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 77 for “"ecotypes"”.
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Otolith-based discrimination of cod ecotypes and the effect of growth rate
Kvarnalögun hefur áður verið notuð til greiningar vistgerða innan íslenska þorskstofnsins og sterkra áhrifa vaxtarhraða á kvarnalögun ítrekað gætt í ýmsum tegundum fiska. Með það markmið að rannsaka áhrif vaxtarhraða á tengsl kvarnalögunar og vistgerða þorsks (skilgreindar með breytileika á Pan I …
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Investigating the variation in susceptibility between Arabidopsis thaliana ecotypes in response to Botrytis cinerea infection
… in resistance found across the many Arabidopsis ecotypes, which provides researchers with a rich resource to dissect the molecular basis of resistance (or susceptibility) to a given pathogen. In this study, the resistance of three Arabidopsis ecotypes (Col-0, RLD and No-0) to the necrotrophic …
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Plasticity, Intraspecific Variability and Local Adaptation to Climatic Extreme Events of Ecotypes/Provenances of Key Plant Species
… the selective use of plant provenances or ecotypes may help to make ecosystems climate-resilient without a potentially more problematic introduction of exotic species. Especially provenances from warmer, drought-prone regions, with a current climate similar to the projected one for Central …
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The genetics of parallel evolution: a case study using thermal and non-thermal ecotypes of Mimulus guttatus from Yellowstone National Park
Understanding the genetic mechanisms of adaptation has long been a goal of evolutionary biologists. However, the predictability of genetic change across adaptive events and the patterns observed during adaptive transitions across species remain poorly understood. Numerous parallel evolutionary …
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The genetics of parallel evolution: a case study using thermal and non-thermal ecotypes of Mimulus guttatus from Yellowstone National Park
Understanding the genetic mechanisms of adaptation has long been a goal of evolutionary biologists. However, the predictability of genetic change across adaptive events and the patterns observed during adaptive transitions across species remain poorly understood. Numerous parallel evolutionary …
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CHARACTERIZATION OF TWO METAL TRANSPORTERS HMA3 AND NRAMP1 IN TWO ECOTYPES OF THE ZN/CD HYPERACCUMULATOR THLASPI CAERULESCENS COMPARED WITH ARABIDOPSIS THALIANA
… non-accumulator (Arabidopsis thaliana L) and two ecotypes (Prayon and Ganges) of the hyperaccumulator Noccaea caerulescens (formerly= Thlaspi caerulescens). The full cDNA of an ortholog of either Nramp1 or HMA3 was expressed in yeast in order to provide a heterologous model to elucidate how …
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Ploidy and Ecophysiology analysis of the Arenaria ciliata L. complex (Caryophyllaceae) in Europe
… also indicates there are likely to be many local ecotypes across the fragmented distribution. The aim of this project was to better understand the biology of Arenaria ciliata species complex, in terms of whether and how these species respond to various environments, measured for 5 ecotypes from …
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Characterization of juvenility and photoperiodic responses of Rudbeckia hirta originating from different latitudes
… sensitivities to photoperiod. Seven R. hirta ecotypes originating from latitudes ranging from 30.l0oN to 45.l0oN were exposed to long days (LD) at different leaf numbers to determine juvenile phase length and speed of floral initiation. Ecotypes from northern latitudes had fewer leaves at …
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TROPHIC ECOLOGY OF JUVENILE LEAN AND SISCOWET LAKE TROUT (SALVELINUS NAMAYCHUSH) FROM U.S. WATERS OF LAKE SUPERIOR
… niches of juvenile Lean and Siscowet Lake Trout ecotypes across six ecoregions of Lake Superior. Spatially, Lean and Siscowet were observed in overlapping depth distributions. Leans were most abundant in shallow waters (60m). The greatest levels of cohabitation were observed in waters from …
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Molecular Basis of Calcicole-Calcifuge Physiology.
… levels of rhizospheric Ca2+. In this study, six ecotypes of A. thaliana, comprising two putative wild calcifuges (Glenisla and Penicuik), two putative wild calcicoles (Halifax and Elland) collected from varyingly calcareous regions around UK, and two lab grown ecotypes (Col-4 and Cal-0) were …
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Ecology, diversity and comparative genomics of oceanic cyanobacterial viruses
… and genetically distinct groups (termed "ecotypes" in Prochlorococcus). Cyanobacterial viruses (cyanophages) that infect Synechococcus are abundant (to 104-106 phage ml-1) in the oceans and calculations suggest that they play a small but significant role in host mortality. Cyanophages are …
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Effect of Population Sources and Species Pools on Community Phylogenetic and Functional Diversity During Restoration
… phylogenetic structure over time. Local ecotypes decreased the abundance of closely related eudicots, monocots and volunteer species more than cultivars. However, population sources did not affect ecologically conservative species (i.e. species with intermediate-to-poor ecological …
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Parasite abundance in Atlantic cod (Gadus morhua) in shallow and deep waters around Iceland
… two stocks there are also coastal and frontal ecotypes which inhabit different depths during the feeding season. Today these ecotypes are detected by molecular sequencing but here I show that parasites as biological tags might be a useful method in cod ecotype identification since results …
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Plant growth responses to winter climate change: from amongand within-species variation to plant-soil interactions
… growth differences in the responses of species, ecotypes and plant functional groups to winter processes impacted by warmer temperatures. Therefore, experiments were carried out to simulate winter warming and to study its effects on cold acclimation and deacclimation, dormancy loss and frost …
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The individual and collective behavior of social organisms across environments
… and social networks between two stickleback ecotypes, the “common” type that exhibits typical paternal care and the “white” ecotype where paternal care is significantly reduced. I found that the white ecotype is bolder than the common ecotype. There were also social network differences, with …
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Developing Production Techniques and A Site Assessment Tool for Forest Farmed Ramps in Appalachia
… particularly examining best-suited ramp ecotypes, mycorrhizal treatment, and habitat suitability determination. In the first study, bulbs and seeds from diverse Appalachian locations were gathered and transplanted to a common experimental site to investigate the effects of different ramp …
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When do propagules matter? The role of ecological filters and regeneration dynamics during community assembly in tallgrass prairie restorations
… between communities sown with cultivar and local ecotypes of the dominant grasses but differed among sown species pools in prairie restored with cultivars but not local ecotypes. Number of emerged seedlings also differed among species pools, but only in communities sown with local ecotypes of the …
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Morphometric Approaches to Analysis of Microevolution: Morphologic Variation in Paleozoic Bryozoa
… gracile through time, but populations are not ecotypes tracking favorable environmental conditions. Characters describing zooidal living chambers contribute more to the discrimination of populations through time, and shifts occur in interdependent character responses. Unidirectional temporal …
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Iron and Prochlorococcus/
… of two closely-related Prochlorococcus ecotypes. MED4 is adapted to high-light environments while MIT9313 lives best in low-light conditions. We determined that MIT9313 is capable of surviving at low iron concentrations that completely inhibit MED4. Furthermore, concentrations of Fe' …
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