Digital Commons Network^™

New Hampshire Center For Freshwater Biology And Lakes Lay Monitoring Program Programmatic Qapp 2021, Robert Craycraft, Jeffrey A. Schloss

UNH Cooperative Extension

No abstract provided.

New Hampshire Center For Freshwater Biology And Lakes Lay Monitoring Program Programmatic Quality Assurance Project Plan (Qapp) Appendices, Robert Craycraft, Jeffrey A. Schloss

UNH Cooperative Extension

No abstract provided.

Depot Pond 2021 Water Quality Highlight Report, Amanda Mcquaid, Robert Craycraft

UNH Cooperative Extension

A Water Quality Highlight Report by UNH CE Lakes Lay Monitoring Program for Depot Pond (of Milton Three Ponds) in Milton, NH in 2021.

Globe And Natural Inquirer Crosswalk Upper Elementary: Phenology, Eliza Balch, Globe U.S. Coordination Office

Teacher Resources

No abstract provided.

2020 U.S. Globe Partner Yearbook, Globe U.S. Coordination Office

Partner Yearbooks

No abstract provided.

Perspective On Nanofiber Electrochemical Sensors: Design Of Relative Selectivity Experiments, Stanley G. Feeney, Joelle M.J. Lafreniere, Jeffrey Mark Halpern

Faculty Publications

The use of nanofibers creates the ability for non-enzymatic sensing in various applications and greatly improves the sensitivity, speed, and accuracy of electrochemical sensors for a wide variety of analytes. The high surface area to volume ratio of the fibers as well as their high porosity, even when compared to other common nanostructures, allows for enhanced electrocatalytic, adsorptive, and analyte-specific recognition mechanisms. Nanofibers have the potential to rival and replace materials used in electrochemical sensing. As more types of nanofibers are developed and tested for new applications, more consistent and refined selectivity experiments are needed. We applied this idea in …

Conway Lake 2021 Water Quality Highlight Report, Amanda Mcquaid, Robert Craycraft

UNH Cooperative Extension

A Water Quality Highlight Report by UNH CE Lakes Lay Monitoring Program for Conway Lake in Conway, NH (Station 2, Gull) in 2021.

North River Lake 2021 Water Quality Full Annual Report, Amanda Mcquaid, Robert Craycraft

UNH Cooperative Extension

A Water Quality Report by UNH CE Lakes Lay Monitoring Program for North River Lake.

Photoreceptor Phosphodiesterase (Pde6): Activation And Inactivation Mechanisms During Visual Transduction In Rods And Cones, Rick H. Cote

Faculty Publications

Rod and cone photoreceptors of the vertebrate retina utilize cGMP as the primary

intracellular messenger for the visual signaling pathway that converts a light stimulus into an electrical response. cGMP metabolism in the signal-transducing photoreceptor outer segment reflects the balance of cGMP synthesis (catalyzed by guanylyl cyclase) and degradation (catalyzed by the photoreceptor phosphodiesterase, PDE6). Upon light stimulation, rapid activation of PDE6 by the heterotrimeric G-protein (transducin) triggers a dramatic drop in cGMP levels that lead to cell hyperpolarization. Following cessation of the light stimulus, the lifetime of activated PDE6 is also precisely regulated by additional processes. This review summarizes …

Loon Lake 2021 Water Quality Full Annual Report, Amanda Mcquaid, Robert Craycraft

UNH Cooperative Extension

A Water Quality Report by UNH CE Lakes Lay Monitoring Program for Loon Lake in Effingham, NH.

Northeast Pond 2021 Water Quality Highlight Report, Amanda Mcquaid, Robert Craycraft

UNH Cooperative Extension

A Water Quality Highlight Report by UNH CE Lakes Lay Monitoring Program for Northeast Pond (of Milton Three Ponds) in Milton, NH in 2021.

Photoreceptor Phosphodiesterase (Pde6): Structure, Regulatory Mechanisms, And Implications For Treatment Of Retinal Diseases, Rick H. Cote, Richa Gupta, Michael J. Irwin, Xin Wang

Faculty Publications

The photoreceptor phosphodiesterase (PDE6) is a member of large family of Class I phosphodiesterases responsible for hydrolyzing the second messengers cAMP and cGMP. PDE6 consists of two catalytic subunits and two inhibitory subunits that form a tetrameric protein. PDE6 is a peripheral membrane protein that is localized to the signaling-transducing compartment of rod and cone photoreceptors. As the central effector enzyme of the G-protein coupled visual transduction pathway, activation of PDE6 catalysis causes in a rapid decrease in cGMP levels that results in closure of cGMP-gated ion channels in the photoreceptor plasma membrane. Because of its importance in the phototransduction …

Weaving Strands Of Knowledge: Leaning About Environmental Change In The Bhutan Himalayas, Sameer Honwad, Andrew D. Coppens, Greg Defrancis, Marcos Stafne Montshire, Shivaraj Bhattarai

Faculty Publications

Climate change is a complex phenomenon, so much so that even those with expert knowledge on the scientific data struggle to understand the impacts of climate change on their everyday lives. Contradictions across systems of knowledge make clear that climate change is not just a problem of scientific understanding but is also simultaneously a problem of global coordination as well as a sociopolitical problem of connecting domains of knowledge that are seldom valued equitably. The project described in this paper is a prototype effort to put knowledge from community members in two culturally distinct rural areas of the world at …

Not Clamming Up, Beth Potier

UNH Today Archive

No abstract provided.

Majority In Nh Plan To Get Covid-19 Vaccine When Available 12/14/2020, Unh Survey Center

All UNH Survey Center Polls

A majority of New Hampshire residents say they will get a COVID-19 vaccine when one is available, however, some groups remain unwilling to get a vaccine. Respondents most frequently cite their PCP, Dr. Fauci, New Hampshire epidemiologist Dr. Benjamin Chan, or their friends and family as people whose endorsement would make them more likely to get vaccinated. Those who are currently unwilling to get vaccinated say they are not likely to be convinced to do so by anyone. Republicans and Democrats disagree about the pandemic as a majority of Republicans believe the danger posed by COVID-19 is exaggerated and has …

Office Of Research, Economic Engagement And Outreach Update, December 9, 2020, Office Of Research, Economic Engagement And Outreach

Office of Research, Economic Engagement and Outreach

No abstract provided.

Convergence: Eos News And Updates, December 2020, Unh Institute For The Study Of Earth, Oceans And Space

Convergence: EOS News and Updates

No abstract provided.

Obtaining A Reference For Calibrating Broadband Multibeam Seabed Backscatter, Ivan Bodra Guimaraes

Master's Theses and Capstones

Standard calibration procedures for multibeam sonars currently only address the fidelity of the bathymetric data. Equivalent effort is needed to ensure that the acquired seabed backscatter strength measurements are referenced to a similarly precise level. This thesis presents an operational method for acquiring reference seabed backscatter data utilizing multiple pre-calibrated split beam echo sounders covering a wide range (45-450 kHz) of frequencies. This is needed to cover the full range of frequencies utilized by multi-sector multibeam systems operating in continental shelf depths.The method considers both the frequency and the angle of incidence dependence of the backscatter strength of a homogenous …

Physiological And Predicted Metagenomic Analysis Of Soil Aggregate Microbial Communities Under Different Tillage Regimes, Lukas Bernhardt

Master's Theses and Capstones

Soils are spatially heterogeneous environments, and the distribution of microorganisms and carbon is organized at the scale of millimeters in soil aggregates. The physio-chemical environment within macroaggregates and microaggregates differ, which may lead to the selection of microbial communities with different survival and growth strategies- here termed life history strategies. Using an aggregate scale survey of microbial communities in agricultural soils, I show that soil aggregates harbor distinct communities with life history characteristics that align with the Yield, Acquisition, Stress tolerator framework (Y-A-S). Soils collected from an eight- year tillage experiment were isolated into four aggregate size classes and physiological …

Geodermatophilaceae Biofilm Formation And Rock Recolonization, Krista Greengrass

Master's Theses and Capstones

The Geodermatophilaceae genera—Geodermatophilus, Blastococcus, and Modestobacter—live on rock surfaces and create biofilms that deteriorate stone architecture and monuments. Their biofilms increase the rate of weathering and erosion but are not well studied. Recently, thirteen strains were isolated, and their genomes sequenced. These new Geodermatophilaceae isolates along with Modestobacter marinus strain BC501 and Blastococcus saxobsidens strain DD2 were used in this study to evaluate biofilm formation under different environmental factors including temperature, light, and salt and heavy metal exposure. Ten isolates were used for experiments to recolonize back onto the rock substrates from which the isolates were obtained. For most of …

Immunohistochemical Characterization Of A Novel Population Of Reticular Thalamic Neurons Expressing Cholecystokinin And Type 1 Cannabinoid Receptors, Shayna Mallat

Master's Theses and Capstones

The thalamic reticular nucleus (TRN) filters somatosensory stimuli by providing inhibition to the excitatory thalamic relay nuclei, which then communicate with the cortex to appropriately integrate and respond to sensory stimuli. The TRN is also responsible for generating and maintaining sleep spindles, which are important for memory and cognition, and are disrupted in various psychiatric disorders. Previous studies have shown that the TRN is comprised of several neuronal subpopulations that carry out specific functions. These neurons can be distinguished using peptide markers such as parvalbumin (PV), somatostatin (SST), and calbindin (CB). In this thesis, I identified a novel neuronal population …

In A Nutshell: Nutritional And Environmental Factors Impacting Small Mammal Seed Selection In Northeastern Forests, Nicholas Bryan Moore

Master's Theses and Capstones

Rodents often play vital roles in their ecosystems as seed predators and dispersers and can significantly influence the succession and assembly of plant communities. We conducted seed tray experiments to assess the nutritional and environmental factors that influence selection and foraging time of three common rodent granivores: the white-footed mouse (Peromyscus leucopus), the deer mouse (Peromyscus maniculatus), and the southern red-backed vole (Myodes gapperi) for three common seeds: American beech (Fagus grandifolia), red maple (Acer rubrum), and eastern hemlock (Tsuga canadensis). This work was conducted at Bartlett Experimental Forest located within White Mountain National Forest in New Hampshire. Using mixed-effects …

Dynamic Dissolved Organic Matter Response To Increases Of Energy Availability In Forested Headwater Streams, Katherine Xiomara Perez-Rivera

Master's Theses and Capstones

Forested headwater streams receive inputs of dissolved organic matter (DOM) that can be transformed by biota as they are transported downstream. Biotic uptake of ambient DOM is difficult to assess through direct experimentation, as the fate of a specific organic compound added to a stream is unlikely to mirror that of the ambient DOM pool. Here we examined the dynamics of DOM by using a hybrid approach that combines uptake metrics of a simple organic compound with a direct assessment of the effects of adding this presumably labile organic carbon source (acetate) on the ambient DOM pool. We proposed that …

Analysis Of The Population Dynamics Of Placida Dendritica And Codium Fragile In The Gulf Of Maine And A Theoretical Discussion Of Invasive Species, Seth Goodnight

Doctoral Dissertations

This dissertation examines several aspects of the biology and ecology of Codium fragile and Placida dendritica in the Gulf of Maine. Scientific interest in nonindigenous species was examined to determine if any patterns were evident that might indicate a change in the status of an invasive species. Interest in C. fragile had waned in recent years, the timing of which coincides with the decreased ecological dominance and apparent naturalization of the alga. Laboratory and field studies were combined to quantify the dynamics in the population of C. fragile and in the recruitment dynamics of P. dendritica. Results of laboratory research …

Utilizing Extended Continental Shelf (Ecs) And Ocean Exploration Mapping Data For Standardized Marine Ecological Classification Of The U.S. Atlantic Margin, Derek C. Sowers

Doctoral Dissertations

Accurate maps of ocean bathymetry and seafloor habitats are needed to support effective marine ecosystem-based management (EBM) approaches. The central premise of this thesis was to synthesize geomorphological elements of large regions of the deep ocean seafloor to establish standards of characterization for ecosystem-based classification. The approach was to apply semi-automated characterization techniques on seafloor bathymetric data that were originally collected for other purposes. The purpose of generating these maps is ultimately to apply to informing ecosystem-based management for large marine regions. While seafloor classification techniques for habitat classification have been applied in shallow water and generally over more local …

Bacterial Genome And Population Dynamics With Implications For Public Health, Cooper John Park

Doctoral Dissertations

Bacterial populations are extraordinarily heterogeneous. Despite growing clonally, these populations are often composed of multiple lineages distinguished by both phenotypic and genetic differences that are caused by both allelic and whole gene variation. Such genomic mosaicism and within-species variation can significantly impact a species’ response to selective pressures from antibiotic use, vaccination, immune responses and host environment. One important process that contributes to this phenomenon is recombination, the exchange of very similar DNA sequences between strains which can result to either the addition or replacement of homologous genes. Current models of microbial recombination incorporate the null expectation that recombination is …

The Role Of Gli3 In Inflammation, Stephan Josef Matissek

Doctoral Dissertations

Inflammation is an important and healthy mechanism that our body uses for wound-healing and fighting off infections by utilizing molecular pathways of immune and non-immune cells. However, when inflammation is persistent or chronic it can have severe consequences that can lead to auto-immune diseases or cancer. Pathogen-associated molecular patterns (PAMPs), such as Lipopolysaccharide (LPS), present on gramnegative bacteria, or double-stranded RNA (dsRNA), present in RNA-viruses, were shown to be potent inducers of inflammation. These PAMPs are known ligands of Toll like receptor 4 (TLR4), activated by LPS and Toll-like receptor 3 (TLR3), activated by dsRNA which are carried on the …

Taking Nitrogen By Storm: Spatial And Temporal Controls On Nitrogen Processing In A Small Reservoir, Eliza Balch

Master's Theses and Capstones

Nitrate inputs pose a threat to aquatic ecosystems, leading to eutrophication, algal blooms, and habitat loss in downstream coastal marine and estuarine habitats. Rivers and streams can attenuate nitrogen between inputs and coastal outputs, moderating ecosystem harm. While nitrogen dynamics in streams and rivers have been studied for decades, less is known about the wetlands through which they flow, namely small reservoirs. Storms can have a large influence on nitrogen processing in reservoirs through hydrologic changes and introduction of new solute sources, but are poorly understood. To understand the spatial and temporal variability of nitrogen processing in a small reservoir, …

Using Stable Isotopes To Determine Dominant Methane Production Pathways Of Thaw Ponds In A Subarctic Peatland, Kathryn Ann Bennett

Master's Theses and Capstones

Arctic and subarctic ecosystems are currently warming faster than any other region of the globe, accelerating seasonal permafrost thaw. As thaw progresses, small water bodies can form due to slumping of the peatland surface. These ponds emit methane (CH4), a strong, radiatively important trace gas, predominantly through ebullition (bubbling). Two different types of methanogenic Archaea present in these systems produce CH4 through their respective production pathways: acetoclastic and hydrogenotrophic methanogenesis. The acetoclastic pathway forms CH4 using CH3COOH, an organic carbon (C) source while hydrogenotrophic methanogenesis uses CO2, an inorganic C source. Stable isotopes can be used to characterize the relative …

Quantifying The Effects Of Land Use And Flow Regime On Metabolism In New England Streams, Daniel R. Bolster

Master's Theses and Capstones

Metabolism in aquatic ecosystems influences food webs and water quality but is potentially altered by changes in land use and flow regime. The interacting effects of storms and land use on stream metabolism are largely understudied. The goal of this study was to understand how flow variability and land use interact to affect biogeochemical cycling in headwater streams. In situ measurements of stage, water temperature, and dissolved oxygen (DO) were made in three headwater streams draining different land uses (urban, forest, and mixed) and one larger river site from July 2017 to January 2018. All streams were located in the …