Download or read book Investigating the Role of Environmental Contamination in Teratogenicity Rates of Spotted Salamanders Ambystoma Maculatum written by Olivia Hodgson and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Organic contaminants are anthropogenic chemicals that persist in the environment because they resist degradation through chemical and biological processes. These chemicals can inadvertently affect non-target organisms that live in contaminated soil or water, such as amphibians. If amphibians are exposed to organic chemicals during crucial early life stages, it could lead to teratogenic (i.e., developmental) effects. This study aimed to determine the relationship between contaminants (i.e., herbicides, insecticides, and other organic contaminants) and teratogenic limb malformations in adult spotted salamanders (Ambystoma maculatum) on Penn State Behrend's campus. Soil and sediment were collected from salamander breeding locations on campus and extracted using 24-hr Tenax extractions. The extracts were analyzed via gas chromatography-mass spectrometry (GC-MS) to identify and quantify the contaminant concentrations within the samples. It was found that four of the six salamander breeding ponds have physical deformities that exceed the 5% threshold for a healthy population, and seventy-four organic contaminants were detected in the soil and sediment at each breeding pond. Like other amphibians, spotted salamanders are an indicator species, which means that the state of the spotted salamander populations on campus reflects the ecosystem. The presence and severity of deformities in the salamander population indicates that these habitats are under stress, with environmental contamination being a likely contributor. As such, this research stands as a case study to better understand the role of organic contaminants in the health of amphibian populations living in suburban areas.
Download or read book Animal Biomarkers as Pollution Indicators written by David B. Peakall and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ecotoxicology is a relatively new scientific discipline. Indeed, it might be argued that it is only during the last 5-10 years that it has come to merit being regarded as a true science, rather than a collection of procedures for protecting the environment through management and monitoring of pollutant discharges into the environment. The term 'ecotoxicology' was first coined in the late sixties by Prof. Truhaut, a toxicologist who had the vision to recognize the importance of investigating the fate and effects of chemicals in ecosystems. At that time, ecotoxicology was considered a sub-discipline of medical toxicology. Subsequently, several attempts have been made to portray ecotoxicology in a more realistic light. Notably, both F. Moriarty (1988) and F. Ramade (1987) emphasized in their books the broad basis of ecotoxicology, encompassing chemical and radiation effects on all components of ecosystems. In doing so, they and others have shifted concern from direct chemical toxicity to man, to the far more subtle effects that pollutant chemicals exert on natural biota. Such effects potentially threaten the existence of all life on Earth. Although I have identified the sixties as the era when ecotoxicology was first conceived as a coherent subject area, it is important to acknowledge that studies that would now be regarded as ecotoxicological are much older. Wherever people's ingenuity has led them to change the face of nature significantly, it has not escaped them that a number of biological con sequences, often unfavourable, ensue.
Download or read book Science and Conservation of Vernal Pools in Northeastern North America written by Aram J. K. Calhoun and published by CRC Press. This book was released on 2007-08-13 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt: Synthesizes Decades of Research on Vernal Pools Science Pulling together information from a broad array of sources, Science and Conservation of Vernal Pools in Northeastern North America is a guide to the issues and solutions surrounding seasonal pools. Drawing on 15 years of experience, the editors have mined published literature,
Download or read book OECD Guidelines for the Testing of Chemicals Section 2 Test No 231 Amphibian Metamorphosis Assay written by OECD and published by OECD Publishing. This book was released on 2009-09-08 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Test Guideline describes an amphibian metamorphosis assay intended to screen substances which may interfere with the normal functioning of the hypothalamo-pituitary-thyroid axis. The assay was validated with the species Xenopus laevis, which is ...
Download or read book Tribal Decision maker s Guide to Solid Waste Management written by and published by . This book was released on 2003 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book EPA 560 11 written by and published by . This book was released on 1980-07 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mountaintop Mining valley Fills in Appalachia written by and published by . This book was released on 2003 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ecotoxicology of Amphibians and Reptiles written by Donald W. Sparling and published by CRC Press. This book was released on 2010-06-02 with total page 946 pages. Available in PDF, EPUB and Kindle. Book excerpt: Building on the success of its popular predecessor, the second edition of Ecotoxicology of Amphibians and Reptiles presents newly available findings on the species that are important environmental indicators. This new edition covers nearly twice as many topics as the first, including recent developments in the ecotoxicology of amphibians and reptil
Download or read book Energy Research Abstracts written by and published by . This book was released on 1982 with total page 1288 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Atrazine in North American Surface Waters written by Jeffrey M. Giddings and published by SETAC. This book was released on 2005 with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Amphibians and Reptiles written by Tom Langton and published by Council of Europe. This book was released on 1997-01-01 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book UV Effects in Aquatic Organisms and Ecosystems written by E Walter Helbling and published by Royal Society of Chemistry. This book was released on 2007-10-31 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers extensive coverage of the most important aspects of UVR effects on all aquatic (not just freshwater and marine) ecosystems, encompassing UV physics, chemistry, biology and ecology. Comprehensive and up-to-date, UV Effects in Aquatic Organisms and Ecosystems aims to bridge the gap between environmental studies of UVR effects and the broader, traditional fields of ecology, oceanography and limnology. Adopting a synthetic approach, the different sections cover: the physical factors controlling UVR intensity in the atmosphere; the penetration and distribution of solar radiation in natural waters; the main photochemical process affecting natural and anthropogenic substances; and direct and indirect effects on organisms (from viruses, bacteria and algae to invertebrate and vertebrate consumers). Researchers and professionals in environmental chemistry, photochemistry, photobiology and cell and molecular biology will value this book, as will those looking at ozone depletion and global change.
Download or read book Acid Precipitation written by and published by . This book was released on 1983 with total page 740 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Natural History of Amphibians written by Robert C. Stebbins and published by Princeton University Press. This book was released on 1997-01-26 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: Amphibia, the animal group that includes frogs, toads, salamanders, and caecilians, contains more than 4,500 known living species and new ones are being discovered continuously. This book focuses on the natural history of amphibians worldwide, how interaction with their environment over time has affected their evolutionary processes and what factors will determine their destinies. 37 photos. 52 line illus.
Download or read book Ecosystems Evolution and Ultraviolet Radiation written by Charles Cockell and published by Springer Science & Business Media. This book was released on 2001-05-25 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: From microbial to plant ecosystems, this book examines how changes in UV radiation, caused by anthropogenic ozone depletion, as well as changes in radiation levels throughout the evolution of life on Earth, can alter species composition and interspecies competitiveness. It focuses on the evolutionary aspects of the effects of UV as well as the various synergistic interactions of UV radiation with other environmental factors. Because our knowledge of UV effects on whole ecosystems is still at a relatively early stage, an important part of each chapter is an overview of future research directions and indications of where new date and knowledge is needed.
Download or read book Developmental Biology written by Mary S. Tyler and published by Sinauer Associates, Incorporated. This book was released on 1994 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Threatened Amphibians of the World written by S. N. Stuart and published by . This book was released on 2008 with total page 784 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Amphibians are facing an extinction crisis, but getting to the facts has been difficult. "Threatened Amphibians of the World" is a visual journey through the first-ever comprehensive assessment of the conservation status of the world's 6,000 known species of frogs, toads, salamanders, and caecilians. All 1,900 species known to be threatened with extinction are covered, including a description of threats to each species and an evaluation of conservation measures in place or needed. Each entry includes a photograph or illustration of the species where available, a distribution map, and detailed information on range, population and habitat and ecology. Introductory chapters present a detailed analysis of the results, complemented by a series of short essays written by many of the world's leading herpetologists. Appendices include annoted lists of lower risk species and a country-by-country listing of threatened amphibians."--pub. desc.
