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Articles 91 - 103 of 103
Full-Text Articles in Entire DC Network
Tidal Freshwater And Oligohaline Benthos: Evaluating The Development Of A Benthic Index Of Biological Integrity For Chesapeake Bay, Robyn C. Draheim
Tidal Freshwater And Oligohaline Benthos: Evaluating The Development Of A Benthic Index Of Biological Integrity For Chesapeake Bay, Robyn C. Draheim
Dissertations, Theses, and Masters Projects
No abstract provided.
Ecosystem Analysis Of Water Column Processes In The York River Estuary, Virginia: Historical Records, Field Studies And Modeling Analysis, Yongsik Sin
Dissertations, Theses, and Masters Projects
Analyses of EPA long-term datasets (1985--1994) combined with field studies and ecosystem model development were used to investigate phytoplankton and nutrient dynamics in the York River estuary. Analysis of the EPA dataset showed that algal blooms occurred during winter-spring followed by smaller summer blooms. Peak phytoplankton biomass during the winter-spring blooms occurred in the mid reach of the mesohaline zone whereas during the summer bloom it occurred in the tidal fresh-mesolialine transition zone. River discharge appears to be the major factor controlling the location and timing of the winter-spring blooms and the relative degree of potential nitrogen (N) and phosphorus …
Environmental Science Curriculum For Eleventh Through Twelfth Grade Classes, Jenelle Sue Bryan
Environmental Science Curriculum For Eleventh Through Twelfth Grade Classes, Jenelle Sue Bryan
Theses Digitization Project
No abstract provided.
An Autecological Study On Iris Pseudacorus L. (Iridaceae), Ali Engi̇n, Nezahat Kandemi̇r, Gülcan Şenel, Mustafa Özkan
An Autecological Study On Iris Pseudacorus L. (Iridaceae), Ali Engi̇n, Nezahat Kandemi̇r, Gülcan Şenel, Mustafa Özkan
Turkish Journal of Botany
The ecological properties of Iris pseudacorus L., a marsh plant species, were investigated. The analysis of N%, P% and K% in the below-ground and above-ground parts of the plant was carried out. In addition, soil samples were collected and their physical and chemical aspects were analyzed.
The Completeness Of The Pleistocene Fossil Record: Lmplications For Stratigraphic Adequacy, Benjamin J. Greenstein, John M. Pandolfi, H. Allen Curran
The Completeness Of The Pleistocene Fossil Record: Lmplications For Stratigraphic Adequacy, Benjamin J. Greenstein, John M. Pandolfi, H. Allen Curran
Geosciences: Faculty Publications
Chapter 4 of The Adequacy of the Fossil Record. Edited by S.K. Donovan and C.R.C. Paul
Ecology Of The Eastern Cottonmouth (Agkistrodon P. Piscivorus) At Back Bay National Wildlife Refuge: A Comparative Study Of Natural And Anthropogenic Marsh Habitats, Chad Lee Cross
Biological Sciences Theses & Dissertations
Mark-recapture sampling and radiotelemetry were used to investigate populations of the eastern cottonmouth, Agkistrodon p. piscivorus, in both natural and anthropogenic marsh habitats at Back Bay National Wildlife Refuge (BBNWR), Virginia Beach, Virginia from autumn 1995 to late spring 1998. Mark-recapture subjects were captured, marked by ventral scale-clipping, and released back into the population. A modified Schnabel Census estimator was used to estimate population sizes and corresponding densities in both marsh systems based on a total of 244 captures of 222 individuals. Most snakes were found >0.05 in from water, but it was apparent that proximity to water played …
A Hydrological Investigation Of Three Devon Sand Dune Systems; Braunton Burrows, Northam Burrows And Dawlish Warren, Rachel Jane Burden
A Hydrological Investigation Of Three Devon Sand Dune Systems; Braunton Burrows, Northam Burrows And Dawlish Warren, Rachel Jane Burden
School of Geography, Earth and Environmental Sciences Theses
In 1993 concerns were expressed by English Nature that Devon's three largest sand dune systems Braunton Burrows, Northam Burrows and Dawlish Warren were drying out to the detriment of the dune habitat flora and fauna. Research was therefore required to understand how these systems functioned hydrologically, to determine whether they were drying out and if so to recommend sustainable management options aimed at reinstating former water levels, or preventing any further lowering of the water tables. At Braunton water table elevations have been monitored on a monthly basis by the Nature Conservancy, the Nature Conservancy Council and English Nature since …
Spatial And Structural Determinants Of Residential Burglary Rates In Kitchener-Waterloo (Ontario), Martin Christopher Anstey
Spatial And Structural Determinants Of Residential Burglary Rates In Kitchener-Waterloo (Ontario), Martin Christopher Anstey
Theses and Dissertations (Comprehensive)
Traditional ecological analyses of burglary have a number of shortcomings. First, break-ins occurring within a neighbourhood have been regarded as a solely the product of local residents. Second, the relationship between burglary and its determinants has been considered constant across space. Third, the data used in ecological analysis has been treated as statistically independent. The purpose of this study is to expand upon previous ecological studies through an analysis of residential burglary in Kitchener-Waterloo, Canada Theory from environmental criminology (a discipline concerned with the spatial aspects of crime) is used in conjunction with spatial data analysis techniques and GIS technology …
The Influence Of Nitrification In Determining The Supply, Distribution And Fate Of Nitrogen In Grassland Soils, David John Hatch
The Influence Of Nitrification In Determining The Supply, Distribution And Fate Of Nitrogen In Grassland Soils, David John Hatch
Other Faculty of Science and Engineering Theses
The microbiology of nitrification has been extensively studied, but the ecology and environmental impact of the process has received less attention. The reason for this has more to do with the difficulties of conducting field experiments to examine the links with other processes which cause losses of nitrogen, than a failure to appreciate its importance in agricultural systems. This project was designed to overcome some of the limitations of existing field techniques to enable simultaneous measurements of nitrification and the major processes of N supply (mineralization) and N loss (denitrification and leaching) to be examined. The study proceeded in three …
Habitat Selection, Reproductive Success, And Impaling Patterns Of A Migratory Population Of Loggerhead Shrikes, Jeffrey D. Esely Jr.
Habitat Selection, Reproductive Success, And Impaling Patterns Of A Migratory Population Of Loggerhead Shrikes, Jeffrey D. Esely Jr.
Masters Theses
I studied habitat selection and reproductive success of a migratory population of Loggerhead Shrikes (Lanius ludovicianus migrans) as well as the temporal and spatial patterns of impaling exhibited by this population during the nesting season. The selection of breeding habitat was investigated at different spatial scales. Thirty-eight (67%) of 57 nests were located in osage orange (Maclura pomifera) trees. Shrike territories (area ≤ 200 m from nest site) contained significantly more pasture, fenceline, and perch sites, but less com, alfalfa, and forest than random sites. At larger spatial scales, more grassland was detected within 300 m …
The Role Of Bowfin, Amia Calva, In Multiple Species Management Plans, Benjamin Jacob Hausmann
The Role Of Bowfin, Amia Calva, In Multiple Species Management Plans, Benjamin Jacob Hausmann
Masters Theses
The major challenge to fisheries managers of the 21st century will be to maintain the diversity, not only of fishing opportunity, but also of traditionally non-game and economically unimportant species. With the relatively recent understanding of the importance of ecosystem level management, attention is being focused on native species that were often ignored or eradicated under past management practices. One such fish that has been largely ignored is the bowfin, Amia calva. Ecological data pertaining to bowfin natural history are limited and to date no attempt has been made to integrate bowfin into fisheries management decisions within the species native …
Ecological And Evolutionary Determinants Of Incubation Strategies In Three Sympatric Nuthatches (Sittidae), Cameron K. Ghalambor
Ecological And Evolutionary Determinants Of Incubation Strategies In Three Sympatric Nuthatches (Sittidae), Cameron K. Ghalambor
Graduate Student Theses, Dissertations, & Professional Papers
No abstract provided.
Assemblages Of Grassland Birds As Indicators Of Environmental Condition, Sharon Freshman Browder
Assemblages Of Grassland Birds As Indicators Of Environmental Condition, Sharon Freshman Browder
Graduate Student Theses, Dissertations, & Professional Papers
No abstract provided.