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Type
Topic
Region
Year
Displaying 41 - 46 of 46
Biggs, Florkowski, Pearthree, Shaner
Throughout the southwestern United States, vegetation in what historically was grassland has changed to a mixture of trees and shrubs; exotic grass species and undesirable shrubs have also invaded the grasslands at the expense of native grasses. The…
Year: 2005
Type: Document
Martin, Asner
Woody encroachment, a spatially explicit process of land-cover change, is known to affect the biophysicaland biogeochemical properties of ecosystems. However, little information is available on the impacts of woody encroachment on N oxide emissions…
Year: 2005
Type: Document
Variation in nitrogen deposition and available soil nitrogen in a forest-grassland ecotone in Canada
Kochy, WilsonRegional variation in nitrogen (N) deposition increases plant productivity and decreases species diversity, but landscape- or local -scale influences on N deposition are less well-known. Using ion-exchange resin, we measured variation of N…
Year: 2005
Type: Document
Bock, Block
Fire is an important ecological force in many southwestern ecosystems, but frequencies, sizes, and intensities of fire have been altered historically by grazing, logging, exotic vegetation, and suppression. Prescribed burning should be applied…
Year: 2005
Type: Document
Habeck
[no description entered]
Year: 1972
Type: Document
Richardson
From the conclusions ... 'The results of this experiment have shown that Sitka spruce can be satisfactorily established on fresh to moist burned cutovers with shallow organic mantels, in Forest Section B28a by broadcast seeding without ground…
Year: 1972
Type: Document