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The determination of mineralization losses in correlation with the estimation of net primary production with the oxygen method and chemical inhibitors
Author(s) -
GOLTERMAN H. L.
Publication year - 1971
Publication title -
freshwater biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.297
H-Index - 156
eISSN - 1365-2427
pISSN - 0046-5070
DOI - 10.1111/j.1365-2427.1971.tb01561.x
Subject(s) - mineralization (soil science) , oxygen , respiration , particulates , environmental chemistry , primary production , nitrogen , chemistry , eutrophication , environmental science , aeration , bottle , ecology , biology , botany , ecosystem , nutrient , organic chemistry , mechanical engineering , engineering
Summary In samples of eutrophic lake water incubated during a few days with dinitrophenol it was found that the decrease of particulate‐carbon was about equal to the decrease of the particulate‐nitrogen (in %) and was lower than the simultaneous O2‐consumption. The measured mineralization appeared to be strongly temperature‐dependent and nearly stopped at 3°C. These facts suggest that the mineralization of the particulate material is caused by a bacterial process and not only by respiration. It means, that only part of the O2 consumption in darkness (overnight) should be subtracted from the net algal production in the light to estimate the net daily production. Further, it could be demonstrated with samples incubated with DCMU that the oxygen consumption in hght bottles is larger than in the dark bottle. The two effects work in the same direction as they both increase the results of the calculation of daily primary production from the field observations.