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Late Holocene Climate Variability As Preserved In High-Resolution Estuarine And Lacustrine Sediment Archives, Jeremiah Bradford Hubeny Jan 2006

Late Holocene Climate Variability As Preserved In High-Resolution Estuarine And Lacustrine Sediment Archives, Jeremiah Bradford Hubeny

Open Access Dissertations

Concern regarding human-induced environmental and climate changes is becoming higher-profile. Aquatic sediment that is preserved at the bottom of a lake, estuary, or ocean provide high-quality proxy records of environmental and climate conditions that extend past the instrumental period. This dissertation performs high-resolution proxy analyses from annually resolved sediment records in Rhode Island and central New York State to interpret the natural and anthropogenically induced changes that have occurred over the Late Holocene. The Pettaquamscutt River Estuary's Lower Basin was studied and the post-glacial stratigraphy was interpreted. High-productivity lacustrine sedimentation started at ca. 15,500 cal BP and density-stratified estuarine conditions …


A Regional Comparison Between The Seasonal Cycles Of The Western Irish Shelf And The Georges Bank, Gulf Of Maine Ecosystems: The Impact Of Physical Variability, Bronwyn Elizabeth Cahill Jan 2006

A Regional Comparison Between The Seasonal Cycles Of The Western Irish Shelf And The Georges Bank, Gulf Of Maine Ecosystems: The Impact Of Physical Variability, Bronwyn Elizabeth Cahill

Open Access Dissertations

The seasonal response of two shelf ecosystems in the North Atlantic to fluctuations in climate variability is investigated. The Western Irish Shelf and the Georges Bank/Gulf of Maine are highly productive shelf systems (>300 gC m-2 y-1) located at mid-latitudes between the subpolar and subtropical gyres in the North Atlantic, making them interesting oceanographic transition zones where different water masses, flora and fauna mix. Their boundaries expand, contract and shift position in response to fluctuations in climate variability. In this study, positive and negative NAO scenarios are used as a proxy for climate variability in these regions. A three-dimensional …


The Virtual Eelgrass Meadow: A Simulation Of Zostera Marina L. Linking Physiology To Population Level Processes, Lora Anna Harris Jan 2006

The Virtual Eelgrass Meadow: A Simulation Of Zostera Marina L. Linking Physiology To Population Level Processes, Lora Anna Harris

Open Access Dissertations

The Virtual Eelgrass Meadow (VEM) was developed to link the population dynamics of eelgrass ramets with a mechanistic, physiological model of eelgrass growth that simulates rhizome elongation rates and new lateral shoot branching in two dimensions. The programming structure relies on an Individual Based Modeling approach emphasizing the botanical details of eelgrass ramet production and utilization of space. Growth rates depend on forced values of nitrogen loading and sediment sulfide concentrations, as well as the dynamic variables of light and temperature that also determine allocation of new production to leaves, rhizomes, or new lateral shoots. The pattern of lateral shoot …


Interannual And Seasonal Phytoplankton Variability In Massachusetts Bay From Remote And In Situ Measurements, Kimberly Joy Whitman Hyde Jan 2006

Interannual And Seasonal Phytoplankton Variability In Massachusetts Bay From Remote And In Situ Measurements, Kimberly Joy Whitman Hyde

Open Access Dissertations

This study investigated the feasibility of augmenting monitoring data collected in Massachusetts Bay with satellite ocean color data to increase the spatial and temporal resolution of quantitative phytoplankton measurements. In coastal regions such as Massachusetts Bay ocean color remote sensing can be complicated by in-water constituents whose quantities vary independently of phytoplankton and by inaccurate modeling of absorbing aerosols. An evaluation of in situ and SeaWiFS measurements demonstrated that SeaWiFS overestimated chlorophyll a mainly due to atmospheric correction errors that were amplified by absorption from elevated concentrations of chlorophyll a and color dissolved organic matter. A regional empirical algorithm was …


"Man With Box", David D. Malley Jan 2006

"Man With Box", David D. Malley

Open Access Dissertations

Dating back to Edgar Allen Poe, short story criticism has pointed to the genre's ultimate and crucial goal of achieving an effect upon the reader. Indeed, a short story's effect upon the reader is integral to an explication of the story's themes. Further, the short story in its purest form visits upon the reader the effect of experiencing a perception of reality which lacks those psychic defense mechanisms that dominate our perceptions in everyday life. One can achieve the effect spoken of above in a number of ways. However, given my chosen themes in this collection of stories, the majority …


Effects Of Endocrine-Disrupting Chemicals On Fish Reproduction And Reproductive Indicators, Lesley Judith Mills Jan 2006

Effects Of Endocrine-Disrupting Chemicals On Fish Reproduction And Reproductive Indicators, Lesley Judith Mills

Open Access Dissertations

The central hypothesis tested in this dissertation is that endocrine-disrupting chemicals (EDCs) found in the aquatic environment disrupt reproductive processes in fish. To gain a broad perspective of existing evidence, a review of the current literature was conducted. From this literature review, the lack of a dependable method or indicator to assess reproductive fitness of fish in situ was identified as an outstanding need. In laboratory experiments, reproductive endpoints (egg production, fertility and viablity) were measured in the marine fish Tautogolabrus adspersus , or cunner, implanted with estrogens. Estrone and ethynylestradiol significantly reduced egg production in treated cunner at the …


Metabolic Activities In Deep Subseafloor Sediments, Guizhi Wang Jan 2006

Metabolic Activities In Deep Subseafloor Sediments, Guizhi Wang

Open Access Dissertations

Microbes in subseafloor sediments account for a significant fraction of the Earth's total biomass. It has been argued that these communities are sustained at extremely low respiration rates, based on estimates of sulfate reduction rates and cell abundances. It is conceivable, however, that respiration rates may be much higher due to iron reduction. Iron reduction is difficult to directly quantify due to the removal of dissolved Fe(II) from pore waters. Additionally, hypothetically competing respiration pathways have been suggested to co-occur in deep subseafloor sediments based on qualitative analysis of chemical profiles. Yet, the vertical distributions of these processes and the …


The Role Of Osmolyte Transporters And Heat Shock Proteins In Adaptation Of Atlantic Salmon To Selected Stressors, Jacques Zarate Jan 2006

The Role Of Osmolyte Transporters And Heat Shock Proteins In Adaptation Of Atlantic Salmon To Selected Stressors, Jacques Zarate

Open Access Dissertations

The effects of hyperosmotic and husbandry related stress on Atlantic salmon (Salmo salar) and the mechanisms employed in response were investigated. To assess the role of taurine and betaine transport proteins in contending with hyperosmotic stress, a cDNA encoding the salmon taurine transporter was cloned. Exposure of various isolated tissues to hyperosmotic stress led to a 2 to 5 fold increase in taurine transporter mRNA. The transfer of juvenile salmon to seawater in October elicited a similar response. Supplementation of culture media with taurine failed to reduce mortality or alleviate a hyperosmotic induced decrease in protein synthesis in isolated tissues. …


The Contributions Of Murine Kc And Mip-2 In Hemorrhage Induced Neutrophil Priming For Acute Lung Injury Following Subsequent Septic Challenge, Joanne Lomas-Neira Jan 2006

The Contributions Of Murine Kc And Mip-2 In Hemorrhage Induced Neutrophil Priming For Acute Lung Injury Following Subsequent Septic Challenge, Joanne Lomas-Neira

Open Access Dissertations

Trauma patients represent a significant risk for the development of ALI following exposure to a secondary infectious challenge. This risk is suggested to be associated with an event that "primes" certain members of the immune cell population such that a subsequent/secondary challenge elicits a dys-functional response. Characteristics of ALI are neutrophil sequestration in the lung, delayed neutrophil apoptosis and increased pro-inflammatory cytokines. Chemokines are proteins produced by immune and resident tissue cells in response to inflammation and function as regulators of neutrophil trafficking and cytolytic activity. Keratinocyte-derived chemokine (KC) and macrophage inflammatory protein-2 (MIP-2) are mouse homologues of human neutrophil …


Requirement Of Integrin α5β1 And Tyrosine Phosphorylation Of Shc For Prohb-Egf Release By Gpr30, A Seven Transmembrane Receptor For Estrogen, Jeffrey Alan Quinn Jan 2006

Requirement Of Integrin α5β1 And Tyrosine Phosphorylation Of Shc For Prohb-Egf Release By Gpr30, A Seven Transmembrane Receptor For Estrogen, Jeffrey Alan Quinn

Open Access Dissertations

Estrogen acts via a seven transmembrane receptor (7TMR), GPR30, to stimulate an HB-EGF autocrine loop. Here, evidence is provided that integrin α5β1 is a necessary transmembrane signaling intermediary required for matrix metalloproteinase (MMP)-mediated release of proHB-EGF by GPR30. Estrogen stimulation of human SKBR3 breast cancer cells, which lack ERα and ERβ, resulted in recruitment of integrin α5β1 to focal adhesions, formation of actin stress fibers, and assembly of fibronectin (FN) fibrils. Expression of a GPR30 mutant in SKBR3 cells selectively abrogated FN matrix assembly and EGFR tyrosine phosphorylation by estrogen. Disruption of cytoskeletal integrity or inhibition of integrin α5β1 with …


Economic-Ecological Relationships In Coastal Wetland Restoration, Gisele Marie Magnusson Jan 2006

Economic-Ecological Relationships In Coastal Wetland Restoration, Gisele Marie Magnusson

Open Access Dissertations

Proactive coastal wetland restoration addresses historical losses and is not for compensatory regulation. Such restoration requires a net benefits economic framework. This dissertation, in three manuscripts, addresses three aspects necessary to implement this net benefits framework. The first manuscript used a dynamic analytical model to show that restoration should start at a high level and decline to take advantage of the natural maturity in wetland attributes. The model identifies needed information which is not currently available, including information on the maturity relationships between wetland attributes and wetland functions, the public's marginal values for wetland functions and the marginal costs of …


Youth At Risk For Alcohol Use And Smoking: A Longitudinal Examination Of Profiles Of Prevention, Andrea Eastwood Paiva Jan 2006

Youth At Risk For Alcohol Use And Smoking: A Longitudinal Examination Of Profiles Of Prevention, Andrea Eastwood Paiva

Open Access Dissertations

The current study was designed to examine the Profiles of Prevention among non-drinking and non-smoking adolescents. Research across age groups (elementary, middle and high school), populations (U.S., U.K., and Israel), and substances (tobacco, alcohol and other drugs) has consistently identified four profiles of non-users who vary in their risks for substance use: (1) Most Protected from substance use; (2) Most Tempted to use substances; (3) Most Negative about staying substance free; and (4) Least Positive about being substance free. These profiles have demonstrated both internal and external validity in cross-sectional data. This longitudinal research focuses on students who remain substance …


Particle Dynamics And Shelf-Basin Interactions In The Western Arctic Ocean Investigated Using Radiochemical Tracers, Kate Hagstrom Jan 2006

Particle Dynamics And Shelf-Basin Interactions In The Western Arctic Ocean Investigated Using Radiochemical Tracers, Kate Hagstrom

Open Access Dissertations

A fundamental question in Arctic carbon cycling is the extent to which particulate organic carbon produced over the shelves is exported to the slope and interior basins. In this dissertation, the particle-reactive radionuclides 234Th (t1/2 = 24.1 d), 228Th (t1/2 = 1.9 y), and 210Pb (t1/2 = 22.3 y) were used as tracers of particulate organic carbon (POC) export fluxes, rates of particle aggregation, and sediment focusing. Samples were collected as part of the Shelf-Basin Interactions (SBI) Phase II field program in the shelf-slope region of the Chukchi Sea along a series of shelf-basin transects during the spring and summer …


Self, Other And The Sociopolitical In Politically Active Women Survivors Of Domestic Violence, Molly Ann Hedrick Jan 2006

Self, Other And The Sociopolitical In Politically Active Women Survivors Of Domestic Violence, Molly Ann Hedrick

Open Access Dissertations

This research examined experiences with interpersonal, intrapersonal, and structural violence in politically active women survivors of domestic violence. This study also explored how (if at all) these women described processes which Freire (2003) called critical consciousness and liberating action, and what these women can tell us about the processes of change. Participants were 16 survivors of domestic violence recruited from Sisters Overcoming Abusive Relationships (SOAR) in Rhode Island. SOAR is an organization run entirely by survivors of domestic violence and provides political activism with the goal of ending domestic violence. I utilized a mixed-methods, transformative and social constructivist concurrent design. …


Functional Silane Based Polymers For Sensing And Separations, Aruna M. Velamakanni Jan 2006

Functional Silane Based Polymers For Sensing And Separations, Aruna M. Velamakanni

Open Access Dissertations

The work reported in this dissertation has focused primarily on two areas: Synthesis of functional silane based polymers and application of these polymers for separations and sensing. In the first part we reported on the design of a library of silane based copolymers synthesized with various side groups and substitutions on phenyl ring and their characterization using FTIR, UV, H1NMR, TGA and DSC. In the second part of this work, we describe the self-assembly of the above mentioned copolymers into multilayer onto various substrates, characterization of the materials on layered substrates and finally application of these polymers as sensors. The …


Dietary Restraint, Self-Efficacy, And Gender Differences In Weight Loss Program Participants, Amy Elizabeth Sheeley Jan 2005

Dietary Restraint, Self-Efficacy, And Gender Differences In Weight Loss Program Participants, Amy Elizabeth Sheeley

Open Access Dissertations

Rates of overweight and obesity continue to rise each year with serious associated health risks. This study was conducted to explore gender differences between behavior change variables for both dietary fat reduction and exercise behaviors in a weight loss population. This research also investigated relationships between these psychosocial behavior change variables. Over 300 overweight and obese men and women enrolled in weight loss programs in the greater Boston area completed self-administered surveys. The behavior change variables surveyed included validated Transtheoretical Model (TTM) measures of stage of change for dietary fat reduction, situational confidence and temptation for dietary fat reduction, as …


Functional And Structural Study Of The Protein Tyrosine Kinase Csk, As A Model System, Sungsoo Lee Jan 2005

Functional And Structural Study Of The Protein Tyrosine Kinase Csk, As A Model System, Sungsoo Lee

Open Access Dissertations

Protein phosphorylation, enzymatic transfer of γ-phosphate of adenosine triphosphate to a hydroxyl group of a recipient amino acid residue such as serine, threonine or tyrosine, is a fundamental control mechanism of cell signaling in eukaryotes. Most protein kinases, catalyzing protein phosphorylation, consist of multiple globular domains which play important roles in connecting signal transduction pathways. Due to their critical roles in cell signaling and the correlation between their activity and disease processes of the cell, many protein tyrosine kinases (PTKs) are targets for inhibitor development. For the purposes of understanding their mechanisms in signal transduction and developing PTK inhibitors for …


Probing The Regulatory Mechanisms Of Protein Tyrosine Kinases, Using C-Terminal Src Kinase (Csk) As A Model System, Xiaofeng Lin Jan 2005

Probing The Regulatory Mechanisms Of Protein Tyrosine Kinases, Using C-Terminal Src Kinase (Csk) As A Model System, Xiaofeng Lin

Open Access Dissertations

Protein tyrosine kinases (PTKs) are important signal transducers. Most PTKs have a catalytic domain, which carries out catalysis, and regulatory domains, which regulate their activity. Autophosphorylation, the Tyr phosphorylation in the activation loop, is also a key regulatory mechanism for most PTKs. In this study, I probed the regulatory mechanisms of PTKs using Csk as a model system. Csk has two regulatory domains, SH3 and SH2, and a catalytic domain. In this study, I probed how the regulatory domains modulate Csk activity. First, the regulatory domains were required for Csk full activity, yet not involved in the recognition of Src, …


Evolutionary Numerical Methods Applied To Minimum Weight Structural Design And Cardiac Mechanics, Arun Unnikrishnan Nair Jan 2005

Evolutionary Numerical Methods Applied To Minimum Weight Structural Design And Cardiac Mechanics, Arun Unnikrishnan Nair

Open Access Dissertations

In this thesis numerical methods combining evolutionary optimization algorithms and finite element analysis are developed and applied to problems in cardiac mechanics and structural optimization. In the first application finite element analysis is combined with a real encoded genetic algorithm to determine unknown material parameters in constitutive model for ventricular myocardium using an inverse approach. As a second application suppression of global instabilities in minimum-weight Michell structures is investigated. A real encoded genetic algorithm is combined with a finite element eigenvalue buckling analysis for suppressing global buckling associated with minimum-weight structures. A novel finite element based evolutionary algorithm is developed …


Sex Change In Crepidula Fornicata: Influence Of Environmental Factors On Reproductive Success And The Timing Of Sex Change, Dina A. Proestou Jan 2005

Sex Change In Crepidula Fornicata: Influence Of Environmental Factors On Reproductive Success And The Timing Of Sex Change, Dina A. Proestou

Open Access Dissertations

Many organisms experience a sex change at some point in their life cycle. In order for this life history strategy to be adaptive, lifetime reproductive success must be maximized. The size advantage hypothesis predicts a universal size at sex change for all individuals; however, for most species, size at sex change varies both across and within populations, indicating that the reproductive success of the first sex is influenced by external factors. The objective of this research was to investigate the influence of environmental variables on the sex, reproductive success, and timing of sex change of the protandrous sequential hermaphrodite, Crepidula …


Habitat Use By Waterfowl Wintering In Narragansett Bay, Rhode Island, Richard A. Mckinney Jan 2005

Habitat Use By Waterfowl Wintering In Narragansett Bay, Rhode Island, Richard A. Mckinney

Open Access Dissertations

Coastal areas near urban centers often provide waterfowl habitat, but little is known of the effects of human development on wintering waterfowl. We used energetic and modeling approaches to examine habitat use by wintering waterfowl along a gradient of human disturbance in an urban estuary in the northeast U.S. Using estimates of the energetic costs of thermoregulation and different behaviors, we developed a model to estimate daily energy expenditure (DEE) of wintering buffleheads (Bucephala albeola) at six sites in Narragansett Bay, RI. Bufflehead DEE ranged from 46.9-52.4 kJ/hr, and energetic costs of thermoregulation comprised as much as 28% of their …


The Role Of Planning In Marine Resource Management: The Effect Of Differing Legislative Mandates On The Atlantic Large Whale Take Reduction Plan, Shannon Olivia Marie Bettridge Jan 2005

The Role Of Planning In Marine Resource Management: The Effect Of Differing Legislative Mandates On The Atlantic Large Whale Take Reduction Plan, Shannon Olivia Marie Bettridge

Open Access Dissertations

Natural resource management laws mandate that Federal agencies must develop and implement plans to protect living and non-living resources. Occasionally these laws overlap in their jurisdiction of marine species, subjecting the resource in question to the requirements of more than one Federal statute. This dissertation examines the planning directives of three Federal resource laws: the National Environmental Policy Act of 1969, the Marine Mammal Protection Act of 1972, and the Endangered Species Act of 1973, to identify procedural and substantive conflicts between their mandates. In the U.S., Atlantic large whale protection comes under the purview of the three environmental statutes …


Native And Exotic Phragmites Australis In Rhode Island: Distribution And Differential Resistance To Insect Herbivores, Adam Matthew Lambert Jan 2005

Native And Exotic Phragmites Australis In Rhode Island: Distribution And Differential Resistance To Insect Herbivores, Adam Matthew Lambert

Open Access Dissertations

In this research, I studied an introduced strain of Phragmites australis (Cav.) Trin. Ex. Steudel that is displacing native P. australis in the United States and altering ecological processes of native environments. The purpose of this study was to determine the distribution of native and exotic P. australis in Rhode Island and determine if there is a difference in resistance to native and exotic insect herbivores among the various P. australis haplotypes. I also studied possible factors that may cause these differences. I conducted experiments using field surveys and field and laboratory insect feeding experiments. All exotic insects tested fed …


The Ecology Of Plant-Parasitic Nematodes And Their Antagonists On Golf Course Greens Turf In Southern New England, Katerina Serlemitsos Jordan Jan 2005

The Ecology Of Plant-Parasitic Nematodes And Their Antagonists On Golf Course Greens Turf In Southern New England, Katerina Serlemitsos Jordan

Open Access Dissertations

A two-year survey was conducted to determine the ecology of plant-parasitic nematodes and their antagonists on golf course greens turf in southern New England. Soil samples were collected from three greens each at 38 golf courses, for a total of 114 samples. Samples were collected in May, July, and September of each year. Nematodes were extracted from soil samples, identified to genus and counted. Genus diversity and seasonal fluctuation of nematode populations, both within each season and between the two sampling years, were analyzed. Additionally, data on soil physical and chemical properties, as well as management practices on each golf …


Obesity And Colorectal Cancer And The Knowledge, Attitudes, Beliefs And Behaviors Related To Colorectal Cancer Prevention Among Non-Hispanic Black Women In Rhode Island, Kathleen Mary Cullinen Jan 2005

Obesity And Colorectal Cancer And The Knowledge, Attitudes, Beliefs And Behaviors Related To Colorectal Cancer Prevention Among Non-Hispanic Black Women In Rhode Island, Kathleen Mary Cullinen

Open Access Dissertations

Obesity is an established risk factor for colorectal cancer (CRC). Numerous studies have linked diets low in fruits and vegetables and decreased physical activity, risk factors for obesity, with increased cancer risk. The purpose of this study was to evaluate the effect of obesity on CRC mortality; the behavioral, socioeconomic and demographic predictors of obesity; and the knowledge attitudes, beliefs and behaviors of a Rhode Island population identified at high risk for both obesity and CRC. The first study tested a model hypothesis that a diet low in fruits and vegetables, decreased physical activity, and obesity as defined by a …


The Relationship Between Articular Cartilage Damage And Lubricin Integrity Following Injury And In Inflammatory Arthritis, Khaled Ahmed Elsaid Jan 2005

The Relationship Between Articular Cartilage Damage And Lubricin Integrity Following Injury And In Inflammatory Arthritis, Khaled Ahmed Elsaid

Open Access Dissertations

The two major constituents of cartilage are collagen type II (CII) and aggrecan. Osteoarthritis (OA) and rheumatoid arthritis (RA) are characterized by irreversible damage to cartilage. Knee injury is recognized as a cause of secondary OA. Understanding the mechanism by which OA develops following injury can lead to emergence of intervention strategies to slow the progression of OA. Lubricin is a protein that is responsible for the lubrication of articular surfaces. The loss of lubricin can precipitate cartilage damage. This research aimed to investigate the role that proteolytic degradation of lubricin, following knee injury, plays in cartilage damage. The hypothesis …


Meanings In The Lives Of Older Adults: In Their Own Voices, Isabel A. Trombetti Jan 2005

Meanings In The Lives Of Older Adults: In Their Own Voices, Isabel A. Trombetti

Open Access Dissertations

This dissertation attempts to advance our understanding of how we as human beings perceive, judge, and evaluate our lives, particularly in the last stage of the life cycle. The primary goal was to counterbalance the predominantly quantitative approach to meaning in life with a qualitative approach by interviewing 21 older adults as they reflected on and attempted to find purpose and value in the totality of their experiences. This goal was explicit on the point of wanting older adults, those ideally positioned in the lifespan to inform us about meaning in life, to speak without the restriction associated with response …


Dissolved Oxygen Dynamics In A Shallow Stream System, Bjoern Michaelis Jan 2005

Dissolved Oxygen Dynamics In A Shallow Stream System, Bjoern Michaelis

Open Access Dissertations

Dissolved oxygen dynamics in a shallow stream system were analyzed under dry weather conditions on the Blackstone River in the state of Massachusetts. A dissolved oxygen modeling was conducted with the enhanced stream water quality EPA model QUAL2E by Brown and Barnwell (1987). The dissolved oxygen model was successfully calibrated and validated for dynamical simulations. The accuracy of the model results was proved by graphical and statistical comparison. A procedure is provided to simulate chlorophyll a in QUAL2E with higher accuracy, based on converted photosynthetically active radiation (PAR) and extinction coefficients of PAR in the water column. The significance of …


Restructuring School: Improving K-8 Science Teaching And Learning In Schools Through Systematic Professional Development, Diana Catalina Siliezar Jan 2005

Restructuring School: Improving K-8 Science Teaching And Learning In Schools Through Systematic Professional Development, Diana Catalina Siliezar

Open Access Dissertations

The purpose of the study is to examine the effectiveness that a systematic, content specific professional development program has on K-8 teachers' attitudes, content preparedness, pedagogy preparedness, teacher efficacy, and their knowledge of standards and classroom practice. The Northeastern LSC program in this study is a project that uses inquiry-based, hands-on science kits that have been designed to help K-8 students comprehend science content and processes that are outlined by the various science standards such as the National Science Education Standards (NSES, 2001). Teachers were stratified according to the number of professional development hours they encountered and the types of …


Hydrography, Suspended Sediments, Chlorophyll A, Chromophoric Dissolved Organic Matter And Optical Characteristics Of The Pearl River (Zhujiang) Estuary During July And November, 1998, Wendy Lynn Woods Jan 2005

Hydrography, Suspended Sediments, Chlorophyll A, Chromophoric Dissolved Organic Matter And Optical Characteristics Of The Pearl River (Zhujiang) Estuary During July And November, 1998, Wendy Lynn Woods

Open Access Dissertations

The Pearl River (Zhujiang) is the second largest river in China and the largest in southern China, with a strongly seasonal discharge driven by Asian monsoon rainfall patterns. Optical characteristics of the plume region are expected to strongly affect light limitation of primary production and the interpretation of satellite remote sensing data. The river is enriched with nutrients from agriculture, aquaculture, and human waste disposal, and experiences frequent phytoplankton blooms. An understanding of factors controlling phytoplankton primary production is currently lacking, but is essential for effective water quality management. This study reports on the hydrography (temperature, salinity, dissolved oxygen, pH, …