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 137 for “"ecosystem health"”.
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Unpacking Entrepreneurial Ecosystem Health: An Entrepreneurial Process Approach
… On the other hand, although entrepreneurial ecosystem literature provides a new perspective to understand regional entrepreneurship in context by shedding light on the structures and building blocks of an entrepreneurial ecosystem, relatively less is known about what dimensions and factors …
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Aspects of ecosystem health in the Colorado River Delta, Mexico
Two aspects of ecosystem health in the Colorado River delta were investigated as part of the present dissertation. The following is a summary of the most important findings: Contaminants of natural origin (e.g. selenium) and anthropogenic activities (e.g. pesticides) represent a potential threat …
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How rewilding impacts ecosystem health in a semi-arid region
… potential to assist in reestablishing critical ecosystem functions, helping create dynamic, resilient, and self-sustaining ecosystems. Here I test the general idea that the reintroduction of megafauna such as elephant, rhino, and buffalo will alter soil and vegetation characteristics as well as …
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Exploring the role of reactive oxygen species (ROS) in marine ecosystem health and function
With the rapid decline of coastal ecosystems such as coral reefs and seagrasses, it is crucial to better understand the health of these ecosystem to prevent future loss. Reactive oxygen speices (ROS), such as superoxide and hydrogen peroxide, play an underappreciated role in both organism health …
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Integrative Analysis of Policy Changes for a Coastal Watershed: Implications for Agriculture and Ecosystem Health
… in nitrogen processes and their impacts on ecosystem health. This reveals increased nitrate loads under sea level rise scenarios. The third chapter merges econometric and engineering frameworks to evaluate the efficacy of agricultural best management practices (BMPs) as influenced by …
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MULTIDISCIPLINARY WORK TO DETERMINE HYDROLOGY OF ARID LAND SPRINGS AND HOW SPRING WATERS INFLUENCE WATER QUALITY AND ECOSYSTEM HEALTH FOR DESERT ENVIRONMENTS
In the desert southwestern United States, water resources are stressed due to anthropogenic use, drought and climate change. Arid land spring sites are considered hotspots for biodiversity, providing refugia to aquatic habitats during dry seasons. To quantify the importance of desert land springs, …
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Can mercury levels in bat species along the St. Lawrence River in Ontario be used as an effective biomarker in assessing ecosystem health?
This pioneering investigation focused on the mercury bioaccumulation relationship of bats and insects. Identifying biomarkers that can be extrapolated to humans is necessary. Radio-transmitter-fitted bats were tracked to identify five of their preferred feeding sites within and outside the Cornwall …
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Ecosystem health in Guánica Bay and La Parguera, Puerto Rico: Remote sensing of ocean color and metal analysis of coral tissue and surficial sediments
… in southwest Puerto Rico, with a coral reef ecosystem at its periphery. This ecosystem is affected by sediments, nutrients, and contaminants from the watershed through the Bay and into the offshore water. This project evaluates Guánica Bay and La Parguera coastal areas through remote sensing …
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A Seat at the Table: A Nonconformist Approach to Grassroots Participation in the Articulation of Health Standards
… decision making and monitoring of biomedical and ecosystem health in Canadian Aboriginal communities. This is critical, as standards in Aboriginal communities are applied by external regulators. Absence of collaboration between the Aboriginal community, healthcare institutions, and the federal …
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Assessing Cow Creek following a riparian restoration
… in the watershed continue. I assessed the ecosystem health of Cow Creek using two independent techniques: analysis of benthic macroinvertebrate communities and measurement of nutrient uptake rates following short-term nutrient additions. Characterization of benthic macroinvertebrate …
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Coral reef health indicators: integrating ecological and perceptual assessments of anchor damage
The ecosystem health concept is an integrative approach to environmental management and while conceptually logical, it is difficult to implement. The false dichotomy of nature and culture, and the way in which knowledge is constructed has led to many of these problems. To understand the …
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FUELS MANAGEMENT POLICY AND PRACTICE IN THE U.S. FOREST SERVICE
… by wildland fire and 2) restoring or maintaining ecosystem health and sustainability. Wildland fire management policy is interagency in scope, including input from state governments and is dispersed among a multitude of policy and strategy documents, such as the 1995/2001 Federal Wildland Fire …
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FUELS MANAGEMENT POLICY AND PRACTICE IN THE U.S. FOREST SERVICE
… by wildland fire and 2) restoring or maintaining ecosystem health and sustainability. Wildland fire management policy is interagency in scope, including input from state governments and is dispersed among a multitude of policy and strategy documents, such as the 1995/2001 Federal Wildland Fire …
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The Role of Leaf Out Timing and Vinca Minor Invasion on a Deciduous Understory Plant Community
Exotic plant invasions threaten biodiversity and ecosystem health. This thesis investigates the effects of the invasive plant Vinca minor on the forest plant community composition under current and future climate scenarios. Field surveys at a longstanding invasion revealed that Vinca minor reduces …
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Assessing the value of green infrastructure networks to manage peak flows and support community resilience to climate change
… with protecting human and environmental health in the face of extreme precipitation events. Ecosystem based adaptation strategies are increasingly recommended. If ecosystems are relied upon for adaptation, it will be critical to maintain ecosystem health through landscape-level management …
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Seafloor Sediment Bacterial Community Profiling for Baselines and Environmental Effects Monitoring at a Deep-Sea Oil Production Site Offshore Nova Scotia, Canada
… pollution is a critical aspect to preserving ecosystem health, but is challenging if baseline conditions are never established. Microorganisms are the first responders in a marine pollution event, hence oil-degrading bacteria can be used to monitor dispersion and biodegradation of oil spills. …
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Understanding patterns of outdoor recreation in Canadian parks using volunteered geographic information and big data
… areas is essential for strategically managing ecosystem health and services. Volunteered geographic information (VGI) sources can provide researchers and management groups with valuable insights into human activity in these areas. In this thesis, I study how VGI sources can be used to estimate …
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Habitat suitability modeling for Lontra canadensis in east Tennessee
… As river otters are indicators of stream ecosystem health, maintaining habitat that is suitable to L. canadensis would also mean providing quality habitat for many riparian species.
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Identifying metabolic indicators of phytoplankton and comparing the temporal changes in algal community composition in two Lake Ontario areas of concern
… when cyanobacteria produce toxins that impact ecosystem health. The point at which algal blooms transition into HABs is not fully understood, but I believe that the transition can be predicted by combining molecular and community-level information. This study consisted of ten weeks of sampling …
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