Download or read book Preliminary Evaluation of Selected Pesticides in the Nicomekl River Watershed Lower Fraser Valley B C and Proposed Approaches for Assessing Toxicity to Aquatic Biota written by and published by . This book was released on 1989 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pesticides Research and Monitoring Annual Report written by and published by . This book was released on 1988 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Assessment of Pesticides in the Lower Wabash River Basin and Kankakee River Basin written by Ryan McDuffee and published by . This book was released on 2002 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Guidance Document written by P. J. Campbell and published by . This book was released on 1999 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effects of In use Pesticides on Aquatic Biota in Selected Lower Fraser River Tributaries written by and published by . This book was released on 1988 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Predicting the Bioavailability and Toxicity of Hydrophobic Pesticides Using Bioassays and a Solid Phase Microextraction Approach written by Yuping Ding and published by . This book was released on 2012 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pesticides are unique chemical stressors in that they are designed to have biological activity and are intentionally released into the environment in large quantities. Although the use of pesticides has resulted in effective pest control and increased crop production, pesticide use has caused unintended adverse effects on non-target species. Assessing the risk of pesticides is challenging in part due to the complications created by bioavailability issues. Bioavailability is an important factor in risk assessment. Solid phase microextraction (SPME) is an equilibrium partitioning technique that has been successfully used to estimate body residues by measuring the freely dissolved chemical concentration and assessing chemical bioavailability in exposure media. The objectives of this dissertation were to: (1) Investigate if legacy and emerging sediment-associated pesticides are widely distributed in agricultural and urban areas of Illinois, and to evaluate if the pesticides cause acute toxicity to benthic organisms; (2) Evaluate the potential use of SPME fiber to estimate pesticide toxicity and organism body residue in water-only tests; (3) Expand the application of matrix-SPME to estimate bioavailability and toxicity of legacy and emerging pesticides in sediment. The statewide investigation showed that legacy and current-use pesticides in sediment were widely distributed in urban and agricultural waterways from Illinois, USA. There were more toxic urban sites than agricultural sites. The SPME fiber was an effective dose metric to evaluate the toxicity of hydrophobic pesticides to the midge Chironomus dilutus and the amphipod Hyalella azteca , in water and sediment exposures. Equilibrium/equilibrium-equivalent SPME fiber concentrations were related to tissue residues, and significant linear relationships were found between the parent compound in the biota and the SPME fiber concentrations. This result occurred regardless of which chemical was tested, whether biotransformation occurred, or if the chemical reached steady state in the organisms. The equilibrium fiber concentrations of permethrin and sum dichlorodiphenyltrichloroethane equivalents were reduced with an increase in sediment aging time, and this was suggestive of a decrease in freely dissolved pore water concentration and subsequently a decrease in bioavailability. Given the results from this dissertation and other previous work, the SPME fiber could be potentially used as a surrogate for assessing bioavailability and toxicological risk of hydrophobic pesticides to benthic organisms. It may provide an additional line of evidence in weight-of-evidence approaches for assessing the effects of hydrophobic pesticides in environmental risk assessments.
Download or read book Groundwater Pesticide Contamination in Selected Aquifers of the Lower Fraser Valley written by Canada. Inland Waters Directorate and published by . This book was released on 1989 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Health of Our Water written by D. R. Coote and published by Research Branch Agriculture and Agri-Food Canada. This book was released on 2000 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: Using a variety of research findings and case studies, this publication provides a broad picture of water quality and quantity in Canada as they are affected by agriculture and as they affect agriculture itself. The first part contains background on the water cycle, water supplies in Canada, agriculture & other rural uses of water, and issues related to water quality. The second part describes what is currently known about the health of Canada's rural surface water and groundwater, and the implications for natural ecosystems. The third part describes responses to the various issues of water quality & quantity, citing farming practices and regulatory tools, among other measures. The final part discusses how the growth of agriculture may be limited by issues related to water and how the future might proceed. Includes glossary.
Download or read book Wildlife Ecotoxicology written by John E. Elliott and published by Springer Science & Business Media. This book was released on 2011-08-27 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many books have now been published in the broad field of environmental toxicology. However, to date, none of have presented the often fascinating stories of the wildlife science, and the steps along the way from discovery of problems caused by environmental pollutants to the regulatory and non-regulatory efforts to address the problems. This book provides case by case examinations of how toxic chemical effects on wildlife have brought about policy and regulatory decisions, and positive changes in environmental conditions. Wild animal stories, whether they are about the disappearance of charismatic top predators, or of grossly deformed embryos or frogs, provide powerful symbols that can and have captured the public's imagination and have resulted in increased awareness by decision makers. It is the intent of this book to present factual and balanced overviews and summaries of the science and the subsequent regulatory processes that followed to effect change (or not). We cover a variety of chemicals and topics beginning with an update of the classic California coastal DDT story of eggshell thinning and avian reproduction to more recent cases, such as the veterinarian pharmaceutical that has brought three species of Asian vultures to the brink of extinction. Researchers, regulators, educators, NGOs and the general public will find valuable insights into the processes and mechanisms involved both in environmental scientific investigation and in efforts to effect positive change.
Download or read book Geology and Natural Hazards of the Fraser River Delta British Columbia written by John Joseph Clague and published by . This book was released on 1998 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 16 papers in this volume constitute a summary of recent research on the geological architecture and environment of the Fraser River delta, and the physical and chemical processes operating on it. The first two papers are overviews of the geological and seismic setting of the delta. The next two papers summarize present-day sedimentary environments on the delta. A third group of papers covers the geological architecture, or lithostratigraphy, of the delta and the biological structure or biofacies of the delta. The final group of papers is concerned with natural hazards and environmental issues, including earthquakes, geotechnical stability, and seafloor sediment geochemistry.
Download or read book Pesticides in Urban Environments written by Kenneth D. Racke and published by . This book was released on 1993 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of a symposium held in San Francisco in April 1992. The urban environment discussed includes homes, yards, gardens, public parks, golf courses, and restaurants. Some common products for the urban market are turf pesticides, termiticides, home and garden pesticides, indoor pesticides, and rodenticides. The papers are divided into five sections, each focusing on a different facet of urban pesticide use: pests and pesticides, dissipation of pesticides, mobility of pesticides, urban pesticides and humans, and urban pesticides and nontarget animals. Annotation copyright by Book News, Inc., Portland, OR
Download or read book Sustainable Urban Landscape written by Patrick M. Condon and published by UBC James Taylor Chair in Landscape and Liveable Environments. This book was released on 2002 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sustainable Urban Landscapes written by University of British Columbia. James Taylor Chair in Landscape and Liveable Environments and published by University of Washington Press. This book was released on 1996 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is about how to make our new neighbourhoods more sustainable than they are now. By sustainable, we mean the maintenance of the ecological health of our neighbourhoods and the provision of equitable access to affordable housing for our children. We hope that this book will be of interest to everyone; from the public officials and private developers who participate in developing and managing the urban landscape today to the secondary-school students who will shoulder these responsibilities tomorrow. This book includes four different designs for the same 400-acre site in Surrey, British Columbia, each design having been produced by a team of architects and landscape architects, working 'en charrette.'
Download or read book Dams Fish and Fisheries written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2001 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: The importance of free longitudinal passage of river fauna is stressed.
Download or read book Aquatic Toxicology and Risk Assessment written by Monte A. Mayes and published by ASTM International. This book was released on 1991 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proceedings of the 14th ASTM Symposium on [title], held in San Francisco, April 1990, comprise 26 peer-reviewed papers in the areas of: the Animal Welfare Act, biomarkers, risk assessment, toxicant reduction strategies, carcinogenesis, bioconcentration, toxicity evaluation, organ system toxicolo
Download or read book Current Research 1994 written by and published by . This book was released on 1994 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Toxicological Profile for Chlorpyrifos written by and published by . This book was released on 1997 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
