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 219 for “"Habitat types"”.
-
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 …
-
Differences in Fish Abundance Among Habitat Types in a Warmwater Stream; The James River, South Dakota
… conducted to gather information regarding fish habitat in the James River, SD. Fish abundances were quantified and compared among habitats created by large, instream features. Four physically complex habitat features were studied: hardbottom (areas of gravel or rubble substrate), snags (woody …
-
Influence of habitat and bat activity on moth community composition and seasonal phenology across habitat types
… conservation strategies. Studies of moth habitat use have primarily focused on access to host plants used by specific moth species. How vegetation structure influences moth communities within and between habitats and mediates the activity of insectivorous bats is understudied. Previous …
-
Patterns of plant species richness and diversity across two habitat types in the Upper Karoo, South Africa
… relative cover, and growth form diversity in two habitat types (i.e. plains and rocky dolerite hillslopes), and along a longitudinal environmental gradient. A pairwise floristic survey approach was implemented, using modified Whittaker plots in each habitat type at 30 sites within the shale gas …
-
Climate change impacts on habitats and biodiversity : From environmental envelope modelling to nature conservation strategies
… species distribution, diverse consequences for habitats, changing communities as well as biotic interactions and general aspects of diversity are the major challenges. The potential climatic modifications can alter deeply the distribution of animals and plants. Range changes due to recent …
-
An examination of temporal trends, regional variation, and habitat-type differences in site-level Floristic Quality, and their implications for the use of Floristic Quality Assessment
… patterns, their variation among different habitat-types, and their trends over time. I used site-level vegetation data from an Illinois statewide habitat monitoring program (Critical Trends Assessment Program, CTAP) to characterize FQA metric properties across regions and habitat-types. I …
-
Avian habitat relationships in the Mojave Desert
… years (1994-1996) in a variety of Mojave Desert habitat types. This study addressed two fundamental questions: what plant community characteristics are statistically related to bird species diversity and the density of individual bird species, and what is the affect of neighboring habitat on bird …
-
Habitat Selection in Four Sympatric Small Mammal Species and the Effects of Potential Predators on Peromyscus Leucopus
… effects of potential predators in relation to habitat selection in Peromyscus leucopus. I also examined habitat selection in three other sympatric species (Blarina brevicauda, Blarina carolinensis, Sorex longirostris). I utilized data fiom 49 sampling sites on National Park Service land; …
-
Examination of small mammal diversity in the riparian areas of Walden, Tennessee
… that riparian zones are prime conservation habitats and can be used as indicators of general ecosystem health (Montgomery 1996). Riparian zones, comprising a range of habitat types, typically exhibit higher biotic diversity when compared to adjacent upland hardwood forests (Batzli 1977, …
-
Response of black bears to gypsy moth infestation in Shenandoah National Park, Virginia
… National Park (SNP) black bear population and habitat were studied during 1985 - 1991 by comparing radio telemetry, population, and behavioral data from preinfestation years (1982 - 1986) and years with extensive defoliation (1987 - 1991). Gypsy moth defoliation (> 60% canopy loss) increased …
-
Habitat Use And Seasonal Activity Of Selected Snakes On John F. Kenned
… sampling of snake communities inhabiting four habitat types was conducted at John F. Kennedy Space Center, Brevard County, Florida from November 2002 through October 2003. Thirteen species (580 individuals plus 74 recaptures) plus one hybrid were captured. The three most commonly captured …
-
The vascular flora of the North Chickamauga Creek Gorge State Natural Area, Hamilton & Sequatchie Counties, Tennessee
… deciduous forest that contain 12 distinct habitat types. A survey of these habitat types over three growing seasons yielded 110 families, 329 genera, and 604 species or lesser taxa, including 238 county records. Seventy-six introduced species were found, comprising 12% of the total flora. …
-
The distribution and habitat preferences of wild ungulates and cattle in Lochinvar National Park, Zambia and the use of resources by people living adjacent to the park
(1) The distribution and habitat preferences of wild ungulates and cattle were determined from observations and counts in Lochinvar National Park and the Game Management Area (GMA) on the west em part of the park on the Kafue river floodplain of Zambia over five months. Oribi, zebra and lechwe were …
-
Selection and Use of Aquatic Vegetation by Migratory Waterfowl in North Central Texas
… categorized by dominant plant species into eight habitat types. Census with waterfowl species identification were performed to investigate impacts of aquatic vegetation and water depth on waterfowl. Eighteen waterfowl species were observed. Peak migration occurred in late December/early January. …
-
Dispersion patterns of Holarctic-breeding, migrant landbirds : global paradigms or regional patterns?
… quantifies the breeding and wintering ranges, habitat occupancy, diet and foraging mode of each migrant taxon on each of the three flyways. It aims to compare how patterns of migration between the temperate and tropical latitudes vary spatially in response to a) the geography of the land …
-
Hurricane and human-induced habitat changes on Fire Island and Westhampton Island, New York, and the effects on breeding piping plovers (Charadrius melodus)
… The goal of this thesis was to quantify habitat changes after Hurricane Sandy, and assess habitat use of piping plovers specifically in human-created restoration areas. We created land cover maps using an object-based classification method (overall accuracy 85%), and field-collected data …
-
Habitat use by fishes of the New River, West Virginia
… of the species and life stages in different habitat types were made from electrofishing collections and underwater fish counts. During midday, fish densities in edge pool and riffle habitats were comparable, but densities in edge pool habitat were significantly higher than densities in middle …
-
A study of avian nest predation at Audubon Acres in Chattanooga, TN
… biology by affecting life histories and habitat selection. Artificial nests are commonly used to study nest predation because they allow the researcher to investigate comparative treatments and their impact on predation. Relative nest predation was studied at Audubon Acres in Chattanooga, …
-
White-tailed deer hunting and habitat use in Robert Allerton Park
… objectives were to investigate changes in deer habitat use and spatial clustering following 10 years of deer removal in RAP. I evaluated changes in annual deer counts within RAP’s three main habitat types, dry mesic upland forest, wet mesic floodplain forest and developed land using a …
-
Street-wise : does prey abundance buffer black sparrowhawks (Accipiter melanoleucus) from the negative health impacts of urbanisation?
… prey abundance within different territories and habitat types. The health of nestling Black Sparrowhawks was evaluated through their immune response (Heterophil/Lymphocyte ratio in white blood cell counts), body condition (based on morphometric measurements) and blood parasite infection (presence …
Page 1 of 11