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 20 of 29 for “"nonnative species"”.
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RESTORATION OF NATIVE PLANT COMMUNITIES AFTER ROAD DECOMMISSIONING: EFFECT OF SEED MIX AND SOIL PROPERTIES ON VEGETATIVE ESTABLISHMENT
… 2) effects of seed-mix seed origin (native vs. nonnative), species diversity, and seeding density on vegetative establishment, and 3) impact of overstory canopy and coarse woody debris on revegetation success on recently decommissioned roads. Total vegetative cover declined by 60% one-year after …
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RESTORATION OF NATIVE PLANT COMMUNITIES AFTER ROAD DECOMMISSIONING: EFFECT OF SEED MIX AND SOIL PROPERTIES ON VEGETATIVE ESTABLISHMENT
… 2) effects of seed-mix seed origin (native vs. nonnative), species diversity, and seeding density on vegetative establishment, and 3) impact of overstory canopy and coarse woody debris on revegetation success on recently decommissioned roads. Total vegetative cover declined by 60% one-year after …
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Differential Canopy Leaf Flushing and Site Nitrogen Status Facilitate Invasive Species Establishment in Temperate Deciduous Forest Understories
<p>Invasion by nonnative species is considered one of the greatest threats to ecosystem structure and function worldwide. In the temperate forests of the northeastern United States invasive plant species frequently establish and colonize edge environments; however, they are not confined to these …
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Role of seed mixes, biochar soil amendment, and the soil seed bank in improving Palouse Prairie restoration
… but could provide insight into methods or species to use for restoration. My research aimed to determine the effects of seed mix diversity, annual seed addition, and soil organic matter (as biochar) addition on prairie restoration success accounting for the rolling topography of the …
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Spatiotemporal response of aquatic native and nonnative taxa to wildfire disturbance in a desert stream network
… are imperiled as a result of habitat alteration, species introductions and climate-moderated changes in disturbance regimes. Native conservation and nonnative species management could benefit from greater understanding of critical factors promoting or inhibiting native and nonnative success in the …
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Fish invasions in the Mid-Atlantic region of the United States
Nonnative fishes are a major threat to biodiversity and new species continue to be introduced. In this dissertation, I described patterns and assessed determinants of fish invasions in the Mid-Atlantic region of the United States. Data on nonnative fish distributions were obtained from the United …
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STAKEHOLDER CHALLENGES AND OPPORTUNITIES: APPLYING A SOCIO- ECOLOGICAL FRAMEWORK TO INTEGRATE HUMAN DIMENSIONS WITH U.S. WILDLIFE MANAGEMENT
… a socio- ecological approach for native versus nonnative species. Interviews revealed inherent issues with the NAMWC, and challenges and opportunities for the integration of human dimensions. By understanding existing challenges and opportunities, agencies can begin to develop holistic solutions …
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Lemur catta in the Region of Cap Sainte-Marie, Madagascar: Introduced cacti, xerophytic Didiereaceae-Euphorbia bush, and tombs
… bush habitat that represents over 90% of this species' potential range. Moreover, this study is the first to document ring-tailed lemurs, or any primate species for that matter, as cactus dwellers. Data were collected for 15 consecutive months on two different troops in the Cap Sainte-Marie: …
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Seasonal and lunar patterns of peach blossom jellyfish (Craspedacusta sowerbii) in Michigan
… status, understanding the ecology of this species is a priority. To characterize population dynamics during the medusa season, surface water temperature and medusa abundance were surveyed at six inland lakes in Michigan. Occurrence records of C. sowerbii in Michigan were then used to …
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Invasion Genetics of the Blue Catfish (Ictalurus Furcatus) Range Expansion into Large River Ecosystems of the Chesapeake Bay Watershed
… is ranked among the most invasive, nonnative species of concern in the Chesapeake Bay watershed. This species, intentionally introduced to three major tributaries and a number of impoundments between 1974 and 1989 for sport fishing, has spread into three additional tributaries. Using …
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Diversity, Invasibility, and Stability of Appalachian Forests across an Experimental Disturbance Gradient
… of biological diversity and invasions by nonnative species; and (2) providing empirical data that will help guide the sustainable use of forest resources. This work is part of the Southern Appalachian Silviculture and Biodiversity (SASAB) experiment that was established in the early 1990s …
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Predator Recognition and Avoidance in the San Marcos Salamander
… predation by a diverse community of native and nonnative fish predators. Despite the importance of predation pressures on prey populations and the protected status of E. nana and other regional congeners, no studies had examined predator-prey interactions in these species. This research was …
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TROPHIC DYNAMICS OF THE LAKE SUPERIOR FISH COMMUNITY
… namaycush</em>) and the introduction of several nonnative species. The trophic linkages and ecological requirements of the entire fish community, including predators and prey fishes, has not been assessed on a whole-lake scale in over a decade. Here, I investigated the trophic dynamics across …
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Between a bass and a hard place: the fragmented distribution of an endangered redfin in the Heuningnes River System of the Cape Fold Ecoregion
… climate change, and introduction of nonnative species. The Cape Fold Ecoregion (CFE) of South Africa is recognised as a hotspot for freshwater fish endemism. It is also recognised as one of six hotspots for freshwater fish invasions. Hence, 36% of native and 66% of endemic freshwater …
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Ecology of Glacial Relict Fishes in South Dakota's Sandhills Region
… stream fragmentation and introductions of nonnative species have led to numerous extinctions, extirpations and altered distributions. Insufficient information regarding imperiled species often results in reactive, rather than proactive, management, and knowledge of species status and …
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Life History and Demography of Trillium ovatum Pursh. (Liliaceae)in Western Montana
… of the same threats as other forest understory species—logging, overharvest for horticultural/medicinal use, competition from nonnative species, and overgrazing. Low fecundity and recruitment may limit the ability of these populations to recover from stress or mortality events, and make them …
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Effects of Barriers on Migratory Bull Trout and Application of a Conceptual Framework to Evaluate Tradeoffs Associated with Dam Removal in the Clearwater River Drainage, Montana
… but can also be beneficial by preventing exotic species expansion. Therefore, evaluation of these tradeoffs is critical before making decisions that may affect the long term viability of populations. The disruption of movement corridors due to damming and interactions with nonnative species are …
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Life History and Demography of Trillium ovatum Pursh. (Liliaceae)in Western Montana
… of the same threats as other forest understory species—logging, overharvest for horticultural/medicinal use, competition from nonnative species, and overgrazing. Low fecundity and recruitment may limit the ability of these populations to recover from stress or mortality events, and make them …
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Effects of Barriers on Migratory Bull Trout and Application of a Conceptual Framework to Evaluate Tradeoffs Associated with Dam Removal in the Clearwater River Drainage, Montana
… but can also be beneficial by preventing exotic species expansion. Therefore, evaluation of these tradeoffs is critical before making decisions that may affect the long term viability of populations. The disruption of movement corridors due to damming and interactions with nonnative species are …
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Bioassessment and the Partitioning of Community Composition and Diversity Across Spatial Scales in Wetlands of the Bonneville Basin
… wetlands in the United States. Several aquatic species and communities have maintained an existence as relict populations and communities in these wetlands since the receding of Lake Bonneville over 10,000 years ago. For example, Hershler has described 58 previously undescribed species of …
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