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Articles 1591 - 1620 of 8069
Full-Text Articles in Entire DC Network
N.H. Oyster Farming A Growing Industry, Lori Tyler Gula
N.H. Oyster Farming A Growing Industry, Lori Tyler Gula
UNH Today Archive
No abstract provided.
Unh Researchers Study 2017 Puerto Rico Hurricane To Understand Impact On New England, Lori Tyler Gula
Unh Researchers Study 2017 Puerto Rico Hurricane To Understand Impact On New England, Lori Tyler Gula
Media Relations
No abstract provided.
Unh Researchers Study Puerto Rico Hurricane To Understand Impact Of New England Storms On Watersheds, Lori Wright
Unh Researchers Study Puerto Rico Hurricane To Understand Impact Of New England Storms On Watersheds, Lori Wright
UNH Today Archive
No abstract provided.
Unh: The Magazine Of The University Of New Hampshire, Fall 2019, Unh Magazine
Unh: The Magazine Of The University Of New Hampshire, Fall 2019, Unh Magazine
UNH Magazine
No abstract provided.
Summer At The Stem Lab Through The Eyes Of An Intern, Unh Communications And Public Affairs
Summer At The Stem Lab Through The Eyes Of An Intern, Unh Communications And Public Affairs
UNH Today Archive
No abstract provided.
External And Internal Grouping Characteristics Of Juvenile Walleye Pollock In The Eastern Bering Sea, Sarah C. Stienessen, Christopher D. Wilson, Thomas C. Weber, Julia K. Parrish
External And Internal Grouping Characteristics Of Juvenile Walleye Pollock In The Eastern Bering Sea, Sarah C. Stienessen, Christopher D. Wilson, Thomas C. Weber, Julia K. Parrish
Center for Coastal and Ocean Mapping
Size and shape patterns of fish groups are collective outcomes of interactions among members. Consequently, group-level patterns are often affected when any member responds to changes in their internal state, external state, and environment. To determine how groups of fish respond to components of their physical and ecological environment, and whether the response is influenced by a component of their external state (i.e., fish age), we used a multibeam system to collect three-dimensional grouping characteristics of 5 age categories of juvenile walleye pollock (age 1, age 2, age 3, mixed ages 1 and 2, and mixed ages 2 and 3) …
Small Soil C Cycle Responses To Three Years Of Cover Crops In Maize Cropping Systems, Anna M. Cates, Matthew D. Ruark, A. Stuart Grandy, Randall D. Jackson
Small Soil C Cycle Responses To Three Years Of Cover Crops In Maize Cropping Systems, Anna M. Cates, Matthew D. Ruark, A. Stuart Grandy, Randall D. Jackson
Faculty Publications
Cover crops are touted for their ability to improve many ecosystem functions in annual cropping systems. In addition to water and nutrient retention, cover crops may influence C cycling by increasing total C inputs to the agroecosystem, stimulating microbial populations, altering main crop residue decomposition rate, or changing litter chemistry over time. We assessed whether annual (rye) or perennial (bluegrass) cover crops in maize cropping systems influenced maize residue decomposition (litterbags) or microbial communities (shotgun metagenomics) in soil and litter, and whether these cover crops had an effect on microbially active pools of C: particulate organic matter (POM) C and …
The New Hampshire, Vol. 109 [110], No. 01 (Aug. 22, 2019), The New Hampshire
The New Hampshire, Vol. 109 [110], No. 01 (Aug. 22, 2019), The New Hampshire
The New Hampshire Print Edition
An independent student produced newspaper from the University of New Hampshire. This volume was printed as 109, but it is the 110th volume in the series.
Unh Researcher: Nh Commercial Oyster Farming Gains Ground, Lori Tyler Gula
Unh Researcher: Nh Commercial Oyster Farming Gains Ground, Lori Tyler Gula
Media Relations
No abstract provided.
Nh Commercial Oyster Farming Industry Gains Ground, Has Substantial Growth Potential, Lori Wright
Nh Commercial Oyster Farming Industry Gains Ground, Has Substantial Growth Potential, Lori Wright
UNH Today Archive
No abstract provided.
Envisioning A Healthier Ocean, Rebecca Irelan
Broadband Acoustic Scattering From Oblate Hydrocarbon Droplets, Scott Loranger, Geir Pedersen, Thomas C. Weber
Broadband Acoustic Scattering From Oblate Hydrocarbon Droplets, Scott Loranger, Geir Pedersen, Thomas C. Weber
Center for Coastal and Ocean Mapping
Improved in situ quantification of oil in the marine environment is critical for informing models of fate and transport and evaluating the resiliency of marine communities to oil spills. Broadband acoustic backscatter has been used to quantify a variety of targets in the water column; from fish and planktonic organisms to gas bubbles and oceanic microstructure, and shows promise for use in quantifying oil droplets. Quantifying water column targets with broadband acoustic backscatter relies on accurate models of a target's frequency dependent target strength (TS), a function of the target's acoustic impedance, shape, and size. Previous acoustic quantification of oil …
Assaulted Marsh, Sarah Schaier
Summertime At Woodman Farm, Lori Wright
So Much To Do, So Little Time, Unh Communications And Public Affairs
So Much To Do, So Little Time, Unh Communications And Public Affairs
UNH Today Archive
No abstract provided.
A Glimmer Of Oceanic Hope, Rebecca Irelan
Effect Of Cultivar And Substrate On The Efficacy Of Biopesticides To Suppress Pythium On Greenhouse Crops, Liza May Degenring
Effect Of Cultivar And Substrate On The Efficacy Of Biopesticides To Suppress Pythium On Greenhouse Crops, Liza May Degenring
Master's Theses and Capstones
Oomycetes, such as Pythium, are soil-borne plant pathogens that can cause significant losses in greenhouse crop production due to their swimming zoospores and wide host range. Additionally, the increasing use of substrates that lack microbial diversity in greenhouse production creates a “biological vacuum” that can reduce the substrate’s capacity to resist microbial invasion by soil-borne diseases. The lack of competition by a natural microbial community and the environmental conditions of greenhouse production creates an ideal situation for the use of biopesticides. Biopesticides are commercial products that use beneficial microorganisms (biocontrol agents) to suppress disease and promote plant health. Greenhouse producers …
Food Safety For New Hampshire Oysters: A Multidisciplinary Perspective, Lia Tosiello
Food Safety For New Hampshire Oysters: A Multidisciplinary Perspective, Lia Tosiello
Master's Theses and Capstones
Oyster aquaculture in New Hampshire is a relatively new industry that has emerged in the last decade. Management of food safety is an integral part of the oyster growing process in this small community. In particular, Vibrio parahaemolyticus is a bacterium that can cause gastrointestinal illness in people who eat raw or undercooked seafood. Recently, New Hampshire created a policy to manage importation of oyster seed for V. parahaemolyticus-related human health concerns. This highlighted a need for data on V. parahaemolyticus in oyster seed. Therefore, the objectives of this research are to examine both social and microbiological aspects of food …
Microbial Communities Regulate Nitrogen Use Efficiency By Balancing Tradeoff Between Resource Acquisition And Growth Rate, Bennett Edward Thompson
Microbial Communities Regulate Nitrogen Use Efficiency By Balancing Tradeoff Between Resource Acquisition And Growth Rate, Bennett Edward Thompson
Master's Theses and Capstones
Microbial nitrogen use efficiency (NUE) is the portion of N uptake that microbes allocate to growth versus mineralize as ammonium and is thus a critical parameter governing the transformation of organic to inorganic nitrogen. Microbial NUE is sensitive to changes in the soil environment, but its microbial controls remain untested. I performed an incubation where identical mesocosms were inoculated with three distinct microbial communities derived from agricultural land management (conventional, organic, and deciduous forest). Through this incubation, I explored three scales at which communities may exercise control over NUE: in how microbes alter their soil environment through system-level processes; through …
Assessing The Agronomic And Ecological Relevance Of Mineral-Associated Organic Matter, Andrea Jilling
Assessing The Agronomic And Ecological Relevance Of Mineral-Associated Organic Matter, Andrea Jilling
Doctoral Dissertations
As the largest terrestrial sink for carbon (C) and a critical source of nitrogen (N) for plants, soil organic matter (SOM) is a major driver of ecosystem function. It is critical to understand the mechanistic controls on SOM in order to improve models of global C cycling and to develop accurate measures of soil fertility. SOM consists of a wide spectrum of compounds, varying in chemical characteristics and function. The chemical and physical fractionation of SOM is a valuable tool for distilling this complexity into meaningful and distinct pools: detrital or particulate organic matter (POM), which contains mostly recent litter …
The Bioaccumulation Of Cyanotoxins In Aquatic Food Webs, Amanda Lee Murby Mcquaid
The Bioaccumulation Of Cyanotoxins In Aquatic Food Webs, Amanda Lee Murby Mcquaid
Doctoral Dissertations
Cyanobacteria are naturally occurring photosynthetic bacteria, ubiquitous in nature. Increases in temperature and nutrients have supported the proliferation of cyanobacterial growth globally, especially in freshwater systems. Many taxa can produce biotoxins referred to as “cyanotoxins”. While toxic cyanobacteria are a growing public health concern, little is known about the accumulation of cyanotoxins in lake food webs. This research investigates the seasonal occurrence and the potential role of toxic cyanobacteria in two lakes of contrasting water qualities and food web structures. Objectives of this study were to test the bioaccumulation of microcystins (MCs) and beta-methyl-alanine-amino acid (BMAA) in zooplankton. I further …
Long-Term Forest Growth And Decadal Soil Chemistry Change Across The White Mountain National Forest, Olivia L. Fraser
Long-Term Forest Growth And Decadal Soil Chemistry Change Across The White Mountain National Forest, Olivia L. Fraser
Doctoral Dissertations
Forest ecosystems are subject to a variety of stressors including human land use, air pollution and climate change. A challenge for detecting temporal change, however, is disentangling heterogeneity at multiple spatial scales. Therefore, we need a better understanding of the mechanisms influencing forest growth and soil formation, how to improve existing long-term sample designs, and quantify variability at multiple spatial scales. Identifying the areal extent of bedrock outcrops and shallow soils has important implications in understanding the spatial dynamics of surrounding vegetation, stream chemistry gradients, and soil properties. Manual methods of delineating bedrock outcrops and associated shallow soil are still …
Molecular Diet Analyses Of North American Bats, Devon O'Rourke
Molecular Diet Analyses Of North American Bats, Devon O'Rourke
Doctoral Dissertations
A food web is a model of the feeding relationships among organisms in an environment. The fidelity of this model is limited principally by the ability to detect these interactions. Researchers who study cryptic interactions such as nocturnal insectivory in bats typically rely on fecal samples to identify trophic connections. Historically these diet analyses were limited to morphological inspection of arthropod fragments, however modern metabarcoding techniques have improved the richness and specificity of consumed prey: rather than bats foraging for a few arthropod orders, we observe hundreds of species among guano samples. Animal metabarcoding is not without bias; nevertheless, a …
Striped Bass Strain Effects On Aquaculture Performance Traits, Stress Responsiveness And Hybrid Offspring Growth, Linas Kenter
Striped Bass Strain Effects On Aquaculture Performance Traits, Stress Responsiveness And Hybrid Offspring Growth, Linas Kenter
Doctoral Dissertations
Striped bass (Morone saxatilis) and their hybrids have been well studied and are widely cultured as a food and gamefish. Recent increases in striped bass aquaculture have generated interest in domestication programs where growth performance and stress tolerance are among the traits of interest. Unique geographic stocks, or strains have previously been identified and these populations will presumably exhibit distinct culture traits across different environments. Before application of genetic principles, domestication programs should begin by evaluating available strains for superior performance in the environments intended to be utilized during culture. In this effort, a series of experiments were conducted to …
Mammals On Mountainsides Revisited: Analyzing Multiple Dimensions Of Diversity To Gain New Insight On Community Assembly And Biogeography, Brooks Kohli
Doctoral Dissertations
Understanding how biodiversity is distributed, maintained, and altered is a fundamental goal of ecology and is especially important for predicting the effects of ongoing rapid environmental change. Traditionally, diversity has been described in taxonomic terms using the number and abundance of species (e.g., species richness). However, biodiversity is multi-faceted and includes functional (ecological traits) and phylogenetic (evolutionary relationships) dimensions that emphasize the similarities and differences among species. Functional diversity is particularly appealing because it quantifies the range and prevalence of traits in an assemblage and helps link patterns of diversity to the ecological processes that generate them. I used a …
Advancing The Terrestrial Ecological Unit Inventory Within The White Mountain National Forest Using Lidar, Robert Andrew Colter
Advancing The Terrestrial Ecological Unit Inventory Within The White Mountain National Forest Using Lidar, Robert Andrew Colter
Doctoral Dissertations
Forest land managers need ecological classification to assess and describe resource conditions, vegetation conditions, outcomes resulting from various management prescription scenarios, and communicate environmental effects of land management planning alternatives. However, there is a need to incorporate more ecological classification into the land management plans. The U.S. Forest Service’s approach, the Terrestrial Ecological Unit Inventory (TEUI), relies heavily on field data collection and verification of map unit delineations that is time-consuming and costly. Traditional mapping methods far exceed the current financial capacity of the U.S. Forest Service. In order to justify new ecological classification mapping approaches, there needs to be …
Mechanism Of By Product Formation From Different Water Matrices By Chlorination And Chloramination, Victoria Jane Hawkes
Mechanism Of By Product Formation From Different Water Matrices By Chlorination And Chloramination, Victoria Jane Hawkes
Master's Theses and Capstones
Application of chlorine-based disinfection to drinking water and wastewater leads to the formation of disinfection by-products that are harmful to human health. This paper presents research performed on the formation mechanisms of trihalomethanes (THMs) and nitrosamines (specifically NDMA) from chlorine-based disinfection practices. The formation of THMs and nitrosamines was investigated under a range of water matrices and disinfection conditions by developing a set of laboratory prepared water matrices containing natural organic matter (NOM), bromide and ammonium. In addition, two pretreated surface waters and one secondary treated wastewater effluent were selected to link experimental results to practice. THMs and nitrosamines were …
Assessing Disease Concerns On Quinoa And Evaluating Sources Of Disease Resistance In Chenopodium Species In New England, Haley Breanne Nolen
Assessing Disease Concerns On Quinoa And Evaluating Sources Of Disease Resistance In Chenopodium Species In New England, Haley Breanne Nolen
Master's Theses and Capstones
Quinoa (Chenopodium quinoa Willd.) is a potential new crop for New England because of its high nutritional qualities and environmental adaptability; however, its susceptibility to disease such as downy mildew, caused by Peronospora variabilis Gaum is a significant obstacle. Downy mildew is a key disease of quinoa causing yield reductions up to 33% in tolerant varieties and 99% yield loss in susceptible varieties. Warm temperatures and high humidity in New England provide optimum conditions for pathogen infection and spread, negatively impacting quinoa growth and yield. This pathogen is able to persist in the seed coat of quinoa and overwinter in …
The Impacts Of Terrestrial Invasive Plants On Streams And Natural And Restored Riparian Forests In Northern New England, Chad Frederick Hammer
The Impacts Of Terrestrial Invasive Plants On Streams And Natural And Restored Riparian Forests In Northern New England, Chad Frederick Hammer
Master's Theses and Capstones
Non-native invasive species are a major cause of ecosystem degradation and impairment of ecosystem service benefits in the United States. Riparian areas are at high risk for invasion because they are among the most human-disturbed ecosystems in the world. Forested riparian areas provide us with many ecosystem services and are vital to streams and rivers as they increase habitat complexity and available resources for organisms of many trophic levels. In this study, I quantified the impacts of terrestrial invasive plant invasions by Japanese knotweed and woody invasive plant species on riparian forest structure, stream physical habitat, soil structure, and soil …
Evaluating Wood Fiber Soilless Substrates For Effects On Plant Performance And Nutrient Management In Container Crops, Crysta Harris
Evaluating Wood Fiber Soilless Substrates For Effects On Plant Performance And Nutrient Management In Container Crops, Crysta Harris
Master's Theses and Capstones
Sphagnum peat moss is the most commonly used soilless substrate component to produce containerized greenhouse bedding plants. Perlite is often blended with peat to achieve desirable physical properties. Increasing transportation costs and occasional shortages of peat and perlite have increased the need for alternative substrate components. Wood fiber materials produced from the extensive secondary processing of pine wood chips are a potential partial alternative to peat and perlite. Incorporating wood materials into soilless substrates may result in nitrogen immobilization, increasing the amount of fertilizer nitrogen needed during production. Wood materials also have a naturally higher pH compared to peat, requiring …