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:
Download or read book The Effects of a Deep storage Reservoir on the Benthic Macroinvertebrate Community of the Guadalupe River Texas written by David Harbet Kent and published by . This book was released on 1971 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Impact of Impoundment on Macro Invertebrate Communities at Koga Dam written by Abile Teshita and published by LAP Lambert Academic Publishing. This book was released on 2012 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: Benthic invertebrates are major elements to the functioning of freshwater ecosystems, representing a link between detritus and grazing food chains. These organisms have long been used to evaluate the upstream and downstream alterations induced by reservoir construction. While previous monitoring assessments have largely been focused on using physical and chemical indicators, the potential of biological indicators in biomonitoring has been recognized. Hence, it is of great importance to evaluate the impact of river impoundments particularly on water bodies using benthic macro invertebrates as indicators. This study examined downstream effects of impoundments using macro invertebrate monitoring techniques. Therefore, this manuscript provides you basic information about dam-related benthic macro invertebrate communities and enables you evaluate potential effects of dams on benthic resources.
Download or read book A Multimetric Analysis of Benthic Macroinvertebrates Present Downstream of a Small Run of the River Dam in Upstate New York written by Olive Streeter Chen and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Though environmental managers are increasingly turning to dam removal and alteration to mitigate the economic and environmental costs associated with their maintenance and operation, little is known about the potential environmental impacts of these management decisions as data is often not collected prior to and following implementation of changes. A biological assessment of a reach downstream of a prospective micro-hydroelectric project site was conducted in order to generate baseline data for the development of an adaptive management plan to assess the effects of small-scale hydro power projects on stream conditions. Biotic integrity of the reach downstream of the Annandale Dam (Annandale-On-Hudson, NY) and three other distinct riparian habitats along the Saw Kill were evaluated using six family-level metric indices, non-multidimensional scaling (NMDS) and indicator family analysis. Results indicated that the riparian habitats of the Saw Kill are characterized by little to no biological degradation. Multimetric index scores of the Annandale Dam were comparable to those of other good quality riparian habitats along the Saw Kill, suggesting that the presence of the dam does not substantially impair the water quality of downstream areas. Future biological assessments should focus on accounting for the effect of seasonal variation on macroinvertebrate community composition.
Download or read book Determining the Association Between the Structure of Stream Benthic Macroinvertebrate Communities and Agricultural Best Management Practices written by Roger Holmes (M.Sc.) and published by . This book was released on 2014 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: Farmers have been encouraged to adopt more sustainable farming practices (BMPs) that mitigate adverse agricultural effects on the natural environment. However, the ability of BMPs to protect or restore riverine systems continues to be questioned due to limited evidence directly linking BMP use with improved ecological conditions. The exclusion of hydrological pathways in previous field studies may explain why a direct link has not yet been established. The goal of this study was to assess the association between benthic macroinvertebrate community structure and the number and location of agricultural BMPs. Macroinvertebrates and water chemistry were sampled in 30 headwater catchments in the Grand River Watershed. Catchments exhibited gradients of BMP use and location as measured by the degree of hydrologic connectedness. Stepwise ordination regressions and variance partitioning were used to determine which environmental variables (i.e., BMP metrics, water chemistry parameters, habitat characteristics, and land use variables) were associated with benthic macroinvertebrate community structure. Water chemistry parameters were negatively associated with BMP metrics suggesting BMPs were mitigating losses of nutrients and sediments. However, BMP abundance and location explained minimal variation in benthic macroinvertebrate structure within the 30 sampled catchments. The absence of a strong association between BMPs and benthic macroinvertebrates may indicate a need for greater numbers and targeted siting of BMPS to improve water quality beyond a threshold point that would allow recolonization of intolerant invertebrate taxa. Focusing of conservation goals on ecological conditions and the promotion of BMPs that enhance in-stream habitat may also be required.
Download or read book Temporary Downstream Benthic Responses to Small dam Removal written by Kristy L. Rogers and published by . This book was released on 2006 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Assessing the Impacts of a Fuel Spill on the Benthic Macroinvertebrate and Diatom Communities in a Southern California Stream and River written by Robert Esquivel and published by . This book was released on 2016 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The impacts of a 20,993 L diesel and gasoline spill on the benthic macroinvertebrate (BMI) and diatom communities in Cold Creek and the Santa Ana River (below its confluence with Cold Creek) were assessed by comparing species richness, diversity and compositions between fuel-impacted and reference sites. BMIs and diatoms were sampled four times (13- 6 months after the spill) in sites located upstream from the spill (reference) and in sites located 0.5, 1.3, 2.7 and 3.0 km downstream from the spill (impact). BMI communities up to 2.7 km below the spill and in Cold Creek had (1) lower species richness and diversity for at least 25 months after the spill and (2) dissimilar species compositions for up to 26 months after the spill when compared to the reference site. Diatom communities up to 2.7 km below the spill and in Cold Creek had (1) similar or higher species richness and diversity when compared to the reference site and (2) dissimilar species compositions when compared to the reference site for the entirety of the study. BMI and diatom communities located 3.0 km below the spill and in the Santa Ana River had similar species richness, diversity and compositions when compared to the reference site. These results provide evidence that the fuel spill had an impact on the BMI and diatom communities in Cold Creek and that these communities are still changing.
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:
Download or read book Documentation of Aquatic Macrophyte Distribution in the Grand River Watershed written by Grand River Implementation Committee (Ont.) and published by . This book was released on 1981 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of Fine Sediment Effects on the Benthic Macroinvertebrates of a Southern Blue Ridge Escarpment Stream written by Stephen Martin Dillard and published by . This book was released on 1992 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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:
Download or read book Macroinvertebrate Community Analysis on Lower Hood River Before and During the Removal of Powerdale Dam written by and published by . This book was released on 2011 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: Powerdale Dam was an 87-year-old hydroelectric complex on lower Hood River in northern Oregon which was decommissioned in 2010. Macroinvertebrate samples were collected in 2009, before the removal process began, and in 2010, near the end of the demolition project, at one site upstream and three sites downstream of the dam. Macroinvertebrate communities were analyzed using both multi-metric (Benthic Index of Biotic Integrity [B-IBI]) and multivariate (Predictive Assessment Tool for Oregon [PREDATOR]) approaches, as well as EPT and Functional Feeding Group (FFG) analysis. All analytical approaches indicated declines in habitat quality in 2010 relative to 2009, and showed increasing impairment in the downstream sites in 2010, with sediment implicated as an impairment factor. Pollutants such as pesticides released from the impoundment might also contribute to downstream disturbance levels. The upstream, control site showed habitat quality declines in 2010 relative to 2009, indicating a possible upstream source of impairment. The demolition project did not physically impact upstream areas, and tributary turbidity does not appear to have been elevated relative to other years; however, the Hilsenhoff Biotic Index indicates an increase in upstream nutrient pollution in 2010 relative to 2009. Future research will be able to establish rate and extent of post-removal habitat recovery relative to these baseline data.
Download or read book Effects of Abnormal Thermal Stratification on a Reservoir Benthic Macroinvertebrate Community written by C. M. Cooper and published by . This book was released on 1980 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Impervious Surface Area and Benthic Macroinvertebrate Response as an Index of Impact from Urbanization on Freshwater Wetlands written by Anna L. Hicks and published by . This book was released on 1995 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Employment of Benthic Macroinvertebrate Populations as a Comparative Measure for Assessing the Effects of Best Management Practices in Alleviating the Impacts of Nonpoint Source Pollution written by David Anthony Schiappa and published by . This book was released on 1981 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: "A study was undertaken to determine the effect of BMPs (best management practices) on nonpoint source pollution."--Abstract.
Download or read book Rapid Bioassessment Protocols for Use in Wadeable Streams and Rivers written by United States. Environmental Protection Agency. Office of Water and published by . This book was released on 1999 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Land use Changes and the Physical Habitat of Streams written by Robert B. Jacobson and published by Geological Survey (USGS). This book was released on 2001 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
