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Influence Of Stream Habitat And Land Use On Benthic Macroinvertebrate Indicators Of Stream Quality Of Selected Above Tidal Streams In The Houston Galveston Area Council Service Area Texas 1997 98
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Book Synopsis Influence of Stream Habitat and Land Use on Benthic Macroinvertebrate Indicators of Stream Quality of Selected Above-tidal Streams in the Houston-Galveston Area Council Service Area, Texas, 1997-98 by : James Bruce Moring
Download or read book Influence of Stream Habitat and Land Use on Benthic Macroinvertebrate Indicators of Stream Quality of Selected Above-tidal Streams in the Houston-Galveston Area Council Service Area, Texas, 1997-98 written by James Bruce Moring and published by . This book was released on 2001 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Influence of Stream Habitat and Land Use on Benthic Macroinvertebrate Indicators of Stream Quality of Selected Above-tidal Streams in the Houston-Galveston Area Council Service Area, Texas, 1997-98 by : James Bruce Moring
Download or read book Influence of Stream Habitat and Land Use on Benthic Macroinvertebrate Indicators of Stream Quality of Selected Above-tidal Streams in the Houston-Galveston Area Council Service Area, Texas, 1997-98 written by James Bruce Moring and published by . This book was released on 2001 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Monthly Catalog of United States Government Publications by :
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 2001 with total page 838 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Water-resources Investigations Report by :
Download or read book Water-resources Investigations Report written by and published by . This book was released on 2001 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis New Publications of the U.S. Geological Survey by :
Download or read book New Publications of the U.S. Geological Survey written by and published by . This book was released on 2001-07 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis New Publications of the U.S. Geological Survey by : Geological Survey (U.S.)
Download or read book New Publications of the U.S. Geological Survey written by Geological Survey (U.S.) and published by . This book was released on 2001-07 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis New Publications of the Geological Survey by : Geological Survey (U.S.)
Download or read book New Publications of the Geological Survey written by Geological Survey (U.S.) and published by . This book was released on 2001 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Influence of Urbanization on Streams by : Gregory J. Knothe
Download or read book The Influence of Urbanization on Streams written by Gregory J. Knothe and published by . This book was released on 2012 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: Streams throughout the U.S. have been historically subjected to degradation due to urbanization, agriculture and industry. The influence of urbanization on stream ecosystems is difficult to evaluate, due to many interacting variables. Previous studies have found that the degree of urbanization influences flow regime, pollutant loading and resulting fish community structure. Our study investigated the influence of urbanization on hydrology, physical habitat, water quality, and resulting fish community structure at 8 coastal streams located in Southeastern Texas. Streamflow, physical habitat, water quality and fish community data were collected at these sites during 2011. The stream sites were selected to represent a variety of land uses ranging from highly urbanized, to minimally urbanized or reference conditions. In order to determine the degree of urbanization within each watershed ArcGIS software was used to assess land use. Total impervious area (TIA) and percent impervious area (PIA) was used for each watershed as a simple index of urbanization. TIA and PIA were estimated using 2006 impervious surface data obtained from the United States Geological Survey. Various fish community metrics including the Index of Biological Integrity (IBI), Shannon-Weiner diversity index, Pielou's evenness and species richness, were used to evaluate the impact of urbanization on fish community structure. Estimated land use data was compared to IBI scores, fish community metrics, water quality, and physical habitat. Several statistical analysis methods including Pearson correlation analysis, Analysis of Variance (ANOVA), principle component analysis and cluster analysis were used to evaluate the response of fish communities to land use and associated hydrology, physical habitat, and water quality. We found that IBI scores and stream fish diversity were negatively correlated with PIA. We also observed positive correlations between PIA/TIA and orthophosphate and combined nitrate and nitrite concentrations among the sites. We did not observe any strong correlations between the amount of impervious area within the upstream watershed and physical habitat metrics, with the exception of a negative correlation between TIA with mean instream cover, riparian width and tree canopy cover. Our study suggests that future management plans could include a threshold of impervious area for a watershed, in order to protect or promote biological integrity and water quality.
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 Benthic Macroinvertebrate Metacommunity Structure of the Guadalupe River Basin, TX by : Rebecca A. Zawalski
Download or read book Benthic Macroinvertebrate Metacommunity Structure of the Guadalupe River Basin, TX written by Rebecca A. Zawalski and published by . This book was released on 2017 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: Benthic macroinvertebrates (BMI) are widely used as bio-indicators for local in-stream quality. However, local community structure can be affected by smaller scale (local) environmental conditions and larger scale processes. I assessed the abundance and diversity of BMI and their relationship with local in-stream conditions, regional patterns of land-use/land cover (LULC), and large scale physiographic gradients across the Guadalupe River System, a large basin (3,256 km2) in Central Texas. Macroinvertebrates, water quality, and habitat conditions across 28 sites in the Guadalupe River and its main tributaries were sampled. Highest species diversity occurred near the headwaters, and decreased downstream. Pollution tolerance levels increased downstream and followed an increasing agriculture gradient. Landscape factors explained a large proportion of variation in macroinvertebrate community structure (38%), but 16% of it was spatially structured (shared with spatial factors latitude and longitude) and 4% was explained by spatial factors alone. Local environmental factors were strongly correlated with landscape factors and explained similar amount of variation as landscape factors. My study highlights the importance of incorporating physiographic gradients when examining local and regional diversity and composition of BMI communities, especially in large complex watersheds. My results will help develop more effective monitoring programs for larger river systems.
Book Synopsis Baseline Assessment of Fish Communities, Benthic Macroinvertebrate Communities, and Stream Habitat and Land Use, Big Thicket National Preserve, Texas, 1999-2001 by : James Bruce Moring
Download or read book Baseline Assessment of Fish Communities, Benthic Macroinvertebrate Communities, and Stream Habitat and Land Use, Big Thicket National Preserve, Texas, 1999-2001 written by James Bruce Moring and published by . This book was released on 2003 with total page 33 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 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 Indicators of Stream Health by : Tara Kristin Muenz
Download or read book Indicators of Stream Health written by Tara Kristin Muenz and published by . This book was released on 2004 with total page 340 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 Habitat Quality, Land Use, & Acidification by :
Download or read book Habitat Quality, Land Use, & Acidification written by and published by . This book was released on 1996 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Abiotic Influences on Benthic Stream Macroinvertebrates by : Joyce Mary Frances Diamond
Download or read book Abiotic Influences on Benthic Stream Macroinvertebrates written by Joyce Mary Frances Diamond and published by . This book was released on 1999 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
