A Multimetric Analysis of Benthic Macroinvertebrates Present Downstream of a Small, Run-of-the-River Dam in Upstate New York PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download A Multimetric Analysis of Benthic Macroinvertebrates Present Downstream of a Small, Run-of-the-River Dam in Upstate New York PDF full book. Access full book title A Multimetric Analysis of Benthic Macroinvertebrates Present Downstream of a Small, Run-of-the-River Dam in Upstate New York by Olive Streeter Chen. Download full books in PDF and EPUB format.
Author: Olive Streeter Chen
Publisher:
ISBN:
Category : Biotic communities
Languages : en
Pages : 0
Get Book Here
Book Description
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.
Author: Olive Streeter Chen
Publisher:
ISBN:
Category : Biotic communities
Languages : en
Pages : 0
Get Book Here
Book Description
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.
Author: Alexander Johnston Smith
Publisher:
ISBN:
Category : Freshwater invertebrates
Languages : en
Pages : 56
Get Book Here
Book Description
Author: Karl W. Simpson
Publisher:
ISBN:
Category : Benthos
Languages : en
Pages : 166
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Benthic animals
Languages : en
Pages : 54
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Dam retirement
Languages : en
Pages : 38
Get Book Here
Book Description
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.
Author:
Publisher:
ISBN:
Category : Water quality bioassay
Languages : en
Pages : 192
Get Book Here
Book Description
Author: Kirby Lynn McCready Wright
Publisher:
ISBN:
Category : Benthic animals
Languages : en
Pages : 0
Get Book Here
Book Description
Benthic macroinvertebrate communities in riverine ecosystems are shaped by both local and large-scale influences. Most models of riverine community structure are grouped into either discrete or continuum conceptual models. However, there is much uncertainty in how these two classes of conceptual models apply to macroinvertebrate communities in the physicochemically consistent headwaters of spring-influenced rivers. This thesis examined benthic macroinvertebrate community composition and biomass among local discrete geomorphic mesohabitats (riffles, runs, and pools) and along an upstream to downstream gradient in two spring-fed rivers in central Texas (San Marcos River and Comal River, Hays County). The goal of my thesis was to examine the relative importance of downstream distance from springhead versus smaller-scale habitat conditions (i.e., mesohabitat units) in explaining the variation in macroinvertebrate community structure in these two spring-based subtropical riverine systems. I hypothesized that, because I sample in the upper physicochemically consistent reaches of both rivers that local mesohabitat conditions would explain more variation in community composition than downstream distance from springhead. I expected this change in community composition would be driven by replacement of taxa rather than differences in taxonomic richness. I also predicted that non-native benthic species would be more evenly distributed throughout the study reaches due to the consistency of physicochemical conditions. Finally, I predicted that the distribution of taxa specific biomass contributions will follow patterns seen in community composition change and will reflect taxonomic density estimates. To test these hypotheses, I sampled macroinvertebrates and local habitat parameters from mesohabitat types along three reaches in the first ~4 km of each river. I also determined biomass of each taxon and community-wide patterns of biomass distribution of benthic macroinvertebrates. I found that variation in taxonomic composition in both rivers was driven to a greater or equal amount by upstream to downstream distance from spring-influence, and by mesohabitat type. Taxonomic diversity did not vary with distance from springhead but was consistently lower in pool mesohabitats when compared to runs and riffles in both rivers. Compositional changes and patterns in b-diversity within mesohabitat types among study reaches indicated that replacement (as opposed to richness differences) was the main mechanism leading to patterns of b-diversity. I found that a non-native snail (Tarebia granifera) and an endemic spring snail (Elimia comalensis) appear to be spatially partitioning habitat in an upstream- to downstream manner. Finally, I found that Tarebia granifera constituted the largest proportion of benthic macroinvertebrate biomass in several study reaches downstream from springheads.
Author: David M. Rosenberg
Publisher: Springer
ISBN:
Category : Nature
Languages : en
Pages : 512
Get Book Here
Book Description
North American and European governments have adopted national programs for environmental monitoring and assessment that include the use of aquatic biota. These programs will use a variety of indicators of environmental health; benthic macroinvertebrates are one of the most promising of them. The chapters in this book deal with the many different approaches available for using benthic macroinvertebrates in biological monitoring programs.
Author: Abile Teshita
Publisher: LAP Lambert Academic Publishing
ISBN: 9783659311888
Category :
Languages : en
Pages : 68
Get Book Here
Book Description
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.
Author: Zachary M. Smith
Publisher:
ISBN:
Category : Freshwater invertebrates
Languages : en
Pages : 260
Get Book Here
Book Description
