Macrophyte species composition refl ecting water quality changes in adjacent water bodies of lake Hiidenvesi, SW Finland
نویسنده
چکیده
The manifold role of aquatic macrophytes in lake ecology is closely linked to their distribution and biomass, which in turn is a synergy of various environmental factors. The implication of different environmental variables on macrophyte speciation and life form structure in lake Hiidenvesi, with an uneven eutrophication history, was studied. The persisting life forms refl ected the somewhat inherently turbid water: emergent and fl oating-leaved species were common, whereas submerged species were scarce and low-light tolerant dominated. Effects of uneven nutrient loading were noticeable amongst the interconnected basins of the lake: the shallow, northernmost basins are most turbid and eutrophic, and the steeper westerly basins are in turn less eutrophicated and more clear-water. Increased nutrient level and turbidity together with softening of bottom substrate have emphasized the speciation to more eutraphent species and pleustophytes, especially in the most eutrophic Kirkkojärvi basin.
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