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Mechanical Properties Of Hoof Horn, Sole Haemorrhage And Lameness In Dairy Cattle, Betina Winkler Jan 2005

Mechanical Properties Of Hoof Horn, Sole Haemorrhage And Lameness In Dairy Cattle, Betina Winkler

School of Biological and Marine Sciences Theses

The present study aimed to develop a method to measure changes in the mechanical properties of the sole and white line hoof horn that should be used in vivo and to examine the hypothesis that the presence of haemorrhages in the horn would represent a weakening of the structural strength of the horn. Hoof horn samples were collected from the sole and white line areas of the hoof horn of dairy cattle. The maximum punch force, work to fracture, elastic modulus and membrane stress were measured through the use of a punch test and the elastic modulus was measured through …


The Role Of Biological Interactions In Modifying The Effects Of Climate Change On Intertidal Assemblages, Phillipa Jane Moore Jan 2005

The Role Of Biological Interactions In Modifying The Effects Of Climate Change On Intertidal Assemblages, Phillipa Jane Moore

School of Biological and Marine Sciences Theses

The geographic distribution of most species is expected to alter as a consequence of global climate change. Predictions for the extent of these range shifts are frequently based on anticipated changes in temperature using a 'climate envelope' approach, which oversimplifies predictions because it does not consider interactions with other physical and biological factors. The aim of this thesis was to investigate how biological interactions modulate species responses to climate change. On many rocky shores in the NE Atlantic the interaction between limpets, barnacles and canopy forming macroalgae have an important role in structuring rocky shore communities. In particular, limpets control …


Phytoplankton Responses As Indicators Of Exposure To Toxicants, Rosangela Aparecida Devilla Jan 2005

Phytoplankton Responses As Indicators Of Exposure To Toxicants, Rosangela Aparecida Devilla

School of Biological and Marine Sciences Theses

The use of antifouling booster biocides on boats and ships is of environmental concern as the leached products can affect non-target, highly susceptible phytoplanktonic organisms. Appropriate assessment of whether or not estuarine/marine phytoplankton are potentially at risk should include a combination of approaches, investigating toxic effects for both single species and natural phytoplankton communities and ideally include field verifications. This research addresses the application and comparison of methods to investigate toxic responses to four antifouling biocides Irgarol 1051®, diuron, Sea-Nine 211® and zinc pyrithione in laboratory-based experiments with single species and using natural phytoplankton assemblages. The applicability of photosynthetic parameters …


The Use Of Prebiotics To Improve Fish Health, Michelle Stone Jan 2005

The Use Of Prebiotics To Improve Fish Health, Michelle Stone

School of Biological and Marine Sciences Theses

The aim of this project was to analyse critically the potential use of prebiotics in aquaculture. Initially, the intestinal microflora of rainbow trout, raised in the aquarium facilities at CEFAS, Weymouth, was investigated using both conventional bacteriological (culture, BiOLOG) and molecular (Restriction Fragment Length Polymorphism (RFLP), 16S rRNA gene sequencing) techniques. Dominant colony types were identified as Aeromonas sobria, Carnobacterium piscicola and Clostridium gasigenes. A series of in vitro growth curve studies was carried out using a selection of intestinal bacteria and known fish pathogens, to determine the ability of intestinal bacteria to utilise the potential prebiotic candidates inulin, lactulose …


Changes In The Biogeographic Distribution Of The Trochid Gastropods Osilinus Lineatus (Da Costa) And Gibbula Umbilicalis (Da Costa) In Response To Global Climate Change: Range Dynamics And Physiological Mechanisms, Nova Mieszkowska Jan 2005

Changes In The Biogeographic Distribution Of The Trochid Gastropods Osilinus Lineatus (Da Costa) And Gibbula Umbilicalis (Da Costa) In Response To Global Climate Change: Range Dynamics And Physiological Mechanisms, Nova Mieszkowska

School of Biological and Marine Sciences Theses

There is an urgent need to understand the effects of climatic variability on species' distributions. This thesis uses an integrative approach to identify and explain the changes in geographical distribution of two rocky intertidal, warm water species of trochid gastropod, Osilinus lineatus (da Costa) and Gibbula umbiiicalis (da Costa) that have occurred since the onset of rapid climate warming in the mid-1980s. The potential physiological mechanisms causing the range shifts are examined, and the effects on population dynamics quantified. I resurveyed sites in Britain and northern France previously surveyed by Southward & Crisp (1950s), Hawthorne (1960s) and Kendall, Williamson & …


Determination Of Planktonic Primary Production Parameters In The Atlantic Ocean Using In Situ Inherent Optical Properties, Christopher David Lowe Jan 2005

Determination Of Planktonic Primary Production Parameters In The Atlantic Ocean Using In Situ Inherent Optical Properties, Christopher David Lowe

School of Biological and Marine Sciences Theses

Bio-optical measurements from three of the Atlantic Meridional Transect programme cruises in 2003-2004 were examined to determine spatial variation and correlations between phytoplankton variables. These cruises each crossed approximately 100° of latitude between the UK and the Falkland Islands, covering a range of environments in the Atlantic Ocean. Measurements of primary production were made using a Fast Repetition Rate Fluorometer (FRRF), concentration of phytoplankton pigments using High Performance Liquid Clrromatography (HPLC) and in situ particle absorption using a novel double cast technique with an ac9+ nine wavelength absorption/attenuation meter. Ancillary data in the form of salinity, temperature and chlorophyll concentration …


Molecular Resolution Of Marine Nematodes For Improved Assessment Of Biodiversity, Punyasloke Bhadury Jan 2005

Molecular Resolution Of Marine Nematodes For Improved Assessment Of Biodiversity, Punyasloke Bhadury

School of Biological and Marine Sciences Theses

Free-living nematodes are abundant in all marine habitats, highly diverse and can be important ecological indicators for monitoring anthropogenic impacts on the environment. Despite such attributes, nematode diagnostics has traditionally relied on detailed comparison of morphological characters which is often difficult and laborious, and as a result there is an increasing 'black hole' in faunal inventories where the biodiversity of groups such as nematodes is typically underestimated. Molecular methods offer a potentially efficient alternative approach to studying the biodiversity of marine nematode communities, and the main focus of this thesis was to apply molecular ecological tools for improved understanding of …


Effect Of Human Disturbance On The Foraging Behaviour Of The Oystercatcher Haematopus Ostralegus On The Rocky Shore, Sarah Carless Jan 2005

Effect Of Human Disturbance On The Foraging Behaviour Of The Oystercatcher Haematopus Ostralegus On The Rocky Shore, Sarah Carless

School of Biological and Marine Sciences Theses

The aim of this thesis was to investigate the effects of human disturbance on animal foraging behaviour using oystercatchers foraging on the rocky shore as a model system. The primary focus of this thesis was the balance between vigilance and foraging, and the variation in this balance with changes in environmental factors and the application of experimentally controlled human disturbance. On the structurally complex rocky shore foraging and vigilance are generally mutually exclusive behaviours and so an individual must trade-off energy acquisition with predator avoidance. The extent of the trade-off was expected to vary spatially and temporally dependant upon an …


Ammonia Emissions From Slurry Applications To Land, Thomas Henry Misselbrook Jan 2005

Ammonia Emissions From Slurry Applications To Land, Thomas Henry Misselbrook

School of Biological and Marine Sciences Theses

Over the last 10-15 years there has been increasing concern within Europe as to the effects of ammonia emission and subsequent deposition to sensitive ecosystems, causing eutrophication and soil acidification. Transboundary transport of emissions has led to legislation at EC level with member states being given emission ceiling targets. Research has therefore aimed at quantifying national emissions, modelling emission processes and developing mitigation strategies. Agriculture accounts for >80% of total UK ammonia emission, therefore an accurate and robust model is required to estimate emissions from this sector. National inventory methodology has improved as the database of emission measurements and survey …


The Effects Of Idea Elaboration On Unconscious Plagiarism, Louisa-Jayne Stark Jan 2005

The Effects Of Idea Elaboration On Unconscious Plagiarism, Louisa-Jayne Stark

School of Psychology Theses

Rates of unconscious plagiarism were investigated using Brown and Murphy's 3-stage paradigm. Initially, participants completed the creative Alternate Uses Test (generation phase) and then at test, recalled their original ideas (recall-own phase) and generated new ideas (generate-new phase). In both of the testing phases, participants plagiarised by reporting someone else's ideas as either their own idea or a new idea. Plagiarism rates increased over a one week retention interval (Experiment 2) and both active and passive participants were equally likely to plagiarise someone else's idea as a new idea (Experiment 1). When an elaboration phase was incorporated into the paradigm, …


Landscapes Of Ephemeral Embrace : A Painter's Exploration Of Immersive Virtual Space As A Medium For Transforming Perception, Charlotte Adele Davies Jan 2005

Landscapes Of Ephemeral Embrace : A Painter's Exploration Of Immersive Virtual Space As A Medium For Transforming Perception, Charlotte Adele Davies

School of Engineering, Computing and Mathematics Theses

The following text has been written to illuminate the research embodied In Ephemere, a fullyimmersive virtual environment which integrates stereoscopic 3D computer-generated images and spatialized 3D sound, with a user interface based on breathing, balance, and gaze. This artwork was begun when I entered the doctoral program at CAiNA (Centre of Advanced Inquiry Into the Interactive Arts) in 1997, and was completed in 1998. The work Ephemere is grounded in a very personal vision, developed over more than 25 years of artistic practice, including, most significantly, painting. Ephemere follows on its predecessor Osmose, and as such, Is a continuation of …


Predicting Leadership And Performance In Uniformed Organisations Using The Five Factor Model Of Personality, Christopher John James Allender Jan 2005

Predicting Leadership And Performance In Uniformed Organisations Using The Five Factor Model Of Personality, Christopher John James Allender

School of Psychology Theses

Selection has been primarily focussed on the use of ability and aptitude measures as they have been shown to predict job performance in uniformed organisations. Personality assessment has largely been ignored as a possible contributor to improving predictions of performance. The emergence of the Five Factor Model as a framework for personality research, together with the development of the Trait Self Description Inventory (TSDI), has provided the opportunity to investigate how personality assessment might improve upon existing selection methods to predict performance in training. It was found that existing criterion measures did not fully reflect the core aims of the …


Re-Examining Scholarship: Exploring The Meanings Of Boyer's Dimensions To The Professoriate, Julia Craig Laker Jan 2005

Re-Examining Scholarship: Exploring The Meanings Of Boyer's Dimensions To The Professoriate, Julia Craig Laker

Plymouth Institute of Education Theses

Since Boyer's (1990) seminal publication on scholarship there has been a steadily expanding body of knowledge concerned with reviewing the priorities of the professoriate in higher education (HE). This dissertation enters that discourse by exploring HE educators' perceptions of Boyer's (1990) multiple dimensions of scholarship. It also accepts the challenge offered by Schon (1996) that examination of the new dimensions of scholarship requires a new epistemology by designing and employing a spiral methodology. This twofold task forms the basis of this dissertation. This investigation is contextually located in an education department in a large university in the United States of …


A Multiscale Investigation Into The Effects Of Agriculture On Flood Hydrology In Southwest England, Amy Louise Sullivan Jan 2005

A Multiscale Investigation Into The Effects Of Agriculture On Flood Hydrology In Southwest England, Amy Louise Sullivan

School of Geography, Earth and Environmental Sciences Theses

In the UK, perceived increases ih high impact flood events over the last decade and broad scale recognition of the enhanced flood risks associated with future climate change predictions, have reinforced the need for improved understanding and management of processes governing peak flow responses. This thesis investigates the effects of agricultural land uses on the hydrology of rural areas at a range of spatial and temporal scales. At the catchment scale, 48 catchments and subcatchments distributed across the south western counties of Cornwall, Devon, Somerset and Dorset were investigated. A suite of multivariate statistical techniques, including Direct (Redundancy Analysis) and …


Mesoscale Circulation In The Black Sea : A Study Combining Numerical Modelling And Observations, Cecilia Elizabeth Enriquez Ortiz Jan 2005

Mesoscale Circulation In The Black Sea : A Study Combining Numerical Modelling And Observations, Cecilia Elizabeth Enriquez Ortiz

School of Geography, Earth and Environmental Sciences Theses

Mesoscale dynamics play a major role in the general circulation throughout the ocean. Mesoscale eddies promote the exchange of material and physical properties between different areas of the ocean such as continental shelves and the deep seas. Despite the increasing number of studies on mesoscale processes, there are further important questions unanswered concerning the origin and evolution of eddies, the mechanisms enhancing mesoscale activity and the detachment of eddies from the coast. The present research contributes to the understanding of the mesoscale circulation in the Black Sea basin by combining hydrodynamic numerical modelling with observational data analysis. Within this research: …


Medium-Term (Months To Years) Morphodynamic Modelling Of A Complex Estuarine System, Marcos Eduardo Cordeiro Bernardes Jan 2005

Medium-Term (Months To Years) Morphodynamic Modelling Of A Complex Estuarine System, Marcos Eduardo Cordeiro Bernardes

School of Geography, Earth and Environmental Sciences Theses

This contribution focuses on the medium-term (months to years) morphodynamic modelling of natural estuaries. A 2D morphodynamic model based on the Telemac system was calibrated and validated using extensive field measurements' at Teignmouth (UK). Statistical tools indicate that the model is capable of predicting the observed hydrodynamics with 'good' accuracy, given that measurement noise is removed. Despite some qualitative agreement, morphological predictions show a more limited skill; consistent with the current 'state of the art' in this area of scientific research. The typical long simulation times associated with process-based morphodynamic models are optimised through the successful implementation of an input …


A Study Of Mediterranean Bluefin Tuna (Thunnus Thynnus L.) With Reference To Stock Identification And Management Strategies, Andreina Fenech Farrugia Jan 2005

A Study Of Mediterranean Bluefin Tuna (Thunnus Thynnus L.) With Reference To Stock Identification And Management Strategies, Andreina Fenech Farrugia

School of Geography, Earth and Environmental Sciences Theses

The management of bluefin tuna (Thunnus thynnus) in the north Atlantic has been based on the assumption that there are two separate stocks (an eastern Atlantic stock, including the Mediterranean Sea and a western Atlantic stock). This hypothesis has never been scientifically confirmed. This study provides evidence of unique stock characteristics of the bluefin tuna population targeted specifically in the Mediterranean and aims at showing that it is a single stock suitable for its own management regime. This has been done through the study of the biological parameters of bluefin tunas sampled in the Mediterranean, including biometric relationships, age determination, …


Determination Of Dissolved Iron Speciation In The North East Atlantic Ocean By Flow Injection Chemiluminescence, Simon Ussher Jan 2005

Determination Of Dissolved Iron Speciation In The North East Atlantic Ocean By Flow Injection Chemiluminescence, Simon Ussher

School of Geography, Earth and Environmental Sciences Theses

The knowledge of iron biogeochemistry is constrained by paucity in the understanding of its uptake, transport and the partitioning of the element between different phases, redox states and coordination sites. The work presented in this thesis describes the optimisation and evaluation of a Flow Injection Chemiluminescence (FICL) method for the shipboard determination of dissolved Fe(II) species (< 0.2 µm) in seawater. This includes results from two ship-board trials and a study of the effects of model ligands on iron redox speciation measurements in natural waters. The method was also used to determine the distribution of dissolved iron species (< 0.2 µm) in two contrasting study areas in the North East Atlantic Ocean and for a study of aerosol iron dissolution in seawater. The FI-CL method was evaluated and was found to be robust and sensitive, to have low limits o f detection (5-12 pM) and short analysis times 3 min) suitable for the high resolution spatial and temporal sampling required for shipboard analysis of Fe(II). A study of the effects of model ligands on Fe(II) determination revealed no conclusive evidence for significant interference from organic molecules on the method but Fe(III) in the presence of certain organic molecules had the potential to cause positive and negative interference in aqueous samples. Field survey results obtained for a transect between the Bay of Biscay to the coast of the Netherlands, showed enrichment of dissolved iron (0.7 - 2 nM) on the European continental shelf in March 2002. Near the shelf break, the iron enriched shelf waters were separated from low iron open ocean surface waters (0.15 - 0.4 nM) by a well-defined mixing gradient. Elevated dissolved Fe(II) concentrations (> 100 pM) were observed at the shelf break and during a solar radiation maximum in the coastal waters of the southern North Sea. These features were attributed to the dissolution of Fe(II) from anoxic sediments and photoreduction of iron from dissolved and suspended …


Environmentally Friendly Technology: The Behaviour Of Natural And Synthetic Binder Systems Within Paper Coatings, Giuliano Laudone Jan 2005

Environmentally Friendly Technology: The Behaviour Of Natural And Synthetic Binder Systems Within Paper Coatings, Giuliano Laudone

School of Geography, Earth and Environmental Sciences Theses

Coating shrinkage upon drying is a phenomenon well known to the paper coating industry, where it often causes changes in the final structure of the coating layer leading to poor results in terms of gloss, light scattering, surface strength, coverage, uniformity and printability. Such shrinkage has in previous studies been wrongly associated with shrinkage of the polymeric binders used in the coating formulation, by making erroneous comparison with solvent-based paint systems. Natural binders, as starch or proteins, which come from renewable resources and are therefore environmentally friendly, suffer more from this shrinkage phenomenon than synthetic binders. The aim of this …


Modelling The Water Quality Of The Patos Lagoon, Brazil, Deborah Ann Tyrrell Jan 2005

Modelling The Water Quality Of The Patos Lagoon, Brazil, Deborah Ann Tyrrell

School of Geography, Earth and Environmental Sciences Theses

A two-dimensional depth integrated finite element modelling suite comprising the flow model TELEN4AC-2D and the water quality model WQFLOW-2D has been calibrated to simulate the physics and chemistry of the Patos Lagoon and Estuary system in southern Brazil for the investigation of nutrients, primary production and faecal bacteria. The model has been evaluated for use as a predictive tool to aid the decision making process for the rehabilitation and management of the shallow embayment of Saco da Mangueira adjacent to the city of Rio Grande in the lower Patos Estuary. This bay is one of several shallow areas bordering the …


Nursing Research In The National Health Service: Activity, Strategies And Organisational Models, Valerie Anne Woodward Jan 2005

Nursing Research In The National Health Service: Activity, Strategies And Organisational Models, Valerie Anne Woodward

School of Nursing and Midwifery Theses

In this study, nursing research activity and support for this within the English National Health Service (NHS) were examined. The study was carried out in two phases. The first phase involved. working with one acute NHS trust to identify nursing research activity in the trust and to develop its nursing research strategy. The second involved working with five NHS trusts to explore nursing research activity and analyse support for nursing research within these organisations. The professional, educational and policy-related issues that set the context for the study were examined. The literature review for Phase 1 highlighted the fact that there …


The Dynamics Of A Tidal Intrusion Front In A Natural Estuary: Effects On Multibeam Sonar Accuracy, Richard Holman Collingwood Thain Jan 2005

The Dynamics Of A Tidal Intrusion Front In A Natural Estuary: Effects On Multibeam Sonar Accuracy, Richard Holman Collingwood Thain

School of Geography, Earth and Environmental Sciences Theses

This research has utilised high-resolution measurements of density and velocity to investigate the formation of a transient tidal intrusion front in a narrow, macrotidal estuary, and model the impact of such a frontal system on the accuracy of multibeam sonar surveys. The front was found to form during spring tides, when the barotropic inflow was sufficient to arrest the buoyant outflow from the estuary. This has been shown to be driven by changes in channel width and depth, creating a hydraulic control point. These changes in topography are demonstrated to interact with the flow m a similar manner to theoretical …


Development Of A Non-Invasive Electrophysiological System For Measuring The Auditory Capability Of Marine Animals, Jonathan Murray Lovell Jan 2005

Development Of A Non-Invasive Electrophysiological System For Measuring The Auditory Capability Of Marine Animals, Jonathan Murray Lovell

School of Geography, Earth and Environmental Sciences Theses

The following work describes the development and application of a neurological system to definitively profile the auditory responses of aquatic animals, presented as audiograms showing hearing threshold verses sound frequency. The accuracy of such information is essential for the optimisation of bio-technical devices such as the Acoustic Fish Deterrent (AFD) barrier deployed in the Illinois River to prevent the migration of non-indigenous Asian carp into Lake Michigan, and in the impact assessment of anthropogenic underwater sounds on the hearing of cetaceans and other marine animals. The ensuing Auditory Brainstem Response (ABR) electrophysiological recording technique developed at the University of Plymouth …


Analysis Of Pharmaceuticals And Biomolecules Using Hplc Coupled To Icp-Ms And Esi-Ms, Andrew James Cartwright Jan 2005

Analysis Of Pharmaceuticals And Biomolecules Using Hplc Coupled To Icp-Ms And Esi-Ms, Andrew James Cartwright

School of Geography, Earth and Environmental Sciences Theses

The work described within this thesis explores the use of HPLC coupled with ICPMS and ESI-MS in order to develop novel methods which overcome specific analytical challenges in the pharmaceutical industry. A membrane desolvation interface has been evaluated for coupling high performance liquid chromatography (HPLC) with inductively coupled plasma mass spectrometry (ICP-MS). Desolvation of the sample prior to reaching the plasma was shown to facilitate a versatile coupling of the two instrumental techniques, enabling chromatographic eluents containing up to 100 % organic to be used. This interface also allowed gradient elution to be used with ICP-MS. Tris(2,4,6-trimethoxyphenyl)phosphonium propylamine bromide (TMPP) …


Techniques For Studying The Biogeochemistry Of Nutrients In The Tamar Catchment, Utra Mankasingh Jan 2005

Techniques For Studying The Biogeochemistry Of Nutrients In The Tamar Catchment, Utra Mankasingh

School of Geography, Earth and Environmental Sciences Theses

Chapter One describes nitrogen and phosphorus species in the aquatic environment, their role in eutrophication, current legislation relevant to nutrient water quality and catchment management and the role of predictive modelling of nutrient export with respect to the management of river catchments. It also summarises analytical techniques for the determination of nitrogen and phosphorus species in natural waters and the use of generic ecotoxicological assays to link nutrient water quality and organism health. Data integrity is essential to biogeochemical studies that inform scientific research and environmental management. Reliable, accurate data permit valid conclusions to be drawn. The quality assurance and …


Use Of Depth Perception For The Improved Understanding Of Hydrographic Data, Runar Ostnes Jan 2005

Use Of Depth Perception For The Improved Understanding Of Hydrographic Data, Runar Ostnes

School of Geography, Earth and Environmental Sciences Theses

This thesis has reviewed how increased depth perception can be used to increase the understanding of hydrographic data First visual cues and various visual displays and techniques were investigated. From this investigation 3D stereoscopic techniques prove to be superior in improving the depth perception and understanding of spatially related data and a further investigation on current 3D stereoscopic visualisation techniques was carried out. After reviewing how hydrographic data is currently visualised it was decided that the chromo stereoscopic visualisation technique is preferred to be used for further research on selected hydrographic data models. A novel chromo stereoscopic application was developed …


Maltese Fisheries And The Sustainability Of Resources Around The Maltese Islands, Matthew Camilleri Jan 2005

Maltese Fisheries And The Sustainability Of Resources Around The Maltese Islands, Matthew Camilleri

School of Geography, Earth and Environmental Sciences Theses

Despite the socio-cultural importance of Maltese fisheries, a very limited number of studies and reports on the industry have been published, and scientific studies on the interaction between the Maltese fishing fleet and the fisheries resources exploited have never been carried out. Data collection schemes to monitor Maltese fisheries were also found to be extremely limited, however, this study has analysed the information arising from recently initiated data collection programmes, coordinated by the author, related to the fleet, its activities and the resources exploited; these programmes were namely a fishing fleet census, catch and effort sampling schemes and trawl surveys. …


The Tectonic Evolution Of The Hatay Ophiolite Of Southeast Turkey, Jennifer Inwood Jan 2005

The Tectonic Evolution Of The Hatay Ophiolite Of Southeast Turkey, Jennifer Inwood

School of Geography, Earth and Environmental Sciences Theses

A combination of palaeomagnetic and structural analyses have been used to constrain rotations in the Hatay (Kizildag) ophiolite of southeast Turkey in the eastern Mediterranean region and to produce a tectonic model for its evolution. The ophiolite comprises part of a prominent chain of southern Neotethyan ophiolites that stretches from the Troodos ophiolite of Cyprus eastwards to the Semail ophiolite of Oman. The Hatay ophiolite and the related Baer-Bassit ophiolite of Syria comprise the most westerly ophiolites emplaced onto the Arabian platform in the Maastrichtian. The palaeomagnetic analyses demonstrate that a large coherent anticlockwise rotation was experienced by the Hatay …


Small Island Developing States, Sustainability And The Caribbean Sea, Asha Singh Jan 2005

Small Island Developing States, Sustainability And The Caribbean Sea, Asha Singh

School of Geography, Earth and Environmental Sciences Theses

This study encompasses twenty-seven SIDS and the Caribbean Sea. In order to detennine the pressure on the sea from anthropogenic activities both terrestrial and marine, four major components were investigated. These are (a) how land use activities on the islands are affecting the Sea (b) the effects of coastal and marine based activities on this marine area (c) the influences of natural events on the Caribbean Sea and the SIDS (d) how the region is responding to minimise the pressures on the sea via policies and programmes. In the first component, the DPSIR in combination with GIS was applied to …


Phosphorus Speciation In Soil Leachate Using Field-Flow Fractionation And Flow Injection Analysis, Laura Jane Gimbert Jan 2005

Phosphorus Speciation In Soil Leachate Using Field-Flow Fractionation And Flow Injection Analysis, Laura Jane Gimbert

School of Geography, Earth and Environmental Sciences Theses

Colloidal material (0.001 - 1 um) in soil leachate and agricultural drainage waters is an important route for the transport of contaminants such as phosphorus from land to catchments. Excessive phosphorus concentrations can result in eutrophication of natural waters. To be able to characterise the colloidal material, in terms of size distribution, a mild and relatively new separation technique field-flow fractionation (FFF) can be used to fractionate complex colloidal samples. By combining FFF and flow injection analysis (FIA) more detailed physico-chemical information on phosphorus species in soil leachates and agricultural runoff waters can be obtained. Chapter 1 describes the methods …