Oates, Holly G.

Thesis (M.S.)--University of North Carolina Wilmington, 2007. / Includes bibliographical references.

Gilmour, Fiona Louise.

Thesis (Ph.D.)--Aberdeen University, 2009. / Title from web page (viewed on Feb. 18, 2010). Includes bibliographical references.

Hollister, Jeffrey W.

Thesis (Ph. D.)--University of Rhode Island, 2004. / Typescript. Includes bibliographical references (leaves 123-130).

Campfield, Patrick Anthony.

Thesis (M.S.) -- University of Maryland, College Park, 2004. / Thesis research directed by: Marine, Estuarine, Environmental Sciences Graduate Program. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

Kaambo, Eveline

<p>A study of the microbial diversity in sediments of the Great Berg River estuary is carried out using modern molecular phylogenetic methods. The aim of this study was to determine the effect of (pollution by) the effluents of the fish industry on the composition of the microbial community in the sediments. The diversity in microbial groups of sediment samples that received wastewater from the local fishing industry was investigated by a PCR-DGGE (polymerase chain reaction-denaturing gradient g...

Touhey, Robert James

A study was conducted to determine the oxygen uptake rate of resuspended estuarine bottom sediments and the biodegradability of the organic matter released during resuspension. Oxygen uptake was measured on a Gilson Differential Respirometer and the percent biodegradability was calculated by determining the soluble organic carbon on a Beckman Carbonaceous Analyzer. A preliminary study was conducted to determine if estuarine sediments contained sufficient bacteria to exert a measurable oxygen upt...

O'Connors, Harold Blane Jr

Graduation date: 1974

Manske, Douglas Charles

The foraminiferal population of Yaquina Bay was investigated to attempt a correlation of seasonal changes in the hydrography with observed changes in the faunal distribution patterns. The results are based on data from two spatial surveys conducted in July 1966, and late February and March, 1967. The hydrography of Yaquina Bay undergoes seasonal changes closely paralleling the seasonal precipitation pattern. Except for short-term variations, the estuarine system is partly-mixed during the period...

Berglund, Lisette Aline

Successional patterns of attached estuarine diatoms were investigated using laboratory model ecosystems. Artificial substrates of acrylic plastic were exposed to 0, 4, and 10 hours of desiccation per day. Diatom assemblages that developed under temperatures normal for Yaquina Bay, Oregon (control ecosystem) were compared to assemblages that developed at temperatures elevated 10 C (heated ecosystem). Continuously submerged substrates were quickly invaded by solitary, motile and attached diatoms. ...

Iverson, Richard L.

Phytoplankton dynamics in Auke Bay, Alaska, were studied during summer, 1969. Nitrate, chlorophyll a, particulate organic carbon, phytoplankton and zooplankton species composition and hydrographic and meteorological data were collected and analyzed. Nitrate input into Auke Bay through freshwater runoff was negligible. A bloom of Thalassiosira aestivalis formed the spring bloom in Auke Bay in 1969. No phytoplankton bloom occurred during a June period when winds were light and variable. Two major ...

Kjeldsen, Chris Kelvin

Graduation date: 1967

Goodwin, Carl R.

A one-dimensional, implicit, finite-difference model is developed, calibrated and verified for three estuaries along the central Oregon coast. The model is used to generate controlled data for a large number of hypothetical estuaries. Two non-dimensional coefficients, K[subscript F], and. K[subscript I], are developed incorporating physical characteristics of the estuary which summarize the effects due to friction and inertia, respectively, These coefficients are used to explain the variability ...

Hecht, Scott A.

4-nonylphenol (NP), a surfactant degradation product, is an unregulated, ubiquitous aquatic contaminant and endocrine disruptor, for which aquatic life criteria are currently under development by U.S. EPA. The effects of NP on estuarine amphipods and chinook salmon fry were investigated, and this dissertation reports research into the impacts of NP bioaccumulation on the amphipods and resultant endocrine disruption of their juvenile salmon predators. Sensitivity to, and bioaccumulation of, NP by...

Pozarycki, Scott V.

The pesticide carbaryl is applied annually to tidelands in Willapa Bay and Grays Harbor, WA to control populations of burrowing shrimp which modify sediments making the habitat unsuitable for oyster culture. Fish trapped on sprayed mudflats are often killed, but little is known about effects on fish present in subtidal channels or migrating over treated mudflats with a flood tide. The purpose of this work was to determine the effect of estuarine carbaryl applications on fish present in these are...

Chariton, Anthony A., n/a

Three approaches were employed to examine the effects of elevated sediment trace metal concentrations on estuarine/marine macrobenthic invertebrate assemblages. The initial study examined macroinvertebrate communities along a known polymetallic gradient, Lake Macquarie, NSW (gradient study). The second study experimentally tested if sediments sourced from different locations within Lake Macquarie differentially influenced the recolonisation of benthic invertebrates. The third study investigated ...

Melville, Andrew J, n/a

The role of autotrophic production in different coastal habitats in the production of fish in estuaries is an important consideration in coastal management and conservation. In the estuarine waters of the Australian east coast, many economically important fish species occur over mudflats lacking conspicuous vegetation. I used stable isotope analysis to examine where such fish ultimately derived their nutrition, in the subtropical waters of southern Moreton Bay, Queensland, Australia. I first t...

Cira, Emily

Estuarine phytoplankton growth is often controlled by nitrogen availability. In addition to overall nitrogen loads, nitrogen form (organic vs. inorganic) is an important factor affecting estuarine phytoplankton growth and community composition. Recent studies have shown that in addition to nitrogen availability, trophic cascades and relaxation of grazing pressure may also be important for phytoplankton bloom formation in estuaries. With a goal of better understanding how nitrogen availability a...

Jee, Virginia Jan

Polynuclear aromatic hydrocarbons (PAHs) are a class of contaminants commonly found in bottom sediments near highly industrialized areas. Resuspension of these sediments can make these contaminants more available for dispersal into the marine environment. The process will also cause the oxidation-reduction characteristics of the sediments to change from anaerobic to aerobic. Bacteria in these sediments have been shown capable of degrading 2 and 3 ring PAHs under aerobic conditions. This research...

Smar, Daina

The following is a compilation of field data collected in 2011 and 2012 in Apalachicola, FL as part of a five year study assessing the ecological effects of sea level rise in the northern Gulf of Mexico. Many coastal communities, both natural and developed, will soon be working to mitigate the effects of sea level rise, if they are not already doing so. This thesis investigates the natural patterns of the Apalachicola estuarine system through the collection and analysis of in situ water, sedimen...

Fru Azinwi, Nche-Fambo.

St. Lucia estuarine lake system has a history of episodic droughts and floods leading to a high variability in physico-chemical characteristics which may influence the community structure of nano- and microplankton that are the main primary energy synthesisers in aquatic systems. Originally, the St. Lucia estuary and the Mfolozi River shared the same mouth with the Mfolozi River acting as the main source of fresh water to the system and as stabiliser of the common inlet. Due to prolonged mou...

Sahoo, Debabrata

Environmental flows are important to maintain the ecological integrity of the estuary. In a watershed, it is influenced by land use land cover (LULC) change, climate variability, and water regulations. San Antonio, Texas, the 8th largest city in the US, is likely to affect environmental flows to the San Antonio Bay/Guadalupe Estuary, due to rapid urbanization. Time series analysis was conducted at several stream gauging stations to assess trends in hydrologic variables. A bootstrapping method wa...

Blickley, Twyla Michelle

<p>Engineered nanoparticles (ENPs) are a part of everyday life. They are incorporated into a wide array of products including sunscreens, clothing, electronics, paints, and automobiles. One particular type of ENP, quantum dots (QDs), are fluorescent semi&ndash;conducting nanocrystals, and are touted as the next generation of medical tracers and energy&ndash;efficient light bulbs. The continued development and expansion of commercial applications for QDs ensure that they will enter the aquatic...

Dvorak, Matthew Joseph.

Thesis (M.S.)--Iowa State University, 2007. / Title from PDF title page (viewed on May 3, 2007) Includes bibliography.

Shervette, Virginia Rhea.

"Major Subject: Wildlife and Fisheries Sciences" Title from author supplied metadata (automated record created 2010-03-12 12:08:51). Includes bibliographical references.

Shervette, Virginia Rhea

My research in coastal Ecuador and the northern Gulf of Mexico (GOM) elucidated differences in value of shallow estuarine habitats for fishes and invertebrates. I focused on mangrove and tidal river habitats in Ecuador, and oyster reef, vegetated marsh edge, and nonvegetated bottom habitats in the GOM. Coastal Ecuador has lost 20-30% of mangrove wetlands over the past 30 years. Such habitat loss can impair the ecological functions of wetlands. In this study I identified the fish community of the...

Edite Joana Manjate

No description available.

Patrícia Isabel Costa Duarte

No description available.

Dykens, James Alan

No description available.

Vogt, Bruce W.

No description available.

Voudrias, Evangelos Alexandros

No description available.

Turgeon, Donna DeMoranville

No description available.

Windsor, John G., Jr

No description available.

Sofia Martins Dias

No description available.

The geochemical behavior of Sr in the Mississippi River (MR) mixing zone is examined in an attempt to address the extent to which estuarine environments modify the fluvial flux of Sr on its way to the ocean Trace metal analyses show that particle-dynamic-related processes play an important role in the distribution of dissolved Fe, Mn and V. These same processes exert little effect on the dissolved U and Mo concentrations, as they do for Sr. Greater than 97% of the Sr in the water column is in th...

The distribution of iron in three different environments has been studied in an attempt to understand what processes control its concentration in the open ocean. In the Ochlockonee Estuary, dissolved Fe concentrations are dominated by a high molecular weight colloidal fraction ($>$10,000 molecular weight) that is also significant in controlling the dissolved organic carbon concentration. These Fe-oxyhydroxides are greater than 80% removed before the salinity reaches open ocean values. In the eas...

Spies, Annette

The data presented in this thesis are the result of laboratory experiments, executed concurrently with a year-long field study. Microcosms (20 1 volume) were filled with mixtures of natural low and high salinity waters in order to give a salinity range from ≤ 5 ppt, 10 ppt, 18 ppt to ≥ 26 ppt. The mixed waters were enriched so as to simulate the entrainment of nutrient-rich, saline water in a salt wedge estuary. Nitrate-N (20 μg-at 1⁻¹), phosphate-P (2 μg-at 1⁻¹) and silicate-Si (50 μg-at 1⁻¹) ...

Villanueva Álvarez, Laura

Microbial mats are prokaryotic communities that are thought to represent the present-day analogues of the first ecosystems on Earth. Their study reveals microbial strategies for survival under a broad range of environments. The aim of this work was the application of new techniques and combination of existing ones to give an integrated vision of the structure and physiology, and also characterize less-known microbial populations involved in important processes in the mat. As a result of this stu...

Phelan, Richard B.

No description available.

DeMort, Carole Lyle

The biochemical composition of ten species of estuarine phytoplankton was determined. Studies were made of their growth in various culture media and of their relative value as food for oyster larvae. Nine of the species were isolated from Yaquina Bay, Oregon. An attempt was made to select species which commonly occurred in the phytoplankton of the bay. The tenth species, Isochrysis galbana, was obtained from the Culture Collection of Algae at Indiana University. The ten organisms comprised three...

Peterson, Paul Edward

Core samples from five sites in the Yaquina and Coos Estuary were assayed for vertical distribution of total sulfides, percent volatile solids, redox potential, particle size, total aerobic and sulfate reducing bacteria. Higher total sulfide levels were found at sites having more than four percent volatile solids, redox potential below -100 millivolt, and with more than 80 percent fine particles. Free sulfides and dissolved oxygen were found simultaneously in the water one cm. above the sediment...

Riznyk, Raymond Zenon

The benthic microalgae of sediments of the two tidal flats in Yaquina Bay, Oregon were investigated to determine the environmental factors limiting the abundance and the horizontal and vertical distribution of these organisms. The Southbeach tidal flat which is under the marine realm of deposition consists of fine to medium grained sand. The Sally's Bend tidal flat is under the fluviatile realm of deposition and consists of silt. Measurements were made of interstitial temperatures, movements of ...

Davies, Warren Raymond, warren.davies@optusnet.com.au

Nodularia spumigena is an estuarine cyanobacteria that produces the toxin nodularin. This toxic cyanobacteria is known to have caused death to domestic and wild animals and is recognised as dangerous to human health. N. spumigena causes harmful algal blooms in many parts of the world including Australia. The toxic solutes of N. spumigena are potentially dangerous when contact is made to contaminated water bodies or is ingested by primary consumers. In Australia blooms of N. spumigena are common ...

Schacht, Christie, n/a

The knowledge and understanding of sediment transport is essential for the development of effective management strategies for nutrient and sediment loading in estuarine systems. Estuarine suspended sediment (in high concentrations), has the ability to adversely impact upon surrounding ecosystems, such as the Great Barrier Reef, Australia. Due to a recent decline in water and sediment quality, it has recently been mandated that a number of tropical, coastal estuarine systems in Queensland, such a...

Burton, Edward D., n/a

An improved understanding of the geochemical partitioning of trace metals and tributyltin (TBT) in sediments is of great importance in risk assessment and remedial investigation. The aim of this thesis was to examine the distribution and partitioning behaviour of trace metals and TBT in benthic, estuarine sediments. This was achieved by a series of field- and laboratory-based studies investigating factors controlling the geochemical behaviour of trace metals and TBT in sediments from south-east ...

Lee, Chang-Hee

The resuspension behavior of natural estuarine sediments was studied using the VIMS Sea Carousel, a benthic annular flume. The bed shear stresses produced by the flume were measured by a hot-film sensor mounted flush on the bottom of a laboratory version of the Carousel under a clear-water and flat-bottom condition. Measurements showed a reasonably uniform bed shear stress across the channel and agreed with the relationship &\tau\sb{lcub}\rm b{rcub}=0.011\Omega\sp{lcub}1.69{rcub},& where &\Omega...

Fugate, David C.

The research presented in this study is motivated by the need to improve prediction of sediment transport in estuaries. A novel application of the Acoustic Doppler Velocimeter (ADV) in the lower Chesapeake Bay is shown to estimate in-situ particle fall velocity at a single point without affecting the ambient turbulence. Acoustic backscatter from the ADV proved to be the best estimator of mass concentrations due to its apparent insensitivity to the size or density of muddy aggregates. Fall veloci...

Wong, Carol Hee Ting

The estuarine tube dwelling amphipod Paracorophium excavatum was investigated for its suitability as a bio-indicator and bio-monitor. Distribution patterns of P. excavatum were determined at 13 sites in the Canterbury region that differed in particle size distribution ranging from sandy to muddy sediment, with overall low organic content. Low tide salinity ranged from 5 to 33 0/00 between sites and sediment moisture content ranged between 23 to 41% moisture. Amphipods were absent from most sites...

Cantwell, Mark G.

Thesis (Ph. D.)--University of Rhode Island, 2006. / Typescript. Includes bibliographical references (leaves 140-150).

Korpalski, Thomas Paul

Waters of various salinities were secured from the Umpqua estuary, the Umpqua River, and the open ocean near the mouth of the estuary. The rate of oxidation of sulfides in these various waters was investigated to assess the potential longevity of free sulfides in estuarine waters. The rate of disappearance of sulfides showed no simple relationship with salinity. Estuarine water exhibited the fastest rate of oxidation with decreasing rates observed in river water and open ocean water. The effects...

Flegal, Arthur Russell

Graduation date: 1979