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作者单位: | College of Nature Conservation, Beijing Forestry University, Beijing, China;College of Nature Conservation, Beijing Forestry University, Beijing, China;College of Nature Conservation, Beijing Forestry University, Beijing, China;College of Nature Conservation, Beijing Forestry University, Beijing, China;School of Natural resources, West Virginia University, Morgantown, West Virginia, United States of America;College of Nature Conservation, Beijing Forestry University, Beijing, China
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