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The top documents tagged [pine beetle attack]
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pine beetle attack
Climate Change and Air Quality in US National Parks: a new project sponsored by NPS Colette L. Heald & Maria Val Martin Colorado State University NPS Report.
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Biotic Factor Bio means life. Biology – study of life Biosphere – life ball So, a BIOTIC FACTOR is a living part of an ecosystem!
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Abiotic and Biotic Factors
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