Search results for "Juniperus occidentalis"

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An Ecohydrological Cellular Automata Model Investigation of Juniper Tree Encroachment in a Western North American Landscape

2016

Woody plant encroachment over the past 140 years has substantially changed grasslands in western North American. We studied encroachment of western juniper (Juniperus occidentalis var. occidentalis) into a previously mixed shrub–grassland site in central Oregon (USA) using a modified version of Cellular Automata Tree–Grass–Shrub Simulator (CATGraSS) ecohydrological model. We developed simple algorithms to simulate three encroachment factors (grazing, fire frequency reduction, and seed dispersal by herbivores) in CATGraSS. Local ecohydrological dynamics represented by the model were first evaluated using satellite-derived leaf area index and measured evapotranspiration data. Reconstruc…

010504 meteorology & atmospheric sciences0208 environmental biotechnologyved/biology.organism_classification_rank.specieswoody plant02 engineering and technologyLand cover01 natural sciencesShrubecohydrologyShrublandEnvironmental ChemistrygrazingEcology Evolution Behavior and Systematics0105 earth and related environmental sciencesHydrologygeographygeography.geographical_feature_categoryEcologybiologyved/biologyEcologySettore ICAR/02 - Costruzioni Idrauliche E Marittime E IdrologiaVegetationPlant functional typebiology.organism_classificationEcology Evolution Behavior and Systematicseed dispersal020801 environmental engineeringJuniperus occidentalisEnvironmental sciencePlant coverJunipergrasslandshrublandfireEcosystems
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