Open Access. Powered by Scholars. Published by Universities.®

Terrestrial and Aquatic Ecology Commons™

Open Access. Powered by Scholars. Published by Universities.®

Discipline
Institution
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 1681 - 1710 of 6337

Full-Text Articles in Terrestrial and Aquatic Ecology

Habitat Selection By Vulnerable Golden Bandicoots In The Arid Zone, Cheryl A. Lohr, Kristen Nilsson, Colleen Sims, Judy Dunlop, Michael T. Lohr Jan 2021

Habitat Selection By Vulnerable Golden Bandicoots In The Arid Zone, Cheryl A. Lohr, Kristen Nilsson, Colleen Sims, Judy Dunlop, Michael T. Lohr

Research outputs 2014 to 2021

In 2010, vulnerable golden bandicoots (Isoodon auratus) were translocated from Barrow Island, Western Australia, to a mainland predator-free enclosure on the Matuwa Indigenous Protected Area. Golden bandicoots were once widespread throughout a variety of arid and semiarid habitats of central and northern Australia. Like many small-to-medium-sized marsupials, the species has severely declined since colonization and has been reduced to only four remnant natural populations. Between 2010 and 2020, the reintroduced population of golden bandicoots on Matuwa was monitored via capture–mark–recapture data collection, which was used in spatially explicit capture–recapture analysis to monitor their abundance over time. In 2014, we used …

Go to article

Natural Habitat Of Bali Starling (Leucopsar Rothschildi) In Bali Barat National Park, Indonesia, Sutomo Sutomo, Eddie Van Etten Jan 2021

Natural Habitat Of Bali Starling (Leucopsar Rothschildi) In Bali Barat National Park, Indonesia, Sutomo Sutomo, Eddie Van Etten

Research outputs 2014 to 2021

The Indonesian tropical savannas and dry forests provide habitats to various endemic wildlife. Unfortunately, a few of these endemic species are now seriously threatened and are red listed in the conservation status of International Union for Conservation of Nature (IUCN). Among these species, the Bali starling or Bali mynah Leucopsar rotschildi, locally known as Jalak Bali, is now mostly restricted to the Bali Barat National Park. Given the high extinction risk faced by such species, conservation programs require multidisciplinary approaches that would address both the biological attributes of the species itself and their habitat requirements. Regrettably, for many species, their …

Go to article

The Renaissance Of Odum's Outwelling Hypothesis In 'Blue Carbon' Science, Isaac R. Santos, David J. Burdige, Tim C. Jennerjahn, Steven Bouillon, Alex Cabral, Oscar Serrano, Thomas Wernberg, Karen Filbee-Dexter, Julia A. Guimond, Joseph J. Tamborski Jan 2021

The Renaissance Of Odum's Outwelling Hypothesis In 'Blue Carbon' Science, Isaac R. Santos, David J. Burdige, Tim C. Jennerjahn, Steven Bouillon, Alex Cabral, Oscar Serrano, Thomas Wernberg, Karen Filbee-Dexter, Julia A. Guimond, Joseph J. Tamborski

Research outputs 2014 to 2021

The term ‘Blue Carbon’ was coined about a decade ago to highlight the important carbon sequestration capacity of coastal vegetated ecosystems. The term has paved the way for the development of programs and policies that preserve and restore these threatened coastal ecosystems for climate change mitigation. Blue carbon research has focused on quantifying carbon stocks and burial rates in sediments or accumulating as biomass. This focus on habitat-bound carbon led us to losing sight of the mobile blue carbon fraction. Oceans, the largest active reservoir of carbon, have become somewhat of a blind spot. Multiple recent investigations have revealed high …

Go to article

Heterogeneous Tidal Marsh Soil Organic Carbon Accumulation Among And Within Temperate Estuaries In Australia, Connor Gorham, Paul S. Lavery, Jeffrey J. Kelleway, Pere Masque, Oscar Serrano Jan 2021

Heterogeneous Tidal Marsh Soil Organic Carbon Accumulation Among And Within Temperate Estuaries In Australia, Connor Gorham, Paul S. Lavery, Jeffrey J. Kelleway, Pere Masque, Oscar Serrano

Research outputs 2014 to 2021

The scarcity of data on tidal marsh soil accumulation rates (SAR) and soil organic carbon accumulation rates (CAR) globally precludes a comprehensive assessment of the role of tidal marshes in climate change mitigation and adaptation. Particularly few data exist from the southern hemisphere and for Australia in particular, which contains ~24% of globally recognised tidal marsh extent. Here we estimate SAR and CAR over the last 70 years using 210Pb-based geochronologies in temperate estuarine tidal marsh ecosystems in southern Western Australia (WA). Specifically, we assessed tidal marsh ecosystems situated in two geomorphic settings (marine vs. fluvial deltas) within 10 wave-dominated, …

Go to article

Viral-Mediated Microbe Mortality Modulated By Ocean Acidification And Eutrophication: Consequences For The Carbon Fluxes Through The Microbial Food Web, Andrea Malits, Julia A. Boras, Vanessa Balagué, Eva Calvo, Josep M. Gasol, Cèlia Marrasé, Carles Pelejero, Jarone Pinhassi, Maria Montserrat Sala, Dolors Vaqué Jan 2021

Viral-Mediated Microbe Mortality Modulated By Ocean Acidification And Eutrophication: Consequences For The Carbon Fluxes Through The Microbial Food Web, Andrea Malits, Julia A. Boras, Vanessa Balagué, Eva Calvo, Josep M. Gasol, Cèlia Marrasé, Carles Pelejero, Jarone Pinhassi, Maria Montserrat Sala, Dolors Vaqué

Research outputs 2014 to 2021

Anthropogenic carbon emissions are causing changes in seawater carbonate chemistry including a decline in the pH of the oceans. While its aftermath for calcifying microbes has been widely studied, the effect of ocean acidification (OA) on marine viruses and their microbial hosts is controversial, and even more in combination with another anthropogenic stressor, i.e., human-induced nutrient loads. In this study, two mesocosm acidification experiments with Mediterranean waters from different seasons revealed distinct effects of OA on viruses and viral-mediated prokaryotic mortality depending on the trophic state and the successional stage of the plankton community. In the winter bloom situation, low …

Go to article

Accounting For The Influence Of Temperature And Location When Predicting Seagrass (Halophila Ovalis) Photosynthetic Performance, Nicole E. Said, Kathryn Mcmahon, Paul Lavery Jan 2021

Accounting For The Influence Of Temperature And Location When Predicting Seagrass (Halophila Ovalis) Photosynthetic Performance, Nicole E. Said, Kathryn Mcmahon, Paul Lavery

Research outputs 2014 to 2021

We show that the effect of temperature on photosynthesis of a widely distributed and ecological important seagrass species was not consistent among locations, with some evidence of acclimation to the local temperature range. This has important implications for modelling seagrass productivity and the impacts of light reduction on seagrass ecosystems. Reduced light availability is one of the main pressures negatively impacting on seagrass meadows worldwide. Our knowledge of seagrass photosynthetic characteristics is critical to predicting and managing impacts of light reducing activities but suffers from two critical information gaps: first, data is overwhelmingly derived from studies of leaf tissue and …

Go to article

Deep Ocean Metagenomes Provide Insight Into The Metabolic Architecture Of Bathypelagic Microbial Communities, Silvia G. Acinas, Pablo Sánchez, Guillem Salazar, Francisco M. Cornejo-Castillo, Marta Sebastián, Ramiro Logares, Marta Royo-Llonch, Lucas Paoli, Shinichi Sunagawa, Pascal Hingamp, Hiroyuki Ogata, Gipsi Lima-Mendez, Simon Roux, José M. González, Jesús M. Arrieta, Intikhab S. Alam, Allan Kamau, Chris Bowler, Jeroen Raes, Stéphane Pesant, Peer Bork, Susana Agustí, Takashi Gojobori, Dolors Vaqué, Matthew B. Sullivan, Carlos Pedrós-Alió, Ramon Massana, Carlos M. Duarte, Josep M. Gasol Jan 2021

Deep Ocean Metagenomes Provide Insight Into The Metabolic Architecture Of Bathypelagic Microbial Communities, Silvia G. Acinas, Pablo Sánchez, Guillem Salazar, Francisco M. Cornejo-Castillo, Marta Sebastián, Ramiro Logares, Marta Royo-Llonch, Lucas Paoli, Shinichi Sunagawa, Pascal Hingamp, Hiroyuki Ogata, Gipsi Lima-Mendez, Simon Roux, José M. González, Jesús M. Arrieta, Intikhab S. Alam, Allan Kamau, Chris Bowler, Jeroen Raes, Stéphane Pesant, Peer Bork, Susana Agustí, Takashi Gojobori, Dolors Vaqué, Matthew B. Sullivan, Carlos Pedrós-Alió, Ramon Massana, Carlos M. Duarte, Josep M. Gasol

Research outputs 2014 to 2021

The deep sea, the largest ocean’s compartment, drives planetary-scale biogeochemical cycling. Yet, the functional exploration of its microbial communities lags far behind other environments. Here we analyze 58 metagenomes from tropical and subtropical deep oceans to generate the Malaspina Gene Database. Free-living or particle-attached lifestyles drive functional differences in bathypelagic prokaryotic communities, regardless of their biogeography. Ammonia and CO oxidation pathways are enriched in the free-living microbial communities and dissimilatory nitrate reduction to ammonium and H2 oxidation pathways in the particle-attached, while the Calvin Benson-Bassham cycle is the most prevalent inorganic carbon fixation pathway in both size fractions. Reconstruction of …

Go to article

Aquatic Ecosystems Of The Anthropocene: Limnology And Microbial Ecology Of Mine Pit Lakes, Melanie L. Blanchette, Mark A. Lund Jan 2021

Aquatic Ecosystems Of The Anthropocene: Limnology And Microbial Ecology Of Mine Pit Lakes, Melanie L. Blanchette, Mark A. Lund

Research outputs 2014 to 2021

Mine pit lakes (‘pit lakes’) are new aquatic ecosystems of the Anthropocene. Potentially hundreds of meters deep, these lakes are prominent in the landscape and in the public consciousness. However, the ecology of pit lakes is underrepresented in the literature. The broad goal of this research was to determine the environmental drivers of pelagic microbe assemblages in Australian coal pit lakes. The overall experimental design was four lakes sampled three times, top and bottom, in 2019. Instrument chains were installed in lakes and measurements of in situ water quality and water samples for metals, metalloids, nutrients and microbe assemblage were …

Go to article

Insights Into The Cultured Bacterial Fraction Of Corals, Michael Sweet, Helena Villela, Tina Keller-Costa, Rodrigo Costa, Stefano Romano, David G. Bourne, Anny Cárdenas, Megan J. Huggett, Allison H. Kerwin, Felicity Kuek, Mónica Medina, Julie L. Meyer, Moritz Müller, F. Joseph Pollock, Michael S. Rappé, Mathieu Sere, Koty H. Sharp, Christian R. Voolstra, Nathan Zaccardi, Maren Ziegler, Raquel Peixoto Jan 2021

Insights Into The Cultured Bacterial Fraction Of Corals, Michael Sweet, Helena Villela, Tina Keller-Costa, Rodrigo Costa, Stefano Romano, David G. Bourne, Anny Cárdenas, Megan J. Huggett, Allison H. Kerwin, Felicity Kuek, Mónica Medina, Julie L. Meyer, Moritz Müller, F. Joseph Pollock, Michael S. Rappé, Mathieu Sere, Koty H. Sharp, Christian R. Voolstra, Nathan Zaccardi, Maren Ziegler, Raquel Peixoto

Research outputs 2014 to 2021

Bacteria associated with coral hosts are diverse and abundant, with recent studies suggesting involvement of these symbionts in host resilience to anthropogenic stress. Despite their putative importance, the work dedicated to culturing coral-associated bacteria has received little attention. Combining published and unpublished data, here we report a comprehensive overview of the diversity and function of culturable bacteria isolated from corals originating from tropical, temperate, and cold-water habitats. A total of 3,055 isolates from 52 studies were considered by our metasurvey. Of these, 1,045 had full-length 16S rRNA gene sequences, spanning 138 formally described and 12 putatively novel bacterial genera across …

Go to article

A Temporal Record Of Microplastic Pollution In Mediterranean Seagrass Soils, Martin Dahl, Sanne Bergman, Mats Björk, Elena Diaz-Almela, Maria Granberg, Martin Gullström, Carmen Leiva-Dueñas, Kerstin Magnusson, Candela Marco-Méndez, Nerea Piñeiro-Juncal, Miguel Ángel Mateo Jan 2021

A Temporal Record Of Microplastic Pollution In Mediterranean Seagrass Soils, Martin Dahl, Sanne Bergman, Mats Björk, Elena Diaz-Almela, Maria Granberg, Martin Gullström, Carmen Leiva-Dueñas, Kerstin Magnusson, Candela Marco-Méndez, Nerea Piñeiro-Juncal, Miguel Ángel Mateo

Research outputs 2014 to 2021

© 2021 Elsevier Ltd Plastic pollution is emerging as a potential threat to the marine environment. In the current study, we selected seagrass meadows, known to efficiently trap organic and inorganic particles, to investigate the concentrations and dynamics of microplastics in their soil. We assessed microplastic contamination and accumulation in 210Pb dated soil cores collected in Posidonia oceanica meadows at three locations along the Spanish Mediterranean coast, with two sites located in the Almería region (Agua Amarga and Roquetas) and one at Cabrera Island (Santa Maria). Almería is known for its intense agricultural industry with 30 000 ha of plastic-covered …

Go to article

Compiled Dataset From The National Reservoir Research Program 1989 Dataset, Nicky M. Faucheux, Leandro E. Miranda Jan 2021

Compiled Dataset From The National Reservoir Research Program 1989 Dataset, Nicky M. Faucheux, Leandro E. Miranda

CFR Publications

This dataset was compiled from the National Reservoir Research Program 1989 dataset. The NRRP dataset includes data from rotenone and creel studies at reservoirs throughout the continental US during the 1980s. We compiled the species level biomass data into total biomass for each of five trophic guilds (piscivores, detritivores, herbivores, invertivores, and planktivores). This compiled dataset was used to investigate the Cascading Reservoir Continuum Concept across 16 river basins in a study conducted by the 2020 Management of Impounded Rivers Class.

Go to article

Assessing The Role Of Disturbance In Estuarine Fish Community Dynamics, Dakota Lewis Jan 2021

Assessing The Role Of Disturbance In Estuarine Fish Community Dynamics, Dakota Lewis

Electronic Theses and Dissertations, 2020-2023

Ecological disturbances alter biotic communities and ecosystems. In many coastal zones disturbances are increasing, including algal blooms, storms, hypoxic events, and fish kills. These disturbances are often related, for example blooms releasing toxins or depleting dissolved oxygen, ultimately killing fish. Depending on the intensity, duration, and geographic extent of a disturbance, the fish community can take days to years to recover from disturbances. To explore the relationships among environmental disturbances, sport fish, and forage fish communities, this thesis examined two Florida estuaries with differing disturbance regimes. Using an ensemble modelling approach combining generalized linear models (GLM), Bayesian modelling, and Bayesian …

Go to article

Density Data For Lake Ontario Benthic Invertebrate Assemblages From 1964 To 2018, Lyubov E. Burlakova, Alexander Karatayev, Allison R. Hrycik, Susan Daniel, Knut Mehler, Lars G. Rudstam, James M. Watkins, Ronald Dermott, Jill Sharold, Ashley K. Elgin, Thomas F. Nalepa, Elizabeth K. Hinchey, Stephen J. Lozano Jan 2021

Density Data For Lake Ontario Benthic Invertebrate Assemblages From 1964 To 2018, Lyubov E. Burlakova, Alexander Karatayev, Allison R. Hrycik, Susan Daniel, Knut Mehler, Lars G. Rudstam, James M. Watkins, Ronald Dermott, Jill Sharold, Ashley K. Elgin, Thomas F. Nalepa, Elizabeth K. Hinchey, Stephen J. Lozano

Great Lakes Center Faculty Publications

Benthic invertebrates are important trophic links in aquatic food webs and serve as useful bioindicators of environmental conditions because their responses integrate the effects of both water and sediment qualities. However, long-term data sets for benthic invertebrate assemblages across broad geographic areas are rare and, even if collected, historic data sets are often not readily accessible. This data set provides densities of benthic macroinvertebrates for all taxa collected during lake-wide surveys in Lake Ontario, a Laurentian Great Lake, from 1964 to 2018. This information resulted from surveys funded by the governments of the United States and Canada to investigate the …

Go to article

Beaver Moderated Fire Resistance In The North Cascades And Potential For Climate Change Adaptation, Joseph John Weirich Iii Jan 2021

Beaver Moderated Fire Resistance In The North Cascades And Potential For Climate Change Adaptation, Joseph John Weirich Iii

EWU Masters Thesis Collection

Climate change and fire suppression have altered historic fire regimes, creating conditions for larger, more intense fires. Intense burns can alter watershed hydrology, increasing the potential for harmful channel incision, which impairs riparian ecosystem function by lowering the water table, disconnecting floodplains from aquatic environments. However, wetlands and functioning riparian zones can reduce burn intensity. Beaver, with their unique ability to build dams, can restore incised and degraded streams, store water, and expand wetland environments, potentially decreasing wildfire intensity, fire spread and create fire breaks across the landscape. My objective was to test the hypothesis that beaver impoundments increase landscape …

Go to article

Life History And Microbiome Analysis Of Freshwater Fingernail Clams (Sphaeriidae) Exposed To Trace Metal Pollution, Dechen D. Edwards Jan 2021

Life History And Microbiome Analysis Of Freshwater Fingernail Clams (Sphaeriidae) Exposed To Trace Metal Pollution, Dechen D. Edwards

EWU Masters Thesis Collection

Aquatic habitats impacted by anthropogenic activities such as mining can contain metal mixtures of nonessential and essential trace metals. The consequences of chronic exposure to metal mixtures on the life history of benthic organisms are unclear, as are the potential effects on host-associated microbial communities. I use an energy-budget based methodology to ask whether exposure to metal mixtures influences the life histories of freshwater fingernail clams (Sphaeriidae) and if fingernail clams are selecting a different microbial community if chronically exposed to metal mixtures than if in a site that is not impacted by metal pollution. Fingernail clams are small, cosmopolitan, …

Go to article

Effects Of Beaver Dam Analogs On Stream Ecosystem Function Of Crab Creek, Washington State, Nicholas D. Broderius Jan 2021

Effects Of Beaver Dam Analogs On Stream Ecosystem Function Of Crab Creek, Washington State, Nicholas D. Broderius

EWU Masters Thesis Collection

This study documents the effects of beaver dam analogs (BDAs) on nutrient transport, fish community composition, macroinvertebrate drift, and benthic macroinvertebrate communities of Crab Creek, WA, USA. In 2019, the U.S. Fish and Wildlife Service (USFWS), and Natural Resource Conservation Service (NRCS) placed 25 BDAs in Crab Creek on a section of private land near Harrington, WA. Beaver dam analogs are structures placed in streams to mimic the ecosystem effects of beaver activity and are increasingly used as a stream restoration technique. The primary goals of placing these BDAs in the stream was to impound sediment and create a new …

Go to article

Red Drum And Spotted Seatrout Live-Release Tournament Mortality And Dispersal, T. Reid Nelson, Crystal Hightower, Sean P. Powers Jan 2021

Red Drum And Spotted Seatrout Live-Release Tournament Mortality And Dispersal, T. Reid Nelson, Crystal Hightower, Sean P. Powers

University Faculty and Staff Publications

Although catch-and-release fishing tournaments undoubtedly reduce mortality of target species, postrelease mortality and fish stockpiling at release sites remain common concerns related to these tournaments. The impacts of liverelease tournaments on freshwater species have been widely studied. However, research on estuarine sport fishes is lacking even though catch-and-release tournaments targeting these species are prevalent and popular recreational fisheries exist. Therefore, we estimated the post-weigh-in mortality and dispersal of Red Drum Sciaenops ocellatus and Spotted Seatrout Cynoscion nebulosus released from the 2016–2018 Alabama Deep Sea Fishing Rodeo live-weigh-in categories using acoustic telemetry. To concurrently estimate overall post-weigh-in mortality and dispersal, we …

Go to article

Journal Of Ecology 2021 Global Rainfall-Seagrass Resilience-Swan River, Chanelle L. Webster, Kathryn M. Mcmahon, Paul S. Lavery, Simone Strydom, Marta Sánchez Alarcón, Kieryn L. Kilminster, Katherine Bennet, Sian Mcnamara Jan 2021

Journal Of Ecology 2021 Global Rainfall-Seagrass Resilience-Swan River, Chanelle L. Webster, Kathryn M. Mcmahon, Paul S. Lavery, Simone Strydom, Marta Sánchez Alarcón, Kieryn L. Kilminster, Katherine Bennet, Sian Mcnamara

Research Datasets

The excel file contains: summary of daily maximum precipitation from global rainfall analysis, monthly change in seagrass indicators (biomass, leaf density etc); water quality data including salinity, temperature and light data. There are also .nc files containing precipitation data from 1979-2019.

Go to article

Anthropogenic Litter In Illinois Streams: Monitoring, Distribution, And Relationship To Biological Indicators Of Stream Health, Lauren Wisbrock Jan 2021

Anthropogenic Litter In Illinois Streams: Monitoring, Distribution, And Relationship To Biological Indicators Of Stream Health, Lauren Wisbrock

Master's Theses

Anthropogenic litter (i.e., trash; AL) is increasing in aquatic ecosystems worldwide. AL shows a patchy, uneven distribution in lotic ecosystems due to heterogeneity in its sources, how it moves, and mechanisms of retention. In addition, the diversity of material types, size, and mobility makes developing techniques to measure AL assemblage in rivers a challenge. In rivers, watershed land-use and riparian features likely impact AL abundance and composition, but this impact is not fully understood. Measuring AL can be time consuming and labor intensive, so rapid assessments are needed for ecosystem managers to quantify the level of AL impairment in a …

Go to article

Biolability Of Fresh And Photodegraded Pyrogenic Dissolved Organic Matter From Laboratory-Prepared Chars, K. W. Bostick, A. R. Zimmerman, A. I. Goranov, S. Mitra, P. G. Hatcher, A. S. Wozniak Jan 2021

Biolability Of Fresh And Photodegraded Pyrogenic Dissolved Organic Matter From Laboratory-Prepared Chars, K. W. Bostick, A. R. Zimmerman, A. I. Goranov, S. Mitra, P. G. Hatcher, A. S. Wozniak

Chemistry & Biochemistry Faculty Publications

Pyrogenic dissolved organic matter (pyDOM) is known to be an important biogeochemical constituent of aquatic ecosystems and the carbon cycle. While recent studies have examined how pyDOM production, composition, and photolability varies with parent pyrogenic solid material type, we lack an understanding of potential microbial mineralization and transformation of pyDOM in the biogeosphere. Thus, leachates of oak, charred at 400 °C and 650 °C, as well as their photodegraded counterparts were incubated with a soil‐extracted microbial consortium over 96 days. During the incubation, significantly more carbon was biomineralized from the lower versus higher temperature char leachate (45% vs. 37% lost, …

Go to article

Invasive Bullfrogs Maintain High Levels Of Immune Gene Diversity Despite Elevated Bd Infection Relative To Native Populations, Jacob Lafond Jan 2021

Invasive Bullfrogs Maintain High Levels Of Immune Gene Diversity Despite Elevated Bd Infection Relative To Native Populations, Jacob Lafond

Electronic Theses and Dissertations, 2020-2023

Maintenance of genetic diversity at ecologically-relevant loci may be important for allowing invasive populations to become established despite decreases in genomic diversity due to founder effects. To evaluate this prediction, we compared genetic diversity at an expressed MHC class IIß gene fragment to a 909 bp region of the neutral cytochrome b (cytb) locus from 20 populations of the American bullfrog (Rana catesbeiana) across its North American invasive and native ranges and quantified the presence of Batrachochytrium dendrobatidis (Bd), a pathogen, for which R. catesbeiana is a vector species. We recovered 28 unique MHC alleles and found that invasive populations …

Go to article

Aquatic Macrophyte Communities In Five Sibley County (Minnesota) Lakes And The Factors That Affect Their Distribution, Samuel A. Schmid Jan 2021

Aquatic Macrophyte Communities In Five Sibley County (Minnesota) Lakes And The Factors That Affect Their Distribution, Samuel A. Schmid

All Graduate Theses, Dissertations, and Other Capstone Projects

The purposes of this study are to 1) quantify the shifts in the macrophyte community structure of five lakes in Sibley County, and 2) to assess the relationships between the macrophyte communities and abiotic factors in these five lakes. In both the early and late growing season of 2019, point-intercept surveys were conducted on High Island Lake, Titlow Lake, Schilling Lake, Silver Lake, and Clear Lake. At each point, water depth was recorded, and all macrophytes sampled were identified and recorded as “present.” There was not a late season survey conducted for High Island Lake in 2019 due to a …

Go to article

Evaluation Of Methods For The Restoration Of Native Grasslands On Abandoned Center Pivots In The Sandsage Prairies Of Southwestern Kansas, Alonso Barragan-Martinez Jan 2021

Evaluation Of Methods For The Restoration Of Native Grasslands On Abandoned Center Pivots In The Sandsage Prairies Of Southwestern Kansas, Alonso Barragan-Martinez

Master's Theses or Doctor of Nursing Practice

Throughout southwestern Kansas thousands of acres of native grassland have been converted to cropland for agricultural use, reducing native prairie by over 60% in the sandsage prairie. Due to low precipitation and arid conditions, much of these croplands are irrigated by center pivot irrigation systems fed by the Ogallala Aquifer. These fields are abandoned when the aquifers dry up, resulting in erosion of the unused farmland. Conservation programs such as the Conservation Reserve Enhancement Program (CREP) were established to address this problem but have been unsuccessful in restoring native grasslands in abandoned croplands in southwestern Kansas. We hypothesized that insect …

Go to article

Controls On Autotrophic Respiration, Heterotrophic Respiration, And Decomposition In Northern Forested Rivers, Renn Schipper Jan 2021

Controls On Autotrophic Respiration, Heterotrophic Respiration, And Decomposition In Northern Forested Rivers, Renn Schipper

Dissertations, Master's Theses and Master's Reports

Autotrophic respiration (AR), heterotrophic respiration (HR), and decomposition are important contributors to the carbon cycle in streams. It is important to understand how different environmental factors, such as canopy cover and dissolved organic carbon (DOC), influence these processes. DOC concentrations in northern forested streams are increasing, which may affect light and carbon availability. To examine the effects of DOC and canopy cover on these processes we measured gross primary production, ecosystem respiration and decomposition at 8 sites in 4 streams in the Upper Peninsula of Michigan and used quantile regression to estimate AR and HR. Among sites, AR and decomposition …

Go to article

Regional Impacts Of Invasive Species And Climate Change On Black Ash Wetlands, Joseph Shannon Jan 2021

Regional Impacts Of Invasive Species And Climate Change On Black Ash Wetlands, Joseph Shannon

Dissertations, Master's Theses and Master's Reports

For more than a decade intensive research on the ecohydrology of black ash wetland ecosystems has been performed to understand these systems before they are drastically altered by the invasive species, emerald ash borer (EAB). In that time there has been little research aimed at the scale and persistence of the alterations. Three distinct but related research articles will be presented to demonstrate a method for moderate resolution mapping of black ash across its entire range, understand the relative impacts of EAB and climate change on probable future wetland conditions, and develop an experimental and modeling approach to quantify and …

Go to article

Importance Of Instream Habitat To Recruitment And Community Structure Of Aquatic Invertebrates, Catherine R. Billé Jan 2021

Importance Of Instream Habitat To Recruitment And Community Structure Of Aquatic Invertebrates, Catherine R. Billé

Master’s Theses

This thesis investigates how mechanisms of colonization by aquatic insects, both by ovipositing adults and or larval drift, operate at either micro-, meso-, or macro-scales to influence larval community assemblage in streams. Our study took place in a forested floodplain stream characterized by uniform soft clay and loose detritus substrate. Within this study reach we built three sets of riffles, with each set comprised of three identical riffles built either 15, 10, or 5 m apart. We examined microscale influences on community assemblage by studying recruitment of egg masses to our constructed riffles. We found that riffle habitat additions were …

Go to article

An Assessment Of The Ph Of The Soil In The Tamarack Bog, Clarity Gunn Jan 2021

An Assessment Of The Ph Of The Soil In The Tamarack Bog, Clarity Gunn

Williams Honors College, Honors Research Projects

The purpose of this research project was to assess the pH of the Tamarack bog. The research was conducted once a month, weather permitting, at the Tamarack bog at the Bath Nature Preserve in Akron Ohio. Data collection began on July 31st, 2019 ended October 2020 and was supplemented with pilot data collected in 2018. The pH was taken with a pH probe at specific sampling sites and transects that have been placed by Dr. Mitchell previously for other experiments. It was found that the Tamarack bog presented as a mosaic bog with features of a fen as well. The …

Go to article

An Evaluation Of Antiparasitics Used To Treat The Sea Louse, Caligus Rogercresseyi, In Chilean Salmonid Farming, Dayla Woller Jan 2021

An Evaluation Of Antiparasitics Used To Treat The Sea Louse, Caligus Rogercresseyi, In Chilean Salmonid Farming, Dayla Woller

Scripps Senior Theses

Sea lice pose a global threat to open-net salmonid farming. As Chile is the second largest Atlantic salmon producer, they have a vested interest in mitigating infestations and increasing production. However, this will not be possible without 1) increased research on the underlying mechanisms behind sea lice infestations that will inform 2) governmental regulation of salmon farming. This increase in research and governmental regulation will only be possible through transparency on pesticide practices and sea louse monitoring data from companies operating in Chile. Taking these steps would bring Chile closer to being the largest producer of Atlantic salmon and an …

Go to article

Global Connectivity Of Southern Ocean Ecosystems, Eugene J. Murphy, Nadine M. Johnston, Eileen E. Hofmann, Richard A. Phillips, Jennifer A. Jackson, Andrew J. Constable, Sian F. Henley, Jessica Melbourne-Thomas, Rowan Trebilco, Rachel D. Cavanagh, Geraint A. Tarling, Ryan A. Saunders, David K.A. Barnes, Daniel P. Costa, Stuart P. Corney, Ceridwen I. Fraser, Juan Höfer, Kevin A. Hughes, Chester J. Sands, Sally E. Thorpe, Philip N. Trathan, José C. Xavier Jan 2021

Global Connectivity Of Southern Ocean Ecosystems, Eugene J. Murphy, Nadine M. Johnston, Eileen E. Hofmann, Richard A. Phillips, Jennifer A. Jackson, Andrew J. Constable, Sian F. Henley, Jessica Melbourne-Thomas, Rowan Trebilco, Rachel D. Cavanagh, Geraint A. Tarling, Ryan A. Saunders, David K.A. Barnes, Daniel P. Costa, Stuart P. Corney, Ceridwen I. Fraser, Juan Höfer, Kevin A. Hughes, Chester J. Sands, Sally E. Thorpe, Philip N. Trathan, José C. Xavier

CCPO Publications

Southern Ocean ecosystems are globally important. Processes in the Antarctic atmosphere, cryosphere, and the Southern Ocean directly influence global atmospheric and oceanic systems. Southern Ocean biogeochemistry has also been shown to have global importance. In contrast, ocean ecological processes are often seen as largely separate from the rest of the global system. In this paper, we consider the degree of ecological connectivity at different trophic levels, linking Southern Ocean ecosystems with the global ocean, and their importance not only for the regional ecosystem but also the wider Earth system. We also consider the human system connections, including the role of …

Go to article

An Ecological Comparison Between Resource Subsidies: Pacific Lamprey (Entosphenus Tridentatus) And Pacific Salmon (Oncorhynchus Spp.), Jocelyn Wensloff Jan 2021

An Ecological Comparison Between Resource Subsidies: Pacific Lamprey (Entosphenus Tridentatus) And Pacific Salmon (Oncorhynchus Spp.), Jocelyn Wensloff

All Master's Theses

Historically, oligotrophic Pacific Northwest (PNW) streams received annual returns of spawning anadromous fish that provided resource subsidies in the form of marine-derived nutrients (MDN), thus driving stream food web productivity. To date, many studies in the PNW have focused on Pacific salmon (Oncorhynchus spp.) as a resource subsidy, overlooking other anadromous fish species such as Pacific lamprey (Entosphenus tridentatus). Both Pacific salmon and Pacific lamprey are culturally important to PNW tribes for ceremonial, medicinal, and subsistence purposes, and have been since time immemorial. Unfortunately, both salmon and lamprey populations are in decline. Historically, lamprey have been disregarded …

Go to article

First Prev Next Last