Dissertations / Theses on the topic 'Benthic invertebrate community'
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Laureta, L. V. "Trophic dynamics of a benthic community, with particular reference to the ecological energetics of Corbula gibba (Olivi)." Thesis, University of Liverpool, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381336.
Full textBennett, Barbara Loraine Jr. "Land use influences on benthic invertebrate assemblages in southern Appalachian agricultural streams." Thesis, Virginia Tech, 1998. http://hdl.handle.net/10919/36940.
Full textMaster of Science
Wells, Elizabeth Hamilton. "Evolutionary novelty and naivete in invertebrate predator-prey interactions in a benthic marine community." Thesis, University of California, Davis, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=3565574.
Full textIn the first chapter of this dissertation, I explore the role of shared evolutionary history in determining predation preferences of a suite of three generalist muricid whelks preying on oysters and mussels. Various theories such as the enemy release and novel weapons hypotheses predict how evolutionary novelty will affect predator-prey interactions, but it is not clear how applicable these theories are to interactions between generalist predators and familiar prey types. In addition to determining whether the one native and two invasive whelks preferred to consume evolutionarily familiar or novel oysters and mussels, I determined the optimality of each prey species via metrics such as food reward, ease of predation (shell thickness), and food:handling time ratios. By explicitly asking if predation hierarchies mirrored optimality, I was able to determine whether evolutionary constraints were preventing the whelks from consuming prey that were more optimal.
In the second chapter of the dissertation, I asked whether there had been post-invasive changes in predation preferences for one of the invasive whelks used in the first chapter, the Eastern oyster drill Urosalpinx cinerea. The results of this study, which indicate that even highly generalist invasive predators consuming a familiar prey type can experience post-invasion changes in naïveté and predation preference strength, serve as a reminder that a potential or new invader's interactions with and impact on species in the recipient community can be hard to predict.
The third chapter of this dissertation documents the loss of an invasive predator's naïveté towards new species prey in real time, and compares the two prey species' behavioral and morphological responses to both general and specific predation cues. I studied the predator-prey dynamics of the invasive European green crab Carcinus maenas and two species of snails, both of which are invasive on the Pacific coast of North America: the Eastern mud snail Ilyanassa obsoleta and the Asian hornsnail Batillaria attramentaria.The results of this research lead me to conclude that, as with the results of Chapter 2, even generalist predators are capable of losing naïveté to new prey and of changing prey preferences following relatively short exposure to new prey. In addition, this research indicates that between species that do not share an evolutionary history, CEs may be very quick to develop, while NCEs that are induced by predator cues may not be like NCEs between evolutionarily familiar species, and may augment the CEs. (Abstract shortened by UMI.)
Wright, Sara E. "Spatial structuring of benthic invertebrate communities within and among wooded headwater stream networks." Youngstown State University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1329070085.
Full textCalder-Potts, Ruth Naomi. "The biological and ecological impacts of hypoxia on coastal benthic communities." Thesis, University of Plymouth, 2017. http://hdl.handle.net/10026.1/9352.
Full textPohe, Stephen Robert. "Aquatic invertebrate fauna of Matapouri, Northland." Click here to access this resource online, 2008. http://hdl.handle.net/10292/425.
Full textDurkota, Jessica M. "Groundwater ecology : invertebrate community distribution across the benthic, hyporheic and phreatic habitats of a chalk aquifer in southeast England." Thesis, University College London (University of London), 2018. http://discovery.ucl.ac.uk/10040830/.
Full textGumede, Sabelo Victor. "A study of benthic invertebrate community structure in selected areas on the continental shelf off KwaZulu-Natal, South Africa." Master's thesis, University of Cape Town, 2001. http://hdl.handle.net/11427/6261.
Full textMcChesney, Stephen. "The benthic invertebrate community of the intertidal mudflat at the Mai Po Marshes Nature Reserve, with special reference to resources formigrant shorebirds." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1997. http://hub.hku.hk/bib/B31214435.
Full textMcChesney, Stephen. "The benthic invertebrate community of the intertidal mudflat at the Mai Po Marshes Nature Reserve, with special reference to resources for migrant shorebirds /." Hong Kong : University of Hong Kong, 1997. http://sunzi.lib.hku.hk/hkuto/record.jsp?B18061977.
Full textAverhed, Björn. "Kan förändringar i bottenfaunan påvisas två år efter en bäckrestaurering?" Thesis, Linköping University, Linköping University, Department of Physics, Chemistry and Biology, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-57866.
Full textThe aim of this work is to analyze if a change in the benthic community can be detected two years after a restoration of a small stream. The samples were taken in a small stream at Tinnerö Eklandskap just south of Linköping. In addition to the restored area, two reference sites upstream and downstream of the restored area were sampled to compare to the restored site. The method used for sampling of benthic fauna in the stream was kick sampling. ASPT, Berger-Parker and Renkonen-indices were used to find out if there was any difference between the reference areas and the restored area. In addition to indices, rank-abundance curves and species lists were made to see if there was any trend difference between the different areas. The only index that showed a difference between the different areas was Berger-Parker diversity index. The reason why there were no greater differences between the areas may be due to the fact that two years is too short to allow time for the benthos to re-colonize the restored area.
Mercer, Jennifer Lynne. "Changes in the benthic invertebrate community and the feeding, growth, and PCB accumulation in the three littoral zone fishes following a zebra mussel invasion in Rice Lake, Ontario." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ30226.pdf.
Full textCampbell, Rebecca Elisabeth. "Spatial pattern and community assembly: does the configuration of stream networks influence their community structure?" Thesis, University of Canterbury. School of Biological Sciences, 2011. http://hdl.handle.net/10092/5094.
Full textMeyer, Kirstin. "Community assembly of benthic invertebrates on island-like marine hard substrata." Thesis, University of Oregon, 2016. http://hdl.handle.net/1794/20686.
Full textMeyer, Kirstin S. "Community assembly of benthic invertebrates on island-like marine hard substrata." Thesis, University of Oregon, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10192050.
Full textMost of the seafloor is soft sediment, so hard substrata are isolated and island-like. In this dissertation, I explore how species distribution patterns on isolated marine hard substrata resemble terrestrial island communities, drawing on classical island biogeography theory and assembly rules, and describe how benthic invertebrate communities assemble in these island-like habitats. Higher species richness occurred on larger substrata (dropstones and shipwrecks), paralleling terrestrial island communities. However, while larger islands have greater habitat diversity and primary productivity, marine hard substrata are simpler habitats. Greater elevation in the benthic boundary layer may expose fauna to faster current, higher food supply and larval flux. Substrata located closer together had more similar communities, another pattern that resembles terrestrial islands. Dropstone fauna had a clumped distribution, indicating that larvae may disperse among substrata located close together, resulting in similar communities. In Svalbard fjords, benthic megafaunal communities were significantly different between Arctic- and Atlantic-influenced fjords. Depth and temperature had the greatest influence, with the highest diversity occurring in cold Rijpfjorden and on the north Svalbard shelf. Recruitment in Svalbard fjords was spatially and temporally variable, with lower recruitment in Rijpfjorden than in Atlantic-influenced fjords and lower recruitment at greater depth. Most of the recruits in Svalbard fjords were fast-growing, poor-competitive opportunists. On shipwrecks, communities showed two mechanisms of colonization: mobile fauna with long-dispersing planktotrophic larvae, and encrusting fauna with lecithotrophic larvae. Encrusting species reproduce asexually to cover the wreck surface, and philopatry may build up dense populations, leading to uneven communities. On terrestrial islands, non-random co-occurrence is attributed to interspecific competition, but for marine substrata, there may not be a relationship. Fauna were distributed randomly on settlement plates in Svalbard fjords, even when interspecific competition was observed. On dropstones, some morphotypes co-occurred non-randomly in the absence of overgrowth competition. Non-random co-occurrence on isolated marine hard substrata may be a result of restricted larval dispersal (for pairs co-occurring less than by chance) or epibiontism (for pairs co-occurring more often than by chance). While species distribution patterns on island-like marine hard substrata resemble terrestrial islands, the mechanisms are not necessarily the same.
Word, Jack Q. "The infaunal trophic index, a functional approach to benthic community analyses /." Thesis, Connect to this title online; UW restricted, 1990. http://hdl.handle.net/1773/5289.
Full textRogers, Megan Bryn. "Woody debris and macroinvertebrate community structure of low-order streams in Colville National Forest, Washington." Connect to this title online, 2003. http://www.dissertations.wsu.edu/Thesis/Fall2003/m%5Frogers%5F121503.pdf.
Full textOrzetti, Leslie LuChar. "Stream community structure an analysis of riparian forest buffer restoration in the Chesapeake Bay watershed /." Full text available online (restricted access), 2004. http://images.lib.monash.edu.au/ts/theses/Orzetti.pdf.
Full textKilfoyle, Audie Kirk. "Exploring the Potential for Artificial Reefs in Coral Reef Restoration: Responses and Interactions of Associated Biota to Varying Experimental Treatments in the Mexican Caribbean." NSUWorks, 2017. http://nsuworks.nova.edu/occ_stuetd/440.
Full textHsu, Hsien-Fu, and 徐顯富. "Temporal and spatial changes of benthic invertebrate community in Taoyuan algal reefs." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/85386061789904912429.
Full text國立中興大學
生命科學系所
102
Algal reefs located in Taoyuan have the largest cover area in Taiwan. Invertebrates are important in coastal ecosystems, they are foods for high consumers and affect high consumers’ distribution and abundance. There were four sampling area along the coast of Taoyuan, including Sinwu river (SW), Datan power plant (DT), Guanyin beach (GY) and Shulinzih (SL). In this four sampling area, two transects of each area were surveyed for the distribution and abundance of epifauna in four seasons of a whole year from September 2012 to June 2013. In addition, a piece of reef was sampled at different elevation sites (high, medium and low) along the transects in each area for the survey of infauna. In total, 64 taxa of invertebrate were identified during the study period. Total abundance of epifauna ranged from 0-73 ind. m-2, and that of infauna ranged from 933-8866 ind. m-2. The highest abundance of epifauna was observed at SW, but the highest taxon number was found at DT. The most dominant species of epifauna was gastropods and the most dominant species of infauna was polychaetes. Higher abundance of malacostracans was found in DT. Polyplacophoras abundance was higher in the spring of DT and SW. The highest abundance and taxon number of infauna was at DT. However, the lowest abundance and taxon number of benthic invertebrates was observed at SL. The community composition was different from those of other sampling area. There were no significant differences of community composition between gravel beach and algal reefs. Our results showed the algal reefs at SL was heavily polluted and those at GY was disturbed by frequent sedimentation. It is clear that pollution and sedimentation is the major influencing factors on the benthic invertebrates inhabiting algal reefs along the coast of Taoyuan.
St, John Margaretha Ann. "The Benthic Invertebrate Community of Lakes Previously Impaired by MiningI-related Acidification Near Wawa, Ontario." Thesis, 2009. http://hdl.handle.net/1807/17447.
Full textDai, Li, and 戴立. "A study of benthic invertebrate community and environmental factors of salty artifical wetlands." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/27347582845949385409.
Full text國立中山大學
海洋環境及工程學系研究所
99
The objectives of this study are to investigate the biodiversity in different unit of treatment systems, and to detect the function in a salt water type of constructed wetland. We investigated the benthic invertebrate community in different stage from 2010 July to 2011 May, while the parameters of TKN, NH3-N, organic nitrogen, TP, TOC and particle size were measured in the sediments of each sampling site at the same time in the wetland system. The results show that concentrations of organic matter and nutrients in the sediments were increased with time monthly. In May of 2010, the concentration of NH3-N were found the highest one(ANOVA, p<0.05). The particle size in sampling site 1 were the highest (ANOVA, p<0.05), while in November of 2010 all sampling sites were found exhibiting significantly different with other months (ANOVA, p<0.05). Further more, for the diversity of benthic invertebrate, we found that the parameter of the temperature was strongly negatively related to the species diversity, species abundance and species evenness, respectively (r=-387[H’];-533[d];-438[J’] ). The species diversity was increased with organic nitrogen concentrations in the sediments (r=0.492[TKN];0.408[NH3-N];0.493[org-N]), and were negatively related to the parameters of DO and particle size(r=-0.402[Particle size];-0.287[DO] ). In addition, PCA shows that the parameters of particle size、org-N、NH3-N、TKN and TOC were all important factors. Generally, it was concluded that the constructed systems, which is functioned of wetland was wastewater treatment mainly, exhibit no significant function in biodiversity.
Dewas, Severine Emmanuelle Alexandra. "Benthic-invertebrate diversity of Tucetona laticostata (Mollusca: Bivalvia) biogenic substrata in Hauraki Gulf." 2008. http://hdl.handle.net/10292/454.
Full textLinden, Pieter van der. "The functional composition of the benthic invertebrate community of the Mondego estuary : insights within the functioning of this ecosystem." Master's thesis, 2011. http://hdl.handle.net/10316/19928.
Full textThe main aim of this study was to investigate the functional composition of the subtidal benthic invertebrate communities of the Mondego estuary and thus contributing to a better understanding of the response of these communities to the pressures within this type of ecosystem. We characterized the environmental conditions and investigated the spatial and seasonal distribution of the communities by means of traditional taxonomic analysis and BTA. Moreover, we investigated the relation between taxonomic and functional composition by comparing indices of taxonomic and functional diversity. Traditional taxonomic analysis highlighted spatial and seasonal variations of community composition (i.e., a general reduction of species richness, Shannon-Wiener diversity, and an increase of species density towards the upper parts of the estuary). BTA analysis highlighted the functional characteristics of the benthic community within the estuary and common features across species that have appeared or disappeared among seasons. Furthermore, BTA allowed to investigate interactions among traits (i.e., the strong influence of the trait ‘salinity preference’) and was used to calculate functional diversity (FD). Indices of taxonomic diversity (Shannon-Wiener index) and FD (RQE index) allowed to explore the relation between taxonomic and functional composition. This relation might potentially have indicated that the community at the upper most reaches of the estuary exhibits lower functional redundancy than the downstream assemblages. This study represents one of the first attempts to investigate the functional composition of the benthic invertebrate community in an estuarine environment by means of BTA. BTA in addition to traditional taxonomic analysis provided a more comprehensive understanding of the functioning of this ecosystem. Therefore, the inclusion of BTA is highly recommendable for estuarine ecological studies, but more research is needed to improve its effectiveness regarding the following issues: (i) the set of selected biological traits should be optimized towards the inclusion of more relevant ecological information. This objective can be achieved by improving the knowledge on single species biological traits, which is at present still fragmentary; (ii) the biological traits of species should be linked with the services these environments provide. This traitservice association will be a crucial step in ecosystem service monitoring and management.
Gaber, Leon Sebastion. "Measuring the impact of agricultural land use intensification on benthic macroinvertebrate community dynamics within an agricultural watershed." Thesis, 2008. http://hdl.handle.net/1828/2564.
Full textGerard, Kerry J. "The effects of stream restoration and sediment removal on community dynamics and secondary production rates of benthic invertebrates in Juday Creek, Indiana." 2005. http://etd.nd.edu/ETD-db/theses/available/etd-11042008-101621/.
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