ナショナルジオグラフィックのインスタグラム(natgeo) - 7月25日 22時00分

Photo by @drewtrush // "Wolves are the truest measure of ecosystem health. Their presence indicates a diversity of mammals from voles to beavers to moose, which all depend on and are regulated by a diversity of plants. The influence of wolves at the top of the food chain can change the course of rivers.” @alaskanps Biologist Mat Sorum with Yukon-Charley Rivers National Preserve on why it’s important to study predators and ecosystems in Alaska.
#publiclands

[BIHAKUEN]UVシールド(UVShield)

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