Attenuation of photosynthetically available radiation by chlorophyll, chromophoric dissolved organic matter, and tripton in lake Donghu, China

Yang, Hong, Xie, Ping, Xing, Yangping, Ni, Leyi and Guo, Hongtao (2005) Attenuation of photosynthetically available radiation by chlorophyll, chromophoric dissolved organic matter, and tripton in lake Donghu, China. Journal of Freshwater Ecology, 20, 575-581.

Abstract

The attenuation coefficient of photosynthetically available radiation [Kd(PAR)] and three water quality parameters [chlorophyll a (chl a)], chromophoric dissolved
organic matter (CDOM) and tripton) were measured at three stations in shallow, subtropical Lake Donghu from April 2003 to March 2004. The multiple regression
equation of &(PAR) versus chl a, CDOM, and tripton was: Kd(PAR) = 0.44 + 0.019 chla + 1.88 CDOM + 0.016 tripton, which revealed the relative contributions of the three
parameters to Kd(PAR). The effects of water and CDOM on Kd(PAR) were of minor importance (19-26%), while chl a and tripton were the two greatest contributors,
accounting collectively for 74-8 1 %.

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