Turnover of freshwater-plant taxa: the example of an ornamental lake in East Yorkshire

摘要

Aquatic and wetland plants were recorded at Thwaite Lake, Cottingham, in 2008 to 2010 and comparison with pre-1988 records suggested that many species had apparently been gained and many lost (17 gains, 29 losses); introduced taxa were especially liable to be lost. Possible reasons for gains and losses included site management, year-to-year variation in climate, nutrient enrichment, natural colonization, anthropogenic introductions, and intermittent pollution. The study supports the suggestion that plant communities at artificial freshwater sites are unlikely to be static; they are subject to change driven by both natural events and human influence.