Korean Journal of Ecology and Environment (생태와환경)

The Korean Society of Limnology (한국수생태학회)
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Effect of Light : Nutrients Ratio on the Zooplankton and Phytoplankton Community

동.식물플랑크톤 군집에 미치는 빛 : 영양염 비의 영향

  • Jun, Man-Sig (National Kangwon Development Research Institute) ;
  • Ryu, Kwang-Hyun (Environment of Engineering, Kumoh National Institute of Technology) ;
  • Kim, Moon-Sook (National Kangwon Development Research Institute) ;
  • Park, Ju-Hyun (National Institute of Environmental Research) ;
  • Park, Je-Chul (Environment of Engineering, Kumoh National Institute of Technology)
  • Published : 2009.09.30
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Abstract

This study was conducted to identify the influences of light-to-nutrients ratio on the zooplankton and phytoplankton community. Various experiment conditions such as HL (high-light and without zooplankton), HLZ (high-light and with zooplankton), LL (low-light and without zooplankton), and LLZ (low-light and with zooplankton) were adjusted. Changes in biomass of phytoplankton species with the incubation time showed a similar tendency in the continuous cultures, but the change of species composition in the continuous cultures was detected. Cyanophyeeae (Phormidium sp.) seems to be affected by the existence of zooplankton. Also, the predominant species were Chlorophyceae (Staurastrum spp., S. dorsidentiferum, Coelastrum cambricam, Chlorella sp., Krichnerialla sp.) in a high-light environment and Bacillariophyceae (Melosyra granulata, Synedra acus, Fragilaria crotonensis) in a high-light environment. The estimated mean POC concentration (after twenty days) in a high-light environment was two times higher than that for a low-light environment. P : C ratio of seston component in a low-light environment was higher than that for a high-light environment. Changes in biomass of zooplankton species during the incubation time were higher than that for a high-light environment.

본 연구에서는 식물플랑크톤 종조성, 동물플랑크톤 증식 및 먹이망 구조에 미치는 빛 : 영양염 비에 대한 영향을 알아보았다. 실험조건은 빛 에너지의 강약과 동물플랑크톤 유무(약광 LL, 약광+동물플랑크톤 LLZ, 강광: HL, 강광+동물플랑크톤: HLZ)등의 다양한 방법으로 조절하였다. 배양시간에 따른 식물플랑크톤의 총 현존량을 모든 배양조건에서 유사한 경향을 보였으나, 종조성은 배양조건에 따라 차이를 보였다. 녹조류(Staurastrum spp., S. dorsidentiferum, Coelastrum cambricam, Chlorella sp., Krichnerialla sp.)는 강광의 조건에서, 규조류(Melosyra granulata, Synedra acus, Fragilaria arotonensis)는 약광의 조건에서 우점하는 것으로 나타났지만, 남조류(Phormidium sp.)는 포식자에 의한 영향을 크게 받는 것으로 조사되었다. 강광 조건에서의 평균 POC 농도(20일 이후)는 약광의 조건보다 약 2배 높은 농도를 보였다. 반면에 seston의 P/C비는 약광의 조건이 강광의 조건보다 높게 나타났다. 배양시간에 따른 동물플랑크톤의 총 현존량은 강광의 조건이 약광의 조건보다 높게 나타났다.

Keywords

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