Marile Lacuri, invadate de specii necunoscute
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Speciile care invadează Marile Lacuri provoacă pagube de 200 milioane dolari anual, susţin specialiştii de la Centrul pentru Conservare Acvatică din statul Indiana. Studiul, dat de curând
Speciile care invadează Marile Lacuri provoacă pagube de 200 milioane dolari anual, susţin specialiştii de la Centrul pentru Conservare Acvatică din statul Indiana. Studiul, dat de curând publicităţii, arată că, în decursul a 50 de ani, Marile Lacuri au fost invadate de 57 de specii care produc pagube imense în aceste locuri, mai ales pescuitului sportiv şi comercial, dar şi tratării apelor şi rezervelor de apă.
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