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Primary production in a shallow water lake with special reference to a reed swamp

Oikos 27(2): 243-250
Primary production in a shallow water lake with special reference to a reed swamp
Phytoplankton gross primary production (14C method) in the shallow, eutrophic Danish Lake Arreso in 1973 was 980 g C m-2. Calculated net primary production was near 0. Macrophyte net primary production was measured by harvesting the maximum biomass, and above ground values were between 420-1325 g ash free dry weight m-2, while below ground values were between 2480-8570 g ash free dry weight m-2. The reed swamps were mapped on aerial photographs, and the composition of the macrophyte vegetation was determined. A comparison of macrophyte vegetation in 1944 and 1972 showed a reduction in species diversity, especially of submerged species. The seasonal variations in physical and chemical data indicated strong eutrophication in Arreso.

Accession: 006184171

DOI: 10.2307/3543902

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