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 26 for “"macroevolution"”.
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Comparative Morphology and Macroevolution of the Avian Quadrate
… Collectively, our results suggest a complex macroevolutionary scenario in which quadrate morphology evolved jointly with other elements of the avian kinetic system. With the knowledge of quadrate morphologies in crown birds, we plan to apply this explicitly quantitative framework to avian …
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Developing and applying supertree methods in Phylogenomics and Macroevolution
Supertrees can be used to combine partially overalapping trees and generate more inclusive phylogenies. It has been proposed that Maximum Likelihood (ML) supertrees method (SM) could be developed using an exponential probability distribution to model errors in the input trees (given a proposed …
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Macroevolution and phylogenomics in the adaptive radiation of Heliconiini butterflies
The recognition of ecological speciation and hybridisation as key components of speciation has led to a major shift in evolutionary biology over the last decade. The mimetic Heliconius butterflies of the Neotropics have served as a prominent example of both, although the vast majority of studies …
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The legacy of macroevolution: understanding and predicting evolutionary responses to novel environments
… to the same environmental pressures. Studying macroevolution of morphological traits and changes in microhabitat usage allows us to investigate the roles of these processes in generating variation in response to different habitats, and accounting for scale allows us to gain a more holistic …
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Total evidence phylogeny of ducks, geese and swans(family Anatidae): implications for macroevolution andbiogeography
… used to reconstruct the evolution ofselected macroevolutionary traits (e.g., volancy versus non-volancy, diet, sexual system) and the biogeographical history of anatids, the results show that certain traits; particularly diet, characterize certain clades, such as the piscivorous mergansers and …
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Morphometric Theory and Application to Evolution and Biogeography in Argopecten (Bivalvai: Pectinidae) From the Southeastern United States
… Pleistocene glaciations. That speciation mirrors macroevolution suggests self-similarity in evolution. Convergence on circular disk shape (a local maximum of swimming efficiency) seen in numerous pectinid lineages implies adaptative evolution and precludes genetic drift.
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Systematics of Ficinia clade (Cyperaceae)
… the phylogenetic relationships and patterns of macroevolution in Ficinia clade; to estimate the divergence dates and investigate the role of ecology the speciation of sister species of the genus Ficinia; and to revise the taxonomy of the species in the Ficinia indica complex (F. indica, F. …
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The ecological and evolutionary drivers of spatial biodiversity patterns
… from the tool kits of community ecologists, macroevolutionists, and biogeographers, we can delve into the complexities shaping diversity patterns and get a more holistic understanding of their origin and maintenance. In my opening chapter I briefly summarise the state of the field and …
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The ecological and evolutionary drivers of spatial biodiversity patterns
… from the tool kits of community ecologists, macroevolutionists, and biogeographers, we can delve into the complexities shaping diversity patterns and get a more holistic understanding of their origin and maintenance. In my opening chapter I briefly summarise the state of the field and …
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Small mammal faunal stasis in Natural Trap Cave (Pleistocene-Holocene), Bighorn Mountains, Wyoming
… one with ramifications for the general study of macroevolution. The predominant viewpoint is that communities are ephemeral objects during the Quaternary that easily fall apart, but evidence exists that suggests geography and spatial scale plays a role. Natural Trap Cave is a prime testing ground …
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Genetic Diversity And Evolution Of Disease Response Genes In Sorghum Bicolor L. Moench And Other Cereals
… intraspecific polymorphism. Here we compare the macroevolution and intraspecific polymorphism of positively selected disease response genes and show that the patterns of polymorphism found are consistent with both selective sweeps and balancing selection. The sorghum mlo homolog and SESPY, have …
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A Morphological and Phylogenetic Comparative approach to investigating Branching Architecture Evolution in Monocots A Dissertation
… more mechanistic-based explanations for how macroevolution took place.
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Evolution of Axial Skeleton Diversity across Reptilia
… uncovering similar complexity in axial skeleton macroevolution across other vertebrate clades, and Vertebrata as a whole.
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Skeletal evolution and convergence in the hyperdiverse passerine radiation
… for future work investigating passerine macroevolution and constitutes an important step in broadening our understanding of how passerines became so spectacularly diverse.
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Identifying genetic variation in candidate genes for heat stress and association thereof with growth performance in dusky kob (Argyrosomus japonicus)
… firstly, to briefly assess and compare the macroevolution of six candidate heat stress genes to the species' 'neutral' evolution (modelled using full mitochondrial genome data from 18 different finfish species, with about half of them being from the family Sciaenidae). Secondly, from a …
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On the Distribution of Genetic Variation in Ecological Communities
… (e.g. macroecology, comparative phylogeography, macroevolution) using tools and data that tend to focus on only one axis of community scale data (e.g. phylogenies, relative abundances, and/or trait information). Yet we know that there are feedbacks among processes that respond on short, medium, …
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Traits and Trees: Exploring the edges of phylogenetic methods
Phylogenetic methods are central to the study of biology and in recent years more formal techniques involving computational methods have been developed and widely applied. While these have focused on building the Tree of Life from molecular data, other approaches have extended to phenotypes, …
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Ecological and evolutionary consequences of worker morphological variation in ants (Hymenoptera: Formicidae)
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2024-12-01
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Exploring the Soft Tissue of the Archosaurian Feeding System through Evolutionary and Developmental Temporal Space
… organisms and address broader morphological macroevolution questions. This dissertation focuses on the construction and ontogenetic changes in the soft tissue (i.e., jaw muscles and keratinous sheath or rhamphotheca) and skeletal morphology of the avian edentulous feeding system and apply it …
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From Micro to Macro: Investigating mechanisms involved in the convergent evolution of feather lice ecomorphs
… in a host-parasite system from a micro and macroevolutionary perspective. Parasitic feather lice in the family Philopteridae (Order: Psocodea) are found on almost all species of birds and have repeatedly diversified into ecomorphs specific to areas of their host's body. These morphological …
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