Light and Photosynthesis in Aquatic Ecosystems

Author: John T. O. Kirk
Publisher: Cambridge University Press
ISBN: 1139493914
Format: PDF, Kindle
Download Now
Beginning systematically with the fundamentals, the fully-updated third edition of this popular graduate textbook provides an understanding of all the essential elements of marine optics. It explains the key role of light as a major factor in determining the operation and biological composition of aquatic ecosystems, and its scope ranges from the physics of light transmission within water, through the biochemistry and physiology of aquatic photosynthesis, to the ecological relationships that depend on the underwater light climate. This book also provides a valuable introduction to the remote sensing of the ocean from space, which is now recognized to be of great environmental significance due to its direct relevance to global warming. An important resource for graduate courses on marine optics, aquatic photosynthesis, or ocean remote sensing; and for aquatic scientists, both oceanographers and limnologists.

Luftverschmutzung und Klima nderung

Author: Alan R. Wellburn
Publisher: Springer-Verlag
ISBN: 3642590373
Format: PDF, ePub, Mobi
Download Now
Hier liegt das erste zusammenfassende Buch zu den Auswirkungen von Luftverschmutzung und Klimaänderung auf die Biosphäre vor. Der Schwerpunkt liegt dabei auf der Erläuterung der biochemischen Vorgänge in Pflanze, Tier und Mensch, die durch die jeweiligen Luftschadstoffe ausgelöst werden. Daneben werden aber auch globale Aspekte der Luftverschmutzung wie Treibhauseffekt, saurer Regen, Ozonloch und Waldsterben ausführlich erörtert. Somit erhält der Leser einen umfassenden Einblick in diese fachübergreifende Problematik.

Utopien Realpolitik und Politische Bildung

Author: Reinhard Engelland
Publisher: Springer-Verlag
ISBN: 3663012824
Format: PDF, Kindle
Download Now
Ohne hier ein Katastrophenszenario malen zu wollen, ist festzustellen, daß die aktuell vorhandenen und kurzfristig einer politischen Lösung harrenden Probleme so drängend sind, daß der Blick in die Zukunft kaum noch gewagt wird. Folglich nimmt sowohl wegen des aktuell steigenden Problemdrucks als auch vor dem Hintergrund bislang ausgebliebener zukunftsweisender Antworten auf die politischen Herausforderungen am Ende des 20. Jahrhun derts auch bei uns das Unbehagen an der etablierten Politik stetig zu. Hier lauern Gefahren für unsere Demokratie. Deshalb heißt das Motto dieses Bu ches, und so könnte auch der Titel lauten: "Auf der Suche nach der Zukunfts fähigkeit". Diese Suche führt in diesem Sammelband unter den Gesichtspunkten der Politischen Bildung und thematisch bezogen auf die sozialen und ökologi schen Herausforderungen Aussagen aus den Sozialwissenschaften und der praktischen Politik zusammen. Damit verbunden ist die Hoffnung, Anstöße zu geben - zum Nachdenken und zum Vordenken. Aber warum dann doch, so könnten die Leser und die Leserinnen' fra gen, der gewählte Buchtitel? Hätte es nicht anstelle des diskreditiert erschei nenden Begriffes "Utopien" besser "Visionen" geheißen? Und wird nicht der Begriff "Realpolitik" seit seiner Prägung im 19. Jahrhundert auch pejorativ verwendet? Schließlich zur "Politischen Bildung": Sie ist, wie der Untertitel zeigt, der Bezugspunkt dieser Publikation.

Oceans and Aquatic Ecosystems Volume I

Author: Eric Wolanski
Publisher: EOLSS Publications
ISBN: 1905839057
Format: PDF, Mobi
Download Now
Oceans and Aquatic Ecosystems theme is a component of Encyclopedia of Natural Resources Policy and Management, in the global Encyclopedia of Life Support Systems (EOLSS), which is an integrated compendium of twenty one Encyclopedias. The theme guides the reader through various pathways followed by surface water on earth. It describes the dominant processes that govern how organisms interact with water and with each other, and how they in turn can modify water properties. This knowledge is important for humanity. Indeed, only by understanding our actions impacts upon water, and the animals and plants living in it, can we learn to exploit water, marine and fresh-water habitats and the living organisms, without destroying the resources on which our livelihood and very survival depend. The Theme on Oceans and Aquatic Ecosystems discusses matters of great relevance to our world such as: Freshwater Wetland Resources and Biology; Problems, Restoration and Conservation of Lakes and Rivers; Coastal Regions; The Oceans and Seas; Oceanic Islands These two volumes are aimed at the following five major target audiences: University and College students Educators, Professional practitioners, Research personnel and Policy analysts, managers, and decision makers and NGOs.

Photostasis and Related Phenomena

Author: Theodore P. Williams
Publisher: Springer Science & Business Media
ISBN: 1489915494
Format: PDF, ePub, Mobi
Download Now
Over the weekend of 21-23 February 1997, a small group gathered in Tallahassee, Florida, at the invitation of Ted Williams, to discuss "photo stasis and related topics." The majority of participants were former students and colleagues of Ted's, but an occasional outsider such as myself was generously included. The papers presented there are collected in this volume. The theory of photo stasis was first outlined in a landmark paper by John Penn and Ted, published in 1986 in Experimental Eye Research. They provided compelling data showing that, in the albino rat eye, levels of rhodopsin, outer-segment length, rhodopsin regeneration rate, and even, perhaps, rhodopsin packing density all depend on the levels of cyclic illumination (12 hours light, 12 hours dark) in which the animal was reared. So, for example, there is fourfold less rhodopsin in a retinal extract derived from an animal reared at 400 lux than in an extract from the retina of an animal reared at 3 lux. Animals reared at intermediate levels of light show intermediate amounts of rhodopsin that are correlated with illumination level. What these data immediately suggested is that the photoreceptor cell can adjust its photon-catching ability in response to the levels of light in which an animal is reared, and they also provided a compelling rationale for outer-segment turnover, a phenomenon discovered 20 years earlier by Richard Young but whose function has remained obscure.

Elements of Ecology

Author: CTI Reviews
Publisher: Cram101 Textbook Reviews
ISBN: 1478435429
Format: PDF, Mobi
Download Now
Facts101 is your complete guide to Elements of Ecology. In this book, you will learn topics such as as those in your book plus much more. With key features such as key terms, people and places, Facts101 gives you all the information you need to prepare for your next exam. Our practice tests are specific to the textbook and we have designed tools to make the most of your limited study time.

Development of Marine Resources

Author: Patrick Prouzet
Publisher: John Wiley & Sons
ISBN: 111900778X
Format: PDF, ePub
Download Now
Marine resources and their exploitation, recovery and economic networks they generate are here from the perspective now inevitable growing environmental constraints, policy management and technical innovation. A historical perspective shows that Ocean and its adjacent seas at all times, allowed coastal communities to adapt to a very volatile environment through many technological changes. The recent development of marine biotechnology , the discovery of a great pharmacopoeia especially in reef environments , the development of marine renewables , are examples which show that man can develop through these new technologies property and services of the ocean. But this development resources under pressure of global change requires not only taking into account technical, but also social and political. This is the price that the analysis of maritime activities will assess the sustainability and development of various economic sectors and coastal populations, faced with the objectives of a "blue growth" associated with a return to the "good state "of the marine environment

Aquatic Entomology

Author: Jill Lancaster
Publisher: OUP Oxford
ISBN: 0191669881
Format: PDF, ePub
Download Now
Aquatic insects are the dominant invertebrate fauna in most freshwater ecosystems, and figure prominently in the work of a diverse range of researchers, students, and environmental managers. Often employed as indicators of ecosystem health, aquatic insects are also commonly used as model systems to test hypotheses in ecological topics including metapopulation and metacommunity dynamics, recruitment limitation, trophic interactions, and trophic networks. Due to their complex life cycles, aquatic insects must master both terrestrial and aquatic environments, crossing these ecosystem boundaries during different stages of development and reproduction. In this wide-ranging text, life under and on top of the water surface are covered in unusual detail, including the biomechanics of life in water, locomotion underwater and on surface films, gas exchange, physico-chemical stressors, feeding, sensory perception and communication, reproduction, egg-laying and development, and the evolution of aquatic habits. The threatened status of freshwaters around the world, coupled with an expanding population of researchers and managers charged with their well-being, signals the importance of such a book as many individuals seek to understand how insects function in these often challenging physical environments. Interest in freshwaters may never have been higher with ever-increasing conflict between water allocation for human (agricultural) use and conservation. Aquatic Entomology is suitable for graduate students, researchers, and managers interested in the subject from a perspective of either basic or applied ecology. It will also be a valuable supplementary text for courses in limnology or freshwater ecology, entomology, and water resource management.

Ecology of Fresh Waters

Author: Brian R. Moss
Publisher: John Wiley & Sons
ISBN: 1118687795
Format: PDF
Download Now
This new edition of an established textbook provides a comprehensive and stimulating introduction to rivers, lakes and wetlands, and was written as the basis for a complete course on freshwater ecology. Designed for undergraduate and early postgraduate students who wish to gain an overall view of this vast subject area, this accessible guide to freshwater ecosystems and man's activities will also be invaluable to anyone interested in the integrated management of freshwaters. The author maintains the tradition of clarity and conciseness set by previous editions, and the text is extensively illustrated with photographs and diagrams. Examples are drawn from the author's experience in many parts of the world, and the author continues to stress the human influence. The scientific content of the text has been fully revised and updated, making use of the wealth of data available since publication of the last edition. Professor Brian Moss is a lecturer in Applied Ecology at the University of Liverpool, and has written three previous editions of this well-established textbook.