Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 158 for “"Functional Diversity"”.
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Size fractionation of bacterial functional diversity within soils
… GN and GP microtitre plates were used to compare functional diversity of large (>0.45 mum, LC) and small (<0.45 mum, SC) cells within A and B horizons of cultivated and forested Guernsey silt-loam soil without enrichment and following enrichment in dilution culture. Without enrichment, SC …
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Investigation of regulatory and functional diversity in an enzyme superfamily
Understanding the evolution of functional and regulatory diversity in enzyme superfamilies addresses a fundamental biochemical problem by improving our ability to identify and exploit structure/function relationships. It opens up the possibility of engineering naturally occurring enzymes and …
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Disturbance, Functional Diversity and Ecosystem Processes: Does Species Identity Matter?
… and ecosystem processes. Additionally, plant functional diversity has been suggested as the key to ecosystem processes such as productivity and nutrient dynamics. I investigated how disturbance and functional composition both singly and in combination affect vegetation dynamics, soil …
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An Experimental Approach to Teaching the Concept of Functional Diversity.
… approach to use in teaching the concept of functional diversity. The project culminated in a laboratory exercise for use in high schools.</p><p>Experimental design consisted of representatives of three functional groups of plants, (legumes, grasses, and forbs), planted singly, and in two, or …
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Plant Species and Functional Diversity along Altitudinal Gradients, Southwest Ethiopian Highlands
Understanding how biodiversity is organized across space and time has long been a central focus of ecologists and biogeographers. Altitudinal patterns of richness gradients are one of such striking patterns in the landscape. Despite its historical and ecological importance as a heuristic natural …
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Functional diversity and life history traits of arbuscular mycorrhizal fungi in disturbed soils
Relative effectiveness of ten species of arbuscular mycorrhizal fungi native to a revegetated coal strip mine site was tested on red clover against a non-mycorrhizal control and against inocula of two commercial isolates. Most (70%) of the isolated species in a native fungal community were as …
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T Cell Responsiveness Through the Ages: Functional Diversity of Age-Dependent Antiviral Responses
… exhibited transcriptional similarity, termed functional redundancy. This similarity was repair-associated, and a defining gene of the transcriptional profile was amphiregulin (AREG). When quantified, T cells from subjects with a viral lower respiratory tract infection (LRTI) that did not …
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FUNCTIONAL DIVERSITY OF FUNGI ASSOCIATED WITH DURUM WHEAT ROOTS IN DIFFERENT CROPPING SYSTEMS
… pea and chickpea crops through changes in the functional diversity of wheat root fungi. The effect of fungicides used on chickpea on the root fungi of a following durum wheat crop was studied using plate culture and pyrosequencing. Pyrosequencing detected more Fusarium spp. in the roots of …
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Functional diversity and bilobe targeting by the MORN Domain Proteins of Leishmania major
… repeats, while the remaining 7 carry additional functional domains. The strategy was to express two apparently varied LmaMORNs (LmaMORN5 and LmaMORN6) from each other and from MORN1 in L. major promastigotes, screen them for bilobe localization and investigate their possible function. I showed …
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Spiders on lowland heath: Functional diversity and abundance in relation to heathland structure
… and fragmentation has had negative effects on biodiversity worldwide. The Dorset Heathlands, despite historical changes and drastic losses, are home to some of the rarest species in the UK. The dominant plants, ericaceous shrubs, vary in structure according to age, creating a heterogeneous …
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Tree functional diversity affects litter decomposition and arthropod community composition in a tropical forest
… recovery from disturbance alters species- and functional diversity, which in turn can modify decomposition processes and affect ecosystem carbon and nutrient cycling. Despite numerous studies on tropical litter decomposition, the links among plant- and invertebrate diversity and microbial …
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The macroecological distribution of avian functional diversity: environment, extinction risk and protected area coverage
… or near-threatened. Consequences of biodiversity loss for ecosystems depend on community composition rather than simply species richness, hence interest in functional diversity (FD) - variety of traits that influence ecosystem functioning – has increased. This thesis uses a global set of …
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Effect of Population Sources and Species Pools on Community Phylogenetic and Functional Diversity During Restoration
<p>Phylogenetic and functional perspectives of community assembly can reveal new insights into how variation within dominant species interact with the local species pool to influence the structure of restored plant communities. Many studies have examined the effect of dominant species and species …
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Divergent Evolution of Enzymes in the Crotonase Superfamily: Exploring Functional Diversity and Challenging Mechanistic Paradigms
… experiments, the possibility of an additional functional group---namely, the gamma-carboxylate of the substrate---carrying out this catalysis cannot be ruled out. HICH was shown to catalyze the hydrolysis of a thioester bond to yield hydroxyisobutyryl-CoA. It was shown the mechanism of HICH did …
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Functional diversity enhances detection of ecosystem stability and resolution of predator-prey interactions within a multitrophic community
… factors that contribute to the decline of biodiversity which in turn has a negative impact on ecosystem function. There has been growing interest in understanding diversity’s role in the mechanisms behind ecosystem resilience with much attention focusing on how functional diversity, or the …
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Functional diversity and mowing regime of flower strips as tools to support pollinators and to suppress weeds
… during past decades is one of the causes of biodiversity declines. Ecological intensification has been proposed as a more sustainable alternative of intensive agriculture that should be able to fulfill worldwide demands of food, by optimizing ecosystem functions and services and reducing …
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From Fossils to Function: Exploring the Evolutionary And Functional Diversity Of HERV Envelope Proteins Across Primate Lineages
… of the project was to characterize in detail env diversity across primate species, to characterize their acquisition and evolutionary dynamics within the host genome and gain insights about their past and residual coding potential, to subsequently investigate the tropism of ancestral and current …
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Functional diversity of fungal symbiont communities and the impact of biotic and abiotic factors on their composition and assembly
… the processes generating and maintaining functional diversity in this key group of plant symbionts. I found that fungal endophyte communities are comprised of phylogenetically distinct assemblages of slow- and fast-growing fungi that differ in their use and growth on differing carbon …
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