Institution: | 1. Department of Biology, University of Pennsylvania, Philadelphia, PA, 19104-6018, USA 2. Department of Earth and Environmental Science, University of Pennsylvania, Philadelphia, PA, 19104-6316, USA 3. Department of Botany, University of Wyoming, Laramie, WY, 82071, USA 4. Department of Ecology, National University of Mongolia, Ulaanbaatar, 210646, Mongolia
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