Download or read book EFFECTS OF DREISSENID MUSSEL DRUSES ON HEAVY METALS TRANSFER VIA BENTHIC MACROINVERTEBRATES written by Emily K. Freeman and published by . This book was released on 2013 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt: Invasive dreissenid mussels (zebra, Dreissena polymorpha and quagga, Dreissena bugensis), first identified in the western basin of Lake Erie in the late 1980s, have become a dominant factor in the structure of the Lake Erie food web and have the potential to cycle heavy metals to higher trophic levels through multiple pathways. The objectives of this study were to better understand the affect of dreissenid biodeposits on other benthic invertebrates through potential bioconcentration of heavy metals, and the subsequent bioaccumulation in amphipods (Gammarus). Laboratory experiments were designed to replicate natural conditions, allowing Dreissena to filter lake water and deposit feces and pseudofeces naturally within the druse structure, while natural sedimentation took place outside the druse. Sediment metal concentrations (Cd, Cr, Cu, Ni, Pb and Zn) exceeded US EPA Threshold Effect Levels (TEL) from both control and treatment traps (field experiment). Lake water concentrations of dissolved and particulate Cd, Cr, Cu and Ni (laboratory experiment) were found to be below levels determined to cause toxicity by the EPA. However, filtering by live dreissenid mussels resulted in elevated concentrations of heavy metals in sediments produced from feces and pseudofeces. Cadmium and chromium sediment concentrations in treatments (live mussels) were significantly higher than those in controls (dead mussels) (F1 = 13.5418, P = 0.0005 and F1 = 23.4032, P =

Download or read book Using Caged Zebra Mussels Dreissena Polymorpha for the Assessment of Ecological Effects of Metal Pollution written by Melvice Epede and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ecological Effects of Water level Fluctuations in Lakes written by Karl M. Wantzen and published by Springer Science & Business Media. This book was released on 2009-05-06 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most aquatic ecosystems have variable water levels. These water-level fluctuations (WLF) have multiple effects on the organisms above and below the waterline. Natural WLF patterns in lakes guarantee both productivity and biodiversity, while untimely floods and droughts may have negative effects. Human impacts on WLF have led to a stabilization of the water levels of many lakes by hydraulic regulation, untimely drawdown due to water use, or floods due to water release from hydropower plants in the catchments. This book provides a first review in this field. It presents selected papers on the ecological effects of WLF in lakes, resulting from a workshop at the University of Konstanz in winter 2005. Issues addressed here include the extent of WLF, and analyses of their effects on different groups of biota from microorganisms to vertebrates. Applied issues include recommendations for the hydrological management of regulated lakes to reduce negative impacts, and a conceptual framework is delivered by an extension of the floodpulse concept for lakes. Current impacts on water use, including increasing demands on drinking and irrigation water, hydropower etc., and climate change effects on WLF make this book an essential resource for aquatic ecologists, engineers, and decision-makers dealing with the management of lake ecosystems and their catchments.

Download or read book Quagga and Zebra Mussels written by Thomas F. Nalepa and published by CRC Press. This book was released on 2013-10-25 with total page 820 pages. Available in PDF, EPUB and Kindle. Book excerpt: The introduction and rapid spread of two Eurasian mussel species, Dreissena polymorpha (zebra mussel) and Dreissena rostriformis bugensis (quagga mussel), in waters of North America has caused great concern among industrial and recreational water users. These invasive species can create substantial problems for raw water users such as water treatment facilities and power plants, and they can have other negative impacts by altering aquatic environments. In the 20 years since the first edition of this book was published, zebra mussels have continued to spread, and quagga mussels have become the greater threat in the Great Lakes, in deep regions of large lakes, and in the southwestern Unites States. Quagga mussels have also expanded greatly in eastern and western Europe since the first book edition was published. Quagga and Zebra Mussels: Biology, Impacts, and Control, Second Edition provides a broad view of the zebra/quagga mussel issue, offering a historic perspective and up-to-date information on mussel research. Comprising 48 chapters, this second edition includes reviews of mussel morphology, physiology, and behavior. It details mussel distribution and spread in Europe and across North America, and examines policy and regulatory responses, management strategies, and mitigation efforts. In addition, this book provides extensive coverage of the impact of invasive mussel species on freshwater ecosystems, including effects on water clarity, phytoplankton, water quality, food web changes, and consequences to other aquatic fauna. It also reviews and offers new insights on how zebra and quagga mussels respond and adapt to varying environmental conditions. This new edition includes seven video clips that complement chapter text and, through visual documentation, provide a greater understanding of mussel behavior and distribution.

Download or read book Biology and Management of Invasive Quagga and Zebra Mussels in the Western United States written by Wai Hing Wong and published by CRC Press. This book was released on 2015-05-07 with total page 559 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biology and Management of Invasive Quagga and Zebra Mussels in the Western United States is a synthesis of the biology and management of invasive mussels from scientists and managers working on invasive quagga and zebra mussels in the western United States. Invasive dreissenid mussels have spread throughout southwestern United States at unprecedent

Download or read book The status and distribution of freshwater biodiversity in the eastern Mediterranean written by Kevin G. Smith and published by IUCN. This book was released on 2014-01-01 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Eastern Mediterranean region supports just over 4.4% of the global human population yet contains only 1.1% of its renewable water resources, which are under constant threat from the impacts of unsustainable water withdrawal, dam development and climate change. This IUCN report and accompanying dataset represents a major advance in the provision of information to help incorporate biodiversity needs into water development planning processes within an Integrated River Basin Management framework. This volume includes species information compiled for each river and lake sub-basin and incorporates information from the assessment conducted by IUCN's Global Species Programme, in collaboration with its partners, of the status and distribution of all described species of freshwater fishes, molluscs, odonates, and plants from across the Eastern Mediterranean with existing information for species of freshwater dependent amphibians, birds, crustaceans, and mammals. This work represents the most comprehensive assessment yet of freshwater biodiversity at the species level for this part of the world.

Download or read book Fluoride in Drinking water written by John Kirtley Fawell and published by World Health Organization. This book was released on 2006 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluoride is known to occur at elevated concentration in a number of parts of the world, where it can be a significant cause of disease. The primary focus of this book is the prevention of adverse health effects from excessive levels of fluoride in drinking water. The book fills the urgent need, identified for updating the WHO Guidelines for Drinking-water Quality, for information on the occurrence of fluoride, its health effects, ways of reducing excess levels, and methods for analysis of fluoride in water. The draft document, produced by a working group of experts convened to consider protection from fluoride and its control, was issued for extensive review and consultation. The resultant book, which incorporates the comments received, was further peer reviewed by experts in developed and developing countries. It is aimed at a wide range of individuals, including health workers and sanitary engineers who may require a broad introduction to the subject with more detailed guidance in some specific areas. Fluoride in Drinking-waterwill be an invaluable reference source for all those concerned with the management of drinking water containing fluoride and the health effects arising from its consumption, including water sector managers and practitioners, as well as health sector staff at policy and implementation levels. It will also be of interest to researchers, students, development workers, and consultants.

Download or read book Wildlife Diseases written by Leslie Page and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 651 pages. Available in PDF, EPUB and Kindle. Book excerpt: The broad spectrum of topics covered in the nine symposia and four open-paper sessions of the Third Inter national Wildlife Disease Conference comprise a remarkable collection of ideas and current research information on diseases of wildlife. The term "wildlife" is broad in itself and is interpreted by the Conference sponsor, The Wildlife Disease Association, to mean all free-living vertebrate and invertebrate members of the animal kingdom. The Conference's invitational symposia brought to Munich an array of wildlife specialists from around the world who addressed major problems affecting the under standing and control of diseases of wildlife. The open paper sessions attracted many well-known scientists with detailed data from their specialized studies. Over 100 participants were present to hear 84 scientific papers. The Wildlife Disease Association and the Conference editors, through their publisher, are pleased to offer this compilation of presentations as a Conference Pro ceedings. This volume will be an important data source for the study of diseases of wildlife by students, specialists, and general biologists everywhere. WDA President W. G. Winkler expresses the Associa tion's gratitude to the Conference Chairman, Prof. Dr. H.

Download or read book The Zebra Mussel Dreissena Polymorpha written by Dietrich Neumann and published by . This book was released on 1992 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Large Lakes written by Max M. Tilzer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 699 pages. Available in PDF, EPUB and Kindle. Book excerpt: The vast majority of the world's lakes are small in size and short lived in geological terms. Only 253 of the thousands of lakes on this planet have surface areas larger than 500 square kilometers. At first sight, this statistic would seem to indicate that large lakes are relatively unimportant on a global scale; in fact, however, large lakes contain the bulk of the liquid surface freshwater of the earth. Just Lake Baikal and the Laurentian Great Lakes alone contain more than 38% of the world's total liquid freshwater. Thus, the large lakes of the world accentuate an important feature of the earth's freshwater reserves-its extremely irregular distribution. The energy crisis of the 1970s and 1980s made us aware of the fact that we live on a spaceship with finite, that is, exhaustible resources. On the other hand, the energy crisis led to an overemphasis on all the issues concerning energy supply and all the problems connected with producing new energy. The energy crisis also led us to ignore strong evidence suggesting that water of appropriate quality to be used as a resouce will be used up more quickly than energy will. Although in principle water is a "renewable resource," the world's water reserves are diminishing in two fashions, the effects of which are multiplicative: enhanced consumption and accelerated degradation of quality.

Download or read book Atlas of the Spawning and Nursery Areas of Great Lakes Fishes Spawning and nursery areas of Great Lakes fishes a summary by geographic area written by U.S. Fish and Wildlife Service. Office of Biological Services and published by . This book was released on 1982 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Aquatic Invertebrates written by and published by . This book was released on 1987 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Antifascisms written by David Ward and published by Fairleigh Dickinson Univ Press. This book was released on 1996 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an in-depth analysis of three of the most crucial years in twentieth-century Italian history, the years 1943-46. After more than two decades of a Fascist regime and a disastrous war experience during which Italy changed sides, these years saw the laying of the political and cultural foundations for what has since become known as Italy's First Republic. Drawing on texts from the literature, film, journalism, and political debate of the period, Antifascisms offers a thorough survey of the personalities and positions that informed the decisions taken in this crucial phase of modern Italian history.

Download or read book State of Lake Michigan written by T. Edsall and published by Aquatic Ecosystem Health & Mgmt Soc. This book was released on 2005 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume, cataloging and analyzing the current science on the state of Lake Michigan, is an important part of Great Lakes recovering science. It carries forward the singular contribution that the binational Great Lakes scientific community has made not only to restoring the Great Lakes but also to the world's body of knowledge about large lake ecology, the long-range transport of pollutants, and the importance of habitat in ensuring ecosystem health.

Download or read book The 100th Meridian Initiative written by U. S. Fish U.S. Fish and Wildlife Service and published by CreateSpace. This book was released on 2015-02-13 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Zebra mussels are prolific alien invaders that have rapidly becomeestablished in waters of the eastern United States and Canada. Thesenatives of the Black, Caspian, Azov and Aral Sea drainage basins were firstdiscovered in Lake St. Clair near Detroit, Michigan, in 1988. By 1991, theyhad spread throughout the Great Lakes basin and are now establishedthroughout the Mississippi River basin and are spreading west intoOklahoma. Except for Oklahoma, zebra mussels have not been detected inopen waters of the West. However, without effective prevention measures, their invasion into the West is a real and imminent possibility

Download or read book Hansenula Polymorpha written by Gerd Gellissen and published by Wiley-Blackwell. This book was released on 2002-06-10 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: Methylotrophic yeasts have attracted increasing interest as useful systems for fundamental research and applied purposes. Hansenula polymorpha in particular has become a preferred organism for the production of recombinant proteins on an industrial scale. Product examples range from therapeutics such as hepatitis B vaccines to industrial enzymes like the feed additive phytase. This book is addressed to researchers and scientists working in the field and provides a comprehensive, up-to-date overview of the present status of Hansenula polymorpha research, applications and methods. Aspects of the organism ranging from systematics, genetics, methanol metabolism and peroxisomal function to its use as a technology platform for the production of recombinant proteins are covered. A detailed chapter on laboratory methods is also included.

Download or read book Rogue Heart written by Axie Oh and published by Tu Books. This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Living safe and anonymous after the Battle of Neo Seoul, telepath Ama does not expect to be approached by a resistance group to help expose a government experiment similar to the one she successfully fled. Once she accepts, however, her assignments get more dangerous until she finds herself manipulating the mind of the boy she once loved and was betrayed by, so she can unseat him as commander of the Alliance.