Trophic cascades among wolves, elk and aspen on Yellowstone National Park’s northern range
作者： William J Ripple , Eric J Larsen , Roy A Renkin , Douglas W Smith
DOI: 10.1016/S0006-3207(01)00107-0
关键词:
摘要: … We made measurements on all aspen suckers and trees within the plots. Aspen suckers … Based on field measurements, a stand was defined as a group of aspen trees each within 30 m …
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