Open AccessDissolved organic matter and lake metabolism: Biogeochemistry and controls of nutrient flux dynamics to fresh waters. Technical progress report, January 1, 1990--December 31, 1991
Author(s) -
Robert G. Wetzel
Publication year - 1992
Language(s) - English
Resource type - Reports
DOI - 10.2172/296880
Subject(s) - dissolved organic carbon , nutrient , wetland , littoral zone , biota , environmental science , macrophyte , biogeochemistry , nutrient cycle , organic matter , biogeochemical cycle , ecology , environmental chemistry , flux (metallurgy) , hydrology (agriculture) , chemistry , biology , geology , geotechnical engineering , organic chemistry
The land-water interface region consists of two major components: the wetland, and the down-gradient adjacent littoral floating-leaved and submersed, macrophyte communities. Because of the importance of very high production and nutrient turnover of attached microbiota, a major emphasis of this investigation was placed upon these biota and their metabolic capacities for assimilation and release of organic compounds and nutrient retention and cycling. Examination of the capacities of wetland littoral communities to regulate fluxes of nutrients and organic compounds often has been limited to input-output analyses. These input-output data are an integral part of these investigations, but most of the research effort concentrated on the biotic and metabolic mechanisms that control fluxes and retention capacities and their effects upon biota in the down-gradient waters. The important regulatory capacities of dissolved organic compounds on enzyme reactivity was examined experimentally and coupled to the wetland-littoral organic carbon flux budgets