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 19 of 19 for “"Seasonal growth"”.
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Flowering Gene Homologs Regulate Seasonal Growth Changes in Poplar
… to environmental signals that are markers of seasonal changes in order to survive winter and maximize growth. The genus Populus (poplars) is a model system for identifying the genes and molecular mechanisms that regulate growth and dormancy transitions. Photoperiod and temperature regulate …
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An Examination of Seasonal Growth and Survivorship of <i>Sigmodon hispidus</i> in Southeastern Virginia
… population characteristics, such as density, growth, and survival. General population trends and rates of growth and survival in males and females throughout the seasons in Virginia will also provide a basis for comparison with populations of cotton rats in other parts of its range. A monthly …
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THE CORAL CLADOCORA CAESPITOSA AS A HIGH RESOLUTION PALAEOCLIMATE ARCHIVE
… is an established method to reconstruct seawater growth temperatures for palaeoenvironmental studies. In this work the temperate, colonial, Mediterranean scleractinian coral Cladocora caespitosa was investigated. First modern Adriatic corals from Mljet (Croatia) where growth temperatures were …
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Experimental studies of interactions between Zostera marina and the associated benthic fauna
… the macro-invertebrate species composition and seasonal changes in abundance of the benthic infauna within an eelgrass bed; (2) Observe what immediate effects occur to the benthic community as a result of experimental removal of eelgrass plants from plants within the Zostera bed; (3) Measure the …
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The Effect of Seasonal Vegetation Changes on Habitat Suitability and Predation Risk of the Vancouver Island Marmot
… shifts in these habitats are likely affecting seasonal vegetation cover and reducing the ability of marmots to visually detect predators, thereby increasing their risk of predation. Most marmot mortalities occur during the late summer, which may be related to peak vegetation growth during that …
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Why is Chasmanthe spp. absent from the archaeological record of the south-western Cape?
… of this area. The carbohydrate-rich corms follow seasonal growth patterns and mainly flowering in spring and early summer and growing during the winter months. Hunter-gatherers must have been familiar with their growth patterns and their palatability so that they could exploit these plants when …
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Distribution and ecology of charophytes in the Baltic Sea.
… the study was to describe the distribution and seasonal growth pattern of charophytes in the Baltic Sea area and determine the importance of the key environmental factors and invertebrate grazing on the development of charophyte communities. This thesis is focused on two species – the …
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Physiology and Growth Responses of Cool Season Turfgrasses Treated With Trinexapac -Ethyl or Paclobutrazol
Plant growth regulators (PGRs) such as trinexapac-ethyl (TE) and paclobutrazol (PAC) are often routinely applied to highly managed turfgrasses to suppress clipping production, increase sward density, and enhance color. However, reports of variability in the seasonal responses of PGRs indicate …
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Genomics of Climatic Adaptation in Populus Trichocarapa
Temperate tree species exhibit seasonal growth cycling, and the timing of such transition varies with local climate. Under anthropogenic climate change, the local pattern of growth and dormancy in tree populations is expected to become uncoupled with shifting seasonal environmental signals, …
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The presence of absense : Haymarket
… The goal of this project is to make legible the seasonal growth and decay of an open-air public market in a way that is resonant with the form of the city and its daily life. If we understand a connection to natural and seasonal cycles and a sense of continuity to be a positive thing, this …
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Effects of Lawn Maintenance on Nutrient Losses via Overland Flow and the Comparison of Nitrous Oxide Flux from Three Residential Landscapes A Case Study
… presence or absence of irrigation, and seasonal growth patterns of the fescue. For the RFL, the presence of a decomposing litter layer limited N2O production. Well-maintained residential lawns, receiving recommended fertilizer N applications and frequent irrigation, reduce nutrient …
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Trophic Dynamic Interactions in a Temperate Karst River
… series of innumerable, below-ground conduits. Seasonal growth of the filamentous alga, Cladophora, is typically associated with nutrient-rich waters. This research compared macroinvertebrate food web structure between riverine reaches with contrasting underlying karst topography, nutrient …
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THE DEVELOPMENT OF DIATOM-NUTRIENT PALAEOLIMNOLOGICAL INFERENCE MODELS FOR UK LOWLAND RESERVOIRS
… and contemporary environmental data measured seasonally between May 1999 and October 2000. Following removal of outliers the dataset spans a total phosphorus (TP) gradient of 12-242 µgl ˉ¹ (mean = 63), a chlorophyll-α (Chla) gradient of 1.8-25.5 µgl ˉ¹ (mean = 63) and a conductivity (EC) …
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A study of flow structures in a two-stage channel using field data, a physical model and numerical modelling
… reduced during summer months, due to seasonal growth in vegetation, reaching a minimum in August. The gradient of the stagedischarge rating curve for summer months can be seven times larger than that for the winter months. The falling limbs of the rating curve have a higher discharge …
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A study of the distribution of algae in the Two Oceans Aquarium, Kelp Tank, Cape Town
… all found to be optimal for photosynthesis and growth to occur. Water motion was seen as the only limiting factor for photosynthesis and growth as it also has an effect on nutrient uptake. Grazer intensity was also examined. It was found that grazing by fish was stable; however, grazing by …
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Light-emitting diodes as an alternative supplemental lighting source for greenhouse tomato propagation and production
… to complement solar radiation in light-limited seasonal climates. However, SL represents a large expense to greenhouse-vegetable production. Currently, energy is second only to labor as the most expensive indirect cost of production. Thus, the greenhouse industry is interested in cost-effective, …
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Using algae as environmental impact indicators in urban freshwater ponds
… competition effects due to excessive plant growth of <i>Phragmites australis</i> and duckweed and pond turbidity.<br/><br/>At the biochemical level the investigation of a total antioxidant assay (based on the chemical reagent ABTS) was developed for <i>C. glomerata</i> to assess sub-cellular …
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Environmental Cues in the Seasonal Development of the Southern California Annual Grassland
… characteristically experience a succession of seasonal phases 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 …
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Some aspects of the seed development and seedling growth of rimu, Dacrydium cupressinum, Lamb
… Westland and Catlins) were used in a variety of growth experiments to examine their responses to different growing irradiances, temperature regimes, photoperiods and seasons. Growth was assessed by growth analysis and direct measurement. Gas exchange studies were made using an infra-red gas …