Journal of Plant Biology
- Volume 17 Issue 2
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- Pages.53-62
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- 1974
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- 1226-9239(pISSN)
Ecological Studies of the Lake Changjamot II. Primary Production in Lake Changjamot During Spring Season
장자못의 생태학적 연구 제II보 춘계 장자못의 기초생산
Abstract
A study was made on the primary production of Lake Changjamot during the spring season of 1973 by menas of the oxygen method. The stratification of temperature and dissolved oxygen were formed in May with the stratified structure of phytoplankton. The range of Secchi disc transparency was from 0.8m to 2.3m during the nine months of this investigation, which was begun in January, 1973. The value was lowest in early June when the phytoplankton blooming reached the peak. The concentration of PO4-P, NH3-N, NO3-N and NO3-N was reduced at the beginning of the phytoplankton blooming and increased again after May except PO4-P. It might have been caused by the inflow of the nitogenous fertilizer from the surrounding agricultural area since May when farming was started. The total amount of chlorophyll-a in the entire water column varied from 25mg/
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