Hydrobiologia

, Volume 723, Issue 1, pp 195–204

Effects of mute swans on wetlands: a synthesis

Authors

    • Service du Patrimoine NaturelMuséum National d’Histoire Naturelle
  • Guillemain Matthieu
    • Office National de la Chasse et de la Faune SauvageCNERA Avifaune Migratrice
  • Defos du Rau Pierre
    • Office National de la Chasse et de la Faune SauvageCNERA Avifaune Migratrice
  • Grillas Patrick
THE ROLE OF PONDS

DOI: 10.1007/s10750-013-1704-5

Cite this article as:
Guillaume, G., Matthieu, G., Pierre, D.R. et al. Hydrobiologia (2014) 723: 195. doi:10.1007/s10750-013-1704-5

Abstract

The increases in mute swan (Cygnus olor Gmelin) population size have caused concern among stakeholders, who sometimes consider it as a pest species. Here, we aim to review existing studies on the ecological effects that mute swans have on wetlands. Claim that mute swans threaten other waterbirds were partly supported: mute swans sometimes behave territorially towards conspecifics and other waterbird species, but this does not systematically occur. A second common claim, that mute swans damage aquatic plant beds, was upheld in that the species did indeed affect aquatic plant communities in several studies. However, grazing by mute swans does not systematically have negative effects on aquatic plants. Habitat patch size, distance between habitat patches, resource availability and water velocity affect habitat selection process by mute swans, with varying effects depending on season and mute swan breeding status. Scientific knowledge does not support the idea that mute swan population increase can be considered as a biological invasion in Europe. Conversely, there is a genuine risk of biological invasion in North America. In light of the literature review, we discuss the relevance of mute swan population management in Europe and in North America, and propose future research avenues.

Keywords

Mute swan (Cygnus olor Gmelin)Population increaseCommunityHerbivoryHabitat selection

Copyright information

© Springer Science+Business Media Dordrecht 2013