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.
Results
Showing 1 to 20 of 23 for “"representative species"”.
-
Developing Habitat Suitability Criteria for Individual Species and Habitat Guilds in the Shenandoah River Basin
The diversity of fish species found in warmwater stream systems provides a perplexing challenge when selecting species for Instream Flow Incremental Methodology (IFIM) studies. An often-suggested approach has been to use habitat guilds to incorporate the diversity found in these systems. My goal is …
-
The functional morphology of insect adhesive devices and its implications for ecology
… focusing on hymenoptera and coccinellids as representatives of the two basic insect pad types. In the following chapters we test the four leading hypothesis regarding insect adhesion (Contamination, Fluid absorption, Surface roughness and the effect of Surface Energy), before investigating …
-
Evolution of floral morphology in Brunsvigia and Crossyne (Amaryllidaceae)
… their floral and inflorescence structures. The species Brunsvigia bosmaniae and Crossyne flava are chosen as representative species of the two genera Brunsvigia and Crossyne. Floral morphology is studied in relationship to an outgroup species Nerine humilis. Pollination syndrome, ability to …
-
THE EVOLUTIONARY DEVELOPMENT OF CROWN GALLOANSERAE SKULLS: TRACKING CHANGES IN GALLIFORM AND ANSERIFORM CRANIAL DEVELOPMENT
… gap, I compared skull formation and growth in representative species of Galloanserae from initial skull ossification to the adult stage. I began by constructing robust morphology-based staging criteria for nearhatching embryos of two species of anseriforms, mallard duck (Anas platyrhynchos) and …
-
Ocorrência de Gerreidae (Osteichthyes, Perciformes) no canal de Camboatá, sistema lagunar de Itaipu-Piratininga, RJ: abundância relativa e cronologia alimentar
… paper contributes to the knowledge of Gerreidae species participation in tropical lagoon environments, with special reference to the Camboatá channel that interconnects the lagoon system Itaipu-Piratininga. The main objective being the analysis of the temporal distribution, the feeding chronology …
-
The direct implications of warming on the phenotype and underlying functional traits of marine phytoplankton
… may be altered. Focusing on patterns in species functional traits (FTs), this thesis applied trait-based approaches in laboratory and field studies to explore how biogeochemically-related FTs vary over environmental gradients. I quantified the thermal performance curves (TPCs) of FTs in …
-
Combustion simulations in Diesel engines using reduced reaction mechanisms
… radiation. Ignition was tracked by means of a representative species (here CO), whose concentration remains small during the ignition period and which shows an increase at ignition. Its reaction rate was obtained from a detailed mechanism and combined with a presumed probability density …
-
Are forests restricted by nutrient poor soils? : an analysis of soil nutrient stocks and associated vegetation in the fynbos biome, South Africa
… lower nutrient stocks than indigenous fynbos species. The study was conducted in the Orange Kloof Forest Reserve and Jonkershoek Nature Reserve within the Western Cape (South Africa). Soil, wood and leaf samples of representative species were collected from indigenous forest, fynbos, E. …
-
Assessment of the effects of impingement and entrainment on the fish community of the New River, Virginia
… estimated total impingement was 6219 fish of 22 species. The alewife (Alosa pseudoharengus) accounted for 86.6% of the fish; most of these were impinged during the winter probably as a result of cold induced mortality in an upstream reservoir population. The estimated numbers of other species …
-
Long Term Hydrologic Effects on Stream Health from Residential Development Patterns
… habitat available for three habitat guild representative species was evaluated for each scenario. The results indicated that increased development would lead to a substantial reduction in available riffle species habitat (represented by the fantail darter) and a moderate reduction in run …
-
Environmental Cues in the Seasonal Development of the Southern California Annual Grassland
… which provide for the coexistence of various species by allowing them to make their major demands upon environmental resources at different times. Thus, an ecosystem furnishing certain resources at a limited rate is enabled to support a larger total biomass.</p> <p>The grasslands of southern …
-
High pressure liquid chromatography of nucleotides and nucleic acid bases from fungi
… nucleotide pools at the nanogram level in four representative species of ascomycetes (P. citrinum, A. niger, F. moniliforme, and C. herbarum). Nucleotides were extracted from the mycelial mat in high yield with 10% (weight/volume) trichloroacetic acid, and then preseparated from interfering …
-
Diencephalic asymmetries: morphological, immunohistochemical and ultrastructural analysis of habenular nuclei in elasmobranchs and teleosts
… (Concha M. L. and Wilson S. W., 2001). In representative species of almost all classes of Vertebrates the habenular nuclei are asymmetric, both in terms of size and of neuronal and neurochemical organization, although different types of asymmetry follow different evolutionary courses. …
-
Phylogeny and chloroplast evolution in Brassicaceae
… at different taxonomic levels (tribe, genus, and species) remained problematic and evolutionary relationships among and within these lineages were still largely unclear. This is partly due to the fact that the past studies lacked information, as they mainly utilized the morphological data, nuclear …
-
Plastomes of the subfamily Cactoideae (Cactaceae): genomic, structural and evolutionary aspects
… regions. Cactoideae is the richest subfamily in species diversity within Cactaceae. Representative species of this subfamily, such as Melocactus glaucescens, Lepismium cruciforme, and Schlumbergera truncata demonstrate interesting evolutionary aspects. They have different lifestyles and inhabit …
-
Protective Role of Mesenchymal MyD88 Signaling Under Homeostasis and Initiation of Inflammation in the Colon
… we used Lactobacillus rhamnosus GG (LbGG) as a representative species of normal beneficial gut microbiota. I demonstrated that mesenchymal stromal cells isolated from the normal human colonic mucosa responded to LbGG with activation of the eicosanoid pathway resulting in increased expression of …
-
Development and Characterization of An In Vitro Four-Species Anaerobic Dental Biofilm Model
… agent. Instead, caries is associated with multispecies microbial biofilm communities composed of some bacterial species that directly influence the development of a caries lesion and other species that are seemingly benign but must contribute to the community in an uncharacterized way. Clinical …
-
Evolution of a Novel Neuronal Sex-Specifically Spliced Gene in Mosquitoes
<p>Female mosquitoes from many species require a blood meal from an animal host as a protein source for egg development and successful reproduction. The majority of mosquito species are generalists in their host preference, feeding on a range of animals including mammals, birds, and amphibians. …
-
Systematics, Phylogeography and Ecology of Elaphomycetaceae
… each subgenus of Elaphomyces is nearly global; representative species have been found on every continent save Africa and Antarctica. This biogeographic pattern does not follow the pattern expected by a scenario of continental vicariance. Dating analysis in BEAST confirmed that broadly …
Page 1 of 2