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Submersed macrophytes as a food source for wintering waterbirds at Lake Constance

Submersed macrophytes as a food source for wintering waterbirds at Lake Constance

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SCHMIEDER, Klaus, Stefan WERNER, Hans-Günther BAUER, 2006. Submersed macrophytes as a food source for wintering waterbirds at Lake Constance. In: Aquatic Botany. Elsevier. 84(3), pp. 245-250. ISSN 0304-3770. eISSN 0304-3770. Available under: doi: 10.1016/j.aquabot.2005.09.006

@article{Schmieder2006-04Subme-50149, title={Submersed macrophytes as a food source for wintering waterbirds at Lake Constance}, year={2006}, doi={10.1016/j.aquabot.2005.09.006}, number={3}, volume={84}, issn={0304-3770}, journal={Aquatic Botany}, pages={245--250}, author={Schmieder, Klaus and Werner, Stefan and Bauer, Hans-Günther} }

Submersed macrophytes as a food source for wintering waterbirds at Lake Constance 2006-04 Werner, Stefan 2020-07-07T08:32:47Z eng Bauer, Hans-Günther terms-of-use Schmieder, Klaus 2020-07-07T08:32:47Z Bauer, Hans-Günther We investigated the relationship between Charophytes and herbivorous waterbirds in the littoral zone of Lake Constance by quantifying their seasonal dynamics. The waterfowl extensively consumed Charophyte vegetation in shallower areas (<1 m water depth) at the beginning of the winter season, while deeper regions were only used in late winter. By the end of winter, the waterfowl had almost completely depleted the available Charophyte biomass down to a water depth of approximately 2 m (relative to average mean water level (AML)). Enclosure experiments revealed that senescence processes had a negligible influence on Charophytes biomass loss until early February. Coot, Red-crested Pochard and Pochard are the main avian Chara consumers in winter. Despite their great influence on biomass in winter, their influence on subsequent Charophyte regeneration is probably limited in Lake Constance, since Charophytes as typical pioneer species produce innumerable diaspores forming dense Charophyte meadows at a depth of between 1 and 4 m every year. Schmieder, Klaus Werner, Stefan

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