A5028796794- Fire effects on ecosystems
- Hydrology and Watershed Management Studies
- Cryospheric studies and observations
- Ecology and Vegetation Dynamics Studies
- Rangeland and Wildlife Management
- Wildlife Ecology and Conservation
- Plant Water Relations and Carbon Dynamics
- Rangeland Management and Livestock Ecology
- Animal Diversity and Health Studies
- Agroforestry and silvopastoral systems
- Forest ecology and management
- Tree-ring climate responses
- African Botany and Ecology Studies
- Flood Risk Assessment and Management
- Soil erosion and sediment transport
- Groundwater and Watershed Analysis
- Bioenergy crop production and management
- Seedling growth and survival studies
- Ruminant Nutrition and Digestive Physiology
- Hydrology and Drought Analysis
- Transboundary Water Resource Management
- Automated Road and Building Extraction
- Archaeology and Natural History
- Botany and Plant Ecology Studies
- Ecology and biodiversity studies
Utah State University
2008-2022
Mpala Research Center and Wildlife Foundation
2019-2021
US Forest Service
2010
Brigham Young University
2010
Abstract In aspen and other plant species the effects of environment on phenotype are generally better characterized than genotypic influences. Furthermore, little is known about how genetic influences tree change over time. We assessed clonal differences in 417 ramets, representing 18 clones, a common garden quaking (Populus tremuloides Michx.) that have developed 27 years. Genetic contributions to variation physiology, growth, vigor were determined seasonal multidecadal time scales. The...
Abstract Grassland and savanna ecosystems, important for both livelihoods biodiversity conservation, are strongly affected by ecosystem drivers such as herbivory, fire, drought. Interactions among herbivores vegetation produce complex feedbacks in these but have rarely been studied the context of fuel continuity resultant fire heterogeneity. We carried out 36 controlled burns within replicated experimental plots that had allowed differential access wild domestic large since 1995 a Kenya....
Management of tree cover, either to curb bush encroachment or mitigate losses woody cover over-browsing, is a major concern in savanna ecosystems. Once established, trees are often "trapped" as saplings, since interactions among disturbance, plant competition, and precipitation delay sapling recruitment into adult size classes. Saplings can be directly suppressed by wildlife browsing competition from adjacent plants, indirectly facilitated grazers, such cattle, which feed on neighboring...
Abstract Fire, herbivores, and climatic factors are all major drivers of savanna grassland dynamics, they interact in complex ways, which still the process being explored. In particular, herbivores can reduce fire intensity by removal biomass, this could be reinforced herbivores’ attraction to recently burned sites, although resilience may limit temporal depth such effects. Fire temperature is most common metric reported for fire, but additional aspects behavior also measured. Using a set...
Abstract Savanna tree cover is dynamic due to disturbances such as fire and herbivory. Frequent fires can limit a key demographic transition from sapling adult height classes in savanna trees. Saplings may be caught ‘fire trap’, wherein individuals repeatedly resprout following top‐kill events. only rarely escape the cycle by attaining fire‐resistant (e.g. taller than minimum scorch height) during fire‐free intervals. Large mammalian herbivores also trap trees shorter size classes. Browsing...