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Articles 1 - 8 of 8
Full-Text Articles in Physical Sciences and Mathematics
Defining And Addressing Interconnected Goals In Groundwater Management Planning Across The Usa, Allison Gage
Defining And Addressing Interconnected Goals In Groundwater Management Planning Across The Usa, Allison Gage
Masters Theses
Groundwater accounts for approximately 99% of the available freshwater on Earth, and is an important resource for irrigation, potable water, and domestic use in the United States. However, the overuse of groundwater has led to aquifer depletion in several basins across the USA, resulting in storage reduction, contamination, salt water intrusion, and depletion of surface waters. To properly manage groundwater for the future, there is a need for well-informed Groundwater Management Plans (GWMPs) in order to prevent further depletion and erosion of the resource. Previous studies have focused on groundwater management relative to groundwater laws, regulations, and institutional arrangements. This …
Hydrologic Structure And Function Of Vernal Pools In South Deerfield, Massachusetts, Charlotte Axthelm
Hydrologic Structure And Function Of Vernal Pools In South Deerfield, Massachusetts, Charlotte Axthelm
Masters Theses
Vernal pools are small, ephemeral wetlands lacking an inlet or outlet. These wetlands, also known as seasonal pools, are found in a wide range of biomes, and their characteristics vary based on location. While the vegetation of western U.S. pools, and amphibians of eastern U.S. pools have been extensively studied, many aspects of vernal pools have not been fully characterized. In particular, although the general seasonal wetting and drying cycle is understood qualitatively, few studies have attempted to quantify the hydrological regime of vernal pools in New England. As water level variation drives many, if not all, of the characteristics …
Eastern Whip-Poor-Will Habitat Associations In Fort Drum, Ny, Kimberly Spiller
Eastern Whip-Poor-Will Habitat Associations In Fort Drum, Ny, Kimberly Spiller
Masters Theses
The eastern whip-poor-will (Antrostomus vociferus: hereafter whip-poor-will) has been declining from historical population levels throughout its range in the northeast. Although whip-poor-wills have been reported to use a variety of habitats, most recent studies have associated whip-poor-wills with open habitat, such as early-successional habitats or forest edges. Population declines of other early-successional bird species have been attributed to the loss of early-successional disturbance-dependent habitats in the northeast, and it has been suggested that habitat loss is a significant factor in whip-poor-will population declines, as well. However, there remain substantial gaps in our understanding of whip-poor-will habitat associations, and …
Population Viability And Connectivity Of The Federally Threatened Eastern Indigo Snake In Central Peninsular Florida, Javan Bauder
Population Viability And Connectivity Of The Federally Threatened Eastern Indigo Snake In Central Peninsular Florida, Javan Bauder
Doctoral Dissertations
Understanding the factors influencing the likelihood of persistence of real-world populations requires both an accurate understanding of the traits and behaviors of individuals within those populations (e.g., movement, habitat selection, survival, fecundity, dispersal) but also an understanding of how those traits and behaviors are influenced by landscape features. The federally threatened eastern indigo snake (EIS, Drymarchon couperi) has declined throughout its range primarily due to anthropogenically-induced habitat loss and fragmentation making spatially-explicit assessments of population viability and connectivity essential for understanding its current status and directing future conservation efforts. The primary goal of my dissertation was to understand how …
Disentangling The Abundance–Impact Relationship For Invasive Species, Bethany A. Bradley, Brittany B. Laginhas, Raj Whitlock, Jenica M. Allen, Amanda E. Bates, Genevieve Bernatchez, Jeffrey M. Diez, Regan Early, Jonathan Lenoir, Montserrat Vilà, Cascade J.B. Sorte
Disentangling The Abundance–Impact Relationship For Invasive Species, Bethany A. Bradley, Brittany B. Laginhas, Raj Whitlock, Jenica M. Allen, Amanda E. Bates, Genevieve Bernatchez, Jeffrey M. Diez, Regan Early, Jonathan Lenoir, Montserrat Vilà, Cascade J.B. Sorte
Environmental Conservation Faculty Publication Series
To predict the threat of biological invasions to native species, it is critical that we understand how increasing abundance of invasive alien species (IAS) affects native populations and communities. The form of this relationship across taxa and ecosystems is unknown, but is expected to depend strongly on the trophic position of the IAS relative to the native species. Using a global metaanalysis based on 1,258 empirical studies presented in 201 scientific publications, we assessed the shape, direction, and strength of native responses to increasing invader abundance. We also tested how native responses varied with relative trophic position and for responses …
Effects Of Urbanization On Native Bird Species In Three Southwestern Us Cities, Christopher B. Hensley, Christopher H. Trisos, Paige S. Warren, Jennie Macfarland, Steve Blumenshine, Joshua Reece, Madhusudan Katti
Effects Of Urbanization On Native Bird Species In Three Southwestern Us Cities, Christopher B. Hensley, Christopher H. Trisos, Paige S. Warren, Jennie Macfarland, Steve Blumenshine, Joshua Reece, Madhusudan Katti
Environmental Conservation Faculty Publication Series
Urbanization presents novel challenges to native species by altering both the biotic and abiotic environment. Studies have attempted to make generalizations about how species with similar traits respond to urbanization, although existing results are idiosyncratic across cities and often fail to account for seasonality. Here, we present a comparative study in three US cities: Fresno, California; Tucson, Arizona; and Phoenix, Arizona. Using presence-absence data to define regional bird species pools and urban assemblages in non-breeding (winter) and breeding (spring) seasons, we tested whether urban avian assemblages were a random subset of regional assemblages on the basis of both traits and …
Visual Head Counts: A Promising Method For Efficient Monitoring Of Diamondback Terrapins, Patricia Levasseur, Sean Sterrett, Chris Sutherland
Visual Head Counts: A Promising Method For Efficient Monitoring Of Diamondback Terrapins, Patricia Levasseur, Sean Sterrett, Chris Sutherland
Environmental Conservation Faculty Publication Series
Determining the population status of the diamondback terrapin (Malaclemys terrapin spp.) is challenging due to their ecology and limitations associated with traditional sampling methods. Visual counting of emergent heads offers a promising, efficient, and non-invasive method for generating abundance estimates of terrapin populations across broader spatial scales than has been achieved using capture–recapture, and can be used to quantify determinants of spatial variation in abundance. We conducted repeated visual head count surveys along the shoreline of Wellfleet Bay in Wellfleet, Massachusetts, and analyzed the count data using a hierarchical modeling framework designed specifically for repeated count data: the N-mixture model. …
Accounting For Aboveground Carbon Storage In Shrubland And Woodland Ecosystems In The Great Basin, Emily J. Fusco, Benjamin M. Rau, Michael Falkowski, Steven Filippelli, Bethany A. Bradley
Accounting For Aboveground Carbon Storage In Shrubland And Woodland Ecosystems In The Great Basin, Emily J. Fusco, Benjamin M. Rau, Michael Falkowski, Steven Filippelli, Bethany A. Bradley
Environmental Conservation Faculty Publication Series
Improving the accuracy of carbon accounting in terrestrial ecosystems is critical for understanding carbon fluxes associated with land cover change, with significant implications for global carbon cycling and climate change. Semi‐arid ecosystems account for an estimated 45% of global terrestrial ecosystem area and are in many locations experiencing high degrees of degradation. However, aboveground carbon accounting has largely focused on tropical and forested ecosystems, while drylands have been relatively neglected. Here, we used a combination of field estimates, remotely sensed data, and existing land cover maps to create a spatially explicit estimate of aboveground carbon storage within the Great Basin, …