21.September 2025

Teadlased loodavad tehissaare abil Põrmujärve elurikkuse taastada

Scientists hope to restore biodiversity in Lake Põrmujärv with artificial island

Võrumaal Navi külas on Põrmujärv . Iga aasta kasvavad seal ja . Kohalikud inimesed ei ole rahul sellega. Teadlased on nüüd pannud järvele tehissaare. Nad loodavad, et see aitab järve . Lisaks peaks taastuma.

Eesti Maaülikooli teadlased töötavad koos Rootsi ja Läti teadlastega. Nad proovivad leida lahendusi . Nii panid nad Põrmujärvele ja kahele Läti järvele . Saartel kasvab hoolikalt valitud .

Järves on väga palju sinivetikaid. Need on ka ohtlikud, sest nad toodavad toksiine. Emeriitprofessor Ingmar Ott ütles, et tehissaarel võiks kasvada liigid, mis kasvavad kiiresti kohalikus keskkonnas. Ta nimetas kolme taime: hundinui, pilliroog ja parthein. Need taimed peaksid imama toitesoolasi ja looma .

Varem prooviti Põrmujärve olukorda parandada. Eemaldati järvemuda ja suurendati järve veepinda. Kuid olukord läks hullemaks. Nüüd loodavad teadlased, et uus meetod aitab järve vett puhastada. Tehisaare paigutamine on esimene katse.

Kohalik elanik Alar Meltsov rääkis, et uuringud näitasid, et järvevesi on ohtlik. Ta ütles: "Ärge kastke selle veega tomatte, kurke ega salateid. Mikrotsütiinid, mis on vees, jäävad taimedesse ja on ohtlikud." Samuti ütles ta: "Lootus sureb viimasena. Me loodame, et meie ilus järv tuleb tagasi. Me tahame ujuda, kala püüda ja nautida järve kallast."

Lake Põrmujärv in Navi village, Võrumaa, is in poor condition. Every year, blue-green algae grow there and the water smells. Local people are not happy about this. Scientists have now placed an artificial island in the lake. They hope it will help make the lake healthier. Additionally, biodiversity in the lake should be restored.

Scientists from the Estonian University of Life Sciences are working together with researchers from Sweden and Latvia. They are trying to find solutions to improve the poor condition of the lake. They have placed floating islands in Lake Põrmujärv and two Latvian lakes. The islands have carefully selected aquatic vegetation.

The lake has a lot of blue-green algae. These are also dangerous because they produce toxins. Emeritus Professor Ingmar Ott said that the artificial island could grow species that thrive quickly in the local environment. He named three plants: water soldier, common reed, and water mint. These plants should absorb nutrients and create a living environment in the lake.

Previously, attempts were made to improve the condition of Lake Põrmujärv. Lake sediment was removed, and the water surface was expanded. However, the situation worsened. Now, scientists hope that the new method will help purify the lake water. Placing the artificial island is the first attempt.

Local resident Alar Meltsov said that studies showed the lake water is dangerous. He said: "Do not water tomatoes, cucumbers, or salads with this water. Microcystins in the water remain in the plants and are dangerous." He also said: "Hope dies last. We hope our beautiful lake will return. We want to swim, fish, and enjoy the lakeshore."