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 93 for “"spatial and temporal variation"”.
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Spatial and temporal variation in precipitation pattern
The intensification of hydrological cycle and its nature is an important question in hydrology. The human activities are a major cause of change in hydrological cycle. The fluctuations in hydrological cycle can influence the dynamics of ecosystem. The changes in global water cycle and the …
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Spatial and temporal variation of the phytoplankton in Cayuga Lake
… August 1973. The objectives were to: a) describe variation in nutrient parameters in vertical and horizontal space, within years, and historically where data were available, b) describe the phytoplankton (pigment, biomass, and species composition) along the same dimensions, c) analyze the …
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Spatial and Temporal Variation of Wind Above and Within a Soybean Canopy
Made available in DSpace on 2014-12-12T00:17:44Z (GMT). No. of bitstreams: 1 7121207.pdf: 2797517 bytes, checksum: c57fd469a4acd2292538198acdab7386 (MD5) Previous issue date: 1971
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Spatial and temporal variation in virtual water transfers on the U.S. electric grid
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-05-01
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An analysis of spatial and temporal variation in fecal indicator concentrations in Singapore
… of indicator concentrations to describe spatial and temporal patterns of four fecal indicators: E. coli, enterococci, total coliform, and human factor. Twenty twelve-hour time series were examined, with indicator concentrations measured every hour from 8 am to 7 pm. Six stations in …
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Spatial and Temporal Variation in Lake Huron Yellow Perch (Perca flavescens) Life History Traits
… incorporates elements of genetics, environment, and resource use simultaneously. In Lake Huron, the yellow perch (Perca flavescens) is managed based on 17 geographic management units; however, it is unknown if management units accurately represent discrete perch groups. Furthermore, it is unclear …
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Incorporating Spatial and Temporal Variation of Watershed Response in a GIS-based Hydrologic Model
… accuracy would be improved by accounting for spatial and temporal variation of excess rainfall. Three models with different methods of estimating excess rainfall were developed: the Distributed Curve Number (DCN) model uses a CN for each cell, generating spatially distributed excess rainfall …
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From genes to species: Characterizing spatial and temporal variation in frog and toad multidimensional biodiversity
… is a complex concept encapsulating the variation that occurs within and among levels of biological organization. It is positively linked to ecosystem persistence, adaptability, and function. Biodiversity loss, driven by global change and human activities, is one of the most prominent …
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Spatial and temporal variation In greenhouse gas flux as affected by mowing on grasslands of hummocky terrain In Saskatchewan
… terrain in Saskatchewan is an understudied landscape contributing an unknown quantity of greenhouse gases (GHGs) to global climate change. The objectives of this study were to determine the effects of topography and mowing on carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) flux …
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Spatial and temporal variation in stomatal response to climate: a case study of modern and herbarium samples of Salix
… between atmospheric carbon dioxide (CO₂) levels and climate with the stomatal abundance of Salix cinerea (Grey Willow). There are three principle objectives of this research:1. Develop a methodology for obtaining S. cinerea stomatal countsa. In terms of leaf preparationb. In terms of checking for …
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Effects of Spatial and Temporal Variation in Resource Availability on the Growth Rates and Survival of Dunlin (Calidris Alpina Hudsonia) Chicks
… the Arctic experience condensed breeding seasons and shorter periods of high arthropod availability due to climate change. Shorebirds have precocial chicks which may compensate for food shortages by responding to spatial and temporal variation in arthropod availability. I hypothesize that …
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Spatial and Temporal Variation in Growth Rate of Blue Rockfish (Sebastes mystinus) in Nearshore Central California Determined Using a Physiological Biomarker
… for protecting habitats essential to fish growth and reproduction and, ultimately, for achieving sustainable fisheries. Historically, evaluations of habitat quality have relied heavily on linking spatial variation in fish abundance to environmental parameters such as substrate category, depth, or …
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Observations on myxozoans (Myzozoa: Myxosporea) and the spatial and temporal variation in parasite assemblages of the nosestripe klipfish, Muraenoclinus dorsalis Bleeke, 1860 (Perciformes: Clinidae)
… 1860, captured from Granger Bay, Kommetjie and Jacobsbaai, South Africa during Summer 2008/2009 and Winter 2009 revealed twenty-three parasitic species. Five myxozoans, all likely new to science, were found to infect M dorsalis. Ceratomyxa sp. and Sphaeromyxa sp. 1 were found in the gall …
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Spatial and temporal heterogeneity in life history and productivity trends of Atlantic Weakfish (Cynoscion regalis) and implications to fisheries management
… models. This thesis addresses the effects of spatial and temporal heterogeneity on stock assessment models using Atlantic Weakfish (Cynoscion regalis) as a case study. First, spatial and temporal variation was incorporated into length-, weight-, and maturity-at-age estimates using …
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Spatial and temporal variability of carbon stocks within the River Colne Estuary
… aim of this study is therefore to better understand the spatial and temporal variation of saltmarsh sediment total organic carbon (TOC) content. Therefore, three saltmarshes along the salinity gradient of the Colne Estuary were studied. The effect of the study sites’ locations along the estuary, …
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The influence of spatiotemporal variation in food web models
… fluxes in season, temperature, nutrient cycling, and prey availability. Consequently, aquatic food webs are dynamic, and relationships between species are perpetually changing as organisms and primary producer communities adapt to current environmental conditions both in time and space. Despite …
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Evaluation of the UAV-Based Multispectral Imagery and Its Application for Crop Intra-Field Nitrogen Monitoring and Yield Prediction in Ontario
… (UAV) has the capability of acquiring high spatial and temporal resolution images. This new technology fills the data gap between satellite and ground survey in agriculture. In addition, UAV-based crop monitoring and methods are new challenge of remote sensing application in agriculture. …
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Insect-Induced Forest Disturbance Impacts on Select Water Quality Parameters in a Closed Drinking Water Reservoir
… health conditions, inputs of abiotic factors and timing of precipitation and river inflows impact drinking water reservoirs. Natural organic matter (NOM) directly impacts water treatment process effectiveness and is identified as an emerging contaminant of concern. Few studies have examined …
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