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Dissertations / Theses on the topic 'Communities assembly'

Author: Grafiati

Published: 4 June 2021

Last updated: 4 February 2022

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1

Lindsay, Hazel M. "Testing community assembly theories in epifaunal fouling communities." Thesis, Edinburgh Napier University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.270651.

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Elliott, J. A. "Investigating the assembly of phytoplankton communities with PROTECH." Thesis, Edinburgh Napier University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325890.

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3

González, Trujillo Juan David. "Dissecting the assembly process of benthic communities from Neotropical streams." Doctoral thesis, Universitat de Girona, 2020. http://hdl.handle.net/10803/670235.

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I used the metacommunity framework to dissect the relative influences of dispersal (in ecological and evolutionary timeframes), selection (driven by abiotic factors) and ecological drift on the assembly process of freshwater benthic communities. The study was carried out at 26-32 different stream segments within an area of about 40,000km2, in the Colombian Orinoco. The area encompasses an elevation gradient from 3400 to 300m a.s.l. and includes a heterogeneous assembly of ecoregions and landscapes. By using a pattern-matching approach, I provide evidences supporting that dispersal, selection a

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4

Burns, Adam. "Assembly of microbial communities associated with the developing zebrafish intestine." Thesis, University of Oregon, 2016. http://hdl.handle.net/1794/20703.

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The communities of microorganisms associated with humans and other animals are characterized by a large degree of diversity and unexplained variation across individual hosts. While efforts to explain this variation in host-associated systems have focused heavily on the effects of host selection, community assembly theory emphasizes the role of dispersal and stochastic demographic processes, otherwise known as ecological drift. In this dissertation, I characterize the communities of microorganisms associated with the zebrafish, Danio rerio, intestine, and assess the importance of microbial disp

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Bambrick, Elaine Dobie. "Stochastic and deterministic assembly within forest plant communities of British Columbia." Thesis, University of British Columbia, 2013. http://hdl.handle.net/2429/44566.

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Patterns of beta diversity, the variation in species composition among sites, are often used to gain insights into the processes governing plant community assembly. Deterministic processes including environmental selection and stochastic processes such as stochastic colonization and extinction, and / or priority effects vary in their relative importance for explaining patterns of diversity. Sampling strategies that simultaneously control for variation in the environment as well as gradients in species richness improve our ability to quantify the relative importance of stochastic and determinis

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6

Pillay, Pradeep. "The ecological and evolutionary assembly of competitive communities in dynamic landscapes /." Thesis, McGill University, 2006. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=101164.

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We use metapopulation models based on a classic competition-colonization trade-off in order to (1) study community responses to spatially structured habitat loss on dynamic landscapes when species are assembled by ecological (biogeographic) processes; and (2) to study how species are assembled into communities by evolutionary mechanisms. In the first part of our study we show how the response of species richness to habitat destruction in dynamic landscapes can be driven by the existence of either the spatial structure of habitat dynamics or by life-history trade-offs among species. In the seco

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Drobnik, Juliane [Verfasser], and Peter [Akademischer Betreuer] Poschlod. "Assembly rules in grassland plant communities / Juliane Drobnik. Betreuer: Peter Poschlod." Regensburg : Universitätsbibliothek Regensburg, 2011. http://d-nb.info/102336185X/34.

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Booth, Barbara Diane. "Biological processes controlling the assembly of plant communities on cliff faces." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ40363.pdf.

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9

Moore, Joslin Lynley. "Coexistence, assembly and invasion of plant communities in theory and practice." Thesis, Imperial College London, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.312122.

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10

Sarremejane, R. (Romain). "Community assembly mechanisms in river networks:exploring the effect of connectivity and disturbances on the assembly of stream communities." Doctoral thesis, Oulun yliopisto, 2018. http://urn.fi/urn:isbn:9789526218632.

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Abstract Community assembly results from a combination of deterministic and stochastic mechanisms, whose relative effects can vary in response to environmental heterogeneity, connectivity, disturbance regimes and anthropogenic stressors. Understanding how community assembly mechanisms vary in response to environmental changes and connectivity is crucial for the management and conservation of river ecosystems. In this thesis, I tested the effects of connectivity and natural flow disturbances on riverine invertebrate communities by assessing assembly mechanism changes in response to (I) habitat

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11

Ricks, Kevin Daniel. "Biotic Filtering in Endophytic Fungal Communities." BYU ScholarsArchive, 2018. https://scholarsarchive.byu.edu/etd/6871.

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Plants can be colonized by complex communities of endophytic fungi. This thesis presents two studies, both of which investigate biotic filtering in endophytic fungal communities. Chapter 1. Endophytic fungi can be acquired horizontally via propagules produced in the environment such as in plant litters of various species. Given that litters from different plant species harbor distinct endophytic fungal communities and that endophytic fungi may be dispersal-limited, the structure of the endophytic fungal community of a given plant may be determined by proximity to particular inoculum sources. C

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12

Geerts, Sjirk. "Assembly and disassembly of bird pollination communities at the Cape of Africa." Thesis, Stellenbosch : Stellenbosch University, 2011. http://hdl.handle.net/10019.1/6904.

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Thesis (PhD (Botany and Zoology))--Stellenbosch University, 2011.<br>ENGLISH ABSTRACT: With the current global decline in pollinators, and the concurrent decline in plant species, pollination research is becoming increasingly important. However, studies outside Europe and North-America and on groups other than insects are needed to make generalisations possible. In this thesis I study how pollination structures plant and bird communities in a biodiversity hotspot, the Cape Floristic Region of South Africa. I show that bird-plant pollination mutualisms are an important ecological factor structu

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13

Berga, Quintana Mercè. "Assembly Mechanisms in Aquatic Bacterial Communities : The Role of Disturbances, Dispersal and History." Doctoral thesis, Uppsala universitet, Limnologi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-207183.

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Environmental conditions, biotic interactions, dispersal and history have been suggested to be important processes influencing the spatial distribution of organisms and thus to affect community assembly. Understanding how these processes influence community assembly is important, particularly because community diversity and composition are suggested to be relevant for ecosystem functioning. Moreover, bacteria are strongly contributing to nutrient and carbon cycle. Bacteria are highly abundant and ubiquitous, and thus it is relevant to study how they are assembled. This thesis aims to gain insi

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14

Woodcock, Stephen Mark. "Modelling the assembly and structure of microbial communities with applications to waste treatment strategies." Thesis, University of Glasgow, 2007. http://theses.gla.ac.uk/4468/.

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The central premise of this thesis is that combining models in theoretical ecology with our newfound ability to observe and measure microbial systems will allow for a suite of laws to be developed which can describe and predict the assembly and structure of microbial communities. This would allow environmental engineers to modify and improve the design and efficiency of wastewater treatment systems. It is demonstrated here that there is significant evidence that microbial community assembly is at least partly a random process. A simple Neutral Community Model (NCM) is shown to replicate much o

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Orland, Chloé Shoshana Jessica. "Assembly and functioning of microbial communities along terrestrial resource gradients in boreal lake sediments." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/284909.

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Terrestrial inputs of organic matter contribute greatly to the functioning of aquatic ecosystems, subsidizing between 30-70% of secondary production. This contribution of terrestrial resources is especially important in boreal lakes that are largely nutrient-poor and thus more responsive to these additions. Yet the mechanisms underlying initial processing of terrestrial resources by microbial communities at the base of lake food webs remain poorly understood. With this in mind, this thesis aims to advance our understanding of lake sediment microbial community assembly and functioning along abi

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Zha, Yinghua. "Assembly of Gut Microbial Communities in Freshwater Fish and Their Roles in Fish Condition." Doctoral thesis, Uppsala universitet, Limnologi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-314235.

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Animal hosts provide associated microorganisms with suitable ecological niches in their intestines. Microbes help their hosts to digest food, protect against pathogens, and influence the host’s metabolisms. Compositional variation of gut microbial communities is common among hosts, and may affect the health status of hosts. Diet and genetic factors are well known to influence the assembly of gut microbial communities. This thesis focuses on disentangling the contributions of factors including host genetics (sex), diet, environment, and other ecological processes to the assembly of gut microbia

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Castro-Arellano, Ivan. "Ecological patterns of the small mammal communities at El Cielo Biosphere Reserve, Tamaulipas, Mexico." Texas A&M University, 2005. http://hdl.handle.net/1969.1/4955.

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Scarce knowledge of Neotropical small mammal communities prevents experimental inquiry on the mechanisms structuring these communities. In this study, I examined patterns of local assembly of the small mammal communities on the eastern slopes of El Cielo Biosphere Reserve (ECBR) in Tamaulipas, Mexico, at two spatial scales. At the landscape level I tested patterns of species co-occurrences between four sites with a null model. At the local level I addressed floor microhabitat use, vertical structure use and temporal partitioning. I studied these niche axes at two adjoining forest types, Tropic

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18

Dalton, David Carlton. "Celebrating congregational identity in the Wanchese Assembly of God Church." Online full text .pdf document, available to Fuller patrons only, 1999. http://www.tren.com.

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Smith, Scott A. 1978. "The importance of regional and historical processes in the assembly and maintenance of lower Mesoamerican freshwater fish communities /." Thesis, McGill University, 2004. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=80875.

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The relative importance of local, regional and historical processes to patterns of distribution and diversity of lower Mesoamerican (Panama and Costa Rica, LMA) freshwater fishes are examined at two different spatial scales. Biogeographic patterns of LMA freshwater fish communities at the spatial extent of LMA indicate that biological differences among species as well as regional and historical processes are quintessential to explaining the patters of turnover of community composition and species richness across the LMA Isthmus. The study of LMA freshwater fishes permits the inference t

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Tornwall, Brett Matthew. "The role of dispersal networks in structuring biotic communities: A tale of streams and metacommunity theory." Diss., Virginia Tech, 2016. http://hdl.handle.net/10919/75004.

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Identifying the processes and mechanisms that govern communities of organisms is the main goal of community ecology. Locally operating mechanisms such as environmental filtering, in which the environment determines what species are found in a given location, as well as regional processes such as dispersal have all been identified as potential drivers of community processes. However, the relative importance of these drivers may vary temporally and spatially. In dendritic stream networks, headwater streams are isolated when compared to more centrally located mainstem stream sections. I investig

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Kaye, Maria Ellen. "The role of functional traits and phylogeny in assembly of tropical forest communities in Danum Valley, Sabah." Thesis, University of Aberdeen, 2016. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=231264.

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Tropical forests have been studied by community ecologists since the earliest days of the field because of their diversity and complexity and much of the theory behind community assembly has been developed in the tropics. However, the processes that act to assemble species in tropical forest across a very fine scale are still poorly understood. This study investigates community structure in 20ha area of hyper diverse tropical rainforest in Sabah, Malaysia. In order to examine community phylogenetic structure, I reconstructed a molecular phylogeny for all species in the study site using DNA bar

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22

Chapman, Julia I. "Temporal Dynamics and Patterns of Diversity in Old-growth Forest Tree Communities." University of Dayton / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1543505087017919.

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23

Pu, Zhichao. "The assembly of protist communities: Understanding drivers of historical contingency and causes and consequences of biodiversity." Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/54901.

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Understanding mechanisms regulating the assembly of ecological communities is a major goal of community ecology. I combined experimental and theoretical approaches to investigate the influences of various ecological factors on the assembly of protist communities. My research included three experimental studies and one theoretical study. Two experimental studies used freshwater heterotrophic ciliated protists as model organisms to examine how species dispersal across local communities and functional and phylogenetic diversity of the species pool influence historical contingency of the assembled

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Ojima, Miriam Nozomi. "APPLICATION OF ECOLOGICAL THEORIES TO THE GUT MICROBIOME AND BIFIDOBACTERIAL COMMUNITIES." Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/263793.

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Gómez, Jesús Enrique. "Role of spatial and temporal vegetation heterogeneity from fire-grazing interactions to the assembly of tallgrass prairie spider communities." Diss., Kansas State University, 2017. http://hdl.handle.net/2097/34672.

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Doctor of Philosophy<br>Department of Biology<br>Anthony Joern<br>North American tallgrass prairie is a dynamic ecosystem that evolved with variable regimes of fire and grazing interactions (pyric herbivory), and variable mid-continental weather. Combined, these ecological factors create a shifting mosaic of plant communities that create heterogeneous and structurally complex habitats that move around across the landscape in time and space. The overarching goal of my dissertation was to study how bottom-up habitat templates created in response to fire-grazing interactions influence the communi

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Gamboa, Badilla Nancy. "The role of species niche, species dispersal and landscape factors in the assembly of novel woody communities in metropolitan Mediterranean regions." Doctoral thesis, Universitat de Barcelona, 2017. http://hdl.handle.net/10803/462039.

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Biological diversity in a global scale has been threaten seriously by anthropogenic disturbances in ecosystems. Changes in land cover and land use affect biodiversity, causing habitat loss and species extinction, or colonization and establishment of new communities. Such effects could happen in an outdated way between the time of the disturbance and species extinction or colonization. Landscape history, connectivity between habitat fragments and the dispersion of organism, shapes species diversity and influences extinction and colonization process. On the other hand, exotic plant invasion coul

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Chen, Ting-Wen [Verfasser], Stefan [Akademischer Betreuer] Scheu, Stefan [Gutachter] Scheu, and Holger [Gutachter] Kreft. "Assembly processes in soil animal communities: Integrating phylogeny and trait-based approaches / Ting-Wen Chen ; Gutachter: Stefan Scheu, Holger Kreft ; Betreuer: Stefan Scheu." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2018. http://d-nb.info/1154307476/34.

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Rott, Matthias [Verfasser], Paul [Akademischer Betreuer] Schulze-Lefert, Martin [Akademischer Betreuer] Hülskamp, and Allan [Akademischer Betreuer] Downie. "Structure and assembly cues of Arabidopsis root-inhabiting bacterial communities and comparative genomics of selected Rhizobium members / Matthias Rott. Gutachter: Paul Schulze-Lefert ; Martin Hülskamp ; Allan Downie." Köln : Universitäts- und Stadtbibliothek Köln, 2012. http://d-nb.info/1038485975/34.

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Lewis, Andrew J. "The Ecology of Carrion Decomposition: Necrophagous Invertebrate Assembly and Microbial Community Metabolic Activity During Decomposition of Sus scrofa Carcasses in a Temperate Mid-West Forest." University of Dayton / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1321394833.

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Friederici, Nicolas. "Innovation hubs in Africa : assemblers of technology entrepreneurs." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:2e5c9248-15b4-450a-958a-0ce87cf6e263.

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Innovation hub organizations - or 'hubs' - have become a prevalent form of support for technology entrepreneurship in Africa. About 170 African hubs have been established, most since 2010. Practitioners have argued either that hubs are transformative network infra-structures for Africa's fledgling digital economy or that they are ineffective business incubators. This thesis steps back from this debate about whether hubs work. Instead, it asks how African hubs work, specifically how they shape relationships of technology entrepreneurs. Literature on intermediation and incubation is reviewed to

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Vallée, Vincent. "Changements à long terme de la structure et de la diversité des peuplements de poissons de fond du plateau continental de Guyane Functional richness and turnover patterns reveal assembly rules structuring marine fish communities on the continental shelf of French Guiana Diversity recovery and temperature induced species shift in tropical marine fish communities after a trawling fishery collapse Local and regional assembly rules on a long time period in marine fish communities on the continental shelf of French Guiana." Thesis, Guyane, 2020. http://www.theses.fr/2020YANE0004.

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Dans le contexte actuel de surpêche et de réchauffement climatique, il est nécessaire d’adopter une gestion écosystémique des ressources halieutiques. Ce travail de thèse apporte des éléments de réponse à cette problématique en se penchant sur le cas de la pêcherie crevettière guyanaise et de son impact sur les communautés de poissons associées. Comme dans la plupart des régions tropicales, les eaux côtières de Guyane se sont réchauffées d’environ 1°C entre 1990 et 2017. En revanche, comme dans peu d’endroits au monde, la pression de pêche s’est quasiment effondrée sur cette même période. Ce c

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Haug, Ashley Sagers. "Diversity and Abundance of the Dark Kangaroo Mouse, Microdipodops megacephalus, in Communities of Nocturnal Granivorous Rodents in Western North America." BYU ScholarsArchive, 2010. https://scholarsarchive.byu.edu/etd/2404.

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The dark kangaroo mouse, Microdipodops megacephalus, is a sensitive species in the Great Basin Desert. This thesis explores the structure of desert rodent communities of the Great Basin to better understand M. megacephalus' place in the community and the conditions that promote large and stable populations. To determine community structure, I used nestedness analysis to evaluate 99 communities of nocturnal granivorous rodents. I found that the community structure was non-random, indicating the existence of assembly rules and ecological constraints. I also found that M. megacephalus was the sec

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Caballero, López Berta. "La diversitat d'artròpodes als agro-ecosistemes: efectes del paisatge, la gestió agronòmica, i la composició de la flora arvense = Arthropod diversity in agro-ecosystems: the effects of landscape, management and assembly of weed communities." Doctoral thesis, Universitat de Barcelona, 2010. http://hdl.handle.net/10803/670836.

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La agricultura ecológica se ha planteado como una posible solución paliativa a las negativas consecuencias de la intensificación agrícola. Aunque los beneficios de una agricultura más sostenible y menos intensiva son claros para la flora arvense de los campos de cereales gestionados ecológicamente, no son tan obvios para grupos de artrópodos oportunistas como son los pulgones que pueden ocasionar grandes pérdidas económicas, ni para sus enemigos naturales. Los estudios que abordan el tema de planta-artrópodo son escasos y frecuentemente se ciñen a evaluar las abundancias de ciertos grupos en v

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Garrouj, Myriam. "Restauration écologique des prairies alluviales par transfert de matériel biologique : importance des premières étapes sur les trajectoires des communautés végétales." Thesis, Bordeaux, 2019. http://www.theses.fr/2019BORD0345.

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Les prairies humides alluviales abritent une faune et une flore originales et diversifiées du fait de leur hétérogénéité spatio-temporelle et apportent de nombreux services aux êtres humains (services écosystémiques).Pourtant, ces milieux qui résultent d’activités agricoles traditionnelles sont soumis à divers types de menaces, telles que l’urbanisation ou l’intensification des activités agricoles, associées au drainage ou à la mise en culture et au labour. Ces écosystèmes sont également soumis à des modifications des processus de dispersion des espèces. Dans un contexte de régression des zone

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Rezki, Samir. "Structuration, dynamique et réponse des communautés microbiennes associées aux graines lors de la transmission d'agents phytopathogènes Assembly of seed-associated microbial communities within and across successive plant generations Differences in stability of seed-associated microbial assemblages in response to invasion by phytopathogenic microorganisms." Thesis, Angers, 2017. http://www.theses.fr/2017ANGE0092.

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La graine constitue le point de départ du cycle d’une plante et abrite une diversité de micro-organismes qui peuvent impacter négativement ou positivement la fitness de la plante. De plus, la graine permet la dispersion et la survie des agents phytopathogènes entre deux cycles de culture de la plante hôte. Dans ce contexte, l’objectif de ce travail était de : (i) décrypter les processus écologiques impliqués dans l’acquisition du microbiote des graines, (ii) analyser sa réponse à l’invasion par des agents phytopathogènes et(iii) suivre sa dynamique durant la germination de la graine et l’émerg

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Deleglise, Claire. "Hétérogénéité spatiale des composantes spécifiques et fonctionnelles des communautés prairiales subalpines dans un contexte de déprise pastorale." Phd thesis, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00609989.

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L'hétérogénéité spatiale est aujourd'hui reconnue comme un facteur primordial pour la diversité et le fonctionnement des écosystèmes prairiaux, mais reste souvent négligée dans l'analyse de l'impact de différents modes d'utilisation pastorale. Les communautés prairiales subalpines sont des milieux hautement diversifiés, au cœur d'enjeux écologiques, socio-économiques et culturels. Depuis plusieurs décennies, des changements d'usage, notamment l'extensification conduisant parfois à l'abandon du pâturage, affectent ces prairies dans de vastes régions des Alpes. Connaitre la réponse spatiale de c

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Van, Gray Jonathon B. "Disturbance effects on assembly and recovery dynamics of freshwater microbial biofilm communitieis." Kent State University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=kent1556556989587688.

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Alfonsi, Elsa. "Processus d’assemblage des communautés végétales dans les zones humides de Gironde : du diagnostic aux services écosystémiques." Thesis, Bordeaux, 2016. http://www.theses.fr/2016BORD0092/document.

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Les zones humides sont des écosystèmes dynamiques en perpétuel changement, dans le temps et dans l'espace et demeurent parmi les plus menacés au monde. Ce travail de thèse est une contribution à la connaissance et la conservation des zones humides. Nous avons étudié la végétation de différents milieux, appartenant à un réseau de zones humides de Gironde, allant des landes humides aux prairies alluviales. Nous les avons choisies pour leur intérêt patrimonial et les enjeux de gestion qu'elles représentent dans le département. Nous avons utilisé plusieurs approches descriptives et expérimentales.

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Fichaux, Mélanie. "Structuration des communautés de fourmis de la litière en forêt guyanaise." Thesis, Guyane, 2018. http://www.theses.fr/2018YANE0005/document.

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L’objectif général de cette thèse est de déterminer le rôle de l’exclusion compétitive, du filtrage environnemental et des limites de dispersion dans la distribution des espèces de fourmis de la litière en forêt guyanaise. Pour cela, nous avons évalué comment la diversité des assemblages de fourmis varie le long de gradients environnementaux et géographiques, en considérant les trois facettes de la diversité (i.e. taxonomique, phylogénétique et fonctionnelle) à différentes échelles spatiales. Des patrons observés de structure fonctionnelle et phylogénétique plus faibles qu’attendus au hasard s

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Tarantino, William J. "Effects of Adaptive Foragers on the Diversity and Functioning of Assembled Model Communities." W&M ScholarWorks, 2008. http://www.vims.edu/library/Theses/Tanantino08.pdf.

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Kuczynski, Lucie. "Réponses des communautés piscicoles aux changements globaux : patrons et processus." Thesis, Toulouse 3, 2017. http://www.theses.fr/2017TOU30206/document.

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La description des gradients spatiaux ainsi que la documentation des dynamiques temporelles de la biodiversité sont des piliers centraux de l'écologie moderne, en particulier dans le contexte actuel des changements globaux auquel l'intérêt porté est croissant depuis les dernières décennies. Les communautés écologiques sont désormais reconnues comme des entités issues de la sélection d'espèces à partir d'un pool régional, sélection déterminée par différents processus appelés règles d'assemblage. Les deux règles d'assemblage principalement reconnues sont les filtres environnementaux, sélectionna

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Barbe, Lou. "Conséquences de l'assemblage des communautés végétales sur la décomposition de leur litière." Thesis, Rennes 1, 2017. http://www.theses.fr/2017REN1B040/document.

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Au cours de son assemblage, une communauté végétale va subir de nombreux changements : immigration de nouvelles espèces de plantes possédant de nouveaux traits, disparition de certaines espèces de plantes avec d’autres traits, immigration de nouveaux organismes associés aux plantes (insectes, champignons…), changements de traits chez les espèces présentes… Tous ces changements sont susceptibles de modifier la décomposition de la litière produite par la communauté végétale. En effet, la décomposition de la litière est gouvernée par les traits des espèces végétales, par l’activité des organismes

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Weber, Stefan. "Evidence for flower mediated assembly in spring ephemeral undersoty communities." Thesis, 2011. http://hdl.handle.net/10214/2869.

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Plants with similar traits compete for resources. If related taxa share similar traits, phylogenetic relationships may predict competitive outcomes. Although plants compete for pollinators, flowers are rarely considered in community-assembly theory. I tested the hypothesis that plant communities are structured by competition for pollination. I inventoried communities at three spatial scales, measured seven flower traits, and tested the observed patterns against those generated by a null model to judge if community members were more or less similar in floral traits than expected by chance. I

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Thompson, Terrie Lynn. "Assembly required: self-employed workers' informal work-learning in online communities." Phd thesis, 2010. http://hdl.handle.net/10048/1252.

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It seems that for many people, spaces on the web are an integral part of their lives. This may include seeking out learning opportunities in online communities. There is plenty of buzz about these cyberspaces whether they are part of new social media configurations or commercialized product-related spaces cultivated by enterprises. It is important to explore how online spaces mayor may notcreate new locations of educational possibilities for workers. The subtle, and sometimes not so subtle, fusion of these technologies into work-learning practices warrants attention. This research project fo

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Mucciarelli, Valerie. "Community assembly in subtidal macroalgal communities: The importance of environmental gradients." Thesis, 2014. http://hdl.handle.net/1828/5302.

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As human activity along coastlines increase, degradation and destruction of coastal marine ecosystems around the globe will increase at an alarming rate. In an effort to mitigate degradation and destruction of coastal marine ecosystems, artificial reefs have been used in restoration and enhancement projects. As artificial reefs are the main method of restoring diversity to a degraded area, it is important to know the mechanisms that drive marine community assembly and diversity on those reefs. Understanding community assembly patterns of foundational species, in particular, may provide insi

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Chen, Ting-Wen. "Assembly processes in soil animal communities: Integrating phylogeny and trait-based approaches." Doctoral thesis, 2018. http://hdl.handle.net/11858/00-1735-0000-002E-E372-9.

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Weeks, Brian. "Reconstructing community assembly: the impacts of alternate histories on contemporary ecology." Thesis, 2017. https://doi.org/10.7916/D8ZS37TF.

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The complexity of ecological and evolutionary processes that govern species distributions has long presented a challenge to understanding community assembly history. The work presented here develops a conceptual framework for integrating phylogenetics and biogeography to reconstruct the assembly of communities, provides empirical support for the broad applicability of this framework, tests whether morphology can serve as a proxy for behavioral ecology, and develops a novel metric of assemblage vulnerability and shows how vulnerability is related to biogeographic history. This dissertation demo

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Fukami, Tadashi. "Species diversity and assembly history in ecological communities microcosm experiments and computer simulations /." 2003. http://etd.utk.edu/2003/FukamiTadashi.pdf.

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Thesis (Ph. D.)--University of Tennessee, Knoxville, 2003.<br>Title from title page screen (viewed Sept. 23, 2003). Thesis advisor: James A. Drake. Document formatted into pages (ix, 119 p. : ill.). Vita. Includes bibliographical references (p. 115-118).

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Weißbecker, Christina. "Biodiversity and assembly processes of soil fungal communities in Chinese subtropical forests with variable tree diversity." 2019. https://ul.qucosa.de/id/qucosa%3A38432.

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Bino, George Ashish. "Eco-evolutionary dynamics of microbial communities with heterogeneous growth and dispersal." Thesis, 2020. https://hdl.handle.net/2144/41998.

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Understanding eco-evolutionary dynamics in cancer tumors, species invasions, and the human microbiome is vital for numerous health and economic applications. However, spatial structure and population heterogeneity make this challenging. This dissertation tackles these challenges using a population dynamics approach, wherein systems evolve through individual growth and dispersal. The bulk of this dissertation studies expanding populations, such as growing microbial colonies, species range expansions, and cancer tumors. In this context, I first study the effect of a directional bias in dispe

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