نتایج جستجو برای: mature trees
تعداد نتایج: 156488 فیلتر نتایج به سال:
Knowledge of latitudinal patterns in plant defense and herbivory is crucial for understanding the mechanisms that govern ecosystem functioning and for predicting their responses to climate change. Using a widely distributed species in East Asia, Quercus variabilis, we aim to reveal defense patterns of trees with respect to ontogeny along latitudinal gradients. Six leaf chemical (total phenolics...
We found that the most suitable flooding disturbance model for regenerating Populus euphratica forest was two to three times per year with a duration of 15-20 days and an intensity of 25-30 m(3)/s. The flooding should take place during the seed emergence to young tree growth stages, and should be based on flooding experiments and data from vegetation quadrats and ecological water conveyance. Fu...
Less than 10% of Minnesota’s hardwood forests remain after heavy logging in the 19 and early 20 centuries. In order to ensure that this ecosystem continues to be a part of Minnesota’s natural history, forest managers have begun practicing active and passive restoration. The composition of a remnant forest, planted forest, and an adjacent old-field in the St. Olaf College Natural Lands, was anal...
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