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Water quality

Ecology and Evolutionary Biology

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Full-Text Articles in Physical Sciences and Mathematics

Towards Sociobiogeochemistry: Critical Perspectives On Anthropogenic Alterations To Soil Nitrogen Chemistry Via U.S. Urban And Suburban Development, Christopher D. Ryan Feb 2024

Towards Sociobiogeochemistry: Critical Perspectives On Anthropogenic Alterations To Soil Nitrogen Chemistry Via U.S. Urban And Suburban Development, Christopher D. Ryan

Dissertations, Theses, and Capstone Projects

The ecological impacts of changes to land use are relevant to concerns about climate change, eutrophication of waterbodies, and reductions in biodiversity. As a foundational component of ecosystem functioning, changes to soil biogeochemistry have significant effects on overall ecosystem health. With cities continuing to grow and develop in extent, the impacts of urbanization and suburbanization on soils are of particular concern. Despite a wide range of natural climatic and geologic conditions, several factors have driven similar patterns of land transformation and management across the United States. In particular, federal initiatives including the Home Owners Loan Corporation, the Federal Housing Administration, …

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How Akron Affects The Water Quality Of The Cuyahoga River, Allyson Darst Jan 2023

How Akron Affects The Water Quality Of The Cuyahoga River, Allyson Darst

Williams Honors College, Honors Research Projects

The purpose of this study was to analyze whether the city of Akron had negative effects on the Cuyahoga river, and determine if the Cuyahoga River was naturally able to remediate these effects downstream. The pollutants measured in this study include hardness, bromine, residual chlorine, iron, copper, lead, nitrate, nitrite, ammonium chloride, total chlorine, fluoride, carbonate, pH, total alkalinity and cyanuric acid. This study was done using water testing strips (JNW Direct) to test the water at four different locations along the Cuyahoga River downstream (North) of Akron. This study found that the city of Akron does have a negative …

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The Importance Of Winter Dinoflagellate Blooms In Chesapeake Bay— A Missing Link In Bay Productivity, Nicole C. Millette, Sophie Clayton, Margaret R. Mulholland, Leah Gibala-Smith, Michael Lane Jan 2023

The Importance Of Winter Dinoflagellate Blooms In Chesapeake Bay— A Missing Link In Bay Productivity, Nicole C. Millette, Sophie Clayton, Margaret R. Mulholland, Leah Gibala-Smith, Michael Lane

OES Faculty Publications

It is widely assumed that phytoplankton abundance and productivity decline during temperate winters because of low irradiance and temperatures. However, winter phytoplankton blooms commonly occur in temperate estuaries, but they are often undocumented because of reduced water quality monitoring in winter. The small body of in situ work that has been done on winter blooms suggests they can be of enormous consequence to ecosystems. However, because monitoring is often reduced or stopped altogether during winter, it is unclear how widespread these blooms are or how long they can last. We analyzed an over 30-year record of monthly phytoplankton monitoring samples …

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Local-Scale Impacts Of Water Hyacinth On Water Quality In A Hypereutrophic Lake, J. R. Corman, A. Z. Roegner, Z. Ogari, T. R. Miller, C. M. Aura Jan 2023

Local-Scale Impacts Of Water Hyacinth On Water Quality In A Hypereutrophic Lake, J. R. Corman, A. Z. Roegner, Z. Ogari, T. R. Miller, C. M. Aura

School of Natural Resources: Documents and Reviews

No abstract provided.

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Benthic Community Dynamics And Stony Coral Demographics In Florida In Relation To Acute Disturbances And Chronic Pressures, Nicholas P. Jones Aug 2022

Benthic Community Dynamics And Stony Coral Demographics In Florida In Relation To Acute Disturbances And Chronic Pressures, Nicholas P. Jones

All HCAS Student Capstones, Theses, and Dissertations

The persistence of coral reef communities is threatened by a suite of pressures operating at varying spatial and temporal scales. In general, acute disturbances (short term stochastic events such as marine heatwaves or hurricanes) and chronic pressures, such as ocean warming, have caused the most significant changes to stony coral assemblages (order Scleractinia) and continue to impair recovery potential. Additionally, many coral reefs are subject to local chronic anthropogenic pressures resulting in poor water quality or sedimentation, which further impact stony corals and shape benthic community structure, particularly near urbanized coastlines. For the viability of communities on coral reefs, a …

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Wild Pig Removal Reduces Pathogenic Bacteria In Low-Order Streams, Sara A. Bolds, B. Graeme Lockaby, Latif Kalin, Stephen S. Ditchkoff, Mark D. Smith, Kurt Vercauteren Jan 2022

Wild Pig Removal Reduces Pathogenic Bacteria In Low-Order Streams, Sara A. Bolds, B. Graeme Lockaby, Latif Kalin, Stephen S. Ditchkoff, Mark D. Smith, Kurt Vercauteren

USDA Wildlife Services: Staff Publications

Invasive wild pig populations have undergone enormous increases in the United States and particularly across the southern U.S. in recent years. High fecundity rates and abilities to adapt quickly to varied habitats have enabled pig populations to become entrenched and difficult to eliminate. The pigs cause many negative impacts on ecosystems including degradation of water quality through infusion of fecal contamination and other non-point source pollutants. Our goal was to determine the effects of pig removal on water quality in streams that were known to be significantly polluted by pig activity Bolds (J Environ Qual 50: 441–453, 2021). We compared …

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Dammed Water Quality—Longitudinal Stream Responses Below Beaver Ponds In The Umpqua River Basin, Oregon, John R. Stevenson, Jason B. Dunham, Steven M. Wondzell, Jimmy Taylor Jan 2022

Dammed Water Quality—Longitudinal Stream Responses Below Beaver Ponds In The Umpqua River Basin, Oregon, John R. Stevenson, Jason B. Dunham, Steven M. Wondzell, Jimmy Taylor

USDA Wildlife Services: Staff Publications

Beaver-related restoration (BRR) has gained popularity as a means of improving stream ecosystems, but the effects are not fully understood. Studies of dissolved oxygen (DO) and water temperature, key water quality metrics for salmonids, have demonstrated improved conditions in some cases, but warming and decreased DO have been more commonly reported in meta-analyses. These results point to the contingencies that can influence outcomes from BRR. We examined water quality related to beaver ponds in a diverse coastal watershed (Umpqua River Basin, OR, USA). We monitored water temperature 0–400m above and below beaver ponds and at pond surfaces and bottoms across …

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Mussel Musings On The Powell River, Aggy Vanderpool Jan 2021

Mussel Musings On The Powell River, Aggy Vanderpool

Cumberland Mountain Naturalist

No abstract provided.

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Water Quality Assessment In The Occurrence Of Acanthaster Spp. (Crown-Of-Thorns Starfish, Cots) On Coral Reefs In Menjangan Island, Bali, Indonesia, Novia Arinda Pradisty, Eghbert Elvan Ampou, Rizki Hanintyo Sep 2020

Water Quality Assessment In The Occurrence Of Acanthaster Spp. (Crown-Of-Thorns Starfish, Cots) On Coral Reefs In Menjangan Island, Bali, Indonesia, Novia Arinda Pradisty, Eghbert Elvan Ampou, Rizki Hanintyo

Makara Journal of Science

Aquatic stressors are known to cause biological impairment that can result in biodiversity loss in several Marine Protected Areas (MPA), including in Menjangan Island, West Bali National Park. The objectives of this study were to correlate the changes in water quality parameters with the biological effect of Crown-of-Thorns starfish (CoTS) population dynamics and to assess the most applicable parameters for continuous environmental monitoring. Field observations and surveys were conducted three times in 2017, during the wet season, dry season and season transition, in order to assess the effect of seasonal variability. Redundancy Analysis (RDA) was performed to determine the relationship …

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Physical And Biological Factors Controlling The Fate Of Nitrate In A Louisiana Coastal Deltaic Floodplain, Alexandra Christensen Apr 2020

Physical And Biological Factors Controlling The Fate Of Nitrate In A Louisiana Coastal Deltaic Floodplain, Alexandra Christensen

LSU Doctoral Dissertations

The Mississippi River Delta is threatened by a growing pressure to support large human populations in the United States both with food production, navigation systems, and urban development in the Mississippi River Basin. Nitrate-nitrogen load in the Mississippi River, up to 100 Tg N yr-1 from agricultural and urban runoff, leads to phytoplankton blooms and hypoxia across the Louisiana continental shelf, creating dead zones of low dissolved oxygen threatening a significant commercial fishery. Along the coast and river corridors, floodplain ecosystems have the capacity to retain and remove nitrate. This dissertation explores the role of productive, actively growing coastal …

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Evaluation Of The Relationship Between Land Use And Water Quality In Kittitas County, Wa, Lindsay Schulz Jan 2020

Evaluation Of The Relationship Between Land Use And Water Quality In Kittitas County, Wa, Lindsay Schulz

All Master's Theses

Water in Kittitas County is extremely valuable since it supports farming, recreation, and cultural activities, as well as environmental processes and a diversity of biological life while providing many ecosystem services. However, land conversions required by agricultural and urban land uses can negatively impact water quality and the biological function of the stream. I studied how forested, agricultural, and urban land use affect six streams. Fourteen sites were sampled, once each in July, August, and September 2019. Land use was calculated as a percentage of forested, agricultural, and urban land use within a 100-m buffer of the stream, upstream of …

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California Stream Condition Index (Csci) Score Analysis Of Streams Sampled From 1998 To 2017 In The San Francisco Bay Region, Jenna Rais Dec 2019

California Stream Condition Index (Csci) Score Analysis Of Streams Sampled From 1998 To 2017 In The San Francisco Bay Region, Jenna Rais

Master's Projects and Capstones

Human impacts to California’s streams have altered the state’s riparian and hydrological landscape. This is a critical issue with regard to natural resources, including ecosystem services such as water availability and water quality. Regulations have a limited amount of impact on the improvement of this landscape and can also become complicated by politics. Scientific advances have developed ways to quantify and describe the quality of streams, this includes the development of the California Stream Condition Index (CSCI) which is based on benthic macroinvertebrate (BMI) population numbers and functions. This index allows scientists to not only score the quality of a …

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Ecological And Economic Implications Of Increased Storm Frequency And Severity For Boreal Lakes, Kathryn Warner May 2019

Ecological And Economic Implications Of Increased Storm Frequency And Severity For Boreal Lakes, Kathryn Warner

Electronic Theses and Dissertations

In boreal regions, increased precipitation events have been linked to increased concentrations of dissolved organic carbon (DOC), however less is known about the extent and implications of these events on lakes. We assessed the effects of precipitation events on six drinking water lakes in Maine, USA to better understand how DOC concentration and quality change in response to precipitation events. Our results revealed three types of responses: (1) an initial spike in DOC concentrations and quality metrics; (2) a sustained increase in DOC concentrations and quality metrics and; (3) no change during all sampling periods. Lake residence time was a …

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Past, Present, And Future Water Quality In Lake Union/Ship Canal, Elliott Bay, And The Duwamish Estuary And The Benefits Of Combined Sewer Overflow Control And Other Projects, Jim Simmonds Apr 2018

Past, Present, And Future Water Quality In Lake Union/Ship Canal, Elliott Bay, And The Duwamish Estuary And The Benefits Of Combined Sewer Overflow Control And Other Projects, Jim Simmonds

Salish Sea Ecosystem Conference

To help protect regional water quality, in 2012 King County initiated a study to review the impacts of combined sewer overflows (CSOs) and other sources of pollution to inform the region of the benefits of CSO control. King County’s Water Quality Assessment and Monitoring Study (Study) explored water quality in Lake Union/Ship Canal, Elliott Bay, and the Duwamish Estuary, where the County is planning projects to reduce the frequency of CSOs to an average of one untreated overflow per site per year over a 20-year moving average. Reducing CSO frequency to this degree is known as CSO “control” and is …

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Nitrogen Inventory In The Nooksack-Fraser Transboundary Watershed, Jiajia Lin, Jana Compton, Jill Baron, Chris Clark, Donna Schwede, Shabtai Bittman, David Hooper, Barb Carey, Peter Homann, Hanna Winter, Peter Kiffney, Nichole Embertson, Heather Mackay, Robert Black, Gary Bahr Apr 2018

Nitrogen Inventory In The Nooksack-Fraser Transboundary Watershed, Jiajia Lin, Jana Compton, Jill Baron, Chris Clark, Donna Schwede, Shabtai Bittman, David Hooper, Barb Carey, Peter Homann, Hanna Winter, Peter Kiffney, Nichole Embertson, Heather Mackay, Robert Black, Gary Bahr

Salish Sea Ecosystem Conference

The Nooksack-Fraser transboundary area (2639 km2) is home to communities with a strong base in farming, fisheries and outdoor recreation. Water quality issues impact parts of this area, where sewage effluent and animal waste are potential sources of both fecal coliform bacteria (FCB) and nitrogen (N) in the environment. Excessive nitrogen loading can lead to eutrophication in coastal areas, and nitrate contamination of groundwater. The Nooksack-Fraser Transboundary Nitrogen (NFT-N) project was developed to determine the sources and fates of N in the watershed using data on energy use, transportation, fertilization, wastewater treatment plants, livestock operations, wildlife and more. This project …

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Impact Of Septic Systems In Drayton Harbor Water Quality, Jennifer Hayden Apr 2018

Impact Of Septic Systems In Drayton Harbor Water Quality, Jennifer Hayden

Salish Sea Ecosystem Conference

Septic systems are personal wastewater treatment systems for rural properties. Over 3,000 septic systems exist in the Drayton Harbor watershed. Septic systems that are not maintained properly can create problems for homeowners, negatively impact water quality, and pose a public health threat. Whatcom County Health Department (WCHD) began implementing a septic system operation and maintenance (O&M) program in 2008 in the Drayton Harbor watershed when most of Drayton Harbor was classified as Prohibited for shellfish harvesting due to elevated fecal coliform bacteria levels. The local health officer’s designation of Drayton Harbor as a Marine Recovery Area in 2008 allowed WCHD …

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Nooksack Tribe Collaborative Teaming To Address Shellfish Harvest Closures In Drayton Harbor, Oliver Grah, Jezra Beaulieu Apr 2018

Nooksack Tribe Collaborative Teaming To Address Shellfish Harvest Closures In Drayton Harbor, Oliver Grah, Jezra Beaulieu

Salish Sea Ecosystem Conference

The Nooksack Indian Tribe reservation is located at the foot of the North Cascades Mountains, near Deming, WA, and approximately 13 miles east of Bellingham and the Salish Sea. Drayton Harbor is part of the Salish Sea and is the Tribe’s traditional shellfish gathering area. Drayton Harbor is also an important shellfish gathering and production area for commercial and recreational uses. The Harbor has been under a TMDL for fecal coliform bacteria for more than 10 years for non-compliance with state water quality standards. Although re-opened to year-round harvest in late 2016, Drayton Harbor’s shellfish have been subjected to various …

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Engaging The Community In Drayton Harbor's Comeback Story, Betsy Peabody Apr 2018

Engaging The Community In Drayton Harbor's Comeback Story, Betsy Peabody

Salish Sea Ecosystem Conference

During the 1980 and 1990s, bacterial contamination in Drayton Harbor resulted in bay-wide closures of tribal, commercial and recreational shellfish harvest. In 2001, Puget Sound Restoration Fund partnered with local shellfish farmer extraordinaire Geoff Menzies to launch the Drayton Harbor Community Oyster Farm. With Geoff at the helm, the community farm invigorated a 20+ year community-wide effort to restore 810 acres of growing area to Approved harvest status in 2016. At the outset, seeding oysters in a bay prohibited to harvest, and involving volunteers in oyster farming, was a gamble. But the vision was that if people became immersed in …

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Raising The Standards For Water Quality Objectives In Burrard Inlet: Interaction Between Public, Ecological And Cultural Values Through Indigenous-Provincial Collaboration, Anuradha Rao, Bridget Doyle, John Konovsky, Patrick Lilley Apr 2018

Raising The Standards For Water Quality Objectives In Burrard Inlet: Interaction Between Public, Ecological And Cultural Values Through Indigenous-Provincial Collaboration, Anuradha Rao, Bridget Doyle, John Konovsky, Patrick Lilley

Salish Sea Ecosystem Conference

Water Quality Objectives (WQOs) in British Columbia set limits within which various parameters should remain to enable sensitive uses of water bodies. The current WQOs for Burrard Inlet are more than 25 years old and do not reflect current science, all pollutants of concern or a complete understanding of uses and values, for example uses of particular importance to First Nations. As part of its work to implement the Burrard Inlet Action Plan, Tsleil-Waututh Nation is leading an initiative with the Province of BC to update the Burrard Inlet WQOs. One goal in doing so is to ensure that ecological …

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Changes To Washington State's Recreational Use Criteria And Implications For Surface Waters, Bryson Finch, Chad Brown Apr 2018

Changes To Washington State's Recreational Use Criteria And Implications For Surface Waters, Bryson Finch, Chad Brown

Salish Sea Ecosystem Conference

Washington State’s surface water quality standards set limits on pollution in lakes, rivers, and marine waters in order to protect beneficial uses, such as swimming and fishing. Washington State Department of Ecology has recently announced a rulemaking to update recreational use criteria (RUC). Recreational use criteria are intended to protect human health while enjoying water-related activities. Recreational use criteria are based on bacterial indicators rather than direct measurements of pathogens. Washington’s current bacterial indicator, fecal coliform, was removed from the Environmental Protection Agency’s (EPA) recommendations in 1986. The EPA is now requiring states update their RUC to the new bacterial …

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How Did Large Scale Climate Anomalies Impact 2015 Phytoplankton Blooms In Puget Sound?, Juhi Lafuente, Christopher Krembs, S. L. Albertson, Allison Brownlee, Julia Bos, Laura Hermanson, Mya Keyzers Apr 2018

How Did Large Scale Climate Anomalies Impact 2015 Phytoplankton Blooms In Puget Sound?, Juhi Lafuente, Christopher Krembs, S. L. Albertson, Allison Brownlee, Julia Bos, Laura Hermanson, Mya Keyzers

Salish Sea Ecosystem Conference

The Washington State Department of Ecology has been routinely monitoring marine water quality throughout the Puget Sound since 1973. An established historic baseline from 1999 to 2008 allows us to examine how water quality varies year to year as a result of both natural and human influences. The recent large scale climate anomaly, the Blob, impacted this region when a mass of warm water entered Puget Sound in fall 2014. In conjunction with higher than normal air temperatures, patterns of estuarine circulation and stratification were regionally altered in Puget Sound. Changes to these physical patterns affect ecosystem functions starting at …

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Long-Term Water Quality Trend Analysis In The Lone Tree Creek Watershed And Surrounding Marine Waters, Shannon Buckham, Nicole Casper Apr 2018

Long-Term Water Quality Trend Analysis In The Lone Tree Creek Watershed And Surrounding Marine Waters, Shannon Buckham, Nicole Casper

Salish Sea Ecosystem Conference

The Lone Tree Creek watershed is located on the Reservation of the Swinomish Indian Tribal Community (SITC) and is an important area both ecologically and culturally. Lone Tree Creek and the surrounding Skagit Bay nearshore environment provide important salmon and shellfish habitats, as well as recreation areas, and therefore have been the focus for ongoing research since 1997. Water quality parameters in the creek, lagoon, and two bay sites have been monitored since the late 1990s and early 2000s, and an additional pocket estuary site was added to monitoring efforts in 2007. This study used Mann-Kendall analysis to determine how …

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Social And Economic Impacts Of A 2017 Oyster-Transmitted Norovirus Outbreak In Hammersley Inlet, Puget Sound, Marisa Nixon Apr 2018

Social And Economic Impacts Of A 2017 Oyster-Transmitted Norovirus Outbreak In Hammersley Inlet, Puget Sound, Marisa Nixon

Salish Sea Ecosystem Conference

Hammersley Inlet in Washington State is a highly productive growing area for oysters, with at least 34 different commercial shellfish growers operating in its tidelands. The oysters in Hammersley Inlet provide an important source of income, employment and recreation for surrounding Mason County. In early spring 2017, Hammersley Inlet was implicated in a shellfish-transmitted norovirus outbreak that resulted in growing area closures and recalls, significantly impacting small, local shellfish farmers. From its initial illness investigation, Washington State Department of Health (DOH) was unable to identify a point pollution source responsible for the outbreak, and some shellfish producing parcels remained closed …

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Water Quality Effects Of Fish Habitat Restoration At Lone Tree Creek, Nicole Casper, Shannon M. Buckham Apr 2018

Water Quality Effects Of Fish Habitat Restoration At Lone Tree Creek, Nicole Casper, Shannon M. Buckham

Salish Sea Ecosystem Conference

Lone Tree Creek is located on the Swinomish Indian Tribal Community (SITC) Reservation. The creek’s watershed includes pocket estuary habitat, discharges over shellfish beds, an important resource for the Swinomish People, and flows into northern Skagit Bay. In 2006, extensive creek restoration replaced culverts, restored tidal influence to the pocket estuary, and planted riparian buffers, successfully restoring rearing habitat for juvenile Chinook salmon. Beyond fish habitat benefits, SITC wanted to assess long-term restoration effects on creek water quality and its associated pocket estuary, lagoon and bay. Water quality monitoring for conventional parameters and bacteria spanned 1997-2016 (10 years pre- and …

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Land Use, Stream Stability, And Benthic Invertebrates In A Dry Forest Watershed Of Western Costa Rica, Jacqueline Ann Demko Mar 2017

Land Use, Stream Stability, And Benthic Invertebrates In A Dry Forest Watershed Of Western Costa Rica, Jacqueline Ann Demko

USF Tampa Graduate Theses and Dissertations

There is a paucity of data on dry forests, the most threatened biome in the tropics. The Nandamojo is a tropical dry forest watershed in Western Costa Rica that has been impacted by varying degrees of human induced modifications. This research was conducted to examine the influence of land use and channel characteristics on invertebrate communities within a sub basin of the Nandamojo watershed. This study addressed three hypotheses: (1) sites with low tree cover and small riparian buffer zones will have high erosion, (2) macroinvertebrate abundance will be lower at sites with low channel stability values, and (3) benthic …

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Exploring, Exploiting And Evolving Diversity Of Aquatic Ecosystem Models: A Community Perspective, Annette B.G. Janssen, George B. Arhonditsis, Arthur Beusen, Karsten Bolding, Louise Bruce, Jorn Bruggeman, Raoul-Marie Couture, Andrea S. Downing, J. Alex Elliott, Marieke A. Frassl, Gideon Gal, Daan J. Gerla, Matthew R. Hipsey, Fenjuan Hu, Stephen C. Ives, Jan H. Janse, Erik Jeppesen, Klaus D. Jöhnk, David Kneis, Xiangzhen Kong, Jan J. Kuiper, Moritz K. Lehmann, Carsten Lemmen, Deniz Özkundakci, Thomas Petzoldt, Karsten Rinke, Barbara J. Robson, René Sachse, Sebastiaan A. Schep, Martin Schmid, Huub Scholten, Sven Teurlincx, Dennis Trolle, Tineke A. Troost, Anne A. Van Dam, Luuk P.A. Van Gerven, Mariska Weijerman, Scott A. Wells, Wolf M. Mooij Dec 2015

Exploring, Exploiting And Evolving Diversity Of Aquatic Ecosystem Models: A Community Perspective, Annette B.G. Janssen, George B. Arhonditsis, Arthur Beusen, Karsten Bolding, Louise Bruce, Jorn Bruggeman, Raoul-Marie Couture, Andrea S. Downing, J. Alex Elliott, Marieke A. Frassl, Gideon Gal, Daan J. Gerla, Matthew R. Hipsey, Fenjuan Hu, Stephen C. Ives, Jan H. Janse, Erik Jeppesen, Klaus D. Jöhnk, David Kneis, Xiangzhen Kong, Jan J. Kuiper, Moritz K. Lehmann, Carsten Lemmen, Deniz Özkundakci, Thomas Petzoldt, Karsten Rinke, Barbara J. Robson, René Sachse, Sebastiaan A. Schep, Martin Schmid, Huub Scholten, Sven Teurlincx, Dennis Trolle, Tineke A. Troost, Anne A. Van Dam, Luuk P.A. Van Gerven, Mariska Weijerman, Scott A. Wells, Wolf M. Mooij

Civil and Environmental Engineering Faculty Publications and Presentations

Here, we present a community perspective on how to explore, exploit and evolve the diversity in aquatic ecosystem models. These models play an important role in understanding the functioning of aquatic ecosystems, filling in observation gaps and developing effective strategies for water quality management. In this spirit, numerous models have been developed since the 1970s. We set off to explore model diversity by making an inventory among 42 aquatic ecosystem modellers, by categorizing the resulting set of models and by analysing them for diversity. We then focus on how to exploit model diversity by comparing and combining different aspects of …

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River Health In Puyo, Ecuador The Use Of Macroinvertebrates As Bioindicators Of Water Quality And Alternatives To Chlorine For Whitening Clothes In The Puyo River Watershed, Allison Rowe Dec 2014

River Health In Puyo, Ecuador The Use Of Macroinvertebrates As Bioindicators Of Water Quality And Alternatives To Chlorine For Whitening Clothes In The Puyo River Watershed, Allison Rowe

Independent Study Project (ISP) Collection

Fresh water is an important resource in Puyo, Ecuador, a city named after the Kichwa word for ‘cloudy’ in reference to its overcast weather. However, the Puyo River watershed is the most contaminated in all of Pastaza Province. The objective of this investigation was first to evaluate the health of the Puyo River using macroinvertebrate analyses and measurements of chlorine concentrations, temperature, pH, turbidity, velocity, and flow rate. The second objective was to learn about practices used to whiten clothes in Puyo and perceptions of water quality in order to understand the magnitude of bleach pollution and the population’s awareness …

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Qualitative And Comparative Analysis Of Stormwater Management In The Tan Brook Watershed, Natalia Von Hausen, Robert F. Smith Jan 2014

Qualitative And Comparative Analysis Of Stormwater Management In The Tan Brook Watershed, Natalia Von Hausen, Robert F. Smith

Research

The Tan Brook Watershed is both a daylighted and diverted underground stream that runs through the Town Center of Amherst and the campus of UMass Amherst. Various stormwater management practices have been used to infiltrate stormwater runoff from streets, lots, buildings and/or vehicles. These systems are custom-designed relative to the surrounding permeability of the soil, vegetation and geographical topography. Some systems have higher success rates than others.

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Urban Stream Syndrome In A Small Town: A Comparative Study Of Sager And Flint Creeks, T. S. Wakefield Jan 2014

Urban Stream Syndrome In A Small Town: A Comparative Study Of Sager And Flint Creeks, T. S. Wakefield

Journal of the Arkansas Academy of Science

Utilizing rapid bioassessment procedures and aquatic physiochemical techniques, a three-year investigation of Sager and Flint creeks was completed. Bioassessment indices and physiochemical parameters of the 2 streams were compared and the effects of urbanization on both watersheds were assessed. Correlating data concerning land usage in both watersheds and alterations of both streams' geomorphology were also utilized to conclude that Sager Creek shows a higher degree of urban stream syndrome than Flint Creek.

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Understanding Basin Specific Life History Characteristics Of Lake Mead Quagga Mussels (Dreissena Bugensis) And A Potential Treatment Using Uv Radiation In Laboratory Studies, Melissa Thaw Aug 2013

Understanding Basin Specific Life History Characteristics Of Lake Mead Quagga Mussels (Dreissena Bugensis) And A Potential Treatment Using Uv Radiation In Laboratory Studies, Melissa Thaw

UNLV Theses, Dissertations, Professional Papers, and Capstones

The quagga mussel (Dreissena bugensis) is an aquatic invasive species that is spreading throughout Lake Mead and other western waterways. Unlike their native waters in Eurasia, Lake Mead exhibits year round warm temperatures, high calcium levels and a lack of natural predators, all of which are very favorable conditions for their growth and spread. Dreissena bugensis reproduce and colonize hard surfaces rapidly, where they filter large amounts of water. They disrupt the aquatic food chain and interfere with infrastructure that is exposed to lake water. There is an urgent need to understand Dreissena bugensis life history characteristics within this new …

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