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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 993 for “"plant species"”.
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Landscape genomics of tropical high altitude plant species
Changes to species distributions involve demographic processes that occur over generations and affect allele frequencies within populations, leading to patterns of genetic restructuring. The specific genetic structuring patterns that will be observed as a consequence depend on explicit geographical …
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Processes determining plant species diversity in restored tallgrass prairie
… system in which to study the restoration of plant diversity. Because remnant prairies are rare, prairie restoration projects are now very common, and the size and longevity of grassland plants makes them easy to measure and manipulate. Here, we present the first synthetic study to test the …
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Fate of 2,4-Dichlorophenoxyacetic Acid in Several Plant Species
Made available in DSpace on 2014-12-10T17:12:44Z (GMT). No. of bitstreams: 1 7000834.pdf: 2812081 bytes, checksum: 1c0000c053c05133d3e5e58939e13513 (MD5) Previous issue date: 1969
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Understanding Meiotic Recombination and Genomic Organisation of Plant Species
… of genetic variation in sexually reproducing species. Crossover events are not distributed randomly along chromosomes and some regions of the genome, like the centromeres, rarely undergo recombination. Modifying crossover levels and distributions via genetic engineering may provide effective …
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Nutrient Foraging in Ten Southeast Coastal Plain Plant Species
Plant root system response to nutrient heterogeneity was tested in ten plant species of varying life form and successional status. All plants tested are native to the South Carolina coastal plain. Morphological responses of the root system (scale, precision and discrimination) and overall plant …
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A climate change vulnerability assessment of 58 Richtersveld plant species
… Province. This region has an incredible arid plant diversity, with both the highest succulent plant diversity and highest rate of endemism in an arid area, globally. It forms part of both a global biodiversity hotspot and a UNESCO world heritage site. However, it is already experiencing …
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Plant Species and Functional Diversity along Altitudinal Gradients, Southwest Ethiopian Highlands
… partly because of the complex relationships of species to the environment and the choice of the response variable itself, i.e. using taxonomic richness as a metrics of diversity. This thesis, therefore, applies plant functional types (hereafter PFTs) approach to study the response of vegetation …
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CHARACTERIZING PATTERNS IN TEXAS GULF COAST BEACH DUNE PLANT SPECIES COMPOSITION
<p>Regional vegetation patterns of Texas beach plant communities were analyzed using cluster analysis, ANOSIM, SIMPER, NMDS, and ISA for fives zones representing the foredune complex of twenty Gulf Coast beaches. ANOVA revealed that zones differ in terms of percent bare sand, percent vegetative …
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Establishment of native plant species for livestock forage in silvopasture systems
… native rather than introduced forage species. Our objectives were to: determine success of establishment of native cool and warm season grasses, and native forb and legume species in two different existing silvopasture systems -- pitch pine (Pinus rigida Mill.) x loblolly pine (Pinus …
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Competition among simulated plant species in a toy local vegetation model
… Mooney (2000) used a trait-based simulation of plants in the global environment to argue that the tropics maintain more biodiversity because a greater variety of strategies of allocation of functional parts, such as leaves and roots, lead to viable physiologies in those regions. However, they …
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Distribution patterns of riparian plant species across river of Sardinia and Tuscany
… and ecological groups, alien and endemic species, and also on the application of landscape classifications to be used as surrogate in conservation planning. The main goal is to evaluate similarities and differences among these rivers in the frame of a regional scale approach of study, thus …
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Molecular markers for the assessment of genetic variability in threatened plant species
La variabilità genetica è un importante strumento per lo studio e la conservazione della biodiversità in specie rare e minacciate di estinzione. Durante il mio dottorato mi sono quindi occupata di mettere a punto diverse metodologie molecolari al fine di valutare la diversità genetica in due specie …
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The concept of ecological conservatism and the characteristics of conservative plant species
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-15 without embargo terms
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Solarization as a means to eliminate invasive plant species and target the seedbank
… system has changed dramatically in both its species composition and hydrodynamic regime due to years of human influences. What was once a thriving population of native plant species has become an environment dominated almost completely by aggressive exotic invasive species. The goal of this …
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Distribution of Invasive Plant Species on Debris Cones at Mount Rainier National Park
<p>Invasive plant populations within Mount Rainier National Park are a biological and ecological threat to the unique mountain landscape. A better understanding of their distribution and transport within the landscape is needed to improve invasive species monitoring for National Park Service …
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