Download or read book An Assessment of the Ecological Condition of the Barron River Using Macroinvertebrates as Bioindicators written by Satish C. Choy and published by . This book was released on 1999 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Assessment of the Ecological Condition of the Burnett River Using Macroinvertebrates as Bioindicators written by and published by . This book was released on 1999 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluating Benthic Macroinvertebrates as Bio indicators of Freshwater Habitat Quality in an Eastern Oregon Agro ecosystem written by Melissa A. Scherr and published by . This book was released on 2010 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effect of anthropogenic disturbance on river systems is gaining attention, and concerns about the state of freshwater natural resources are increasing globally, as are efforts to restore habitat that has been degraded by disturbance. In rivers, non-point source pollution affects the physical characteristics of the habitat and the endemic biotic assemblages. Aquatic macroinvertebrates are numerous and exhibit graded responses to various types of disturbance in the river, and may be used as indicators of habitat conditions. In this dissertation, macroinvertebrates were examined as bioindicators in the Umatilla River in eastern Oregon. The first study is a bioassessment of the impacts of agriculture on the benthic macroinvertebrate community in adjacent streams. The results of this study show that there are physical differences in habitat associated with adjacent land use, and the macroinvertebrate communities responded to these differences with changes in taxa richness and evenness. Indicator species analysis identified thirteen taxa which were indicative of habitat conditions associated with ideal habitat used as a reference condition, degraded habitat associated with agricultural land use, and transitional habitat associated with conservation/restoration management. The second study is a laboratory study in which the effects of temperature of a common mayfly nymph, Epeorus albertae (McDunnough) (Ephemeroptera: Heptageniidae) were evaluated. The study showed that not only the developmental rate of the nymphs was affected by temperature treatment (within a range of 18°C and 28°C), but the location of accumulated body tissues over time varied by temperature, with significant difference in the type of growth observed for insects held at the highest temperature. The third study examined the response of six indicator taxa to environmental variables as predictors of abundance in a non-parametric multiplicative regression. This study found that for all taxa examined, the two best predictors of abundance in the Umatilla River were turbidity and conductivity. Increased turbidity and conductivity are common effects of intensive agriculture in streams located in agro-ecosystems, but may potentially be mitigated by vegetative buffer strips and sustainable land use practices. Long term agricultural disturbance in the landscape has been shown to have lasting effects in the ecosystem which may be further exacerbated as global climate change increases dependence on freshwater resources. Understanding anthropogenic impacts on organismal communities and natural resources is vital to establishment of effective conservation, restoration, and maintenance of a healthy ecosystem.

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.

Download or read book Biological Assessment of River Health Using Macroinvertebrates written by Susan J. Nichols and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aquatic macroinvertebrates are commonly used biological indicators for assessing the health of freshwater resources. Compared to traditional methods, 'rapid' biological assessment methods provide a quicker turn-around of results, reduced costs and more easily interpreted results. The assumption underpinning many biological assessment methods is that the resulting macroinvertebrate sample is representative of the site at the scale to be assessed while still fulfilling the 'rapid' criteria of the bioassessment process. Complete enumeration of the invertebrates in the large samples that are usually collected is time consuming and costly, and would negate one of the 'rapid' components of bioassessment. Therefore, sub-sampling is often done by fixed time/count live-picking in the field or with preserved material using sample splitters in the laboratory. These methods are commonly used in conjunction with AUSRIVAS predictive models as part of Australia's National River Health Program. The macroinvertebrate sub-sample is expected to be adequate for assessing a site adequately in comparison to reference sites. This study examined the effects of sampling area, replication and sub-sampling methods on biological assessment results.

Download or read book Studies of Benthic Macroinvertebrates and Fish in Streams Within EPA Region 3 for Development of Biological Indicators of Ecological Condition written by Eric P. Smith and published by . This book was released on 1997 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Using Aquatic Macroinvertebrates to Assess Stream Condition in the Clackamas River Basin Oregon written by Jeff Adams and published by . This book was released on 2001 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Determination of Flow and Habitat Requirements for Selected Riverine Macroinvertebrates written by Christa Thirion and published by . This book was released on 2016 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: Freshwater invertebrates -- Habitat modification -- Ecological integration -- Flow modification -- Environmental water requirements -- Geographical distributions -- Ecoregion -- Geomorphological zonation -- Reference conditions -- Habitat suitability curves -- MIRAI (Macroinvertebrate Response Assessment Index) -- EcoStatus (Ecological Status) -- RHAMM (Rapid Habitat Assessment Method and Model) -- RIVDINT (River Data Integration System) -- FIFHA (The Fish Invertebrate Habitat Assessment Model).

Download or read book Using the Reference Condition Approach to Assess the Effects of Environmental Stressors on the Benthic Macroinvertebrate Community Structure of Precambrian Shield Headwater Streams written by Beth Gilbert and published by . This book was released on 2006 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Environmental Toxicology and Chemistry written by and published by . This book was released on 2000 with total page 976 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Water Research in Australia written by and published by . This book was released on 1989 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Sediment Classification Methods Compendium written by United States. Environmental Protection Agency. Sediment Oversight Technical Committee and published by . This book was released on 1992 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document is a compendium of scientifically valid and accepted methods that can be used to assess sediment quality and predict ecological impacts...the intent here is to provide the most useful overall measures or predictors of ecological impacts currently in use rather than procedures that may have limited application outside of a particular regulatory framework... parag The information provided in the compendium on the relative strengths and weaknesses of the different assessment methods can provide assistance in selecting the appropriate methods.

Download or read book Urban Stormwater Management in the United States written by National Research Council and published by National Academies Press. This book was released on 2009-03-17 with total page 611 pages. Available in PDF, EPUB and Kindle. Book excerpt: The rapid conversion of land to urban and suburban areas has profoundly altered how water flows during and following storm events, putting higher volumes of water and more pollutants into the nation's rivers, lakes, and estuaries. These changes have degraded water quality and habitat in virtually every urban stream system. The Clean Water Act regulatory framework for addressing sewage and industrial wastes is not well suited to the more difficult problem of stormwater discharges. This book calls for an entirely new permitting structure that would put authority and accountability for stormwater discharges at the municipal level. A number of additional actions, such as conserving natural areas, reducing hard surface cover (e.g., roads and parking lots), and retrofitting urban areas with features that hold and treat stormwater, are recommended.

Download or read book Stormwater Runoff and Receiving Systems written by Edwin Herricks and published by CRC Press. This book was released on 1995-07-25 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary focus of stormwater and urban runoff research during the past twenty-five years has been on the physical description and the chemical quality assessment of runoff events and the design and implementation of the best management practices to control these events. There is a definite need for more effective integration of receiving system issues in the management and regulation of stormwater runoff. This book successfully brings together a diverse group of environmental specialists to address the issues surrounding the assessment, management, and control of stormwater, and more specifically urban runoff, from a receiving system perspective. The book's emphasis on the receiving system is timely, coming during a period when the U.S. Environmental Protection Agency is placing increasing emphasis on wet weather conditions through a new permit program for stormwater runoff and a policy on combined sewer overflows. Stormwater Runoff and Receiving Systems covers biocriteria, assessment of receiving water integrity, and integrated watershed analysis-all aspects of current water quality management programs for both industrial and municipal areas. More than thirty chapters are divided into six sections, offering in-depth discussions on various issues relating to stormwater, urban runoff, and receiving systems; impacts; uncertainty and risk; study design; impact mitigation; and issues analysis. Anyone who deals with regulatory programs requiring stormwater effect assessment including more than sampling and analysis of chemical water quality parameters in effluents will find this reference particularly useful.

Download or read book Ecology of Industrial Pollution written by Lesley C. Batty and published by Cambridge University Press. This book was released on 2010-02-18 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Written for researchers and practitioners in environmental pollution, management and ecology, this interdisciplinary account explores the ecological issues associated with industrial pollution to provide a complete picture of this important environmental problem from cause to effect to solution. Bringing together diverse viewpoints from academia and environmental agencies and regulators, the contributors cover such topics as biological resources of mining areas, biomonitoring of freshwater and marine ecosystems and risk assessment of contaminated land in order to explore important questions such as: What are the effects of pollutants on functional ecology and ecosystems? Do current monitoring techniques accurately signal the extent of industrial pollution? Does existing policy provide a coherent and practicable approach? Case studies from throughout the world illustrate major themes and provide valuable insights into the positive and negative effects of industrial pollution, the provision of appropriate monitoring schemes and the design of remediation and restoration strategies.

Download or read book Handbook of Ecotoxicology written by David J. Hoffman and published by CRC Press. This book was released on 2002-11-13 with total page 1316 pages. Available in PDF, EPUB and Kindle. Book excerpt: Completely revised and updated with 18 new chapters, this second edition includes contributions from over 75 international experts. Also, a Technical Review Board reviewed all manuscripts for accuracy and currency. Focusing on toxic substance and how they affect the ecosystems worldwide, the book presents methods for quantifying and measuring ecotoxicological effects in the field and in the lab, as well as methods for estimating, predicting, and modeling in ecotoxicology studies. This is the definitive reference for students, researchers, consultants, and other professionals in the environmental sciences, toxicology, chemistry, biology, and ecology - in academia, industry, and government.

Download or read book Water Quality Monitoring and Assessment written by Stephanie Fraser and published by . This book was released on 2020-09-08 with total page 243 pages. Available in PDF, EPUB and Kindle. Book excerpt: The biological, radiological, chemical and physical traits of water are known as water quality. It is a measure of the water condition related to the requirements of biotic species and to human need. The health of ecosystems, safety of human contact, and drinking water are the most common standards used to measure water quality. Water quality parameters can be categorized into human consumption, environmental water quality, and industrial and domestic use. The measurement of water quality includes the process of sample collection, chemical analysis, real-time monitoring and testing in response to natural disasters. Various environmental indicators such as physical, chemical and biological indicators are also observed and used for the monitoring of water quality. This book explores all the important aspects of water quality in the present day scenario. It elucidates new techniques and their applications in a multidisciplinary manner. It will prove to be immensely beneficial to students and researchers in this field.