국내 주요 강 생태계 내 동물플랑크톤의 탄소, 질소, 인 비율 해석

The amounts of carbon (C), nitrogen (N) and phosphorus (P) in relation to dry weight (D.W.) were measured in zooplankton from the large four rivers (Han R., Geum R., Yeongsan R. and Seomjin R.) during 2004~2008. The stoichiometry of total zooplankton in four river systems was highly variable. The ranges of average C, N and P-contents were 70~620 mgC mg-1 D.W., 7.1~85.5 μgN mg-1 D.W. and 2.5~7.4 μgP mg-1 D.W., respectively. The mean C:N: P atomic ratios reflected large spatial differences. The C: P and N: P ratios of the zooplankton community ranged from 38 to 392: 1 and from 4 to 65: 1 in all sampling sites. Self- Organizing Map (SOM) was applied to the survey data, and the study sites were clearly classified into 3 clusters. Clustering was largely affected by the distribution pattern of C, N, P-contents, which is related with characteristics of river systems on the basis of stoichiometry.