Back to Search Start Over

Secondary productivity of pelagic zooplankton in lake Paldang and Lake Cheongpyeong

Secondary productivity of pelagic zooplankton in lake Paldang and Lake Cheongpyeong

Authors :
Ji-Soon Kang
Hae-Kyung Park
Sungjin Nam
Dongwoo Yang
Ga-Ram Jeong
Sangkyu Park
Sungbae Joo
Source :
Scopus-Elsevier

Abstract

We estimated monthly and annual secondary productivity of pelagic zooplankton in Lake Paldang and Lake Cheongpyong. Secondary productivity was calculated by combining estimated zooplankton biomass and biomass-specific productivity for each site and depth from March to November 2008. In addition to somatic production, we measured production of eggs and exuviae for three dominant species: Daphnia galeata, Bosmina longirostris, Cyclops sp. In terms of biomass, B. longirostris was dominant in Lake Paldang in April and May, B. longirostris showed explosive biomass growth, especially in May. In June and July, B. longirostris and D. galeata were both dominant. Lake Cheongpyeong showed much lower zooplankton biomass than Lake Paldang. In August, there was little or no biomass in both lakes probably due to heavy rain. The Gyeongan River contributed most of the secondary productivity and B. longirostris contributed the most secondary productivity in Lake Paldang. D. galeata also contributed in the Gyeongan River, the South Han River and at the Paldang Dam in spring and fall. Overall, Lake Cheongpyeong showed lower secondary productivity than Lake Paldang. B. longirostris made the largest contribution to secondary productivity in the Cheongpyeong Dam area while D. galeata contributed the most near Nami Island. Somatic production constituted ~80% of the total secondary productivity (the sum of somatic, egg and exuvia production) for D. galeata and B. longirostris. Although production-to-biomass (P/B) ratios were usually

Details

Database :
OpenAIRE
Journal :
Scopus-Elsevier
Accession number :
edsair.doi.dedup.....0479baac34a812f05d9de9c86c1bde4e