Encroaching urbanisation changed Iidesjärvi from being a lake largely in a rural area surrounded by cultivated fields, pastures and meadows at the beginning of the 20th century to its present-day urban land setting. The lake has been damaged by pollution, road construction, dumping of toxic waste, introduced species and building of new settlements. To assess the impact of these temporal changes in the aquatic plant biodiversity of Iidesjärvi this study analysed macrophyte survey data collected during the course of the 20th century. The study indicated that despite of the environmental changes the total number of aquatic macrophytes remained relatively stable, but the species composition has changed considerably reflecting the changes in land use, water quality and the invasion of alien species. Some previously dominant species have disappeared with eutrophication affecting particularly elodeids and ceratophyllids. Some species have returned to the lake after a long absence. Similar lakes in the region form a dynamic system where the exchange of species from one to another may be possible. The semi-isolated lagoons may also help to re-establish aquatic macrophyte species in the main basin of Iidesjärvi, if the water quality improves in the future.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.
Vol. 45 • No. 5