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Land Use Impacts On Benthic Macroinvertebrate Communities In The Central Grand River Basin
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Book Synopsis Land Use Impacts on Benthic Macroinvertebrate Communities in the Central Grand River Basin by : Shannon Pennington
Download or read book Land Use Impacts on Benthic Macroinvertebrate Communities in the Central Grand River Basin written by Shannon Pennington and published by . This book was released on 1999 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Impacts of Land Use Disturbance on Fish and Aquatic Macroinvertebrate Assemblages in the Nolichucky River Watershed by : Hayley Sonia Gotwald
Download or read book Impacts of Land Use Disturbance on Fish and Aquatic Macroinvertebrate Assemblages in the Nolichucky River Watershed written by Hayley Sonia Gotwald and published by . This book was released on 2016 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt: Southern Appalachian watersheds of the United States are negatively affected by pesticides and fertilizers used in row crop agriculture. The objective was to determine if the amount of row crops is connected to changes in aquatic biotic assemblages draining the Nolichucky River watershed in east Tennessee. The hypothesis was the amount of row crops will negatively correlate with indices of biotic integrity (IBI) metrics for fish and benthic macroinvertebrates indicating healthy aquatic communities. For 18 sample sites in 2014 and 2015, IBI metrics were calculated. Water quality and elevation measurements were made before conducting IBIs. To assess changes in and amounts of land use/land cover (LULC), maps from 1999 to 2014 were produced with Landsat satellite imagery. Pollutant estimates (sediment, phosphorus, and nitrogen) were calculated using the Soil & Water Assessment Tool (SWAT) model. The area of row crops increased since 1999 (39 km2 in 1999 to 71 km2 in 2014). A principal component analysis was performed on LULC measurements from different scales (local, reach and catchment), water quality data, and elevation to produce a reduced set of explanatory variables that were uncorrelated but could be associated with IBI metrics. A canonical correspondence analysis associated fish metrics with LULC types: Impervious surfaces, non-row crop fields, and forest (p = 0.04 for axis 1 eigenvalue, p = 0.05 for species-environment correlations). For the benthic macroinvertebrate metrics, nonmetric multidimensional scaling found metrics indicative of poor stream health (percentage of oligochaetes and chironomids, percentage of nutrient tolerant organisms) were strongly positively associated with increasing use of row crops, impervious surfaces (p ≤ 0.01), and pollutant estimates (p ≤ 0.004). A redundancy analysis found increasing pollutant estimates were associated with fish metrics indicative of poor stream health (percentages of hybrids, piscivores, diseased fish, and number of sunfish species) (p = 0.03). When watersheds of tributary streams are converted to impervious and non-row crop field LULC, they function biologically like the larger main stem river. Although fish and benthic macroinvertebrate metrics indicated the tributary and main stem Nolichucky sites were in relatively good condition, increases in land conversion can further degrade stream biotic integrity.
Book Synopsis Relationships Between Upstream Land Use at Multiple Spatial Scales and Benthic Macroinvertebrate Community Composition in the Deerfield River Watershed of Vermont and Massachusetts by : Jason Saltman
Download or read book Relationships Between Upstream Land Use at Multiple Spatial Scales and Benthic Macroinvertebrate Community Composition in the Deerfield River Watershed of Vermont and Massachusetts written by Jason Saltman and published by . This book was released on 2009 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this study, I examined relationships between land-use patterns and macroinvertebrate communities in 45 first through fourth-order stream reaches in four subwatersheds within a New England watershed. Land-use patterns were quantified in GIS at three spatial scales to determine the effect of scale on the strength of relationships between instream biological conditions and adjacent land-use conditions. A GIS was used to quantify forest, agricultural, and developed land use at three spatial scales, including the entire upstream catchment area and two sub-corridors. Macroinvertebrate communities were analyzed using a multimetric approach and a multivariate approach to relate community composition to land-use variables measured at each spatial scale. Among community metrics, richness, EPT richness, percent affinity, and total metric scores were significantly correlated with quantified land-use variables, including percent forest, percent agriculture, percent developed, and percent agriculture + developed at the upstream catchment scale. Land-use variables also showed significant correlations with community composition as indicated by ordination axes resulting from multivariate analysis. Results of the approaches were in general agreement with each other, each indicating that relationships between instream benthic conditions and adjacent land use were strongest at the entire-upstream-catchment scale. These results suggest that conditions and processes occurring at this scale appear to be more influential than are localized adjacent land-use conditions in shaping community composition and in-stream biological conditions.
Book Synopsis Impacts of Land Use on the Habitat and Macroinvertebrate Assemblage of the Tributaries of the Lower Brazos River by : Frances Patricia Lash
Download or read book Impacts of Land Use on the Habitat and Macroinvertebrate Assemblage of the Tributaries of the Lower Brazos River written by Frances Patricia Lash and published by . This book was released on 2011 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ecological research on stream and river ecosystems aims to gain an understanding of the dynamic and complex impacts of environmental factors on biotic communities within riverine landscape (riverscape). Human activities significantly impact both terrestrial and aquatic ecosystems. Local environmental factors are known to influence the structure and function of stream ecosystems and biodiversity. The patterns of benthic macroinvertebrate distribution are related to the natural and human influenced variation of environmental factors. Ecologists assess stream physical and biological conditions in response to human land use activities using ecological indicators. This study is an assessment of the ecological condition of the Lower Brazos River Watershed. Macroinvertebrate assemblage structure was compared from 33 sites within the 6 subbasins differing in land use type and degree. Land use within the subbasins was measured using data from the National Land Use Database. Benthic macroinvertebrate samples were collected and a variety of physiochemical variables were measured. Multivariate analysis grouped the subbasins using habitat variables and macroinvertebrate assemblages. Decreasing habitat heterogeneity resulted in a decline of diversity and richness of organisms. Differences in the richness and diversity of the macroinvertebrate assemblages are attributed to habitat structure and land use. This study highlights the importance of considering both local habitat and landscape parameters of watersheds in stream biological assessments to understand the response of benthic communities to disturbances.
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 Watershed Land Use on the Benthic Macroinvertebrate Assemblages in Ridge and Valley Streams in Chattanooga, Tennessee by : Paul Leiper Freeman
Download or read book Effects of Watershed Land Use on the Benthic Macroinvertebrate Assemblages in Ridge and Valley Streams in Chattanooga, Tennessee written by Paul Leiper Freeman and published by . This book was released on 1999 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Examination of the Effects of Land Use and Land Cover on Macroinvertebrate Communities at Two Landscape Scales by : Tanya Sulikowski
Download or read book An Examination of the Effects of Land Use and Land Cover on Macroinvertebrate Communities at Two Landscape Scales written by Tanya Sulikowski and published by . This book was released on 2013 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Watershed Land Use Patterns on Benthic Macroinvertebrate Biotic Integrity in Northern Prince George's County, MD, USA by : Laura E. McGee
Download or read book Effects of Watershed Land Use Patterns on Benthic Macroinvertebrate Biotic Integrity in Northern Prince George's County, MD, USA written by Laura E. McGee and published by . This book was released on 2005 with total page 182 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 Influences of Elevation, Stream Size, and Land Use on Structure, Function, and Production of Benthic Macroinvertebrate Communities in Two Southern River Ecosystems by : Jack William Grubaugh
Download or read book Influences of Elevation, Stream Size, and Land Use on Structure, Function, and Production of Benthic Macroinvertebrate Communities in Two Southern River Ecosystems written by Jack William Grubaugh and published by . This book was released on 1994 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Use of Benthic Macroinvertebrates to Assess Impacts of Agricultural Land Use in Nontidal Coastal Plain Streams by : Diane Katharine Barnes
Download or read book Use of Benthic Macroinvertebrates to Assess Impacts of Agricultural Land Use in Nontidal Coastal Plain Streams written by Diane Katharine Barnes and published by . This book was released on 2004 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Land Use on Macroinvertebrate Communities by : Nancy Welchel Bishop
Download or read book Effects of Land Use on Macroinvertebrate Communities written by Nancy Welchel Bishop and published by . This book was released on 2000 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Selected Water Resources Abstracts by :
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1990 with total page 972 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Land-use Changes and the Physical Habitat of Streams by : Robert B. Jacobson
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:
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 RELATIONSHIP BETWEEN LAND USE, HABITAT, AND AQUATIC BENTHIC INVERTEBRATE COMMUNITIES IN TROPICAL MONTANE FORESTS by : Savannah Justus
Download or read book RELATIONSHIP BETWEEN LAND USE, HABITAT, AND AQUATIC BENTHIC INVERTEBRATE COMMUNITIES IN TROPICAL MONTANE FORESTS written by Savannah Justus and published by . This book was released on 2017 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research shows that changes in surrounding land use may have negative impacts on freshwater benthic systems through changes in surrounding physical habitat, increased nutrient inputs, or non-point pollution (Neumann & Dudgeon 2002). Riparian zone condition can alter erosion and sediment input, temperature, and food availability. Benthic macroinvertebrates play a key role in ecosystem processing in freshwater systems and are indicators of environmental stress. Although the effects of agricultural land use has been studied in temperate regions, little research has been done in Costa Rica, where high deforestation rates are threatening tropical montane forests (Foster 2001). This study compares invertebrate communities between protected forested streams and streams surrounded by agricultural land to understand how macrohabitat and microhabitat features affect richness, diversity, and community composition. Forested streams had significantly higher richness, diversity, habitat indicator scores, and QHEI scores. Channel morphology and riparian zone condition scores were significantly higher in forested streams. Riffles had more similar communities than pools based on Bray- Curtis dissimilarity. Overall, agricultural streams are a less suitable habitat for benthic macroinvertebrates but it is still unclear if microhabitat or macrohabitat differences have a stronger effect on community structure. This study reflects the importance of understanding how natural variation compares to large-scale land use. As agricultural expansion continues, we must understand how this will affect stream systems so we are able to mitigate any negative effects.
Book Synopsis Water-quality Assessment of the Central Nebraska Basins by : Robert B. Swanson
Download or read book Water-quality Assessment of the Central Nebraska Basins written by Robert B. Swanson and published by . This book was released on 2000 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
