Interractions in the Detritus - Dissolved Organic Matterстатья
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Дата последнего поиска статьи во внешних источниках: 4 июня 2021 г.
Аннотация:Abstract—Results from decades-long authors’ research on the natural ecosystems of several freshwater water bodiesin the Central Region of the European part of Russia were summarized. In particular, the process of formation ofdissolved organic matter (DOM) after death of phytoplankton cells was studied in experiments with natural watersamples. After the death of phytoplankton cells the destruction of dead cells and release of some part of the cellcontents into the aquatic environment as dissolved organic matter occurred within one week. In the first three daysbacteria consumed ~50% of the DOM thus released, and subsequently up to 30‒35%. Experiments with planktonof natural water samples collected from June through September showed that ~70% of the organic matter secretedby living phytoplankton cells and ~40% of that released into the water after the death of phytoplankton cells wasconsumed by bacterioplankton. Also studied were quite a number of other aspects of interactions between DOM,phytoplankton, bacteria, and detritus. For the first time, detailed quantitative data on the detrital particles in theaquatic freshwater ecosystems and some data on the formation and oxidative biodegradation of DOM by plankton,as well as many other quantitative data were obtained.Keywords: bacterioplankton, detritus, dissolved organic matter (DOM), cyanobacteria, algae, heterotrophic activity,destruction processes, mineralization of organic matterDOI: 10.1134/S1070363220130277