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 426 for “"transects"”.
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Distributions and diversity of aerobic anoxygenic phototrophic bacteria along onshore offshore transects near Pacific Islands
… the pufM biomarker along onshore/offshore transects near 5 distinct islands in the Pacific Ocean (Oahu, Molokai, Futuna. Aniwa, and Lord Howe) with steep environmental gradients. Abundance patterns are further explored by investigating the genetic diversity of the AAP community using pufM …
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ASSESSING THE PERFORMANCE OF SAMPLING DESIGNS FOR MEASURING ABUNDANCE OF UNDERSTORY PLANTS AFTER FOREST RESTORATION
… methods (modified Whittaker plots, Daubenmire transects, point line intercept transects, and strip adaptive cluster sampling) to estimate the cover of 24 understory species that vary in abundance. Compared to Daubenmire and point line intercept transects, modified Whittaker plots estimated …
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ASSESSING THE PERFORMANCE OF SAMPLING DESIGNS FOR MEASURING ABUNDANCE OF UNDERSTORY PLANTS AFTER FOREST RESTORATION
… methods (modified Whittaker plots, Daubenmire transects, point line intercept transects, and strip adaptive cluster sampling) to estimate the cover of 24 understory species that vary in abundance. Compared to Daubenmire and point line intercept transects, modified Whittaker plots estimated …
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Responses of fruit-feeding butterflies to selective logging in Sabah, Borneo
… (Nymphalidae). Traps were set up along four transects on existing paths and trails in unlogged forest (two transects, total length 4 km) and logged forest (two transects; total length 4 km). Traps were hung 1-2 m from the ground at 100 m intervals along transects (total of 80 traps). Traps …
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Macrohabitat factors affecting distribution patterns of freshwater mussels in the Clinch River (Virginia, Tennessee)
… rank-sum tests were conducted separately for all transects, unbraided (without islands) transects, and braided (anastomosing river channels with islands) transects. Stepwise discriminant analysis (SDA) was used in the first habitat study to identify variables which best differentiated high and low …
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Long-term monitoring of vegetation dynamics in the Goegap Nature Reserve, Namaqualand, South Africa
… first monitoring was done in 1974 when two line transects, of 1 km each, were surveyed. These surveys have been repeated annually covering a period of more than 30 years. When the reserve was enlarged in 1990, five additional line transects were set out in highly degraded areas. The main aim of …
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Patterns of Population Structure and Hybridization within and between Populus trichocarpa and Populus balsamifera
… genome of 574 poplar trees from six east-west transects across the hybrid zone between Populus trichocarpa and Populus balsamifera in western North America. I used these data to characterize population structure within and between transects, and hybridization between the species. There was a …
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The ecology and distribution of rockboring pelecypods off Del Monte Beach, Monterey, California
… and mapping survey was made. along two transects, one of which would be subjected to radical ecological change after isolation from the open sea by a proposed breakwater project. Most species found are common to both transects. Their distribution is variable and depends to a great extent …
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Factors Influencing Use of Fecal Line Surveys For Estimating Trends in Predator Populations in Western South Dakota
… study were to determine the minimum number of transects needed and probability of finding a coyote , red fox , and striped skunk fecal pile on fecal line transects placed in various land uses and road types in western South Dakota , to determine if temporal variation of these populations …
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SPATIAL VARIABILITY IN SPECIES COMPOSITION IN NEOTROPICAL MONTANE TREE COMMUNITIES
… installed (1) along three different elevational transects in tropical montane cloud forest (TMCF) between 1500 and 3600 m and (2) across a ∼ 40 km landscape transect near tree line above 3200 m in southeastern Peru. Stand variables were correlated with explanatory variables such as geographic …
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Volcanic framework and geochemical evolution of the Archean Hope Bay Greenstone Belt, Nunavut, Canada
… volcanic and sedimentary rocks. Mapping of two transects in the southern section and two transects in the northern section have contributed to a robust stratigraphic framework the belt. Three recently discovered Archean lode gold deposits in the Hope Bay Greenstone belt have associations with …
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High resolution modeling of tick density and detection of Rickettsia spp. in Dermacentor spp. ticks at Turnbull National Wildlife Refuge, WA
… the public use area of TNWR. To do so, 50m transects (27 in total) were established across the public use area. Ticks were collected weekly within the transects from March 26th – June 5th, 2018. The transects were characterized by measuring percent vegetative cover, small mammal abundance, …
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A comparison of seedling diversity and abundance in the range of howler monkeys (Alouatta palliata) in Bocas del Toro, Panama
… this initial observation period, I constructed transects in random directions covering the entire tree crown underneath sleeping trees. I collected and counted every dicot seedling shorter than 30 cm. I identified the seedlings in the lab, to the species level when possible, and repeated the …
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Size distributions, population dynamics, and single-cell properties of marine plankton in diverse nutrient environments
… regimes, both natural and manipulated. Three transects in the Atlantic provided a natural range of nutrient environments, especially because they captured seasonal variations. The transects encompassed Sargasso Sea, Gulf Stream, and coastal waters, during winter, spring, and summer. Nutrient …
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Investigation of iron isotope variability in the bimodal Aztec Wash Pluton, Eldorado Mountains, Nevada
… I have analyzed samples collected from transects oriented paleo-vertically and paleohorizontally through the Miocene-aged Aztec Wash Pluton (AW). AW is a bimodal, reversely zoned pluton, consisting of an outer “rim” of granite (the granite zone) underlain by the heterogeneous zone, which …
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Investigating the biogeochemistry of the Mozambique Channel thermocline using an optimum multiparameter analysis approach
… source waters to the thermocline across four transects sampled in the southwestern Indian Ocean, one at either end of the Mozambique Channel and two across the upper Agulhas Current. Three thermocline source regions proximate to the Mozambique Channel were identified (equatorial, tropical and …
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The influence of habitat disturbances on bird populations
… and clover were 0.9 to 108 acres in size. Four transects, 200 ft X 1,000 ft, were located in each of the following habitats: cut and uncut, bottom and middle slope stands. Three transects were located in cut and three in uncut middle slope stands with wildlife clearings. Twenty transects were …
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Assessing the Recalibration Interval for Nearshore Sediment Assemblages after Hurricane Irma: implications for Developing Long-term Records of Overwash Deposits
… was collected from three shore-perpendicular transects on both the northern and southern shores of Anegada. Partitioning Around Medoids cluster analysis using the <em>Homotrema</em> data revealed that Hurricane Irma introduced an influx of well-preserved <em>fragments</em> into the reef flat …
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Variability of soil erodibility: its relationship to topography and soil properties in cultivated landscape
… at five slope positions along eleven slope transects on fallow agricultural land in hummocky terrain. Soil erodibility variations among the five slope units were examined for significant differences. The slope units were found to be ranked in descending order by mean soil erodibility as …
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