Dissertations / Theses on the topic 'Aquatic centres'
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1
涂康年 and Hong-nin Stanley Tho. "An aquatic leisure centre." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1997. http://hub.hku.hk/bib/B31983649.
2
Tho, Hong-nin Stanley. "An aquatic leisure centre." Hong Kong : University of Hong Kong, 1997. http://sunzi.lib.hku.hk/hkuto/record.jsp?B2595376x.
3
謝啓倫 and Kai-lun Alan Tse. "Aquatic leisure & training centre at Stanley." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1999. http://hub.hku.hk/bib/B31984848.
4
Tse, Kai-lun Alan. "Aquatic leisure & training centre at Stanley." Hong Kong : University of Hong Kong, 1999. http://sunzi.lib.hku.hk/hkuto/record.jsp?B2594809x.
5
Liang, Yan-keung. "Indoor aqua sports centre." Hong Kong : University of Hong Kong, 1994. http://sunzi.lib.hku.hk/hkuto/record.jsp?B25945075.
6
Chan, Yiu-lun Tony. "Aquatic sports resort at the Former High Island Detention Centre." Click to view the E-thesis via HKUTO, 2004. http://sunzi.lib.hku.hk/hkuto/record/B3198700X.
7
Barbier, Antoine. "Analyse de la complexité institutionnelle de la collaboration public-privé au sein des projets d'équipements ludo-sportifs : le cas des concessions de travaux de centres aquatiques français." Electronic Thesis or Diss., Normandie, 2024. http://www.theses.fr/2024NORMR003.
Abstract:
En France, 83% du parc d’équipements sportifs appartient aux collectivités qui doivent en financer le renouvellement et l’adaptation à de nouvelles pratiques ludiques et hygiéniques, dans un contexte de contrainte budgétaire croissante. En conséquence, elles ont développé des collaborations avec le secteur privé qui ont récemment pris la forme des concessions de travaux, permettant de déléguer à un groupement d’entreprises privées une mission globale (financement, conception, construction et exploitation-maintenance). Cette forme de contractualisation redéfinit le positionnement et les stratégies des différents acteurs au sein des projets d’équipements sportifs. Dès lors, la problématique de cette thèse consiste à analyser les modalités de collaboration public-privé dans le cadre de projets de concession de travaux d’équipements sportifs. Cette question sera en particulier étudiée dans le cadre des projets de concession de centres aquatiques, à partir du concept de logiques institutionnelles (Thornton et al., 2012). Pour cela, cinq projets de centres aquatiques français ont été investigués à partir de 31 entretiens semi-directifs complétés par un corpus documentaire pour chaque cas (n = 378).Ce travail met en avant le besoin de compétences spécifiques sur les projets, dont la gestion doit s’inscrire dans une démarche plus large de management de projet. Les résultats permettent également de questionner la notion de risque économique ainsi que la place du service public au sein de ces équipements hybrides (Richet et al., 2009), tout en relativisant l’efficience permise par la globalisation des missions au sein d’un même contratIn France, 83% of sports facilities are owned by local authorities, which must finance their renovation and adaptation to new leisure and health practices, in a context of growing budget constraints. As a result, they have developed collaborations with the private sector, which have recently taken the form of works concessions, whereby a consortium of private companies is delegated a global mission (financing, design, construction and operation-maintenance). This form of contractualisation redefines positions and strategies for the stakeholders involved in sports facilities projects. The aim of this thesis is therefore to analyse public-private collaboration in the context of sports facilities concession projects. This issue will be studied in particular in the context of aquatic centres concession projects, based on the concept of institutional logics (Thornton et al., 2012). Five French aquatic centre projects were investigated based on 31 semi-structured interviews supplemented by a corpus of documents for each case (n = 378).This research highlights the need for specific project skills, which must be managed as part of a broader project management approach. The results also raise questions about the notion of economic risk and the place of public service within these hybrid facilities (Richet et al., 2009), while putting into perspective the efficiency allowed by the globalisation of missions within a single contract
8
Chan, Yiu-lun Tony, and 陳銚倫. "Aquatic sports resort at the Former High Island Detention Centre." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B3198700X.
9
梁人強 and Yan-keung Liang. "Indoor aqua sports centre." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1994. http://hub.hku.hk/bib/B31982104.
10
Cook, Nicholas Alexander. "Surface Water Quality and Aquatic Ecological Health in Central Appalachian Streams." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/56603.
Abstract:
The Central Appalachian region is home to several resource-extraction industries, a host of globally unique aquatic wildlife species, and region-wide poverty. These overlapping circumstances make solving environmental issues in the region challenging. Of particular focus is the coal mining industry, both because of its prevalence and because of controversial methods of practice such as mountain top mining. One of the primary concerns in the region is the extirpation of sensitive aquatic macroinvertebrate species. Several studies have suggested the primary driver of this loss of biodiversity is due to increased conductivity in streams impacted by these mining practices. The reality is that several pollutant sources coexist in these Central Appalachian watersheds. Because of geographic isolation, many headwater communities lack proper sewerage and discharge directly into nearby waterways, compounding potential effects of upstream mining activities. Additionally, several legacy sites exist throughout the Appalachian region, both underground and surface mining in nature. To best mitigate ecological impacts of all of these pollutant types, relative contributions of each must be understood, as well as the nature of the pollution contributed by each.
As a contribution towards this region-wide need for better information on pollution, the studies comprising this dissertation seek to better understand the composition of these different pollutant sources and their in-stream contributions to conductivity. The first paper found that these sources are indeed distinct in their inorganic ion make-up: surface coal mining was found to contribute primarily Ca, K, Ni, Se, and SO₄⁻², while untreated household waste (UHW) was primarily associated with P. HCO₃⁻ Mn, and Si were found to be associated with a legacy underground discharge. The second and third scientific studies included here analyzed conductivity's effect on Virginia Stream Condition Index (VSCI) versus other water quality and habitat parameters as well as the effect of specific ion suites on VSCI score. Findings indicated that excellent habitat extends species resilience against elevated conductivity, with passing VSCI scores found at conductivity in the 600-800 µs/cm range in cases of excellent habitat metric scores. Meanwhile, VSCI score suppression was highly related to surface mining-related inorganic ions (Ca, K, Mg, Ni, and SO₄⁻²), but also negatively correlated with ions related to UHW (P and Na). These results indicate the need for quantification of biological responses to specific ions in order to initiate targeted mitigate of pollutants in Central Appalachian watersheds.Ph. D.
11
Janse, van Rensburg Philippus Jacobus. "Investigating the feasibility of an indoor aquatic centre for the Nelson Mandela Bay Metropole." Thesis, Nelson Mandela Metropolitan University, 2007. http://hdl.handle.net/10948/791.
Abstract:
The purpose of this study was to investigate the feasibility of an Indoor Aquatic Centre for the Nelson Mandela Bay Metropole. The main problem was to establish the minimum aquatic facilities an Indoor Aquatic Centre must have, to be able to host National and International aquatic events. The sub problems identified to address the main problem were as follows: - Should accommodation be available at the Indoor Aquatic Centre? - Should medical facilities be available at the Indoor Aquatic Centre? - Should there be a gymnasium at the Indoor Aquatic Centre? - Should there be food malls available at the Indoor Aquatic Centre? - Will sports tourism in the Nelson Mandela Bay Metropole benefit from an Indoor Aquatic Centre? In this study the researcher discusses current tourism opportunities, possible sports tourism opportunities and the current aquatic facilities the Nelson Mandela Bay Metropole has to offer. From the discussion regarding these issues it was found that the metropole do offer many attraction opportunities including the following: - Adventure and Sport; - Agriculture; - Arts and Culture; - Business and Conferencing; - Coastal and Beaches; - Entertainment and Shopping; - Historical; - Wild Life and Nature. Adventure and Sport attractions contribute to sports tourism in the metropole and an Indoor Aquatic Centre could enable the metropole to improve sports tourism figures to the metropole. Sports tourism is defined as any tourism that is linked with a sports event. The conclusion can be made that the main initiative for sports tourism is to host a major sporting event to attract tourists. Adding other tourist attractions makes the destination more attractive. It is also important that the community is educated and informed about sports tourism so that the tourist and the community benefits from the event. Indoor Aquatic Centres found in countries like Australia, Canada, Europe, Russia, The Far East, United Kingdom and the United States of America, were discussed to identify the minimum requirements for an Indoor Aquatic Centre. The literature study has shown that the Indoor Aquatic Centre should be a multi purpose centre with a minimum of two heated pools and leisure facilities included. This will enable the centre to generate different streams of income to enhance sustainability. The aquatic centre should also be designed to host National and International events, but not necessarily for Olympic Games events. An empirical study was done to see if the respondents agree on the minimum requirements for an Indoor Aquatic Centre, identified by the literature study and if they agree that sports tourism within the Nelson Mandela Bay Metropole will benefit from an Indoor Aquatic Centre. The conclusion of the empirical study is that the respondents’ view correlate with the information found during the literature study regarding the minimum requirements for an Indoor Aquatic Centre listed as follows: - The minimum number of heated pools are two consisting of a fifty metre ten lane pool and a twenty five metre ten lane pool; - A food mall that consists of a restaurant, fast food stalls and a food store; - Medical facilities, conference facilities, gymnasium and other leisure facilities must also be available; - Accommodation facilities must be available and consists of two and three bedroom fully serviced apartments; - The Indoor Aquatic centre must be able to have seating for 2000 people and parking for 1000 vehicles. The study has addressed the main problem and the sub problems, but further research needs to be conducted regarding the funding of the Indoor Aquatic Centre as this issue was not successfully addressed. More information is needed regarding the different ways of funding and who the stakeholders should be in this process.
12
Barriault, Chantal Lise. "Visitor engagement and learning behaviour in science centres, zoos and aquaria." Thesis, Curtin University, 2014. http://hdl.handle.net/20.500.11937/541.
Abstract:
The purpose of this research was to devise an assessment tool to effectively capture the nature of visitors' learning experiences with live animal exhibits in zoos and aquaria. A comprehensive learning framework was developed and field-tested with a total of 900 visitor. The resulting framework provides researchers and practitioners in zoos and aquaria with a valuable tool to assess the learning impact of exhibits through observable behavioural indicators.
13
Bornhoeft, Sarah C. "Influence of Experimental Sheet Flow on Aquatic Foods Webs of the Central Everglades." FIU Digital Commons, 2016. http://digitalcommons.fiu.edu/etd/2562.
Abstract:
Establishing historical water velocities is a goal of Everglades restoration because of their role maintaining landscape topographic relief. However, flows may also change the trophic state of marshes by phosphorus loading. I used fatty acid (FA) and stoichiometric data to quantify how increased sheet flow altered the relative heterotrophic and autotrophic contributions to aquatic consumers in a field experiment that introduced flowing water to an Everglades marsh in November, 2014. Algal taxonomic composition was different between pre-flow and flow sampling, marked by increases in the nutrient exploiting Mougeotia species (green algae) during flow sampling. Dietary tracer FAs in consumers reflected changes in algal resources, including an increase in green algae-derived and a decrease in bacteria-derived FAs. These food web responses indicate that establishing historic water velocity in degraded wetlands can shift the origins of organic matter from a more detrital to more algal supported web.
14
Bailey, Michael J. "Relationships among aquatic insects, hydroperiods, and wetland functional plant groups in Central Ohio /." The Ohio State University, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=osu1486400446371124.
15
Smith, JoEtta Kaye. "Selection and Use of Aquatic Vegetation by Migratory Waterfowl in North Central Texas." Thesis, University of North Texas, 2001. https://digital.library.unt.edu/ark:/67531/metadc2779/.
Abstract:
Assessment of aquatic plant selection by waterfowl has been conducted during the winters of 1997-2000 on 49 0.2-0.79 ha research ponds in north central Texas. Ponds were categorized by dominant plant species into eight habitat types. Census with waterfowl species identification were performed to investigate impacts of aquatic vegetation and water depth on waterfowl. Eighteen waterfowl species were observed. Peak migration occurred in late December/early January. Mixed native ponds and mixed native/hydrilla ponds were the most frequently selected habitat types. The study included correlation analysis between pond water levels and waterfowl use. Full ponds received greatest use followed by half full ponds, while almost empty ponds received minimal use. Time activity budgets were conducted on waterfowl utilizing mixed native and hydrilla ponds to compare waterfowl time partitioning on native aquatic vegetation versus hydrilla. Although only minor differences were found in time budgets, social status appears to be strongly related to habitat selection. Ducks on native ponds were paired (86%), conversely no ducks on hydrilla ponds were paired. Hydrilla pond although frequently utilized, were populated by lower status birds mostly single hens.
16
Jayawardana, Chandamali University of Ballarat. "Littoral macroinverterbrates in relation to native and exotic riparian vegetation in streams of central Victoria, Australia." University of Ballarat, 2006. http://archimedes.ballarat.edu.au:8080/vital/access/HandleResolver/1959.17/12773.
Abstract:
"Exotic willows (Salix spp.) are widespread riparian tree species of streams in temperate Australian and New Zealand. In Australian willow speicies are declared weeds of national significance, yet little is known about the novel habitats they create not the impact on aquatic biota of vegetation change following willow management programs ..." [leaf i]Doctor of Philosophy
17
Jayawardana, Chandamali. "Littoral macroinverterbrates in relation to native and exotic riparian vegetation in streams of central Victoria, Australia." University of Ballarat, 2006. http://archimedes.ballarat.edu.au:8080/vital/access/HandleResolver/1959.17/14610.
Abstract:
"Exotic willows (Salix spp.) are widespread riparian tree species of streams in temperate Australian and New Zealand. In Australian willow speicies are declared weeds of national significance, yet little is known about the novel habitats they create not the impact on aquatic biota of vegetation change following willow management programs ..." [leaf i]Doctor of Philosophy
18
Jayawardana, Chandamali. "Littoral macroinvertebrates in relation to native and exotic riparian vegetation in streams of central Victoria, Australia." Thesis, University of Ballarat, 2006. http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/65724.
Abstract:
"Exotic willows (Salix spp.) are widespread riparian tree species of streams in temperate Australian and New Zealand. In Australian willow species are declared weeds of national significance, yet little is known about the novel habitats they create not the impact on aquatic biota of vegetation change following willow management programs ..." [leaf i]Doctor of Philosophy
19
Sonnenberg, Rob. "Development of aquatic communities in high-altitude mine pit lake systems of west-central Alberta." Thesis, Lethbridge, Alta. : University of Lethbridge, Dept. of Geography, 2011, 2011. http://hdl.handle.net/10133/3106.
Abstract:
Reclamation on the Cardinal River and Gregg River coal mines includes the construction of mine pit lakes connected to stream environments. Key physical, chemical and biological parameters of these “truck and shovel” lakes and their streams were investigated, and hypotheses regarding ecosystems and populations were tested. Findings include:
Sphinx Lake and Pit Lake CD exhibit meromictic (partial-mixing) tendencies, but
still function in a similar fashion to shallower, natural sub-alpine lakes.
Elevated selenium concentrations as high as 16 ug/g (dry weight) were recorded
in Rainbow trout (Oncorhynchus mykiss) eggs taken from gravid Sphinx Lake and
Pit Lake CD fish. Potential detrimental effects associated with the
bioaccumulation of selenium on fish reproduction were not observed.
Stream water temperatures downstream of Sphinx Lake and Pit Lake CD were
significantly warmer than in inlet streams and streams without pit lakes.
Streambed concretions caused by calcite precipitation were documented and
found to affect portions of the upper Gregg River basin. Remediation of this
concretion is important for sustainability of trout populations.
Aquatic communities including fish, invertebrates, zooplankton and aquatic plants
are present in these pit lake systems. Athabasca Rainbow trout populations are
self-propagating (spawning at the outlets) with higher densities downstream than
there were prior to lake reclamation.
The development of sub-alpine mine-pit lakes connected to the stream environment
appears to be an appropriate and beneficial reclamation technique in this area.xvi, 224 leaves : col. ill., map ; 28 cm
20
Byrne, Patrick. "Contaminant hydrogeochemistry and aquatic ecosystem health at abandoned metal mines : the Afon Twymyn, central Wales." Thesis, Loughborough University, 2009. https://dspace.lboro.ac.uk/2134/6174.
Abstract:
Following the decline of the UK metal mining industry by the 1920s, over 3,000 abandoned metal mines exist in England and Wales. Contaminated drainage from this historical industry causes approximately 20% of all water quality failures in England and Wales. In this thesis, a holistic geographical approach, incorporating aspects of hydrology, hydrogeochemistry and freshwater ecology, is employed to investigate the hydrological, sedimentological and ecological impacts of the abandoned Dylife lead/zinc mine on the Afon Twymyn (central Wales). Examination of river sediment quality highlights the need for measurements of the quality of this component of the river ecosystem and, in particular, measurement of bioavailable as opposed to total metals. The majority of heavy metals in bed sediments of the Afon Twymyn exist in highly mobile geochemical phases, potentially posing serious threats to ecological integrity. Significant metal flushing occurred during flood events at Dylife mine and a distinct seasonal pattern was observed with greater levels of flushing occurring during flood events in the summer months. It is suggested that investigations of contaminant/ecosystem relations and potential remediation strategies should include high-resolution temporal sampling of river water chemistry under conditions of flood flow. Paradoxically, a range of biological indices failed to identify significant negative impacts of metal mine contaminants on macroinvertebrate communities, suggesting there is little contamination of the river ecosystem. However, Canonical Correspondence Analysis did identify significant differences in community structure between polluted and unpolluted river stretches, suggesting that standard unimetric biological indices might only be successful in identifying impacts at the most severely polluted mine sites. It is suggested that the ecological approach of the European Union Water Framework Directive to the assessment of river ecosystem status may not yield an accurate representation of contamination in rivers such as the Afon Twymyn where contamination by mining is moderate, circum-neutral and the mining operation is long abandoned.
21
Gross, Lee M. "Long-term assessment of predatory fish removal on a pond-breeding amphibian community in central Illinois /." View online, 2009. http://repository.eiu.edu/theses/docs/32211131565136.pdf.
22
Zhang, Yiding. "Predicting River Aquatic Productivity and Dissolved Oxygen before and after Dam Removal in Central Ohio, USA." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1337983076.
23
Lucas, Rikki. "Characterizing water quality and hydrologic properties of urban streams in central Virginia." VCU Scholars Compass, 2019. https://scholarscompass.vcu.edu/etd/5709.
Abstract:
The objective of this study was to characterize water quality and hydrologic properties of urban streams in the Richmond metropolitan area. Water quality data were analyzed for six urban sites and two non-urban sites. Geomorphological surveys and conservative tracer studies were performed at four urban sites and one non-urban site to describe intra- and inter- site variability in transient storage, channel geomorphology, and related hydrologic parameters. Urban sites showed elevated concentrations of nitrogen and more variable TSS concentrations relative to reference sites. Urban channels were deeply incised with unstable banks and low sinuosity. Little Westham Creek exhibited the greatest transient storage. This site was characterized by large, deep pools and therefore it is likely that transient storage was associated with surface water storage. Transient storage was low at all other sites, particularly for the study reach at Reedy Creek, which flowed through a concrete channel. Lowest transient storage was observed at this site in spring, though higher values were measured in summer corresponding to the presence of biofilms, A lower, more naturalized section of the concrete channel was found to have greater transient storage suggesting the possibility of passive restoration of concrete channels in urban environments. This study documents variability in the structure and function of urban streams. Restoration projects should work to improve impairments that are specific to each site at both the reach and watershed scale to maximize the efficacy of restoration.
24
Mailand, William A. "Comparison of Gastropod Assemblages from Natural and Phosphate Mine Lakes of Central Florida." Scholar Commons, 2015. http://scholarcommons.usf.edu/etd/5830.
Abstract:
Investigations were made examining the relationships between gastropod species richness and abundance across 20 phosphate and 20 natural lakes in Central Florida. In additional to lake category, age of phosphate lakes was used to determine if phosphate lakes ever approximate natural lakes. Additional physical, chemical, and biological parameters, including chlorophyll a, Ca, secchi, phosphorous, conductance, fish predation, and recreational lake use were investigated in order to determine if they affected gastropods with lake age. Comparisons were also made between gastropod species richness and average abundance and two groups of dominant vegetation categories: Panicum, a structurally complex macrophyte, and Typha, a less structurally complex macrophyte.
After phosphate mining operations are completed, Florida state regulations require the establishment of ecologically viable habitat (created lakes) which reflects the properties of regional natural lakes including vegetation structure, littoral zone, bank slope, and lake depth. The littoral zone is part of the mandated structure of the lake, and is of considerable importance to the uptake, storage, transformation and release of nutrients. Within the littoral zone, gastropods are a critical link in the food web with implications for the long term structure and function of a lake. They are known for their close associations with macrophytes and are common environmental indicators since they have limited mobility, high diversity, are well studied, are representative of their habitat type and have a widespread geographic range. They are also an important food sources for many predators in aquatic environments, include migratory waterfowl and game fish.
Gastropod species richness and abundance data were collected via standard net sweep methodology. Abundance was presented in catch per unit effort, therefore all abundance data were averages. Initial comparisons between gastropod species richness and average abundance yielded no significant differences between natural and phosphate lakes. However, when age was applied as a covariate, there was a significant difference between lake age as a continuous variable in species richness comparisons. Additionally, categorical comparisons between lakes older or younger than 30 years indicated significantly higher species richness and average abundance of gastropods in lakes phosphate lakes older than 30 years.
Physical and chemical properties of the lakes did not appear to influence gastropod populations between lakes of different ages. Fish predation interactions did not indicate any significant influence either. However, the presence of boat ramps did indicate a positive relationship between average gastropod abundance and species richness and recreational lake use.
Littoral zone macrophyte comparisons between dominant vegetation Typha and Panicum indicated a significantly positive relationship between gastropod species richness and average abundance in older phosphate lakes dominated by the more structurally complex Panicum macrophytes. Confidence in the Typha and Panicum results was confounded by lack of access to younger, Typha dominated, phosphate lakes. An increase in sample size for younger Typha lakes, with additional site access, may further support these findings.
25
Burk, Rosemary A. "Ecology and Recolonization of Benthic Macroinvertebrates in a Groundwater-dependent Stream in North Central Texas During a Supra-seasonal Drought." Thesis, University of North Texas, 2012. https://digital.library.unt.edu/ark:/67531/metadc115054/.
Abstract:
Extreme climatic events such as droughts are known to eliminate aquatic biota and alter community structure and function. Perennial headwater springs provide important drought refugia to benthic macroinvertebrates and an important source of colonists via drift or aerial adults to intermittent streams post-drought. During a supra-seasonal drought in North-central Texas summer and fall 2006, benthic macroinvertebrates from persistent groundwater-dependent macrohabitats of varying hydrological connectivity and riparian shading were studied: perennial riffles, connected pools, shaded disconnected pools, and full sun disconnected pools. Riffles were a distinct habitat with significantly higher taxa richness, proportion of lotic taxa, diversity and evenness than other macrohabitats. Macrohabitats were found to be important refugia for 106 benthic macroinvertebrates and 4 microcrustacean taxa. Throughout the extreme drought, perennially flowing habitats were refugia to 19 taxa (17.9% total taxa) not collected in disconnected pools. Shaded disconnected pools contained lotic taxa not previously known to be able to complete their lifecycles in lentic habitats, emphasizing the importance of groundwater effluent and shading. With the resumption of flow at a downstream intermittent site of Ash Creek in mid-October 2006, an annual recolonization study was conducted comparing the perennial headwaters’ benthic macroinvertebrate taxa richness, densities and community ecology with the downstream intermittent site. The headwaters supported higher mean taxa richness than the intermittent site over the duration of the study (ANOVA P < 0.001). However, the unexpected result of overall decreasing taxa richness at the perennial headwater site from August 2006 to April 2008 appears to reflect lag effects of the supra-seasonal drought combined with effects of multiple spates of 2007, which are factors confounding the point of recovery for taxa richness. Recovery of taxa richness at the intermittent site took 9 months compared to 1 to 2 months reported in other arid and semi-arid streams in the United States recovering from seasonal drying and floods. Sustainable use of groundwater resources and conservation of riparian corridors is vital to protecting groundwater-dependent ecosystems that play a vital role in maintaining regional biodiversity by serving as biotic refugia during catastrophic disturbance.
26
Timpano, Anthony Joseph. "Levels of Dissolved Solids Associated with Aquatic Life Effects in Headwater Streams of Virginia's Central Appalachian Coalfield Region." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/41884.
Abstract:
Benthic macroinvertebrate communities in headwater streams influenced by Appalachian coal mining often differ from communities in minimally distrubed streams. Total dissolved solids (TDS) associated with mining have been suggested as stressors to these communities. In studies of such streams conducted to date, both non-TDS stressors and elevated TDS have been present as potential influences on biota. Here the association between dissolved salts and benthic macroinvertebrate community structure was examined using a family-level multimetric index and genus-level taxa sensitivity distributions. Test sites were selected along a gradient of elevated TDS, with non-TDS factors of reference quality. Virginia Stream Condition Index (VASCI) scores were regressed against log-transformed measures of TDS, specific conductance, and sulfate (SO42-) using ordinary least squares and quantile regression techniques. Biological effects, as defined by VASCI scores indicating stressed or severely stressed conditions, were observed with increasing probability from 0% at â ¤ 190 mg/L TDS to 100% at â ¥ 1,108 mg/L TDS, with 50% probability of effects observed at 422 mg/L TDS. Associations between water quality measures and biological condition were variable, with approximately 48% of the variance explained by TDS. Genus-level analysis using a field sensitivity distribution approach indicated 95% of reference genera were observed at sites with TDS â ¤ 281 mg/L, and 80% of genera were observed at sites with TDS â ¤ 411 mg/L. This is evidence that TDS, specific conductance, or SO42- can be used to establish dissolved solids levels for streams influenced by Appalachian coal mining above which aquatic life effects are increasingly probable.Master of Science
27
Timpano, Anthony J. "Levels of Dissolved Solids Associated with Aquatic Life Effects in Headwater Streams of Virginia's Central Appalachian Coalfield Region." Thesis, Virginia Tech, 2011. http://hdl.handle.net/10919/41884.
Abstract:
Benthic macroinvertebrate communities in headwater streams influenced by Appalachian coal mining often differ from communities in minimally distrubed streams. Total dissolved solids (TDS) associated with mining have been suggested as stressors to these communities. In studies of such streams conducted to date, both non-TDS stressors and elevated TDS have been present as potential influences on biota. Here the association between dissolved salts and benthic macroinvertebrate community structure was examined using a family-level multimetric index and genus-level taxa sensitivity distributions. Test sites were selected along a gradient of elevated TDS, with non-TDS factors of reference quality. Virginia Stream Condition Index (VASCI) scores were regressed against log-transformed measures of TDS, specific conductance, and sulfate (SO42-) using ordinary least squares and quantile regression techniques. Biological effects, as defined by VASCI scores indicating stressed or severely stressed conditions, were observed with increasing probability from 0% at â ¤ 190 mg/L TDS to 100% at â ¥ 1,108 mg/L TDS, with 50% probability of effects observed at 422 mg/L TDS. Associations between water quality measures and biological condition were variable, with approximately 48% of the variance explained by TDS. Genus-level analysis using a field sensitivity distribution approach indicated 95% of reference genera were observed at sites with TDS â ¤ 281 mg/L, and 80% of genera were observed at sites with TDS â ¤ 411 mg/L. This is evidence that TDS, specific conductance, or SO42- can be used to establish dissolved solids levels for streams influenced by Appalachian coal mining above which aquatic life effects are increasingly probable.Master of Science
28
Dugas, Brian G. "Spatial, Seasonal, and Size-Dependent Variation in the Diet of Sacramento Pikeminnow in the Main Stem of Chorro Creek, Central Coast California." DigitalCommons@CalPoly, 2009. https://digitalcommons.calpoly.edu/theses/94.
Abstract:
This study examined the diet composition of ninety-nine Sacramento pikeminnow (150-410 mm [5.9-16 in] fork length [FL]) collected from the upper and lower main stem of Chorro Creek, Morro Bay Watershed, California in 2006. The goal of this study was to characterize the spatial and seasonal variability in the diet of Sacramento pikeminnow within Chorro Creek and to determine what proportion of the diet is represented by rainbow trout (Oncorhynchus mykiss) and their anadromous form (steelhead). Prey was identified in 88% of the samples collected in the early season and 84% of the samples collected in the late season. Fish and/or scales were identified in 12% of the samples collected. Sacramento pikeminnow consumed a wide variety of prey; the diversity of individual diets was higher in the lower main stem than the upper. Overall, diet diversity increased with Sacramento pikeminnow length. In both the early and late season, crayfish formed the largest part of the diet of large Sacramento pikeminnow (>250 mm [9.8 in]). There was a slight increase in the proportion of fish in the diet during the late season, and tendency for cannibalism which was primarily observed in the upper main stem of Chorro Creek. In summary, the overall results of this study support the conclusion that Sacramento pikeminnow are not significant predators of O. mykiss in natural stream conditions. However, conclusions about the ability of Sacramento pikeminnow in Chorro Creek to reduce O. mykiss populations will require further information on the prey selection of Sacramento pikeminnow when juvenile O. mykiss and adult pikeminnow are abundant.
29
Deyle, Anna C. "Population Genetics of Amphiuma means and Siren lacertina in Central Florida." Scholar Commons, 2011. http://scholarcommons.usf.edu/etd/3071.
Abstract:
Population structure can be defined as a difference in the frequencies of alleles among populations, and it is often caused by barriers to dispersal. I used mitochondrial DNA sequences to examine the population structure of two large, aquatic salamanders, Amphiuma means (the Two-Toed Amphiuma) and Siren lacertina (the Greater Siren), at two spatial scales in peninsular Florida. Both species appear to have similar life histories, including poor dry land dispersal capabilities, and I hypothesized that they would exhibit significant population structure at both broad and fine scales. Wetland loss and landscape fragmentation are certain to have caused decreases in abundance and even extirpation of local populations of both species. Understanding current levels of genetic diversity is important in conservation efforts, particularly if individuals must be translocated in the future.
A portion of the cytochrome b gene was analyzed for 34 Amphiuma means and 21 Siren lacertina sequences. A neighbor-joining tree and haplotype network showed that A. means exhibited statistically significant population structure at the broad, but not the fine scale. The lack of structure at the fine scale was attributed to periodic flooding among drainage basins in the low-lying study area. The same analyses showed that S. lacertina did not exhibit statistically significant population structure at the broad scale (analyses were not conducted at the fine scale because of low sample size). The difference in broad-scale population structure between the two species is the result of a difference in gene flow, which in turn, can be the result of a difference in effective population size (Ne), female dispersal capability and/or behavior, chance of bait-bucket transfer, or biogeographic history. The best of these possible explanations seems to be a difference in biogeographic history. For the two sites from which both species were sampled, estimated population divergence date was 3.3-6.4 million years ago (mya) for A. means and 0.04-0.5 mya for S. lacertina. The large difference in estimated divergence dates suggests that S. lacertina colonized peninsular Florida from somewhere else following a glacial sea level rise or an interglacial sea level fall, at a time when A. means was already present in refugia within peninsular Florida. This is the first study to explicitly examine the population genetics of A. means and S. lacertina, and future studies should examine their population genetics range wide, to elucidate how gene flow and/or historical biogeography may have contributed to population structure elsewhere.
30
Boaz, Lindsey E. "Influences of fluvial geomorphology on aquatic-to-terrestrial Hg transport: evidence from protected and urban streams of central Ohio, USA." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1420822467.
31
Mazão, Gustavo Rincon. "A complexidade do substrato e o mesohabitat (remanso e corredeira) são farores que influenciam a fauna de Chironomidae (Diptera) em riachos do Brasil Central?" Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/59/59131/tde-24082009-084058/.
Abstract:
O presente trabalho teve o objetivo testar os efeitos da complexidade do substrato e do tipo de mesohabitat (remanso e corredeira) sobre a riqueza, a abundância e a composição de Chironomidae (Diptera) em riachos. O experimento foi realizado em 12 riachos do Brasil Central, onde em cada mesohabitat (remanso e corredeira) foram colocadas duas bandejas de plástico, uma contendo substrato com alta complexidade e outra contendo substrato com baixa complexidade. Estes substratos permaneceram no riacho durante 20 dias. Os efeitos da complexidade do substrato e dos mesohabitats não foram significativos nem sobre a riqueza padronizada nem sobre a abundância, por outro lado, o efeito do mesohabitat foi significativo sobre a composição faunística. O primeiro eixo da DCA (33% da variabilidade) separou claramente a fauna de remansos da de corredeiras. A análise de espécies indicadoras mostrou que Chironomus sp., Ablabesmyia sp.1, Ablabesmyia sp.2, Djalmabatista sp., Fittkauimyia sp., Labrundinia sp. indicaram o remanso, e Paratendipes sp., Polypedilum sp.2, Pentaneura sp., Rheotanytarsus sp.1, Corynoneura sp.2, Cricotopus sp.2, Lopescladius sp., Nanocladius sp.2, Parametriocnemus sp. e Thienemanniella sp. indicaram a corredeira.The present study had the aim to test the effects of the substrate complexity and of the mesohabitat (pools and riffles) on the richness, abundance and composition of Chironomidae (Diptera) in streams. The experiment took place in 12 streams of Central Brazil. In each stream, two plastic trays were put in each one of the two studied mesohabitats (pool and riffle), one with higher complexity substrate and one with lower complexity substrate. These substrates were kept in the streams for 20 days. The effects of substrate complexity and of mesohabitat were not significative neither on the standarized richness nor on the abundance. On the other hand, the effect of mesohabitat was significative on the faunistic composition. The first axis of DCA (33% of variability) separated cleanly the fauna in pools from those in riffles. The indicator species analysis showed that Chironomus sp., Ablabesmyia sp.1, Ablabesmyia sp.2, Djalmabatista sp., Fittkauimyia sp., Labrundinia sp. indicated pools, and Paratendipes sp., Polypedilum sp.2, Pentaneura sp., Rheotanytarsus sp.1, Corynoneura sp.2, Cricotopus sp.2, Lopescladius sp., Nanocladius sp.2, Parametriocnemus sp. and Thienemanniella sp. indicated riffles.
32
Murphy, Mason Owen. "POPULATION GENETIC STRUCTURE OF NECTURUS MACULOSUS IN CENTRAL AND EASTERN KENTUCKY." UKnowledge, 2016. http://uknowledge.uky.edu/biology_etds/33.
Abstract:
Population structure is influenced by extrinsic factors, such as landscape architecture and dispersal barriers. Lotic network architecture is known to constrain ecological, demographic and evolutionary processes, including population genetic structure. I assessed the population structure of a widespread aquatic salamander, Necturus maculosus, across three river basins in central and eastern Kentucky. I examined the role of network architecture, anthropogenic barriers, and spatial scale on patterns of population structure. I also provided a review of N. maculosus capture methods and offer an improved trap design. I identified significant structuring between the combined Licking/Kinniconick basin and the Kentucky River basin, with further structure within each basin. I found evidence for both hierarchically organized populations structure (e.g. Stream Hierarchy Model), as well as population structure unaffected by network hierarchy (e.g. Death Valley Model). These results highlight the importance of scale when examining population structure. Whereas one model may suffice to explain population structure at a local scale, a second model may be necessary to accurately describe the population structure across larger spatial scales. These results suggest that local factors affect population structure uniquely across a species’ range, and support a multi-model approach for assessing population structure.
33
Salvarrey, Andrea Vanessa Batalla. "DISTRIBUIÇÃO ESPACIAL DE MACROINVERTEBRADOS BENTÔNICOS EM RIACHOS DA REGIÃO CENTRAL DO RIO GRANDE DO SUL, BRASIL." Universidade Federal de Santa Maria, 2010. http://repositorio.ufsm.br/handle/1/5276.
Abstract:
Coordenação de Aperfeiçoamento de Pessoal de Nível SuperiorThe knowledge of the role of physical and biological processes on animal community distribution is influenced by the spatial scale adopted in ecological studies. Due the scarcity of studies of distributional patterns of benthic macroinvertebrates in multiple scales in tropical and subtropical regions, this paper analyzes the structure of benthic macroinvertebrate communities in different spatial scales (among small watersheds and different river orders of each watershed) and the influence of certain environmental variables on these communities. The sampling was performed with Surber sampler in the small watersheds of the Vacacaí-Mirim River (August, 2008), and the Ibicuí-Mirim and Tororaipí rivers (August 2009). In each watershed were selected four sampling sites following the longitudinal gradient (stretches of 1st, 2nd, 3th and 4th orders. The environmental factors analyzed were: water temperature, pH, electrical conductivity, dissolved oxygen, substrate granulometry and presence of aquatic and riparian vegetation. A total of 10.985 individuals, 42 families and 129 taxa were collected and, in general, the dominant taxa were Simuliidae (14%), Naididae (13%), Cricotopus sp. 1 (13%), Cricotopus sp. 2 (8%) (Chironomidae), Paragripopteryx (5%) (Gripopterygidae) and Americabaetis (5%) (Baetidae) representing 58% of the total specimens collected. There were no differences in macroinvertebrate richness among watersheds, however, the community structure showed differences among the three watersheds. The stretches of 3th and 4th orders showed higher richness than the stretches of 1st and 2nd orders. Additionally, there was recorded difference among communities structure of different orders stretches (56%). In general the environmental variables that influenced the distribution of the communities were granulometry, dissolved oxygen, electrical conductivity and aquatic vegetation. The macroinvertebrates characteristic of 1st and 2nd order stretches of the Vacacaí-Mirim River and of 1st order of the Tororaipí River watersheds where influenced mainly by bigger granulometry and dissolved oxygen, while the macroinvertebrates associated to the 3th and 4th order stretches were influenced by the higher electrical conductivity. The small watersheds of the Ibicuí-Mirim (except the 2nd order stretch) and Tororaipí rivers (except the 1st and 4th order stretches) did not show difference concerning the river orders, and were associated to the smaller electrical conductivity and absence of aquatic vegetation. The 4th order stretches of the Tororaipí River was segregated of the other stretches due to its smaller granulometry. The granulometry did not influence the small watershed of the Ibicuí-Mirim and Tororaipí rivers (except the 4th order stretches) due to the presence of fine substrate, while the Vacacaí-Mirim River watershed showed coarse substrate. This difference is probably determined by the fact that the Vacacaí-Mirim River represents a tributary of a different and bigger hydrographic watershed, the Jacuí River Basin, while the others small watersheds represents tributaries of the Ibicuí River Basin. Possibly, the Jacuí River Basin have higher electrical conductvity, since this factor was high in all the sampled stretches, being encreased by the proximity to urban areas with domestic sewage and agricultural activities near the river banks. In the small watersheds of the Ibicuí-Mirim and Tororaipí rivers, the difference between the community structures is possibly related to environmental features, such as finer substrate in both rivers and well developed riparian vegetation in the Tororaipí River.
As percepções dos processos físicos e biológicos dependem da escala em que as observações são feitas. Devido à escassez de estudos sobre os padrões de distribuição de macroinvertebrados bentônicos em múltiplas escalas em regiões tropicais e subtropicais, o objetivo deste estudo foi analisar a estruturação das comunidades de macroinvertebrados bentônicos em diferentes escalas espaciais (entre microbacias e entre trechos de diferentes ordens de cada riacho) e identificar a influência de variáveis ambientais sobre a estruturação dessas comunidades. A amostragem foi realizada com amostrador tipo Surber, nas microbacias dos rios Vacacaí-Mirim (agosto de 2008), Ibicuí-Mirim e Tororaipí (agosto de 2009). Em cada microbacia foram selecionados quatro pontos de coleta segundo gradiente longitudinal (trechos de 1ª, 2ª, 3ª e 4ª ordens). Em cada ponto de coleta foram amostradas as variáveis ambientais: temperatura da água, pH, condutividade elétrica, oxigênio dissolvido, granulometria do substrato e presença de vegetação aquática e ripária. Um total de 10.985 indivíduos, 42 famílias e 129 táxons foram coletados, sendo que os táxons dominantes foram Simuliidae (14%), Naididae (13%), Cricotopus sp. 1 (13%), Cricotopus sp. 2 (8%) (Chironomidae) e Paragripopteryx (5%) (Gripopterygidae) e Americabaetis (5%) (Baetidae), perfazendo 58% da abundância total. Não houve diferença na riqueza entre as microbacias, entretanto ocorreu diferença na estrutura das comunidades das três microbacias. As microbacias dos rios Tororaipí e Ibicuí-Mirim apresentaram menor diferença entre si, que em relação à microbacia do Rio Vacacaí-Mirim. Os trechos de 3ª e 4ª ordens apresentaram maior riqueza que os trechos de 1ª e 2ª ordens. Adicionalmente, ocorreu diferença na estrutura das comunidades entre os trechos amostrados (56%), sendo que apenas os trechos de 2ª e 3ª ordens não apresentaram diferença significativa entre si. De modo geral, as variáveis ambientais que influenciaram a distribuição da comunidade foram a granulometria, a concentração de oxigênio dissolvido, a condutividade elétrica e a vegetação aquática. Os macroinvertebrados típicos dos trechos de 1ª e 2ª ordens da microbacia do Rio Vacacaí-Mirim e de 1ª ordem do Rio Tororaipí foram influenciados principalmente pela maior granulometria e concentração de oxigênio dissolvido, enquanto os associados aos trechos de 3ª e 4ª ordens foram influenciados pela maior condutividade elétrica. As microbacias dos rios Ibicuí-Mirim (exceto o trecho de 2ª ordem) e Tororaipí (exceto os trechos de 1ª e 4ª ordens) não apresentaram diferença quanto às ordens, sendo associadas à menor condutividade elétrica e à ausência de vegetação aquática. A granulometria não influenciou a diferenciação das microbacias dos rios Ibicuí-Mirim e Tororaipí (exceto o trecho de 4ª ordem), pois ambos possuem substrato mais fino, enquanto a microbacia do Rio Vacacaí-Mirim apresenta substrato pedregoso. Isto provavelmente se deve ao fato do Rio Vacacaí-Mirim pertencer a uma bacia hidrográfica diferente (Bacia do Rio Jacuí) das demais microbacias (Bacia do Rio Ibicuí). Possivelmente a maior condutividade elétrica seja típica da primeira Bacia, visto que esta foi maior em todos os trechos amostrados, sendo aumentada ainda pela proximidade da área urbana, com despejo de efluentes domésticos, assim como pela presença de agricultura próxima às margens. Nas microbacias dos rios Ibicuí-Mirim e Tororaipí a diferenciação da estrutura da comunidade encontrada deve ocorrer devido às características ambientais, como presença de substrato mais fino em ambos os rios e maior quantidade de vegetação ripária no Rio Tororaipí
34
Mitraki, Chrysoula. "Ontogeny and Littoral Structure of Lakes Created on Phosphate Mined Lands of Central Florida." Scholar Commons, 2012. http://scholarcommons.usf.edu/etd/4167.
Abstract:
Created lakes are an end product of phosphate mining in Florida. Beginning in 1975, Florida reclamation rules set criteria for phosphate created lakes aiming to approximate the structure of natural lakes, and emphasizing extensive littoral zones with both emergent and submersed vegetation.
Lake development relative to lake age and design were examined for 22 phosphate lakes representing a 40-year age trajectory, utilizing water quality and benthic invertebrate communities from littoral and deep-water locations (Chapter 1). The relative importance of morphometry and lake age in the development of littoral plant communities was examined using multiple vegetation surveys throughout the year, in a separate investigation of 39 littoral locations from 13 lakes reflecting age and morphometry gradients (Chapter 2). The same littoral locations were used to investigate benthic community composition in relation to emergent and submersed plant habitats (depth of 0.5 m and 1.5 m respectively), water quality, sediment characteristics, morphometry and lake age (Chapter 3).
Phosphate lakes >5.5m deep are warm monomictic water bodies, stratifying from April to October/November, and developing thermoclines at approximately 4 m. Shallow lakes (<5.5 m deep) are polymictic. Phosphate lakes become eutrophic or hypertrophic immediately after creation and remain so through time. Unlike reservoirs, they do not go through a trophic surge, which is an initial period of great productivity that declines as sediment nutrient storage is exhausted. Among the 22 sampled lakes, epilimnetic physical and chemical water quality variables (Secchi depth, chlorophyll a, turbidity, pH) did not differ along the age trajectory. Only specific conductance declined significantly, 10-20 years after lake creation, most probably due to bank stabilization. All water quality variables were within the range of natural lakes in the region, and were most similar to urban rather than suburban or rural natural lakes.
Benthic invertebrate abundance (total, Chironomidae, Oligochaeta, invertebrates other than Chironomidae and Oligochaeta) and taxa richness displayed great variability with lake age and did not differ among decadal lake groups at any depths examined (1 m, deepest point). Invertebrate abundance did not differ between littoral and deep habitats, except for lakes >10 years old, where littoral abundance was greater than deep-water abundace, suggesting faster colonization of the littoral zone. Littoral taxa richness was greater than richness in deep-water, which was attributed to taxa other than Chironomidae and Oligochaeta. Deep-water and most littoral habitats were dominated by Chironomidae, whereas Oligochaeta were occasionally dominant in the littoral zone. Dissolved oxygen was the variable explaining most variance of both littoral abundance and richness.
Littoral macrophyte communities in phosphate lakes differed from natural Florida lakes. Although most phosphate lakes developed emergent littoral zones, submersed vegetation was absent, with few exceptions of the non-indigenous Hydrilla verticillata. Plants clustered in groups reflecting their hydrological designations. Frequently encountered plants classified either in the obligate wetland plant group, characterized by Typha, and inhabiting mostly intermediate-age lakes or the facultative wetland plant group, characterized by Panicum repens. Most plants in the latter group were bimodally distributed in youngest and oldest lakes, whereas few plants were ubiquitous. Littoral plant community composition was determined by both lake morphology and age, but the relative influence of these two components was not clear. Littoral plant composition was a good predictor of lake development.
Morphometric (slope) and sediment characteristics (organic content, particle size) did not differ between the two littoral depths examined (0.5 m and 1.5 m). Slope correlated moderately but significantly with lake age, and organic content was low in all samples.
Total littoral benthic invertebrate abundance and its major component Chironomidae, started from low values at newly created lakes and remained low or increased unpredictably with time. Total, Chironomidae, Oligochaeta and Gastropoda abundances did not differ between the depths of 0.5 m and 1.5 m, whereas taxa richness and the abundance of invertebrates other than Chironomidae, Oligochaeta, and Gastropoda was greater at the shallower depth (0.5 m).The relative effect of lake morphology versus age on benthic invertebrate composition was not clear. Total and Chironomidae abundance increased with lake age at 0.5 m, and bank slope at 1.5 m. Both littoral invertebrate abundance and richness in phosphate lakes were lower than in a natural, mesotrophic, macrophyte-dominated lake in the region, characterized by great Oligochaeta densities.
35
Treloar, Shannon. "Potential for resource competition between the boodie (Bettongia lesueur) and mala (Lagorchestes hirsutus) in the fenced Matuwa reserve, central Western Australia." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2022. https://ro.ecu.edu.au/theses/2514.
Abstract:
Translocations to closed systems such as fenced reserves are commonly used for the conservation of threatened fauna species worldwide and although fenced reserves can provide significant conservation benefits to biodiversity, they can also bring forth potential threats. Ecologically similar species can stably coexist by partitioning resources along at least one of three niche dimensions (food, space, or time), thereby reducing interspecific competition. However, resources are limited in fenced reserves and natural processes that regulate populations in response to resource availability, such as dispersal into surrounding areas, are unable to occur. Consequently, there is increased potential for competition because there are less resources available for partitioning. Furthermore, the removal of predators and competitors, both native and introduced, can increase the risk of overpopulation due to a reduction in the incidence of density-dependant mortality. This can potentially lead to overuse of resources and further increase the potential for competition. Interspecific competition may lead to the decline or exclusion of a more sensitive species by a less sensitive species. Such interactions are difficult to predict, especially as many threatened species no longer naturally co-exist in their current ranges or are poorly studied.
I investigated resource use of two potentially competing native marsupials, boodies (Bettongia lesueur) and mala (Lagorchestes hirsutus), that co-exist in a 1100 ha predator-free fenced reserve located in the arid rangelands of central Western Australia. Resource overlap between coexisting populations of these two species has not been studied previously, but the literature suggests the potential for considerable dietary overlap. I investigated the degree of dietary overlap using scat DNA from non-invasively collected scats, as well as the degree of spatial overlap using scat counts and temporal overlap using camera traps. Boom-bust dynamics have been observed in the Matuwa boodie population (and elsewhere), which raised the concern of subsequent suppression of the potentially less competitive mala. The suppression of mala however cannot be confirmed because there are currently no effective methods to monitor the population size of this elusive species at Matuwa. Therefore, I also trialled non-invasive DNA-based sampling methods using field-collected scats to estimate the abundance of the Matuwa mala population. This method has not been used on mala previously.
Results from the dietary analyses suggest there is potential for significant exploitative competition, as both species’ scats consisted of a high percentage of Acacia spp. However, the Acacia DNA could not be identified to species level and there are at least 19 Acacia species within the enclosure, so it is unknown which species they are consuming, and further studies are necessary to resolve the extend of overlap. Additionally, boodies also consumed a much higher proportion of fungi than mala, which may reduce the extent of overall dietary overlap, thereby reducing the potential for resource competition. The species displayed no sign of significant spatial or temporal avoidance at a broad scale, possibly because dietary partitioning exists so there is limited risk from using the same habitats and having similar activity rhythms. The results however, suggest the potential for fine scale spatial and temporal avoidance; this should be investigated further.
This study successfully used non-invasively collected scat DNA to identify individuals and estimate the abundance of the mala population at Matuwa. Spatially explicit capture recapture (SECR) and mark-resight models estimated a population size of over 110 individuals. With refined scat collection methods, DNA-based sampling will be an effective and valuable method for monitoring mala. This is a significant outcome because current methods have limited success with the elusive species, but it is essential the few remaining mala populations are effectively monitored to prevent further decline.
The information gained from this study will contribute to the successful conservation of boodies and mala by adding to existing knowledge and providing insight into the ability of these species to coexist. Finally, this study will contribute to gaining a better understanding of resource use by small mammals and how they partition resources (including food, space and time) in a closed environment where resources are significantly more limited than the wider landscape.
36
Stephenson, Jaynie M. "Macroinvertebrate Community Structure as an Indicator of Watershed Health in the Upper Trinity River Basin, North Central Texas." Thesis, University of North Texas, 2000. https://digital.library.unt.edu/ark:/67531/metadc2445/.
Abstract:
This study describes macroinvertebrate community structure and assesses its potential in detecting point and non-point sources of disturbance associated with rural and urban areas in the Upper Trinity River Basin. Geospatial techniques were used to quantify landuse within the watershed in a GIS. At rural sites near the headwaters of the Trinity River, collector-gathering burrowers that are adapted to minimal flow comprised the majority of taxa. Destinies of taxa compositions at downstream sites increased and shifted toward psammophilic and rheophilic invertebrates, including primarily collector-filtering clingers, that are characteristic of shifting sand habitats in large prairie rivers. Benthic community structure generally benefited from point source impacts including wastewater treatment plant effluents that maintained higher flow. Community indices were negatively associated with forest landuse and positively associated with urban landuse. Partial CCA determined that flow and landuse contributed equally to species dispersions. Comparisons with historical biomonitoring studies in upper Trinity River Basin indicate improved watershed health.
37
Vice, President Research Office of the. "Sea Change." Office of the Vice President Research, The University of British Columbia, 2009. http://hdl.handle.net/2429/9510.
38
McDonald, Kathryn. "A Critical Analysis of Aquatic and Recreation Centre Planning and Decision-making: A Tale of Two Cases in Metropolitan Melbourne." Thesis, 2021. https://vuir.vu.edu.au/42968/.
Abstract:
Aquatic and recreation centres (ARCs) are social spaces that provide communities with opportunities to be physically active. They deliver important health, well-being, and social benefits to communities and contribute to local economies by providing job and income opportunities (Howat et al., 2012; Tower et al., 2014; Victorian Auditor General’s Office, 2016). Despite the significant role ARCs play in the community, the factors that have guided ARC planning and decision-making processes are largely unknown. To address this knowledge gap, two public sector management theories, new public management theory (NPMT) and public choice theory (PCT), were employed to explain ARC planning and decision-making processes. This is the first time these theoretical lenses have been applied simultaneously to explain ARC planning and decision-making processes. The current study was guided by two research questions, ‘How is a leisure planning process used in ARC planning?’ and ‘How is a decision-making process used in ARC planning?’
A qualitative multiple-case-study design investigated two local government cases in metropolitan Melbourne, Australia. The current study employed two data sources: documents (n= 264) and semi-structured interviews (n=19) to explore the research questions. Data analysis, deductively guided by NPMT and PCT, were conducted using a six-step thematic analysis (Braun & Clarke, 2006, 2012). Data were analysed within the individual cases by using thematic maps to illustrate the components for ARC planning and decision-making processes. The data were then analysed across these two cases through triangulation and pattern-matching to identify the global, organising, and basic themes.
The current study is the first in-depth academic investigation into ARC planning and decision-making processes. The findings explain the lived experiences of people involved in ARC planning and decision-making processes. The current study identified the two cases followed a non-systematic leisure planning process i.e., the local governments applied individual components based on leisure planning models and NPMT to suit their individual ARC’s development. Therefore, the planning process fits somewhere between an ad-hoc planning method, which has no structure, and a structured process similar to a leisure planning model. The ARC planning data analysis identified four focus areas i.e., research, service delivery, engaged experts, and organisational outputs, to explain the process used by the local government when planning an ARC in metropolitan Melbourne. The ARC decision-making data analysis identified three focus areas i.e., government influence, financial influence, and political influence, to explain the ARC decision-making process. Further, the ARC planning and decision-making processes was reliant upon each other. From a practical perspective, the findings explained that local government did not use a structured planning model, however, the two ARCs applied similar planning and decision-making focus areas. These focus areas act as a starting point in the development of a model of how ARCs are planned in metropolitan Melbourne. From a theoretical perspective, the findings identified that the ARC planners in the two cases made decisions that were explained by financial outputs (NPMT) and political behaviours (PCT), indicating that ARC decision-making was more weighted towards financial outcomes rather than community benefit.
39
Cheung, Lisa. "The Vancouver Aquatic Centre: in-between phenomenon : water and land." Thesis, 1997. http://hdl.handle.net/2429/7622.
Abstract:
A modern large recreational hall may hardly recognize a sense of human scale nor provide
users the architectural meaning corresponding to the activities it accommodates. The
experimental project of renovating the Vancouver Aquatic Center attempts to reinstate the
relationship between the body, water and architecture.
There exist certain sequence and pattern in participating various leisure/fitness activities
which require mental and physical preparation. I focus on accentuating the transitional
experiences at different stages of taking part swimming, diving, and hot baths by creating
spaces to allow mental readiness for activities and contemplation of experience. Thus, I
explore the perception of edges by marking of different threshold, making it subtle or
bringing it out into presence. This practice requires much envision of walking through the
building and anticipation of how space to be used which corresponds to my study of history of
bathing and questions of perception.
In order to reintroduce the social value of bathing which exists in Japanese bath and the like, I
expand the facilities program parallel to the concept of Roman Thermae where people can
meet and interact. Therefore, the proposed new aquatic centre seeks to enhance social and
visual communication between the surrounding environment and the building, between users
outside and inside, between different activities within the building.
Moreover, initiated by the study of phenomenological architecture, this project revolves
around the idea of intriguing memories and emotions through associative and tactile
experience by the use of materials, spatial configuration, lighting, transparency and the
placement of apertures to capture views. I try to provide diversified experience with different
forms of water, steam, hot/cold temperatures, brightness/darkness, hard/soft land,
submerge/emerge, clear/opaque and other perception of space. The ultimate goal of this
experiment is to provide users the meanings of the architectural form, space, material and
order, yet as well give potential to allow the users' own interpretations.
40
Hsiao, Richard Clement Annie. "Analysis of risk management practices and litigation status in aquatic centers." Diss., 2005. http://etd.lib.fsu.edu/theses/available/etd-04112005-224915.
Abstract:
Thesis (Ph. D.)--Florida State University, 2005.Advisor: Dr. Annie Clement, Florida State University, College of Education, Dept. of Sport Management, Recreation Management, and Physical Education. Title and description from dissertation home page (viewed June 13, 2005). Document formatted into pages; contains xi, 128 pages. Includes bibliographical references.
41
Heron, Carl P., and O. E. Craig. "Aquatic Resources in Foodcrusts: Identification and Implication." 2015. http://hdl.handle.net/10454/9355.
Abstract:
NoFoodcrusts, the charred surface deposits on pottery vessel surfaces, provide a rich source of data regarding container function. This article reviews recent applications focusing on the detection of aquatic resources (marine and freshwater) in pottery vessels using a range of analytical approaches including bulk isotope measurements of carbon and nitrogen, lipid biomarker analysis, and compound-specific carbon isotope determinations. Such data can help to evaluate the presence of reservoir effects when undertaking radiocarbon dating of foodcrust samples. In particular, molecular and isotopic analysis can aid in the selection of suitable candidates for C-14 where it can be demonstrated that aquatic resources are unlikely to contribute to the residue. Prospects for compound-specific C-14 analysis of lipids in foodcrusts and ceramic-absorbed residues are also discussed.
42
Howie, Craig John. "Towards a relevant architecture : an international rowing and canoeing regatta centre for KwaZulu-Natal, South Africa." Thesis, 2010. http://hdl.handle.net/10413/7801.
Abstract:
2008 was a year which highlighted how far South
Africa has fallen behind the rest of the world in the
international Olympic sporting arena. High hopes for
the Olympic Games in Beijing ended in a lower-than expected
medal tally that sparked great debate in South
African society. The reasons for this phenomenon are
numerous and complex and it is not the intention of this
dissertation to investigate all these concerns. However,
what is of an architectural concern is the inadequate
and often sub-standard sporting facilities which athletes
in South Africa, in non-mainstream sporting codes, have
to contend with.
The challenge for architects in this regard is to design
buildings for these sports, that are both adequate and
of a suitable standard, while remaining relevant to their
context. This to promote professionalism and inspire
athletes to succeed through the creation of high quality,
world-class facilities for competition, training and
preparation.
Rowing, canoeing and kayaking are highly competitive
and technologically advanced Olympic sports. Many
South African athletes compete in these disciplines and
have enjoyed limited international success. Unfortunately,
as there are currently no international regatta centres
in Southern Africa, these same athletes have to travel
abroad to compete and train at such facilities. South
African athletes and the sports of rowing, canoeing and
kayaking would thus benefit greatly from having access
to locally based regatta facilities.
KwaZulu-Natal has a proud sporting heritage and
is synonymous with water sports as a result of its
favourable climate and geographic location. This coupled
with various other established sporting infrastructure,
makes it the ideal Province for hosting major sporting
events. Both Durban as a city and KwaZulu-Natal
as a Province, have an impressive track record for
hosting large sporting events. The Province has future
aspirations of hosting major sporting events including
the Commonwealth Games and the Olympics Games,
with Durban soon hoping to be bidding to host the 2020
Summer Olympics. To host such events will require the
design of many specialised sporting facilities for the city
and will include the need for an international regatta
centre. In my opinion, the best site for such a centre in
KwaZulu-Natal is at Camps Drift in Pietermaritzburg.
The requirements for an international regatta centre
are both highly technical and very specific as set out by
the respective world sporting governing bodies. These
requirements need to be strictly adhered to in order for
the Centre to be considered to be of an internationalstandard.
The challenge will be to design architecture
that is functional in achieving these set criteria
while, remaining relevant to the social, economic and
environmental context of its design.
Thus the purpose of this research document is to
determine a relevant architecture for the design of an
International Regatta Centre for KwaZulu-Natal.Thesis (M.Arch.)-University of KwaZulu-Natal, Durban, 2010.
43
Luecker, Terry A. "Aquatic invertebrate-habitat relationships and stream channel cross section area change in response to streamside management zones in North Central Mississippi /." 2004. http://hdl.handle.net/1957/9567.
44
RAMOS, GONCALVES VERA LUCIA. "Interactions between two invasive alien species, Procambarus clarkii and Dreissena polymorpha, in the aquatic ecosystems of central Italy." Doctoral thesis, 2014. http://hdl.handle.net/2158/854698.
Abstract:
Interactions between two invasive alien species, Procambarus clarkii and Dreissena polymorpha, in the aquatic ecosystems of central Italy
(DOTTORATO DI RICERCA IN ETOLOGIA, ECOLOGIA ANIMALE ED ANTROPOLOGIA)
45
"Programmatic hybridity." 2002. http://library.cuhk.edu.hk/record=b5891320.
Abstract:
Chan King Ming."Architecture Department, Chinese University of Hong Kong, Master of Architecture Programme 2001-2002, design report."
Chapter 1. --- Topic defined
Chapter 2. --- Programs defined
Chapter 3. --- Research
Precedent Study
Case Study
Technical Study
Chapter 4. --- Sketches
Water Sport Transformation
Combinations
Chapter 5. --- Site Selection
Chapter 6. --- 1st Proposal of Combination
Chapter 7. --- Logic of Combination
Chapter 8. --- Revised Proposal of Combination
Chapter 9. --- Design Refine
Chapter 10. --- Final Design
46
Gonyo, Andrew William. "An 800-year multiple-proxy record of atmospheric circulation, climate change, and aquatic productivity from Kepler Lake, South-Central Alaska." 2009. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1463971.
47
"Proposed environmental education center development at Tai Mong Tsai, Sai Kung." 1999. http://library.cuhk.edu.hk/record=b5895785.
Abstract:
Lau Man Chun Patrick."Architecture Department, Chinese University of Hong Kong, Master of Architecture Programme 1998-99, design report."
Includes bibliographical references.
Chapter ´Ø --- Acknowledgements
Chapter ´Ø --- Prelude
Chapter 1. --- Introduction and summary
Chapter ´Ø --- Issues and Goals
Chapter ´Ø --- Environmental problems has educational roots
Chapter ´Ø --- Environmental education
Chapter ´Ø --- Environmental education in Hong Kong
Chapter ´Ø --- The importance of primary experience in the natural environment
Chapter ´Ø --- Opportunities
Chapter ´Ø --- Conclusions
Chapter ´Ø --- Summary
Chapter ´Ø --- Hypothetical client
Chapter ´Ø --- Site
Chapter ´Ø --- Financial consideration
Chapter 2. --- The Project Brief
Chapter ´Ø --- Site and Constraints
Chapter ´Ø --- Space Program
Chapter ´Ø --- Concept Developments
Chapter 3. --- The Design
Chapter ´Ø --- Design Development
Chapter ´Ø --- "Final Plans, Sections, Elevations, Details,"
Chapter 4. --- Bibliography
Chapter 5. --- Appendices
Chapter A. --- Research
Chapter 1. --- Environmental Education
Chapter 2. --- Government strategies on environmental protection
Chapter 3. --- Hypothetical client profile and preferences
Chapter B. --- Site selection and comparison
Chapter C. --- Construction cost estimation
Chapter D. --- Space Program development
Chapter E. --- Precedents Study
Chapter F. --- Interviews
48
Ross, Jason Bruce. "An investigation of the distribution patterns of aquatic vertebrates across four sites in the upper Parramatta river catchment." Thesis, 2000. http://handle.uws.edu.au:8081/1959.7/26017.
Abstract:
Freshwater vertebrates were sampled in different waters of the Upper Parramatta River catchment to determine their patterns of distribution with respect to water quality. A total of 730 animals (831 captures)were caught between November 1997 and December 1998. Data was collected on three freshwater turtle species, and four fish species.The abundance of aquatic vertebrates was correlated with physiochemical water quality parameters. The large aquatic vertebrates studied did not correlate with the commonly used parameters for aquatic health. The assumption ANZEEC water quality parameters are the definitive determinant of aquatic health for vertebrates is, therefore, erroneous.
49
Beck, Kristen K. "A Holocene Paleolimnological Record from the Turkey Lakes Watershed Long-term Monitoring Site in Central Ontario, Canada." Thesis, 2013. http://hdl.handle.net/1807/35584.
Abstract:
A Holocene lake sediment record spanning 7300 years from Wishart Lake, in the Turkey Lakes Watershed central Ontario, was produced to determine the main drivers of long-term change in the lake ecosystem. The mid-Holocene sediments are dominated by benthic diatoms, around 4000 yrs BP, diatoms in the genera Cyclotella and Tabellaria increase. Comparisons with nearby pollen records show that changes in local vegetation and diatom assemblages occurred synchronously, suggesting a response to nutrient changes caused by vegetation succession. The most recent sediments, dated using activity of 210Pb and the Ambrosia pollen rise, show increases in planktonic Cyclotella spp., particularly around the Ambrosia rise (1880 AD). Thus, the diatom changes in the recent sediments suggest a response to multiple stressors. However, due to some buffering capacity in watershed soil, recent acidification of the lake has not taken place despite nearby industrial air pollution, tracked since 1980 by an on-site monitoring program.
50
Mackenzie, Kirsten Dawn. "The effects of streamside forest harvesting on aquatic macroinvertebrates and rainbow trout (Oncorhynchus mykiss): Diet in the central interior of British Columbia, Canada." Thesis, 2005. http://hdl.handle.net/2429/16343.
Abstract:
Timber harvesting has the potential to alter stream ecosystems in a variety of ways, impacting
stream habitat, food resources, and ambient conditions for a variety of stream biota. While
ample attention has been focused on salmonid-bearing streams in the coastal areas of British
Columbia, comparatively little research has been applied to the interior regions of the province
where climate, topography, and forest practices differ wildly from the wet, mountainous west
coast. This thesis investigates the effect of streamside forest harvesting on the benthic and drift
macroinvertebrate communities, and on the diets of stream-resident rainbow trout in three
small, lake-headed streams in the central interior of B.C. Benthic invertebrate biomass and
abundance, community composition, and functional feeding guild composition did not exhibit
post-logging changes in the two treatment streams relative to the control. Similarly, the
biomass, abundance, community composition, and functional feeding guild composition of the
drift invertebrate community did not show marked differences between logged and unlogged
streams. Rather, patterns within both of these communities tended to reflect natural
temperature differences evident among the streams. Rainbow trout in the two logged streams
exhibited significantly lower condition (weight for a given length) than trout in the unlogged
control stream. Trout in the control stream ate a greater biomass and abundance of
invertebrates than trout in the logged streams. Trout in the control stream also tended to eat
larger invertebrates than fish in the logged streams; however, this did not reflect differences in
the size of prey items available in the drift. Two families of invertebrates tended to dominate the
biomass and abundance of the stomach contents of all fish: Ephemeroptera (mayflies) and
Diptera (true flies). Neither the size, abundance, nor biomass of these primary prey organisms
were affected by the logging treatment. The unique temperature regimes coupled with density
dependence associated with these small lake-headed streams were likely the most important
factors in regulating invertebrate communities and fish growth in these small streams.Forestry, Faculty of
Graduate