霞ケ浦のヒシ群落の光合成と一次生産の季節変化

概要

論文の詳細を見る
Relationship between gross photosynthetic rate of Trapa natans L. leaves and light intensity was little influenced by temperatures ranging from 20℃ to 40℃. Seasonal changes in gross photosynthetic rate at light saturation were similar to those in biomass, with two peaks in the growing period and an abrupt decline in midsummer. Primary productivity during the growing period in 1979 of a.T. natans community in Lake Kasumigaura was estimated by gas exchange measurements and with a mathematical model. The estimated values for gross production, respiration and net production were 1168,501 and 667 g dry weight m^<-2>, respectively. The net production estimate agreed well with the estimate (606 g dry weight m^<-2>) obtained by the harvest method and was more than twice as large as the seasonal maximum biomass.
日本生態学会の論文
1984-12-30