Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"woody encroachment"”.
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Practices combining fire and grazing in the Central U.S. reduce woody encroachment and accommodate grassland and shrubland birds
… one may be at the expense of the other. Woody encroachment is one of the greatest contemporary threats to grasslands, but reversing encroachment necessarily reduces shrublands. A parallel conundrum arises with avian biodiversity, as both grassland and shrubland birds are in steep decline. …
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Eastern Redcedar Encroachment In Southern Great Plains Grasslands: Wildlife Consequences And Management Implications
… the past two centuries has facilitated extensive woody encroachment by eastern redcedar (Juniperus virginiana, hereafter redcedar). Conversion of grassland to redcedar woodland occurs rapidly as a result of the interaction between changing disturbance and land use patterns. In addition, redcedar …
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Breeding Bird Response to Post Oak Savanna Restoration Seven Years Post Management In Eastern Texas
… have been reduced or eliminated, resulting in woody encroachment and subsequent habitat loss and degradation. In 2009-10, a baseline, pre-restoration study was completed to determine vegetation characteristics, breeding bird abundances, nest success, and nest site selection at the Gus Engeling …
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Demographic and environmental determinants of reproductive success in Synthyris bullii, a rare endemic species
… pollinator visitation at sites that vary in woody encroachment. The results show that reproduction is positively associated with more open habitats, and that pollen quality may partly explain the reproductive success in these populations. Taken together, the results of these studies show that …
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Demography and leaf physiology of Cornus drummondii in response to disturbance in tallgrass prairie
The expansion of woody species into grasslands has altered community structure and ecosystem function of grasslands worldwide. Woody encroachment has led to a loss of floristic biodiversity and changes in ecosystem carbon, nitrogen, and water relations. In tallgrass prairie, the increased cover and …
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Spring Dispersal and Breeding Ecology of Northern Bobwhite in Southwest Ohio
… annual mortality. Providing early successional woody cover within landscapes could improve annual survival and reverse bobwhite population declines in the Midwest. Early successional woody habitat was highly selected at multiple spatial scales during the breeding season. Bobwhites with higher …
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Vegetation structure and inferred patterns of functional group attrition in a shrub encroached old field and tallgrass prairie mosaic
Tallgrass prairie is an endangered ecosystem and encroachment by woody species threatens many remnants. Insights are needed into the differences in diversity and species and functional group composition along a gradient of woody encroachment to help gauge restoration potential and gain insights …
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Relationships of piñon juniper woodland expansion and climate trends in the Walker Basin, Nevada
… region of the western United States, woodyencroachment of piñon juniper (Pinus monophylla & Juniperus osteosperma) woodlandsis well known, but the drivers of its expansion are not well understood across elevationalgradients. Predominant theories of future vegetation distribution change …
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Savanna dynamics under extreme conditions
… biome best described by a mix of herbaceous and woody plants. The former create a more or less continuous layer while the latter should be sparse enough to leave an open canopy. What has long intrigued ecologists is how these two competing plant life forms of vegetation coexist. Initially …