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 20 of 203 for “"ecological processes"”.
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Understanding the role of plant hydraulic traits in ecological processes
Among all ecosystems tropical forests play a disproportionate role in Earth’s carbon cycle as they account for one third of total primary productivity. Global environmental change is causing novel precipitation patterns, shifts in the timing of rainfall events and an increase of the atmospheric …
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Beaver as drivers of hydrogeomorphic and ecological processes in a mountain valley
… of beaver dams on hydrologic, geomorphic, and ecological processes in a mountain valley. The influence of two in-channel beaver dams and a 10-year flood event on surface inundation, groundwater levels, and flow patterns was examined in a 1.5-km section of the Colorado River valley in Rocky …
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Unified Mathematical Modeling, Analysis and Simulation of COVID-19 and Ecological Processes
… we extend our compartmental modeling approach to ecological studies, specifically examining the group dynamics of degus, small rodents with complex social behaviors. We analyze how environmental factors such as temperature variations, seasonal rainfall patterns, and vegetation indices (NDVI) …
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The influence of Microhodotermes viator nest density and dispersion on ecological processes
Heuweltjies are typically described as raised (± 2 m in height) circular earth mounds (5 – 30 m diameter) ubiquitous with the southern harvester termite (Microhodotermes viator), that occur in regular hexagonal patterns, predominantly in the north-western Succulent Karoo of South Africa, and are …
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Integrating Forest Ecological Processes, Management, and Carbon Payments to Assess Ecosystem Service Tradeoffs
… model that fully couples the social and forest ecological system. Besides the potential uses for fulfilling the requirements of carbon accounting, the result from the first step of the dissertation is the maps of annual volume of harvested timber of various types. The maps can be used to further …
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From Small to Large: Modeling at the Scale of Ecological Processes to Understand Temperate Forest Range Limits, Biomass, and Traits
… global change is expected to fundamentally alter ecological communities. Forecasting the consequences of this change requires an understanding of current drivers of ecosystem form and function, yet the scale of available data is often mismatched to the scale of the ecological processes of …
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Effects of Climate and Ecological Processes on Engineered Uranium Disposal Cell Performance with Respect to Nearby Subsistence-Based Indigenous Communities
… years. Little is known about how natural ecological succession will impact the performance of earthen-engineered covers. Furthermore, there is a dearth of information about how subsistence-dependent Indigenous communities located nearby inactive uranium disposal facilities are impacted by …
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Ecosystem goods and services in semi-arid lanscape : an examination of the relationship between ecological processes, land-use strategies and biodiversity conservation
… of ecosystem goods and services, which are processes and conditions of ecosystems that benefit humans and their activities. The research focus on ecosystem goods and services to date has been at global and regional scales, and there is a paucity of research at the fine scale. Benefits need …
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Biological and ecological processes during the establishment of a marine invasion : the Siganus rabbitfishes from the Red Sea to the coastal areas of Cyrenaica, Libya
… Sea and offer a unique opportunity to examine ecological and morphological variation during the process of invasion and establishment. Using and integrated geometric morphometric and stable isotope approach we investigated ecological adaptation in these two species from native into novel …
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Modeling the effects of environmental and ecological processes on the transport, mortality, growth and distribution of early stages of Cape Anchovy (Engraulis Encrasicolus) in the Benguela system
… was used to study environmental factors and processes influencing the early life history of anchovy in the southern Benguela region and on the Agulhas Bank. The intention was to then establish the link between these factors and processes and the recruitment success of anchovy in the southern …
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Identifying ecological differentiation in microbial communities across taxonomic scales
… and phenotypic, is a product of evolutionary and ecological processes interacting at multiple levels of biological organization. High-throughput sequencing is providing a means to resolve the vast amount of genetic diversity in microbial assemblages. However, a current fundamental challenge is …
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Consequences of Spatial Exploitation in Complex Adaptive Social-Ecological Systems: Managing for Sustainable Freshwater Fisheries
Freshwater fisheries are complex adaptive social-ecological systems structured by coupled feedbacks between fish and people (e.g., anglers). For example, fishing quality influences angler site choices, and anglers reciprocally impact fish populations at chosen sites through size-selective harvest, …
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Asynchrony in the dynamics of chironomids across six locations in northeastern Iceland
… multiple locations can provide insights into the ecological processes shaping changes in the abundances of species. Here, I examine 18-year time series of abundances of non-biting midges (Diptera: Chironomidae) from window trap samples at five lakes in northeastern Iceland: Miklavatn, …
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The role of genotypic diversity in stabilizing plant productivity in variable environments
… system to allow for reproducible experiments on ecological processes operating within crop genetic mixtures. Knowledge of the ecological processes occurring within varietal mixtures may improve the exploitation of mixtures in both conventional and subsistence agriculture. Genotypic diversity …
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Flux: Creating Dynamic Systems Within the Built Environment
… shifting demands placed upon it by human and ecological processes, there is a need to incorporate the flux of these human and ecological processes into a physical and dynamic share of the built environment. This will require a perceptual shift in understanding this human/ecological …
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Untangling clumps-factors influencing seedling ecology in a semi-desert, and the implications for restoration ecology
… between plants and patch dynamics are two common ecological processes in semi-arid regions. I tested the relevance of these processes to seedling establishment of perennial species on degraded landscapes in Namaqualand, South Africa. The species were grouped into two functional guilds, …
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The Causes and Consequences of Community Disassembly in Human Modified Tropical Forest: Scarabaeine Dung Beetles as a Model System
… the persistence of native biota and associated ecological and evolutionary processes. Meeting this applied biodiversity research challenge requires that we understand (i) patterns in biological responses to anthropogenic environmental change, (ii) what biological mechanisms influence that …
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Invertebrate mediated biodiversity-ecosystem functioning relationships : lessons from tropical forest dung beetles
… and decomposition. Since these ecosystem processes underpin a number of goods and services to society, human-driven changes in the structure of ecosystems could negatively impact upon human wellbeing. However, the majority of our knowledge of the role of biodiversity in ecosystem …
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Ecology and behaviour of burrowing prawns and their burrow symbionts
… study aimed to enhance our understanding of the ecological processes and behavioural interactions underlying symbiotic relationships between a dominant South African ecosystem engineer (Callianassa kraussi) and its burrow symbiont (Betaeus jucundus) in soft sediment systems in Langebaan Lagoon. …
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The influence of an ecosystem engineer on nutrient subsidies and fish invasions in southwestern Montana
… However, it is unclear how beaver modify ecological processes linking abiotic factors to changes in the surrounding biotic community. I investigated how beaver impoundments influence local food web processes, as well as impact native fish species threatened by nonnative invasions.</p> <p>I …
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