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Perception and Processes
An Exceptionally Powerful Biotic Factor
The Human Factor
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abundance actions agricultural animals approach areas become behavior biodiversity Biosphere causes century Chapter City clear communities complex components concept concern continue critical cultivated cultural decline deposition described diversity dominant dynamics early ecological ecologists economic ecosystems effects environment environmental et al evidence example factors fields Figure fire fish forest function global gradient growth habitat human human activities impacts important increase indicate influences interactions issue Lake land landscape less levels limitations major maps mean measured methods Michigan models natural nitrate observed occurred organic Park past patterns period plants population predicted present problems processes production questions rates region relationship response result rivers role scale scientists social society soil species structure subtle Table tion understanding University urban values variables vegetation volume