Author: C. Girton
Publisher:
ISBN:
Category :
Languages : en
Pages :

View

Book Description

Author: D. Pascoe
Publisher: Elsevier
ISBN: 1483158861
Category : Science
Languages : en
Pages : 176

View

Book Description
Freshwater Biological Monitoring contains the proceedings of a Specialized Conference held in Cardiff, Wales, on September 12-14, 1984. Contributors explore advances in freshwater biological monitoring, paying particular attention to the interpretation of traditional community surveillance studies by means of the modern computer and multivariate statistical techniques and how such field community responses are related to laboratory studies of pollutants. The design, validation, and use of novel monitoring systems employing plants, invertebrates, and fish are considered, along with developments in the in vitro assessment of mutagenicity of chemicals present in water. This book is comprised of 16 chapters and begins with a review of issues surrounding the tests used in biological monitoring and the ways in which the information will be used. The discussion then turns to the usefulness of the colonization sampler in collecting macroinvertebrates indicative of river water quality in lowland rivers; biological assessment of water quality and conservation evaluation in Welsh rivers; and water chemistry, benthos, and drift in a fast-flowing river. The following chapters focus on eutrophication in rivers; toxicity testing with freshwater macroinvertebrates; and compliance biomonitoring. This monograph will be of value to policymakers and environmentalists concerned with water pollution control.

Author: Mi-Young Song
Publisher:
ISBN:
Category :
Languages : en
Pages : 99

View

Book Description
In this study, we applied the SOM for ecological assessment using benthic macroinvertebrates in aquatic ecosystem. First, Chapter I, SOM was utilized to extract information from complex data of environmental variables and benthic macroinvertebrate communities residing in different micro-habitats. Although the sampling was carried out in a limited area, the patterns of environmental variables revealed spatial heterogeneity. The clustering of benthic macroinvertebrate communities in the trained SOM was efficient in showing temporal variation and evaluating water quality according to the conditions of different micro-habitats. Consequently, local spatial heterogeneity is important in revealing dynamics of community abundance and biotic indices, especially regarding restoration processes in polluted streams. Chapter II, the samples were grouped into three main clusters corresponding to distinc EPTC assemblages in the tributary streams of the Garonne River catchment, southern France. Lower richness and diversity of macroinvertebrates were observed in the areas affected by agricultural land use, being associated with high Total Dissolved Solids (TDS), Nitrate (NO3) and Chemical Oxygen Demand (COD). Tolerant EPTC species were identified as controlling parameters for the changes in the assemblages collected at the agricultural-impacted sites...

Author: Henri J. Dumont
Publisher: Springer Science & Business Media
ISBN: 1402097263
Category : Science
Languages : en
Pages : 819

View

Book Description
What have we learnt about the Nile since the mid-1970s, the moment when Julian Rzóska decided that the time had come to publish a comprehensive volume about the biology, and the geological and cultural history of that great river? And what changes have meanwhile occurred in the basin? The human popu- tion has more than doubled, especially in Egypt, but also in East Africa. Locally, industrial development has taken place, and the Aswan High Dam was clearly not the last major infrastructure work that was carried out. More dams have been built, and some water diversions, like the Toshka lakes, have created new expanses of water in the middle of the Sahara desert. What are the effects of all this on the ec- ogy and economy of the Basin? That is what the present book sets out to explore, 33 years after the publi- tion of “The Nile: Biology of an Ancient River”. Thirty-seven authors have taken up the challenge, and have written the “new” book. They come from 13 different countries, and 15 among them represent the largest Nilotic states (Egypt, Sudan, Ethiopia, Uganda, and Kenya). Julian Rzóska died in 1984, and most of the - authors of his book have now either disappeared or retired from research. Only Jack Talling and Samir Ghabbour were still available to participate again.

Author: Larry R. Brown
Publisher:
ISBN:
Category : Benthos
Languages : en
Pages : 34

View

Book Description

Author: Thomas P. Simon
Publisher: CRC Press
ISBN: 1420041452
Category : Nature
Languages : en
Pages : 597

View

Book Description
The use of environmental assessment procedures within monitoring frameworks demands that there be some relevancy to the decisions that management agencies make using biological criteria. These biological criteria standards are the basis for environmental indicators, which provide a direct measure of environmental quality. Biological Response Signat

Author: David M. Rosenberg
Publisher: Springer
ISBN:
Category : Nature
Languages : en
Pages : 512

View

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: M. Jungwirth
Publisher: Springer Science & Business Media
ISBN: 9401141649
Category : Technology & Engineering
Languages : en
Pages : 491

View

Book Description
The assessment of the ecological integrity of running waters is a prerequisite to an understanding of the effects of human alterations. The evaluation of degradation processes provides key information on how to avoid further negative impacts. The success of future conservation, mitigation and restoration activities will rely on sound assessment methodologies and their ecological relevance and applicability. Assessment methodologies are therefore an integral part of sustainable river management. This book synthesizes and discusses state-of-the-art experiences in assessment methodologies. Including the latest knowledge on structures, processes and functions of running waters as a fundamental basis for developing adequate assessment methods, the book focuses on method development, application, and in particular on integrated assessment methods. This book is directed at scientists and managers with the aim of more effective preservation, restoration and maintenance of the ecological integrity of running water ecosystems.

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :

View

Book Description
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).

Author: Robert Converse Bailey
Publisher: Springer Science & Business Media
ISBN: 9781402076701
Category : Health & Fitness
Languages : en
Pages : 186

View

Book Description
Quantifying the effect(s) of human-induced changes on aquatic ecosystems is a fundamental objective in ecological assessment, and one that often requires the use of a reference condition. Because of the widespread degradation of many aquatic ecosystems, finding pristine or even minimally disturbed reference sites can be a challenging (read frustrating) and costly endeavour. This book gives a comprehensive description of present-day concepts and practices in working with the use of references in quantifying departures from conditions expected with no or only minimal anthropogenic effects.