Download or read book Freshwater Animal Diversity Assessment written by E.V. Balian and published by Springer Science & Business Media. This book was released on 2008-04-27 with total page 622 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers a comprehensive study of species- and genus-level diversity and chorology of the global freshwater fauna to date. It gives a state of the art assessment of the diversity and distribution of Metazoa in the continental waters of the world.

Download or read book Freshwater Biodiversity written by Brian Groombridge and published by . This book was released on 1998 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents "Freshwater Biodiversity: A Preliminary Global Assessment," number eight of the World Conservation Monitoring Centre (WCMC) Biodiversity Series. Features information on the biodiversity of inland waters, prepared for the United Nations Environment Programme (UNEP) by the WCMC in Cambridge.

Download or read book Arctic Biodiversity Assessment written by Conservation of Arctic Flora and Fauna and published by . This book was released on 2013 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dictionary Catalog of the National Agricultural Library written by National Agricultural Library (U.S.) and published by . This book was released on 1967 with total page 746 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Aquatic Oligochaeta written by G. Bonomi and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 241 pages. Available in PDF, EPUB and Kindle. Book excerpt: At the First International Symposium on Aquatic Oligochaete Biology in Sidney, B. C. , the suggestion was made to hold the second in Pallanza, on Lake Maggiore, at the C. N. R. -Istituto Italiano di Idrobiologia. At the same time it was decided that there should be a symposium every third year. The organization of the symposium was made considerably easier by the Senior Editor's having been in personal contact with several Russian colleagues (courtesy of a kind invitation from the U. S. S. R. Academy of Sciences), the 'Hamburg Group' and the Junior Editor. Correspondence with various students of Oligochaeta also furnished many useful suggestions. The Second International Symposium on Aquatic Oligochaete Biology was therefore held in Pallanza in late September 1982 and was attended by 53 scientists from 16 countries in Europe, North America, Asia and Australia. No review papers were formally invited as this had already been done at the first symposium: all the papers were accordingly allotted the same time for oral presentation. These proceedings contain all papers Hrabe and Slepukhina, which were given in absentia, as it presented at the symposium, including those by was impossible for the authors to join the group. The main topics were taxonomy and evolution of Oligo chaeta, life-cyle and population studies, the role of Oligo chaeta in assessing water pollution, physiolog ical studies, community and distribution studies. Special taxonomic workshops took place in the evenings.

Download or read book Soil Biology as Related to Land Use Practices written by and published by . This book was released on 1980 with total page 912 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Aquatic Oligochaete Biology VIII written by Pilar Rodriguez and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains 26 contributions dealing with the biology of aquatic oligochaetes and covers a wide range of topics including taxonomy, morphology, ultrastructure, embryology, reproduction, feeding biology, ecotoxicity, community studies, and species distribution. Descriptions of new taxa in tropical areas, including Amazonian forest soils, as well as overviews on the biodiversity of aquatic oligochaetes in Australia and European groundwaters, are presented. New morphological characteristics in both marine and freshwater species are described and interpreted. Laboratory studies contribute to the knowledge of oligochaete feeding biology and reproduction. The use of aquatic oligochaetes in ecological risk assessment is analysed in detail, and standardised experimental designs for studies on bioaccumulation and pollutant transfer by food are included. Finally, a number of papers present the effects of oliogochaetes on the performance of an activated sludge plant, and multivariate approaches to the spatial and/or temporal distribution and composition of oligochaete communities in many different areas of the world, from the scale of a river to the scale of the microhabitat. The broad scope of this volume is a reflection of recent rends, not only in oligochaete research, but also in general applied biological studies.

Download or read book Reproduction and Development in Annelida written by T. J. Pandian and published by CRC Press. This book was released on 2019-01-30 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a concise informative elucidation of all aspects of reproduction and development in annelids covering from arenicola to tubifex. Annelids flourish between 4,900 m depth to 2,000 m altitude; some of them occur in unusual habitats like hydrothermal vents and subterranean aquatic system (stigobionts). A few have no gut and acquire adequate nutrients through osmotrophism and/or engaging symbiotic microbes. In the absence of exoskeleton to escape predation, the 17,000 speciose annelids have explored bewildering modes of reproduction; not surprisingly, 42–47% of them are brooders. With 13,000 species, polychaetes are gonochores but some 207 species of them are hermaphrodites. Clitellates are all hermaphrodites; of them, 76 species are parthenogens, of which 56 are earthworms. Regenerative potency of annelids ranges from an organ to an entire worm from a single ‘seminal’ segment. The head, tail and both together can be regenerated 21, 42 and 20 times, respectively. However, the potency is limited to ~1% of polychaetes and Heterogamatic sex determination is reported to occur only in six polychaete species, although karyotype is known for 83 annelid species. In temperate polychaetes, a dozen neuroendocrines, arising mostly from the ‘brain’ regulates reproductive cycle. A complete chapter devoted to vermiculture, (i) recognizes the fast-growing candidate species, (ii) distinguishes 'layers' from 'brooders', (iii) indicates that the harvest of oligochaetes may reduce the input of nitrogenous fertilizer in the ricefield, and (iv) explores the scope for increasing wealth from waste.

Download or read book Ecology of a Polar Oasis written by Josef Svoboda and published by . This book was released on 1994 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multi-year of studies carried out from 1979 to 1985 in a terrestrial high-Arctic oasis, the vegetated lowland adjacent to Alexandra Fiord on the east coast of central Ellesmere Island, Northwest Territories. Subjects covered include community and production ecology, autoecology and experimental studies and fauna, with appendices of lichens, bryophytes, vascular plants, terrestrial arthropods, birds and mammals.

Download or read book Soil Microbiology Ecology and Biochemistry written by Eldor Paul and published by Academic Press. This book was released on 2014-11-14 with total page 603 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fourth edition of Soil Microbiology, Ecology and Biochemistry updates this widely used reference as the study and understanding of soil biota, their function, and the dynamics of soil organic matter has been revolutionized by molecular and instrumental techniques, and information technology. Knowledge of soil microbiology, ecology and biochemistry is central to our understanding of organisms and their processes and interactions with their environment. In a time of great global change and increased emphasis on biodiversity and food security, soil microbiology and ecology has become an increasingly important topic. Revised by a group of world-renowned authors in many institutions and disciplines, this work relates the breakthroughs in knowledge in this important field to its history as well as future applications. The new edition provides readable, practical, impactful information for its many applied and fundamental disciplines. Professionals turn to this text as a reference for fundamental knowledge in their field or to inform management practices. - New section on "Methods in Studying Soil Organic Matter Formation and Nutrient Dynamics" to balance the two successful chapters on microbial and physiological methodology - Includes expanded information on soil interactions with organisms involved in human and plant disease - Improved readability and integration for an ever-widening audience in his field - Integrated concepts related to soil biota, diversity, and function allow readers in multiple disciplines to understand the complex soil biota and their function

Download or read book Invertebrates as Webmasters in Ecosystems written by David C. Coleman and published by Cabi. This book was released on 2000-01-01 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: Invertebrates are conspicuous, influential components in all of the ecosystems of the world. Assemblages of invertebrates assume an organizing function and hence may be considered as "webmasters" in these ecosystems. This book reviews and assesses our current understanding of invertebrates in terrestrial and terrestrially-dominated (lower-order stream) ecosystems. It emphasizes the centrality of the activity of invertebrates, which influence ecosystem function far out of proportion to their physical mass in a wide range of situations, particularly at the interface between land and air (litter/soil), water and land (sediments) and in tree canopies and root/soil systems.

Download or read book The Chironomidae written by P.D. Armitage and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 579 pages. Available in PDF, EPUB and Kindle. Book excerpt: The dipteran family Chironomidae is the most widely distributed and frequently the most abundant group of insects in freshwater, with rep resentatives in both terrestrial and marine environments. A very wide range of gradients of temperature, pH, oxygen concentration, salinity, current velocity, depth, productivity, altitude and latitude have been exploited, by at least some chironomid species, and in grossly polluted environments chironomids may be the only insects present. The ability to exist in such a wide range of conditions has been achieved largely by behavioural and physiological adaptations with relatively slight morphological changes. It has been estimated that the number of species world-wide may be as high as 15000. This high species diversity has been attributed to the antiquity of the family, relatively low vagility leading to isolation, and evolutionary plasticity. In many aquatic ecosystems the number of chironomid species present may account for at least 50% of the total macroinvertebrate species recorded. This species richness, wide distribution and tolerance to adverse conditions has meant that the group is frequently recorded in ecological studies but taxonomic difficulties have in the past prevented non-specialist identification beyond family or subfamily level. Recent works, including genetic studies, have meant that the family is receiving much more attention globally.

Download or read book Biological Abstracts written by Jacob Richard Schramm and published by . This book was released on 1974 with total page 1108 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Development of the Mesonephras and the M llerian Duct in Amphibia written by Robert William Hall and published by . This book was released on 1904 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Biology of Soil written by Richard Bardgett and published by Oxford University Press. This book was released on 2005-06-02 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil science has undergone a renaissance with increasing awareness of the importance of soil organisms and below-ground biotic interactions as drivers of community and ecosystem properties.

Download or read book A Text book of Invertebrate Morphology written by James Playfair McMurrich and published by . This book was released on 1896 with total page 684 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ecology of Pesticides written by Anthony William Aldridge Brown and published by John Wiley & Sons. This book was released on 1978 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ecology of pesticides; Discovery and mode of action; The use the pesticides; Constraints on the chocice and use of pesticides.