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Effects Of Anthropogenically Induced Groundwater Discharge On Benthic Macroinvertebrate Communities In Urban Streams
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Book Synopsis Effects of Anthropogenically Induced Groundwater Discharge on Benthic Macroinvertebrate Communities in Urban Streams by : Judith Eigenbrod
Download or read book Effects of Anthropogenically Induced Groundwater Discharge on Benthic Macroinvertebrate Communities in Urban Streams written by Judith Eigenbrod and published by . This book was released on 2007 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study examined the influence of large-scale anthropogenically induced groundwater discharge on benthic macroinvertebrate (BMI) communities in three urban streams in south-central Ontario. These streams were monitored at four month intervals over a one year period, upstream and downstream of the discharge. The influence of groundwater discharge was greatest in one stream during the first four sampling months, resulting in colder water that lacked diel temperature variability downstream of the discharge. The effect of this disturbance on the BMI was found to exceed the influence of natural seasonal variability. The composition of the BMI community and physicochemical characteristics of the groundwater were compared to surface water characteristics at different temporal and spatial scales. These results indicated that changes in temperature corresponded to reductions in disturbance-sensitive taxa and species diversity. This study highlights the importance of mitigating temperature differences and maintaining diel temperature variability for BMI communities and stream health.
Book Synopsis Watershed Hydrology by : Vijay P. Singh
Download or read book Watershed Hydrology written by Vijay P. Singh and published by Allied Publishers. This book was released on 2003 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Impact of Habitat and Water Quality on the Benthic Macroinvertebrate Community in a Multi-stressed Urban Stream by :
Download or read book Impact of Habitat and Water Quality on the Benthic Macroinvertebrate Community in a Multi-stressed Urban Stream written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Macroinvertebrates in urban streams in Ohio are potentially compromised by habitat loss, by the annual peak discharge event, and by degraded water quality. The Mill Creek in Southwest Ohio is a significantly channelized river that collects storm water runoff, wastewater treatment plant effluent, permitted dischargers, sanitary sewers, and combined sewers. Channelization areas have had 12-40 years to re-grow. Most of the riparian zone, although narrow, is lined with trees that shade the channel. The result is eutrophication by nutrient loading, some toxic chemical spills, and habitat simplification. This study was designed to show the relative impacts of habitat and water quality on the macroinvertebrate community in a multi-stressed urban stream. Possible limiting factors were quantified and evaluated along the main-stem of the Mill Creek and related to the macroinvertebrates five times over the summer of 2000. The habitat was characterized using the Ohio EPA's QHEI, the estimated peak flow, and pebble counts. Water quality was quantified by the nutrient concentrations found. Both habitat and water parameters were compared to macroinvertebrate density, taxa richness, and the calculated metric, invertebrate community index. Data was collected for base flow in the summer and autumn of 2000-2001. The QHEI and the ICI were linearly related over transects done in four non-consecutive years within a decade. Multiple regression showed several habitat variables correlated to taxa richness. ANOVA identified average species richness was significantly impacted by both water quality and habitat variables. A non-parametric method (detrended canonical correspondence analysis) separated the determinants for invertebrate communities along a nutrient (19.1% of variance) and habitat axis (11.1% of variance).
Book Synopsis Effects of urban development on stream ecosystems in nine metropolitan study areas across the United States by : James F. Coles
Download or read book Effects of urban development on stream ecosystems in nine metropolitan study areas across the United States written by James F. Coles and published by . This book was released on 2012 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Assessing the Effects of Deep Release and Surface Release Reservoirs on Downstream Benthic Macroinvertebrate Communities in the Grand River Watershed by : Elise Elsha DenHeyer
Download or read book Assessing the Effects of Deep Release and Surface Release Reservoirs on Downstream Benthic Macroinvertebrate Communities in the Grand River Watershed written by Elise Elsha DenHeyer and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Benthic Barriers on Macroinvertebrate Communities by : Barry S. Payne
Download or read book Effects of Benthic Barriers on Macroinvertebrate Communities written by Barry S. Payne and published by . This book was released on 1993 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Spatial and Temporal Variability of Stream Benthic Macroinvertebrates by : Leonard Sandin
Download or read book Spatial and Temporal Variability of Stream Benthic Macroinvertebrates written by Leonard Sandin and published by . This book was released on 2000 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Deposited Sediment on Stream Benthic Macroinvertebrate Communities by : Leanna D. Zweig
Download or read book Effects of Deposited Sediment on Stream Benthic Macroinvertebrate Communities written by Leanna D. Zweig and published by . This book was released on 2000 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Relationships Between Headwater Stream Macroinvertebrate Communities and Summer Low-flow Events in a Temperate Rain Forest by :
Download or read book The Relationships Between Headwater Stream Macroinvertebrate Communities and Summer Low-flow Events in a Temperate Rain Forest written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Using a forested headwater stream system as a model, the effects of inter-annual variation in summer discharge regimes on aquatic insect communities were investigated. More specifically, the benthic invertebrate community response to the intensity, minimum discharges, frequency, duration and abruptness of summer low-flow events were examined. We hypothesized that intensification of summer low-flow events, both in duration and magnitude, have some negative impacts on benthic macroinvertebrate communities in riffles. Examples of negative impacts include reduction in their abundance and/or biodiversity. First, the abundance and functional trait data of the benthic macroinvertebrates in the three streams in the Malcolm Knapp Research Forest, British Columbia, Canada, were analyzed with respect to the low-flow events. Second, population models were built to simulate the potential responses of lotic aquatic insect communities to future climate change scenarios that differ in the rate of intensifications in extreme flow events: a low-flow event scenario within the current range versus 10% increase in intensity. The summer low-flow events were found to have a significant relationship with benthic macroinvertebrate communities through three-table ordinations of the empirical data. The community structure was correlated with a major ocean-atmosphere regime shift (Pacific Decadal Oscillation). The intensity and duration of low-flow events explained the observed shift in community structure favouring r-selected traits (e.g. short life cycle, high reproduction rate). The two low-flow severity scenarios showed the significant differential impacts on the aquatic insect community structures when individual populations were modeled according to their traits. Aquatic insects could be separated into three groups according to their sensitivities, measured by extinction rates, toward the two scenarios.
Book Synopsis The Effects of Hydropeaking on Lotic Benthic Macroinvertebrate Assemblages by : Andrew L. Garey
Download or read book The Effects of Hydropeaking on Lotic Benthic Macroinvertebrate Assemblages written by Andrew L. Garey and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The term hydropeaking refers to anthropogenically induced, short-duration, high-magnitude discharge pulses that are generated in lotic systems for electricity production. The practice of hydropeaking produces the largest source of renewable energy worldwide, and its use is projected to increase through the year 2040. The primary objective of this work was to evaluate the effects of hydropeaking on benthic macroinvertebrate assemblages, which are important components of lotic ecosystems. Results of this work show that, across a wide range of impacted systems worldwide, the consistently observed patterns of elevated benthic macroinvertebrate drift in response to hydropeaking pulses are primarily related to the rate at which discharge is increased (i.e., ramping rate) and secondarily to the time between pulses. In addition, it was shown that taxa inhabiting depositional habitat patches (i.e. fine substrates and slow water velocities) were most susceptible to peaking-induced drift, and that these taxa were also those most prevalent in hydropeaking-impacted systems. Collectively, these results suggest that increased pulse ramping rate and the resulting elevated macroinvertebrate drift may be positive selective forces, which benefit populations adapted for life in hydropeaking-impacted lotic ecosystems. These results provide a greater understanding of the factors that are most important for governing the effects of hydropeaking on benthic assemblages.
Book Synopsis Environmental changes induced by stream regulation and their effect on lotic macroinvertebrate communities by : P D. Armitage
Download or read book Environmental changes induced by stream regulation and their effect on lotic macroinvertebrate communities written by P D. Armitage and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scale-Dependent Effects of Spatial and Temporal Variability on Benthic Macroinvertebrate Communities in Hong Kong Streams by : 梁士倫
Download or read book Scale-Dependent Effects of Spatial and Temporal Variability on Benthic Macroinvertebrate Communities in Hong Kong Streams written by 梁士倫 and published by . This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Scale-dependent Effects of Spatial and Temporal Variability on Benthic Macroinvertebrate Communities in Hong Kong Streams" by 梁士倫, Sze-lun, Leung, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. DOI: 10.5353/th_b3124331 Subjects: Freshwater invertebrates - China - Hong Kong Water quality biological assessment - China - Hong Kong Rivers - Environmental aspects - China - Hong Kong
Book Synopsis The Effect of Industrial and Domestic Pollution on Benthic Macroinvertebrate Communities in Two Northern Idaho Rivers by : Nancy Lorraine Savage
Download or read book The Effect of Industrial and Domestic Pollution on Benthic Macroinvertebrate Communities in Two Northern Idaho Rivers written by Nancy Lorraine Savage and published by . This book was released on 1970 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Natural Attenuation of Fuels and Chlorinated Solvents in the Subsurface by : Todd H. Wiedemeier
Download or read book Natural Attenuation of Fuels and Chlorinated Solvents in the Subsurface written by Todd H. Wiedemeier and published by John Wiley & Sons. This book was released on 1999-03-08 with total page 634 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first comprehensive guide to one of today's most innovative approaches to environmental contamination Natural attenuation is gaining increasing attention as a nonintrusive, cost-effective alternative to standard remediation techniques for environmental contamination. This landmark work presents the first in-depth examination of the theory, mechanisms, and application of natural attenuation. Written by four internationally recognized leaders in this approach, the book describes both biotic and abiotic natural attenuation processes, focusing on two of the environmental contaminants most frequently encountered in groundwater--fuels and chlorinated solvents. The authors draw on a wealth of combined experience to detail successful techniques for simulating natural attenuation processes and predicting their effectiveness in the field. They also show how natural attenuation works in the real world, using numerous examples and case studies from a wide range of leading-edge projects nationwide involving fuel hydrocarbons and chlorinated solvents. Finally, they discuss the evaluation and assessment of natural attenuation and explore the design of long-term monitoring programs. An indispensable reference for anyone working in environmental remediation, Natural Attenuation of Fuels and Chlorinated Solvents in the Subsurface is essential reading for scientists and engineers in a range of industries, as well as state and federal environmental regulators, and professors and graduate students in environmental or chemical engineering.
Book Synopsis Effects of Land-use Change on Benthic Macroinvertebrates in the Upper Reaches of the Apies-Pienaar Catchment by : Joseph Alexander Mulders
Download or read book Effects of Land-use Change on Benthic Macroinvertebrates in the Upper Reaches of the Apies-Pienaar Catchment written by Joseph Alexander Mulders and published by . This book was released on 2015 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: Urbanisation of catchment areas is a major cause of freshwater ecosystem degradation worldwide. As catchments become more developed and river ecosystems become increasingly engulfed in various land use activities, there is a growing need to understand these impacts on freshwater ecosystems. Benthic macroinvertebrates are extensively used as indicators of ecosystem health and have been an instrumental tool in ecosystem monitoring and management. The effects of changing land use on macroinvertebrates at a fine scale however, have not been extensively investigated. Therefore an investigation was conducted to compare chemical, physical and biological surface water quality parameters and aquatic macroinvertebrate community composition along the first 8 km of the Hartbeesspruit, which contains multiple land use types, in the upper Apies-Pienaar catchment in Gauteng, South Africa. Five sampling sites corresponding to changes in land use were sampled four times at six-week intervals from September 2013 to February 2014. Influential variables that were recorded included in-stream habitat, riparian cover, flow regime and surface water quality parameters. Physical surface water parameters that were tested in situ included pH, salinity, total dissolved solutes, temperature, clarity and conductivity. Ex situ surface water parameters that were tested included physical parameters (alkalinity and turbidity), chemical parameters (major ions, metal ions and nutrients), and biological parameters (bacteria, coliforms and Escherichia coli). Macroinvertebrates were sampled using Hester-Dendy artificial samplers, which, following a 6 week exposure period, were sampled three times from November 2013 to February 2014. Macroinvertebrates were identified to family level and counted. Macroinvertebrate community composition across sites was assessed through macroinvertebrate abundance, family richness, SASS score, ASPT, Shannon-Wiener index, Pielou s evenness, non-metric multidimensional scaling and Indval analyses. Nineteen families were collected, of which only three made up 80% of macroinvertebrates sampled. These families were Hirudinea, Chironomidae and Oligochaeta. Indices of macroinvertebrate community composition indicated a general increase in value from upstream to downstream which showed similar comparative variation between sites to physical water quality parameters (except temperature and clarity), major ions (except arsenic), the metal ion magnesium and nutrient sulphate. Surface water parameters showed patterns indicative of effects due to evaporation, dilution and connectivity of water flow along the stream due to the presence of dams and wetlands. Temperature was an important influence on macroinvertebrate abundance and family richness at a temporal scale. On a spatial scale the most influential parameters on macroinvertebrate composition were seen to be depth, turbidity and conductivity, and temperature to a lesser extent. The land use types that showed the greatest association with various assemblages were the urban, recreational and least transformed wetland land uses. Although major influential factors, this pattern was not seen to be strictly due to the input of contaminants arising from associated activities, nor the variation in physical characteristics, but rather the discontinuity in flow regime. It was concluded that at a fine scale, the strongest factors that influenced macroinvertebrate community composition along the Hartbeesspruit, was not land use type but rather the hydrological pathways of connectivity and stream flow that exist within the system. The hydrological pathways influenced values and concentrations of chemical and physical surface water parameters which in turn further influenced macroinvertebrate assemblages present.
Book Synopsis The Effects of Urbanization on the Health of Fish and Benthic Macroinvertebrate Communities in the Upper Cahaba River Watershed by : Kevin J. Morse
Download or read book The Effects of Urbanization on the Health of Fish and Benthic Macroinvertebrate Communities in the Upper Cahaba River Watershed written by Kevin J. Morse and published by . This book was released on 2005 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Characterization of Microbial and Benthic Macroinvertebrate Communities in Streams Affected by Contaminated Mine Drainage in Central Pennsylvania by : Kimberly Dawn Royal
Download or read book Characterization of Microbial and Benthic Macroinvertebrate Communities in Streams Affected by Contaminated Mine Drainage in Central Pennsylvania written by Kimberly Dawn Royal and published by . This book was released on 2001 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
