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 429 for “"transect"”.
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Line transect abundance estimation with uncertain detection on the trackline
After critically reviewing developments in line transect estimation theory to date, general likelihood functions are derived for the case in which detection probabilities are modelled as functions of any number of explanatory variables and detection of animals on the trackline (i.e. directly in the …
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Walking Home: The path as transect in an 800km autoethnographic enquiry
… articulates the notion of an autoethnographic transect using Walking Home, a particular journey that I made in 2009, as its foundation. Borrowing key terms from the fields of ethnography and ecology, the project articulates a new contribution to knowledge by expanding the notion of a transect …
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Descriptive analysis of a virtual transect through the Benguela Upwelling System
… displays a reaction to local wind forcing. A transect was performed off the coast using output from ROMS (Regional Ocean Modeling System), forced under realistic winds obtained from weekly averaged ERS data. Temporal and spatial analysis yield information on the climatological characteristics …
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Birds along a transect across KwaZulu-Natal: altitudinal preference and altitudinal migration
The special ornithological advantage of KwaZulu-Natal is the massive altitudinal gradient between the coastline and the Drakensberg Mountains, an altitudinal range in excess of 3000 m. It is one of the best places in the world to study altitudinal bird migration. This dissertation uses the bird …
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A non-linear spotlight line transect method for estimating white-tailed deer population densities
… density estimates obtained from spotlight strip transect surveys to regulate annual harvest Yet, density estimates from the standard spotlight strip transect method are known to be inaccurate in areas of dense vegetation, and alternatives such as the Hahn method, mark-recapture, or aerial strip …
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Evaluation of Aerial Transect Surveys, Survival, and Movements of Pronghorns in Western South Dakota
We evaluated aerial transect surveys, survival, and movement of pronghorns (Antilocapra americana) from 2002-2005 in western South Dakota. Survival and cause-specific mortality of pronghorns (Antilocapra americana) have been well documented in several western states and Canadian provinces; however, …
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Making oceanic plagiogranite bodies by thermal migration: evidence from the Agros transect, Troodos ophiolite, Cyprus
… be apparent as isotopic gradients in a natural transect of differentiated rocks. A spreading center melt lens, with perhaps a near order of magnitude difference between the temperatures of freshly injected on-axis mafic melts and the hydrothermally cooled off-axis crust during crustal formation, …
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Understanding variability across the Crossroad transect from 3 years (2013 to 2015) of hydrographic data
… conditions south of Africa. The Crossroad transect intersects both the Agulhas Current and Agulhas Return Current; a monitoring line established in 2013 to sample both the currents and determine inter-ocean fluxes, as well as the influence of the Agulhas Current on the Agulhas Bank shelf. …
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A description of the hydrography between Cape Town and Antarctica along the GoodHope Transect between 2004-2012
… The GoodHope programme, is a repeat annual transect between South Africa and Antarctica, monitoring the exchanges within the Southeast Atlantic sector of the Southern Ocean. This is achieved through high resolution Expendable Bathythermograph (XBT) sampling. In this study XBT data over an …
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The Biogeochemistry of iron, zinc and cobalt in the Atlantic Ocean: the Atlantic Meridional Transect and UK GEOTRACES sections
… the Atlantic Ocean along an Atlantic Meridional Transect (AMT-19). In addition, deck board incubation experiments were performed to establish the role of iron in controlling rates of di-nitrogen (N2) fixation in the North Atlantic. The distribution patterns and biogeochemistries of iron, zinc and …
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Investigation of primary productivity along the Atlantic Meridional Transect (50°N to 33°S) through fast repetition rate fluorometry
… were collected along the Atlantic Meridional Transect cruise 11 (AMTll, September-October 2000), between 50°N and 33°S in the Atlantic Ocean. Because of the large-scale nature of the study, consistent knowledge about oceanographic conditions and the phytoplankton community structure of each …
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The Distribution of Dissolved Barium Along the U.S. Geotraces North Atlantic Transect: Impact of Biogeochemical Processes, Circulation and Phase Association
<p>During the last four decades, since the completion of the GEOSECS program, there has been a growing interest in the biogeochemical cycle of barium (Ba) due to its potential as a proxy for interpreting the geologic record. The typical barium distribution exhibits removal in the upper water column …
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Origin and Tectonic Evolution of Gondwana Sequence Units Accreted to the Banda Arc: A Structural Transect through Central East Timor
Petrographic and age analysis of sandstones, detailed structural analysis and gravity modeling were conducted to investigate the origin of the Gondwana Sequence in the Timor Region, and to better constrain the tectonic evolution of the active Banda Arc. Our field studies and U/Pb zircon age …
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Relationships between soil chemical properties and forest structure, productivity and floristic diversity along an altitudinal transect of moist tropical forest in Amazonia, Ecuador.
Entlang eines Höhentransektes von ungestörten höheren Tiefland zu montanen Primärwäldern in Nordost Ecuadors, im Gebiet des Sumaco Biosphären Reservates (SBR), untersuchten wir die die Hypothesen, dass (1) die Verfügbarkeit von Phosphor niedrig ist in den tiefer gelegenen Wäldern und mit …
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Lateglacial to Holocene climatic and environmental changes in Europe : multi-proxy studies on lake sediments along a transect from northern Italy to northeastern Poland
Sediment records of three European lakes were investigated in order to reconstruct the regional climate development during the Lateglacial and Holocene, to investigate the response of local ecosystems to climatic fluctuations and human impact and to relate regional peculiarities of past climate …
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From the Foreland and Retroarc Thrust Belts to the Mantle Transition Zone: First Multi-Scale Retrodeformable Transect of the Active 90 mm/yr Taiwan Arc-Continent Collision
… presents integrated multi-scale retrodeformable transects of the Taiwan arc-continent collision. Chapter 1 presents reprocessed marine seismic reflection profiles of the retroarc thrust belt near Chimei Canyon offshore eastern Taiwan, which is one of the largest submarine canyons around Taiwan …
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Understanding longitudinal ADCP measurements to determine water velocities for open channel flow
… on time-averaged stationary measurements and transect measurements (performed for cross sections roughly perpendicular to the flow) to describe complex hydraulic processes. This research seeks to understand a longitudinal acoustic Doppler current profiler (ADCP) measurement approach as an …
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Evaluation of shrub removal effects on understory richness and diversity in a native grassland
… prairie, disturbed prairie referred to as transect prairie and old field) and span a total of 6 years, with a baseline sample before treatment and 4-5 years of post-treatment data, depending on the plot. In 2013, 5 plots were also added in a patch of shrub-encroached prairie adjacent to the …
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Forest songbird abundance and viability at multiple scales on the Monongahela National Forest, West Virginia
… In each study I used landscape (25 km2), transect (2500 m), and point (50-m radius point count plot) scales.;In the first study, I investigated bird abundance and species richness at these scales in four major forest types: mixed mesophytic, northern hardwoods, red spruce, and dry oaks. At …
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Comparison of GPS Point Selection Methods for GIS Area Measurement of Small Jurisdictional Wetlands
… methods include (1) equal time interval, (2) transect and (3) intuition. Four two-acre shapes were measured with each GPS method and brought into GIS for area calculation. Analysis of variance and Root Mean Square Error analyses determine that the transect method is an inferior point selection …
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