Ecosystem services of Lake Võrtsjärv under multiple stress: a case study

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Abstract

This study is the first attempt at the European scale to make an inventory of ecosystem services (ESS) of a large lake. We analysed a set of ESS indicators against the annual mean values of environmental parameters for 2006–2013. According to principal component analysis, the trophic state- and hydrology-related factors explained about 70% of the environmental variability of the lake and showed strong relationships with some ESS. Among the provisioning ESS, the annual eel catch and the total fish catch were positively related to different eutrophication indicators while the catches of pike, bream, and burbot depended rather on hydrological factors. Reed harvesting efficiency was related to the lake’s water level. The indicators of regulating, maintenance, and cultural ESS showed very high variability in different years, the latter depending on socio-economic conditions rather than environmental factors. We discovered numerous trade-offs between ESS benefitting from higher trophic state or regulated water level of the lake and the goals of good ecological status of the lake. Our analysis showed a clear need for rules prioritizing life supporting regulatory services against other ESS.

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Vilbaste, S., Järvalt, A., Kalpus, K., Nõges, T., Pall, P., Piirsoo, K., … Nõges, P. (2016). Ecosystem services of Lake Võrtsjärv under multiple stress: a case study. Hydrobiologia, 780(1), 145–159. https://doi.org/10.1007/s10750-016-2871-y

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