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Effects Of Alien Shrubs On Caterpillars And Shrubland-Dependent Passerines Within Three Transmission Line Rights-Of-Way In Southeastern New Hampshire, Matthew Tarr
Doctoral Dissertations
By altering plant species composition and reducing plant species richness, invasion of non-native (alien) plants can reduce caterpillar abundance in bird habitats and simplify the bird community, but whether these cascading effects of alien plants extend further to affect bird productivity has not been quantified. This study is the first to quantify how reduced caterpillar abundance associated with alien plant invasion affects the reproductive success of a breeding passerine, the common yellowthroat (Geothlypis trichas trichas). The study was conducted in three transmission line rights-of-way where plant composition in yellowthroat territories was dominated by a near monoculture of alien shrubs (“ALIEN” …
Evaluating The Use Of Unmanned Aerial Systems (Uas) For Collecting Thematic Mapping Accuracy Assessment Reference Data In New England Forest Communities, Benjamin Thomas Fraser
Evaluating The Use Of Unmanned Aerial Systems (Uas) For Collecting Thematic Mapping Accuracy Assessment Reference Data In New England Forest Communities, Benjamin Thomas Fraser
Master's Theses and Capstones
To overcome the main drivers of global environmental change, such as land use and land cover change, evolving technologies must be adopted to rapidly and accurately capture, process, analyze, and display a multitude of high resolution spatial variables. Remote sensing technologies continue to advance at an ever-increasing rate to meet end-user needs, now in the form of unmanned aerial systems (UAS or drones). UAS have bridged the gap left by satellite imagery, aerial photography, and even ground measurements in data collection potential for all matters of information. This new platform has already been deployed in many data collection scenarios, being …
Understanding The Efficacy Of Fish Ladder Use By Alewife (Alosa Pseudoharengus), Kevin M. Sullivan
Understanding The Efficacy Of Fish Ladder Use By Alewife (Alosa Pseudoharengus), Kevin M. Sullivan
Master's Theses and Capstones
River herring, the collective name given to North American populations of Alewife (Alosa pseudoharengus) and Blueback Herring (A. aestivalis), are iteroparous, anadromous members of the family Clupeidae, with similar morphology, ecological roles, and overlapping distributions. Once abundant in coastal rivers of New Hampshire, many factors including commercial fishing, habitat degradation, and dam construction resulted in a precipitous decline of the species along the entire coast. Successful efforts to restore populations have included the construction of fish ladders at dams. However, fish ladders require constant operation and maintenance to efficiently pass river herring, and only provide access to spawning habitat up …
Rates And Drivers Of Nitrate Uptake In Fluvial Wetlands In Urbanizing, Coastal Watersheds, Christopher Thomas Whitney
Rates And Drivers Of Nitrate Uptake In Fluvial Wetlands In Urbanizing, Coastal Watersheds, Christopher Thomas Whitney
Master's Theses and Capstones
Humans have had a substantial impact on the global nitrogen cycle, releasing large amounts of reactive nitrogen to the landscape. Watersheds have been found to remove substantial quantities of this anthropogenic nitrogen, with aquatic networks preventing much of it from reaching the coast. Within these aquatic networks, channelized streams have been studied extensively. However, in many coastal watersheds, fluvial wetlands are a large component of the aquatic network yet have not been studied as broadly as channelized reaches. As fluvial wetlands are also likely to have a sizeable impact on river network-scale nitrogen removal, a greater understanding of their effect …
Land Use Change In The Northeast United States: Retaining Forest Structure And Its Soil Hydraulic Properties Through Silvopasture, Anthony John Stewart
Land Use Change In The Northeast United States: Retaining Forest Structure And Its Soil Hydraulic Properties Through Silvopasture, Anthony John Stewart
Master's Theses and Capstones
Growing demand for locally produced agriculture in the Northeast US could result in significant land use change from forests to open pasture and other agricultural uses. This conversion may reduce the soil hydrologic flow due to tree removal and increased soil compaction, leading to increasing surface runoff and erosion. Silvopasture—an agroforestry system that integrates trees with livestock—offers a potentially more sustainable alternative to conversion to open pasture, and has recently gained interest with local land owners and farmers in the region. The retention of trees within pastures may help maintain critical hydrologic functions of forest soils by promoting higher infiltration …