Hershey, Anne

uncg

There are 16 item/s.

TitleDateViewsBrief Description
An examination of the influence of thermokarst activity on arctic lake sediment methanogenesis 2009 2023 Accelerated warming in the Arctic contributes to the formation of landscape features known as thermokarsts, or ground surface depressions created by the thermal degradation of permafrost. As a significant portion of the global carbon pool is stored i...
Retention of Lake-derived Nitrogen in Arctic Streams with Different Geomorphic Settings Using a 15N Stable Isotope Tracer 2010 1175 Retention of lake-derived nitrogen (N) was studied in four geomorphically distinct lake outlets located in arctic Alaska. 15N ammonium chloride tracer was experimentally added to Lakes NE-12, GTH 99, GTH 153 and GTH 114 at the beginning of the arctic...
Coal ash derived sulfur and mercury in the Dan River invertebrate food web 2017 536 In February of 2014, a coal ash spill occurred in the Dan River in Eden, NC. Coal ash is a potential sulfur and heavy metal source and can disrupt aquatic and riparian food webs. Sulfur can stimulate mercury methylation, which bioaccumulates in the f...
Potential effects of the invasive bivalve, Corbicula fluminea, on methane cycle processes in an urban stream 2018 294 Methanogenesis, subsequent methane oxidation and flux from sediments are subject to local biogeochemical conditions in streams. The invasive bivalve, Corbicula fluminea, has been shown to affect stream biogeochemistry and may have a density dependent...
The effects of methane producers and consumers on the diet of Chironomus larvae in an Arctic lake 2010 1949 Up to 40% of methane produced in aquatic systems is oxidized before it is released into the atmosphere. Microbial oxidation of methane is an important sink and potentially an important pathway for the incorporation of detrital carbon into aquatic foo...
Methane and methylmercury production potentials in North Carolina Piedmont stream sediments 2016 177 Methylated mercury (MeHg) is produced by sulfate reducing bacteria (SRB), iron reducing bacteria (FeRB), methane producing Archaea (MPA), and other microbes under anaerobic conditions. These microbial groups compete for substrates including hydrogen ...
Linking methane concentration and stable isotope distribution to methane derived carbon in food webs in North Carolina Piedmont streams 2018 275 In streams, a portion of methane produced by methanogens can be oxidized by MOB. When consumers eat these bacteria, MDC is routed into the aquatic food web. The goal of this study was to determine the distribution and stable isotope signature of meth...
Impacts of triclosan on stream microbial communities: investigating mitigation and multidrug resistance 2018 927 Countless chemical compounds and their derivatives are present in wastewater (WW) systems and other environments due to anthropogenic inputs from a vast array of product ingredients. In streams and WW treatment plants (WWTPs), microbial communities t...
The Effects of Restoration Structures on Nutrient Uptake and Macroinvertebrate Communities in Restored Urban Streams in Greensboro, North Carolina 2007 2485 Urban stream restoration projects have been undertaken to improve physical, chemical, and biological integrity, but there has been little assessment of the effectiveness of these projects in restoring ecological function. I looked at the effect of re...
The Importance of Biogenic Methane and Sedimentation to Benthic Chironomid Larvae in Four Reservoirs 2007 3289 The biogenic production and subsequent oxidation of methane in aquatic sediments are important microbial processes that contribute to the global carbon cycle and play a significant role in the natural flux of methane to the atmosphere. I studied the ...
Assimilation of particulate and dissolved basal carbon resources by Sphaerium nitidium and Grensia praeterita in an arctic lake 2008 1981 During the summer 2006, I tested the importance of dissolved and particulate basal carbon sources to the caddisfly, Grensia praeterita, and the fingernail clam, Sphaerium nitidium, using intact sediment cores in a 1-month incubation...
Evaluation of factors controlling methanogens and methane-oxidizing bacteria on hydropsychid caddisfly retreats 2015 512 Biogenic methane is produced in aquatic sediments by methanogenic Archaea, and captured by methane-oxidizing bacteria (MOB), thereby cycling methane into food webs. Preliminary work has shown that net-spinning caddisfly (Trichoptera: Hydropsychidae) ...
The presence, bioavailability, and impact of antibiotics in rural and urban streams of North Carolina 2020 270 Antibiotic pollution in stream ecosystems in the United States remains a research area that has received little attention. The presence of antibiotics in streams presents a vehicle for these contaminants to be transferred from inland areas to coastal...
Potential role of methane-derived carbon as a food source for Daphnia in a North Carolina reservoir 2010 1836 Herbivorous zooplankton feed on seston, including algal, detrital, and bacterial components. However, many studies have found that Daphnia del13C is more depleted than seston del13C, and selective feeding on seston algal components has been hypothesi...
Piscivore effect on size distribution and planktivorous behavior of slimy sculpin in arctic Alaskan lakes 2010 1610 Slimy sculpin (Cottus cognatus) are known as a bottom-dwelling fish that feed primarily on benthic invertebrates. However, in arctic lakes, sculpin may also be somewhat planktivorous. Previous studies have shown that the habitat distribution of sculp...
Impact of Corbicula fluminae (Asian clam) on particulate matter transport in an urban stream. 2010 1911 Wastewater treatment plant (WWTP) effluent is a significant source of anthropogenic N loading to urban streams and has been shown to impact the ability of streams to provide ecosystem services of nutrient retention and denitrification. If a stream is...