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.
Results
Showing 1 to 20 of 30 for “"habitat factors"”.
-
The relationships between forest and mountain fynbos communities in the southwestern Cape Province of South Africa
… forest and fynbos communities are separated by habitat factors or whether they are different successional stages of the same vegetation type. The effects of fire on forests, regeneration processes and habitat factors were studied in Swartboskloof, near Stellenbosch. Establishment requirements of …
-
Unraveling Ecological Effects on Social Behavior. Insights from Tent-roosting Bats
… that multiple ecological and environmental factors might promote variation in cohesion of social organisms, studies investigating how these factors interrelate and shape social structure have been limited. In the tropics, there are at least 23 bat species that roost in modified structures …
-
Spatial Ecology of a Vulnerable Species: Home Range Dynamics, Resource Use, and Genetic Differentiation of Eastern Spotted Skunks in Central Appalachia
… a species evaluates its surroundings and selects habitat that offers advantages to survival and reproductive success. In theory, an individual should select habitat that offers adequate resources to meet its biological requirements and allows it to adjust its use of resources based on a variety of …
-
Prevalence assessment of the amphibian chytrid fungus Batrachochytrium dendrobatidis across two habitat types in East Tennessee
… for biologists. Understanding effects of habitat variation on Bd prevalence is important for identifying populations that are most at risk and can help to inform management decisions. Using American Bullfrogs (Lithobates catesbeianus) and Green Frogs (Lithobates clamitans) as study …
-
Habitat models for plant functional groups with respect to soil parameters and management
… abiotic parameters such as soil and climatic factors and management strategy on variously utilised investigation plots. For selected species biological traits were recorded. On their basis species were grouped into biological types. With the aid of stepwise logistic regression the most …
-
Ecological and Anthropogenic Influences on a Sentinel Species' Gut Microbiome
… decreasing. Despite their propensity to occupy habitats with varying degrees of degradation and disturbance, they are not immune from the stressors that forest fragmentation places on them. Their increased exposure to humans and livestock leaves them vulnerable to cross-species transmission of …
-
Influences of forests on invertebrate communities in Icelandic streams
… types. The younger bedrock influenced various habitat factors in the streams, such as availability of nutrients, water quality, temperature and primary productivity. Therefore, these factors were found to have a greater effect on invertebrate communities in Icelandic streams than forest …
-
Carnivore ecology and conservation : implications for tiger conservation and management in Nepal /
… has been a formidable challenge due to habitat fragmentation, degradation and loss, wildlife persecution, and poaching. Consequently, wide-ranging species like tigers are now relegated to small protected areas. I evaluated factors influencing occupancy of tiger at a fine spatial-scale, …
-
Plant-habitat interactions in brackish marshes
… substances from the water and providing habitat. By buffering a large part of the arriving flow velocity, attenuating wave energy and serving as erosion control for riverbanks, tidal marshes furthermore reduce the destructive effects of storm surges and storm waves and thus contribute to …
-
Human and environmental influences on the distribution and abundance of arapaima in river floodplains of the Lower Amazon
Understanding the factors influencing the abundance and distribution of tropical floodplain fishes is an important component of fisheries management plans to support future sustainable resource use. This thesis uses a multi-scale approach to understand the habitat factors controlling the …
-
Comparative reproductive biology of co-occurring endangered and common shrubland birds
… nest survival relative to temporal and habitat factors. Additionally, I conducted reciprocal playback trials (n = 16) to test for the presence of interspecific aggression. White-eyed vireos arrived first and established territories in shrub and woodland habitat with equal probability. …
-
Development and validation of standardized sampling protocols for assessing freshwater mussel populations in Missouri
… sampling methods and to determine the effects of habitat variability on the effectiveness of these methods. At each site, we employed three visual methods for estimating mussel abundance; timed visual searches (TVS), systematic strip transects, and stratified randomly placed visual 0.25 m2 …
-
Rarity, cause or consequence: comparative landscape genomics of six lichenized fungi with contrasting range sizes, life histories, and morphologies
… variables associated with climate and habitat quality influences genetic distances in both range-restricted and widespread species. These findings underscore the role of geographic distance and habitat factors in shaping population and landscape genetic patterns associated with rarity …
-
Habitat Selection by weaver Birds in the Middle Zambezi Valley
… to their spatial distribution in the area, habitat factors and food habits. The aim was to find out what influences their selection of particular habitats. A sample of 76 nesting colonies of the different weavers were described. 14 habitat and nesting colony features were measured and were …
-
Habitat Selection by weaver Birds in the Middle Zambezi Valley
… to their spatial distribution in the area, habitat factors and food habits. The aim was to find out what influences their selection of particular habitats. A sample of 76 nesting colonies of the different weavers were described. 14 habitat and nesting colony features were measured and were …
-
Can a habitat selection model predict the distribution of moose Alces alces over multiple years?
… that species distribution is closely linked to habitat selection. Even so, few studies have investigated whether habitat selection models can predict distribution. This study investigates whether the winter distribution of a heavily managed ungulate species is predictable using models based on …
-
Landscape effects on breeding songbird abundance in managed southern Appalachian forests
… breeding songbirds and local and landscape scale habitat variables in two predominately mid- to late-successional National Forests in the southern Appalachian Mountains, USA: the French Broad Ranger District of Pisgah National Forest (North Carolina) and the Nolichucky Ranger District of Cherokee …
-
Thresholds in avian communities at multiple scales: Relationships between birds, forests, habitats, and landscapes in the Ray Roberts greenbelt, Denton
… forest corridors for wildlife dispersal between habitats in highly fragmented landscapes. Forest interior birds are of the most concern to management in riparian forests due to their population declines across much of their breeding range. This dissertation investigates the role that …
-
Landscape-scale habitat requirements of flower-visiting insects in the Nene Valley Nature Improvement Area
… within the Nene Valley NIA, ultimately producing habitat suitability maps within a Geographical Information System (GIS). <br/>This study examines data collected from 34 grassland sites between 2013 and 2015 in the Nene Valley NIA. Overall 1692 individuals were recorded, and 103 species observed, …
-
Factors affecting Wilson's Plover (Charadrius wilsonia) demography and habitat use at Onslow Beach, Marine Corps Base Camp Lejeune, North Carolina
… and little research has been conducted examining habitat factors affecting this species’ breeding and foraging ecology. I collected Wilson’s Plover demographic data and explored which habitat characteristics influenced breeding success and foraging site selection among three coastal habitat types …
Page 1 of 2