species was decreased in the freshwater zone. The number of diatom species was decreased while the numbers of green algae and dinoflagellates were increased in the seawater zone. This study can provide information for better management of the Yeongsan River estuary since no comparison study has been documented between the phytoplankton community before and after the construction of the dike in the estuary.