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 18 of 18 for “"Long-term patterns"”.
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Long-term patterns of mortality and regeneration in near-natural woodland
1. Long-term patterns of natural regeneration, growth, mortality and disturbance were recorded in six native lowland woods around Britain, using a series of permanent transects/plots established during the 1950-80s. Records were made including the position and status of trees, shrubs, established …
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Identifying long term patterns and drivers of vegetation structure in an African savanna using stable carbon and nitrogen isotopes
Savanna systems are complex and dynamic in space and time. Climate, fire, herbivory and nutrients have been identified as structuring agents of savanna form and function, but their interactions and feedbacks with one another and vegetation are poorly resolved. Increasing the spatial and temporal …
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Load reduction and invasive mussel effects on eutrophication dynamics in Saginaw Bay, Lake Huron
… Lakes.</p><p>This dissertation characterizes long-term patterns of phosphorus loading and mussel populations for Saginaw Bay, and estimates the effects of load reductions and dreissenid invasion on several aspects of pelagic water quality, focusing on phosphorus flux and cycling in Saginaw …
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Survey of the Native and Nonnative Vascular Plant Species of Three Islands in Lake Winnipesaukee, New Hampshire
This study examined the long-term patterns in vascular plant composition on three islands in Lake Winnipesaukee, NH. It also tested the role of island biogeography in ecology as it analyzed the effectiveness of a land use plan implemented on the islands. Samplings were made on the islands in the …
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Behavioural Ecology of Large Tuna
… while lower-resolution deployments reveal long-term patterns. This thesis first synthesises six decades of accelerometry applications in animal research, reviewing 1,520 studies across 400+ species (Chapter 2). It then uses Atlantic bluefin tuna (Thunnus thynnus, ABT), large migratory apex …
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Constructing the Active-Body: A Sociological Investigation
… of the self, this study shows that the key determinant to a successful engagement is the development and maintenance of an acceptable social identity amongst participating others. Furthermore, this study shows that as sports and physical activities are embodied activities, the possession of an …
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The influences of hydrology and vegetation on emergent insect and benthic macroinvertebrate communities across space and time in seasonally inundated, geographically isolated wetlands
… respond to vegetation and differences in long-term patterns of water permanency in isolated wetlands is unknown. To understand the influences of vegetation type and historical hydrology in isolated wetlands, we investigated benthic and emergent macroinvertebrate community characteristics …
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Dissolved organic matter dynamics in diverse freshwater ecosystems across Canada: long-term trends, transformations, and explanatory factors
… require updated analysis. This research examines long-term patterns of DOM in diverse freshwater ecosystems across Canada and determines the factors that best explain them. Rivers play a critical role in the global carbon cycle by connecting terrestrial and aquatic ecosystems and serving as …
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Investigating the molecular biology of aging and extended longevity: Proteomic and genomic analysis of mouse liver
… of oxidative stress and the genetic basis of longevity. Progressive accumulation of oxidative damage to macromolecules is thought to underlie the aging-associated decline in physiologic function characteristic of the senescent phenotype. Mitochondria are a major intracellular source of …
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The influence of rainfall seasonality and climate change on the demography of Aloe Dichotoma, a long-lived succulent tree from semi-arid southern Africa
… of southern Africa, Aloe dichotoma Masson, a long-lived succulent tree species, is thought to be responding to anthropogenic climate change. However, differences in response across its distribution are likely to be related to rainfall seasonality. This study investigated change in ten Aloe …
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Considering the importance of wetlands to hunter-gatherer adaptation : a microbotanical investigation of Late Pleistocene plant-use in the Eastern Levant
… analysis to explore through direct evidence, the long-term patterns of Late Pleistocene hunter-gatherer plant-use in the Eastern Levant. The phytolith data presented in this dissertation demonstrates clearly that wetlands are vital to understanding Late Pleistocene hunter-gatherer adaptations in …
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The relationship between invasive annual grasses and biological soil crust across Eastern Washington
… studied. The goals of my project were to I) determine how the relationship between invasive annual grasses and biocrust vary across a precipitation gradient and among different invasive annual grass species, 2) determine how patterns of biocrust and Ventenata dubia change over time (3 years), …
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Ethnic mobility and the spatial distribution of ethnicity in Auckland
… is important. Studying changing diversity in terms of the groups that constitute a population and how that varies within regions and between local areas assists in understanding socio-economic and demographic sub-national trends. It is important to project the probable future population …
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Habitat Selection of Gulf-Strain Striped Bass, <i>Morone saxatilis</i>: Relationships to Dynamic Abiotic Environmental Characteristics Within the Biloxi River, Mississippi
… was to provide insights about the short- and long-term patterns of habitat selection of Gulf-strain Striped Bass, <em>Morone saxatilis</em>, based on spatially and seasonally variable abiotic environmental characteristics (water temperature, dissolved oxygen (DO), salinity, specific …
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Modelling regime shifts in the southern Benguela : a frame-based approach
… upwelling systems are characterised by long-term patterns of alternating dominance. Sardine and anchovy are the most important small pelagic species in the southern Benguela ecosystem, which has been shown to have undergone regime shifts during the past 50 years. Modelling regime shifts …
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Changing crime mix patterns of criminal careers : longitudinal latent variable approaches for modelling conviction data in England & Wales and the Netherlands
… life course. This neglects any changes in the patterns and types of offences being committed. However, it is crucial to explore these patterns of offending in detail and various types of crimes being committed, as this will enhance the understanding of criminal activity and the causes of …
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Recognition and investigation of temporal patterns in seismic wavefields using unsupervised learning techniques
… The latter allows the recognition of wavefield patterns, such as short-term transients and long-term variations, with a minimum of domain knowledge. Besides classical earthquake seismology, investigations of temporal patterns in seismic data also concern novel approaches such as noise …
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High-Resolution, High-Frequency Modal Analysis for Instrumented Buildings
… failure is hard to predict, both in terms of occurrence and impact. This is due to combination of many factors, including highly variable environmental and operational conditions, complex construction and materials, and the sheer size of these structures. Often, the mitigation …