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 15 of 15 for “"Plant Functional Groups"”.
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Spatiotemporally explicit incidence analysis of plant functional groups in metacommunities
Diese Arbeit untersucht die Rolle von Metagemeinschaftsmechanismen für die Diversität von Pflanzengemeinschaften in einer dynamischen, urbanen Landschaft. Dazu wird auf der Basis funktioneller Merkmale die relative Bedeutung von Ausbreitungslimitierung, abiotischem Stress und Konkurrenz bestimmt, …
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Habitat models for plant functional groups with respect to soil parameters and management
… purpose presence/absence data of the occurring plant species were recorded along with abiotic parameters such as soil and climatic factors and management strategy on variously utilised investigation plots. For selected species biological traits were recorded. On their basis species were grouped …
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Storage effects: the relationship between the hydrological dynamics of small infield pools and plant functional groups
… a new method to calculate the responses of plant species with certain traits according to the habitat quality. The resulting PFGs are characterised by different storage, competition, and adaptation strategies.
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Viðbrögð virknihópa plantna viðáburðargjöf ogútilokun beitar á íslenska hálendinu
… measures are implemented. In this study, I use plant community data from a field experiment to examine the effects of two management practices, grazing exclusion and fertilization, on the cover of different plant functional groups after four years of treatment. Plant functional groups are groups …
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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 …
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Establishment of native plant species for livestock forage in silvopasture systems
… each treatment affect establishment of native plant species. The experiment was a Randomized Complete Block Design replicated in 2020 and 2021. Treatment establishment (3 treatments, 3 replications each) began each fall preceding the growing season by no-till drilling the cool season grasses. …
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Vegetation structure and inferred patterns of functional group attrition in a shrub encroached old field and tallgrass prairie mosaic
… the differences in diversity and species and functional group composition along a gradient of woody encroachment to help gauge restoration potential and gain insights into patterns of disassembly in grassland communities. The study site is a 65 ha (160 acre) tallgrass prairie and old field …
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Plants in urban brownfields: modeling the driving factors of site conditions and of plant functional group occurrence in a dynamic environment
… Germany. Presence/absence data of vascular plants, traits of selected species and environmental conditions were recorded. By clustering the species according to their traits into plant functional groups (PFGs) and subsequent modeling, in the first part of the thesis, I identified relevant …
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Disturbance, Functional Diversity and Ecosystem Processes: Does Species Identity Matter?
… and ecosystem processes. Additionally, plant functional diversity has been suggested as the key to ecosystem processes such as productivity and nutrient dynamics. I investigated how disturbance and functional composition both singly and in combination affect vegetation dynamics, soil …
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A System Dynamics Model of Soil Carbon Stock and Flows in Grasslands Under Climate and Grazing Scenarios.
… the start of validation. This thesis used four plant functional groups (C3 and C4 grasses, forbs, and legumes) as the base groups for the model. C4 grasses were not found in in the field study but served to test whether the model detected changes in sequestration when grassland composition is …
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Leveraging the Landsat archive to characterize plant species diversity and post-fire recovery in Great Basin shrublands
… that variation in spectral values relates to plant species diversity, which, in turn, is theorized to be an important predictor of resilience to disturbance and resistance to invasive species. Weak relationships from the spectral heterogeneity tests led us to explicitly model plant species …
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Plant growth responses to winter climate change: from amongand within-species variation to plant-soil interactions
… 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 tolerance. …
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Role of the thermodynamic regime in ecosystem self-organization and its response to human perturbations
… which refers to the number and type of plant functional groups comprising an ecosystem, is the result of self-organization, or the spontaneous emergence of order from random fluctuations. By treating ecosystems as open thermodynamic systems, we use a multi-layer canopy-root-soil model to …
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Managing disturbance in the longleaf pine ecosystem: effects of managed fire regime characteristics on fire hazard and community ecology at multiple spatial scales
… understory biomass, grouped by genera and plant functional groups. Fire frequency, as measured by the mean fire interval (MFI) and coarse woody debris biomass had marginally significant effects on understory composition. These variables, though uncorrelated, weakly aligned with the first …
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Microbial diversity and activity in temperate forest and grassland ecosystems
… aimed at investigating the effect of aboveground plant diversity on ammonia oxidizing bacteria diversity and function in forest and grassland soils with focus on the influence of (a) functional group identity of grassland plants (legumes, grasses, forbs), (b) grassland plant species richness and …