Kliimamuutuse mõju eesti järvede looduse hüvedele
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Kuupäev
2026
Kättesaadavus
08.09.2026
Autorid
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Eesti Maaülikool
Abstrakt
Kliimamuutused mõjutavad Eesti järvede ökosüsteeme, mis on olulised nii bioloogilise mitmekesisuse kui ka kohalike kogukondade heaolu seisukohalt. Järved pakuvad mitmesuguseid looduse hüvesid, sealhulgas elupaiku, vee kvaliteedi säilitamist, kalavarusid ning puhke ja virgestusvõimalusi. Varasemad uuringud on näidanud, et ka suhteliselt väikesed kliimamuutused võivad mõjutada järvede füüsikalisi, keemilisi ja bioloogilisi protsesse, põhjustades näiteks eutrofeerumist, hapnikupuudust ja elurikkuse vähenemist.
Bakalaureusetöö eesmärk oli analüüsida kliimamuutuste mõju Eesti järvede ökosüsteemidele ja nende pakutavatele looduse hüvedele. Töö põhines teadusartiklitel ja eksperthinnangutel ning selles käsitleti peamiste kliimategurite, nagu temperatuur, sademed ja tuul, mõju järvede veetemperatuurile, jäärežiimile, hapnikutingimustele, toitelisusele ja elustikule.
Töö tulemusena selgus, et veetemperatuuri tõus, sademete muutumine ja jääkatte kestuse lühenemine võivad halvendada järvede ökoloogilist seisundit. Need muutused soodustavad eutrofeerumist, vee kvaliteedi langust, vetikate vohamist ning külmalembeste liikide vähenemist. Selle tulemusena võivad nõrgeneda järvede pakutavad looduse hüved, sealhulgas kalavarud, vee puhastumisvõime ja rekreatiivsed võimalused. Negatiivsete mõjude leevendamiseks on oluline rakendada kohanemismeetmeid, vähendada toitainete sissekannet ning tugevdada järvede seisundi seiret.
Climate change affects the ecosystems of Estonian lakes, which are important for both biodiversity and the well being of local communities. Lakes provide various ecosystem services, including habitats, maintenance of water quality, fish resources, and recreational opportunities. Previous studies have shown that even relatively small changes in climate can influence the physical, chemical, and biological processes of lakes, causing eutrophication, oxygen depletion, and a decline in biodiversity. The aim of this bachelor’s thesis was to analyse the impact of climate change on the ecosystems of Estonian lakes and on the ecosystem services they provide. The thesis was based on scientific articles and expert assessments, and it examined the effects of key climate factors, such as temperature, precipitation, and wind, on lake water temperature, ice regime, oxygen conditions, trophic status, and biota. The results showed that rising water temperature, changes in precipitation, and a shorter duration of ice cover may worsen the ecological status of lakes. These changes promote eutrophication, deterioration of water quality, algal blooms, and the decline of cold-water species. As a result, the ecosystem services provided by lakes may weaken, including fish resources, the natural water purification capacity, and recreational opportunities. To mitigate the negative impacts, it is important to implement adaptation measures, reduce nutrient input, and strengthen the monitoring of lake conditions.
Climate change affects the ecosystems of Estonian lakes, which are important for both biodiversity and the well being of local communities. Lakes provide various ecosystem services, including habitats, maintenance of water quality, fish resources, and recreational opportunities. Previous studies have shown that even relatively small changes in climate can influence the physical, chemical, and biological processes of lakes, causing eutrophication, oxygen depletion, and a decline in biodiversity. The aim of this bachelor’s thesis was to analyse the impact of climate change on the ecosystems of Estonian lakes and on the ecosystem services they provide. The thesis was based on scientific articles and expert assessments, and it examined the effects of key climate factors, such as temperature, precipitation, and wind, on lake water temperature, ice regime, oxygen conditions, trophic status, and biota. The results showed that rising water temperature, changes in precipitation, and a shorter duration of ice cover may worsen the ecological status of lakes. These changes promote eutrophication, deterioration of water quality, algal blooms, and the decline of cold-water species. As a result, the ecosystem services provided by lakes may weaken, including fish resources, the natural water purification capacity, and recreational opportunities. To mitigate the negative impacts, it is important to implement adaptation measures, reduce nutrient input, and strengthen the monitoring of lake conditions.
Kirjeldus
Bakalaureusetöö
Kalanduse ja rakendusökoloogia õppekaval
Märksõnad
bakalaureusetööd, kliimamuutus, järved, hüved, ökosüsteemiteenused