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Impacts From Water Level Regulation On Benthic Macroinvertebrate Community Structure In Namakan Reservoir And Rainy Lake
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Book Synopsis Impacts from Water-Level Regulation on Benthic Macroinvertebrate Community Structure in Namakan Reservoir and Rainy Lake by : Daniel C. Mcewen
Download or read book Impacts from Water-Level Regulation on Benthic Macroinvertebrate Community Structure in Namakan Reservoir and Rainy Lake written by Daniel C. Mcewen and published by CreateSpace. This book was released on 2013-09-27 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors investigated how changing the magnitude and timing of water release in a regulated reservoir impacted macrobenthic invertebrates communities within Voyageurs National Park (VOYA), Minnesota with a before-after control-impact approach, using both multi- and univariate response measures to simultaneously compare impacts on macroinvertebrates across both time and treatment.
Book Synopsis Impacts of Water Level Regulation on Macroinvertebrate Communities in the Littoral Zone of Lakes by : Daniel Clayton McEwen
Download or read book Impacts of Water Level Regulation on Macroinvertebrate Communities in the Littoral Zone of Lakes written by Daniel Clayton McEwen and published by . This book was released on 2008 with total page 356 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 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 Changes in Benthic Macroinvertebrate Community Structure in Acid and Metal-contaminated Lakes Following Water Quality Improvements by :
Download or read book Changes in Benthic Macroinvertebrate Community Structure in Acid and Metal-contaminated Lakes Following Water Quality Improvements written by and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Changes in Benthic Macroinvertebrate Community Structure in Acid and Metal-contaminated Lakes Following Water Quality Improvements by : Jennifer A. Reasbeck
Download or read book Changes in Benthic Macroinvertebrate Community Structure in Acid and Metal-contaminated Lakes Following Water Quality Improvements written by Jennifer A. Reasbeck and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Evaluation of Benthic Macroinvertebrate Community Structure and Sediment Toxicity in Lake Taylorville by : Sanhita Datta
Download or read book An Evaluation of Benthic Macroinvertebrate Community Structure and Sediment Toxicity in Lake Taylorville written by Sanhita Datta and published by . This book was released on 1994 with total page 122 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 The Fish Communities of Rainy Lake and the Namakan Reservoir by : Yosef Cohen
Download or read book The Fish Communities of Rainy Lake and the Namakan Reservoir written by Yosef Cohen and published by . This book was released on 1991 with total page 155 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Analysis of the Benthic Macroinvertebrate Community Structure for Assessment of Water Quality of the Des Moines River by : Richard Leonard Westphal
Download or read book Analysis of the Benthic Macroinvertebrate Community Structure for Assessment of Water Quality of the Des Moines River written by Richard Leonard Westphal and published by . This book was released on 1973 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effects of Water Quality on Benthic Macroinvertebrate Community Structure, Waterford River Drainage Basin, St. John's by : Tony Clemens
Download or read book The Effects of Water Quality on Benthic Macroinvertebrate Community Structure, Waterford River Drainage Basin, St. John's written by Tony Clemens and published by . This book was released on 1985 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Determining the Association Between the Structure of Stream Benthic Macroinvertebrate Communities and Agricultural Best Management Practices by : Roger Holmes (M.Sc.)
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.
Book Synopsis Macroinvertebrate Community Structure and Function in Seasonal, Low-land, Tropical Streams Across a Pristine-rural-Urban Land-use Gradient by : Julie Elizabeth Helson
Download or read book Macroinvertebrate Community Structure and Function in Seasonal, Low-land, Tropical Streams Across a Pristine-rural-Urban Land-use Gradient written by Julie Elizabeth Helson and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effects of a Winter Lake Level Drawdown on the Benthic Macroinvertebrate Communities from Several Population Assemblages/habitat Areas Around Lake Bomoseen, Vermont by : Steve Fiske
Download or read book The Effects of a Winter Lake Level Drawdown on the Benthic Macroinvertebrate Communities from Several Population Assemblages/habitat Areas Around Lake Bomoseen, Vermont written by Steve Fiske and published by . This book was released on 1989 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Influence of Land Cover on Benthic Macroinvertebrate Community Structure in the Little Creek and Morgan Creek Watersheds by : Christy Jo Geraci
Download or read book The Influence of Land Cover on Benthic Macroinvertebrate Community Structure in the Little Creek and Morgan Creek Watersheds written by Christy Jo Geraci and published by . This book was released on 2002 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluating the Impacts of Winter Drawdown on Macroinvertebrate Communities Within the Context of Localized Environmental Conditions by : Gabrielle Trottier
Download or read book Evaluating the Impacts of Winter Drawdown on Macroinvertebrate Communities Within the Context of Localized Environmental Conditions written by Gabrielle Trottier and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "The regulation and management of lake water levels have become a major form of anthropogenic disturbance in temperate and boreal aquatic ecosystems. Drawing the water level down as the winter season progresses can lead to substantial exposure of the littoral zone, rendering it susceptible to desiccation and freezing. Such changes in the hydrological regime of littoral zones can have significant effects on aquatic biota, including macroinvertebrates. These organisms are widely considered as robust bioindicators, but it is also well known that their abundance and distribution is characterized by substantial patchiness. Often, scientists who use macroinvertebrates as bioindicators, focus their sampling on a single habitat type (e.g., stony littoral) to reduce the heterogeneity in macroinvertebrate distributions. However, applying such an approach in the context of an environmental stressor makes it difficult to draw general conclusions about the impact of a potential stressor on the entire littoral zone. Recently, a debate has emerged in the literature over the effects of water level drawdown on macroinvertebrate communities and we think that at least part of this debate may be due to different sampling strategies employed across studies to examine the effects of drawdown on macroinvertebrate communities. In order to evaluate how nearshore macroinvertebrate communities, from a variety of habitats, are affected by drawdown, we sampled 15 reservoirs and quantified macroinvertebrate abundance and composition. To these data, we applied a combination of (generalized) linear mixed effects models and multivariate analyses to answer the following question; what are the effects of drawdown on macroinvertebrate abundance and community composition? To address this question and incorporate the possible effects of heterogeneity in abundance and distribution of macroinvertebrates, we explicitly considered multiple physical environmental variables as additional predictors of macroinvertebrate abundance and community composition. We found that drawdown and thermal regime were significant predictors of macroinvertebrate abundance, but explained negligible amounts of variation in the community composition. Overall, these findings help elucidate how macroinvertebrate communities respond to winter drawdown and strengthen the knowledge on how localized environmental conditions influence macroinvertebrates. Furthermore we think that our sampling and analytical approach provides a useful template for other scientists to adopt when quantifying the effect of a potential stressor on nearshore macroinvertebrate communities." --
Book Synopsis Use of Structural Parameters of Benthic Macroinvertebrate Community for In-situ Evaluation of the Effect of Uranium Enrichment Wastewaters Upon Receiving Stream Water Quality by : Geoffrey L. Russell
Download or read book Use of Structural Parameters of Benthic Macroinvertebrate Community for In-situ Evaluation of the Effect of Uranium Enrichment Wastewaters Upon Receiving Stream Water Quality written by Geoffrey L. Russell and published by . This book was released on 1989 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
