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 63 for “"plant traits"”.
-
Linking plant traits and herbivory in grassland biodiversity-ecosystem functioning research
… on morphological, physiological, and behavioral traits of species has improved understanding of the processes driving community assembly and the consequences of community disassembly for ecosystem functioning. In addition, there has also been a call for advancing the multitrophic view of …
-
Plant traits and drought tolerance in the savanna : a Kruger National Park case study
One of the central goals of plant ecology is to understand the factors that control the local distribution of plant species and thus the composition of communities. The aim of this study is to determine plant functional traits that can be associated with drought tolerance/avoidance and to test …
-
Discerning Differences in the Plant Traits of the Floral Communities of Mt. Washington, NH, by Incorporating Intraspecific Variability Analysis
Plant functional traits allow ecologists to assess the ways floral communities respond to abiotic and biotic factors. By analyzing these traits, we can then ultimately assume the factors that control species distribution and community composition. Here, I analyzed plant traits (plant height, leaf …
-
Towards 3D Crop Phenotyping of Above- and Belowground Grain Sorghum Plant Traits Using Airborne Mounted Multispectral Camera, TLS, and GPR Remote Sensing Technologies
… a focus on crop phenotyping and nondestructive plant health monitoring. Climate change in the western United States has led to increasing aridity, and reduced precipitation and thus a growing need for emerging varieties of drought-tolerant crops and technology to accurately monitor their …
-
Functional analysis and modelling of vegetation: plant functional types in a mesocosmos experiment and a mechanistic model
… A statistical method for the optimisation of plant functional types is developed in the first part. The fourth corner method by Pierre Legendre et al. was adapted to the task of grouping of plant functional types. New null models are developed for this randomisation method and their …
-
Shoot Flammability Patterns in Urban Plants at the Wildland-Urban Interface of the Greater Sydney Region
… flammability assessments of native and exotic plants within Australia, using a bespoke flammability device. The worsening nature of wildfires on the eastern coast of Australia due to climate change, poses a great risk to populations living at the wildland urban interface. Gardens and street …
-
THE ROLE OF MICROBIAL ENDOSYMBIONTS IN SORGHUM HALEPENSE INVASIONS: EVIDENCE OF A NEW INVASION STRATEGY, MICROBIALLY ENHANCED COMPETITIVE ABILITY (MECA)
Invasive plants can profoundly alter ecosystem processes, and tremendous economic costs are often associated with these disturbances. Attributes like higher growth rates, increased biomass, and enhanced chemical defenses have been documented in many invasive plants. When expanding into new ranges, …
-
THE ROLE OF MICROBIAL ENDOSYMBIONTS IN SORGHUM HALEPENSE INVASIONS: EVIDENCE OF A NEW INVASION STRATEGY, MICROBIALLY ENHANCED COMPETITIVE ABILITY (MECA)
Invasive plants can profoundly alter ecosystem processes, and tremendous economic costs are often associated with these disturbances. Attributes like higher growth rates, increased biomass, and enhanced chemical defenses have been documented in many invasive plants. When expanding into new ranges, …
-
A Community's Natural Resistance to Invasion by Cheatgrass and the Effects of Associational Herbivory
… for generalist grasshoppers, (2) among native plant species, the amount of herbivory corresponded with their total percent nitrogen and other plant traits, and (3) a native grass, Elymus elymoides, experienced higher herbivory in high- than in low-density cheatgrass patches, supporting the …
-
Adaptability of Soybeans to Late-Planted Environments (Isolines, Gxe, Double Cropping)
… genotype by cropping system interactions, plant traits associated with high yield in double-crop environments, and sources of breeding lines possessing these adaptive traits.
-
The influence of intraspecific variation in host plants on arthropod and fungal endophyte communities
… intraspecific genetic variation, particularly in plants, has received more attention, and has been linked to variation in plant-associated biotic assemblages and ecosystem function. However, in many cases, the phenotypic variation associated with influential genetic variation is unknown. In …
-
Phenomics enabled genetic dissection of complex traits in wheat breeding
… rapid and accurate phenotyping of complex plant traits remains a major bottleneck. Here, we demonstrate field-based complex trait assessment approaches using a commercially available light-weight Unmanned Aerial Systems (UAS). By deploying novel data acquisition and processing pipelines, we …
-
Evaluation of Five Cycles of Selection for Canopy Photosynthesis in Corn
… matter production and thus economic yield of a plant. Beginning in 1982, half-sib families of maize synthetic RSSSC were monitored for CO$\sb2$ exchange rate, (CER), a common indicator of photosynthesis. The objectives of the study were to determine: (1) the seasonal characteristics of maize …
-
Characterization of the effect of nitrogen deficiency on above-ground plant phenotypes in relation to root complexity in maize
Nitrogen (N) is an essential plant nutrient in maize production, and if considering only natural sources, is often the limiting factor world-wide in terms of a plant’s grain yield. For this reason, many farmers around the world supplement available soil N with synthetic man-made forms. Years of …
-
Trait-based approaches to understanding the response of forest understory herbs to environmental variation
… relationships between abiotic conditions and plant fitness components (i.e., survival, growth, and performance) can provide valuable insights into how populations and communities will respond to future environmental change. Trait-based approaches can thus offer valuable insights into how …
-
Plant Defensive Traits: Translation of Their Effects on Herbivorous Insects Into Reduced Plant Damage (Evolution, Feeding Compensation, Predation)
Plant traits can have four basic negative effects on herbivores: reduced individual growth, reduced population growth, directly lethal effects, and reduced preference for the plant. The first part of this thesis provides a theoretical overview of the potential mechanisms through which these …
-
Investigations of physiological and competitive relationships of Elymus species related to establishment in the Great Basin, USA.
… success could be related to physiology of native plants in competition for limiting nutrients: Bromus tectorum employs ruderal strategies of resource acquisition, is an effective competitor for water and nitrogen, and can cause mortality of natives in invaded fields as well as prevent …
-
The Effects of Vegetation on Ecosystem Services Provisioning by Stormwater Bioretention
… This dissertation explores the myriad ways plants influence these services, with a focus on indi- vidual plant traits, suites of traits that reflect underlying plant adaptive strategies, emergent landscape-scale factors like pattern, and ecological attributes like nativeness. The first chap- …
-
A Tale of Three Resources: The Influence of Multiple Resources on Plant-Herbivore Interactions
<p>Although studies indicate that plant growth can be co-limited by multiple resources, particularly water, nitrogen (N), and phosphorus (P), the role of co-limiting resources in driving plant-herbivore interactions remains poorly understood. Evidence indicates that the resources that limit plant …
-
Herbaceous species diversity, redundancy and resilience of Mopaneveld across different land-uses
… to which anthropogenic disturbances affect plant diversity and function of the herbaceous layer. This study aimed to quantify the effect of various land-use practices on herbaceous plant community structure, which included productivity (biomass) as well as richness, evenness and diversity at …
Page 1 of 4