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#nutria #coypu #invasive species #introduced species #non-native rodent #pest animal #ecological impact

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#aral sea #fishery collapse #ecological impact #agricultural impact #environmental damage #dead zone

🌊🚧🐟

#weir #fish passage #river obstruction #fish ladder #ecological impact

🏜️🥀💀

#desertification #dead plants #withered #dry soil #barren land #ecological impact #parched earth

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#fish migration barrier #weir #river obstacle #fish pass context #ecological impact