Download or read book Primary Productivity in the Sea written by Paul Falkowski and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 530 pages. Available in PDF, EPUB and Kindle. Book excerpt: Primary productivity in the sea accounts for ~30% of the total global annual production. Holistic understanding of the factors determining marine productivity requires detailed knowl edge of algal physiology and of hydrodynamics. Traditionally studies of aquatic primary productivity have heen conducted hy workers in two major schools: experimental laboratory biology, and empirical field ecology. Here an attempt was made .to hring together people from both schools to share information and con cepts; each author was charged with reviewing his field of exoer tise. The scope of the Symposium is broad, which we feel is its strength. We gratefully acknowledge financial support from the Depart ment of Energy, the United States Environmental Protection Agency, the National Oceanic and Atmospheric Administration, including the NMFS Northeast Fisheries Center and the MESA New York Bight Project. Thanks are due to Mrs. Margaret Dienes, with out whose editorial skills this volume could not have been pro duced, and to Mrs. Helen Kondratuk as Symposium Coordinator. Finally, we wish to record our indebtedness to Dr. Alexander Hollaender for his tireless efforts and valuable advice in sup porting all aspects of this Symposium.
Download or read book Aquatic Productivity written by W. D. Russell-Hunter and published by Macmillan College. This book was released on 1970 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book relates some fundamental aspects of biological oceanography and freshwater biology to global aspects of the future protein nutrition of man and to our understanding of the processes of evolution. Seasonal and other factors controlling organic productivity in temperate oceans are outlined, and more unusual trophic features are considered. Methods for future exploitation of the oceans--particularly through sea-farming--are discussed and critically assessed. The finite nature of the oceans' resources is stressed. Energetics of food chains, the dynamics of exploited fish stocks, and the biogeochemistry of organic cycles are clearly explained and examined.--
Download or read book Primary Productivity of the Biosphere written by H. Lieth and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 339 pages. Available in PDF, EPUB and Kindle. Book excerpt: The period since World War II, and especially the last decade influenced by the International Biological Program, has seen enormous growth in research on the function of ecosystems. The same period has seen an exponential' rise in environmental problems including the capacity of the Earth to support man's population. The concern extends to man's effects on the "biosphere"-the film of living organisms on the Earth's surface that supports man. The common theme of ecologic research and environmental concerns is primary production the binding of sunlight energy into organic matter by plants that supports all life. Many results from the IBP remain to be synthesized, but enough data are available from that program and other research to develop a convincing sum mary of the primary production of the biosphere-the purpose of this book. The book had its origin in the parallel interests of the two editors and Gene E. Likens, which led them to prepare a symposium on the topic at the Second Biological Congress of the American Institute of Biological Sciences in Miami, Florida, October 24, 1971. Revisions of the papers presented at that symposium appear as Chapters 2, 8, 9, 10, and 15 in this book. We have added other chapters that complement this core; these include discussion and evaluation of methods for measuring productivity and regional production, current findings on tropical productivity, and models of primary productivity.
Download or read book Water Resources Research Catalog written by and published by . This book was released on 1966 with total page 1464 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fundamentals of Aquatic Ecology written by R. S. K. Barnes and published by John Wiley & Sons. This book was released on 2009-07-21 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fundamentals of Aquatic Ecology is a completely updated and revised edition of the earlier work, Fundamentals of Aquatic Ecosystems. The new edition has been re-titled to reflect the fact that the authors found that, from the modification exercise, a completely different and new book emerged. The new edition concentrates heavily of the fundamental features common to all aquatic systems, both marine and freshwater. This unique synthesis allows for the discussion of ecological processes comparatively, across environments. A general introduction is followed by discussion of various 'types' of aquatic ecosystems - open waters, coastal zones, benthos, and the aquatic ecosystem as a whole. This is followed by an important new chapter on aquatic ecosystems and global ecology. Later chapters consider the individuals and communities in aquatic ecosystems. A totally re-written and rejuvenated edition of an established student text. Synthesizes both marine and freshwater ecology. Covers both ecosystem ecology and population biology. In depth consideration of man's impact on the aquatic environment.
Download or read book Restoration of productive aquatic ecosystems by small scale fisheries and aquaculture communities in Asia written by Gardiner, N.M. and published by Food & Agriculture Org.. This book was released on 2022-04-06 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report showcases examples of actions taken by small-scale fishers and aquaculture farmers in Asia to restore the productivity of aquatic ecosystems. Small-scale fishers and fish farmers include some of the world’s most marginalized and impoverished people groups, yet their harvests account for over half of the world’s aquatic food production. The marine, coastal and freshwater ecosystems their livelihoods depend upon are degraded from human impacts and further at risk from climate change. Ecosystem restoration actions by fisherfolk communities can revitalize the socio-ecological services and sustain progress over time. Both passive and active restoration approaches are being employed across Asia’s marine, coastal and inland waterways. Fishers, fish farmers, and fishworkers’ restorative actions are focused on increasing the sustainability of their operations. Common approaches include eliminating destructive fishing, reducing overfishing through gear changes and effort control, restoring connectivity of floodplains and fish migration pathways, integrated aquaculture and rice-farming practices, re-stocking of native fisheries, and actively rehabilitating and / or re-establishing habitats. Progress is measurable through a diverse array of environmental, socio-economic and governance related metrics. Changes in fisheries catches, ecological connectivity, water quality, habitat diversity and structure, and fish consumption provide important measures of biodiversity gains (or losses). Common enablers of success include economic incentives, co-management and legal recognition of fishing rights, highly engaged fisherfolk cooperatives or community groups, women’s leadership and development, and community partnerships with stakeholders that focus on enabling fisherfolk’s own goals for sustainable livelihoods. Ecosystem restoration activities have not lasted when these enablers are insufficiently attended to and when environmental aspects of project feasibility, such as the choice of rehabilitation locations and / or species, are poorly planned. Successes in ecosystem restoration by fisherfolk can and are being scaled out to neighbouring communities and countries. Key to this is the sharing of stories, lessons learned and tools through south-south partnerships, learning exchanges, and women’s groups. Simple, low-cost tools and actions have enabled long-term engagement by small-scale fishers in sustainable operations. More complex actions, such as the uptake of integrated aquaculture systems, are also enabling stepwise changes in ecosystem restoration. By sharing stories from different ecosystems, fisheries, and geographies, this report seeks to help fisherfolk and their partners glean from one another and achieve faster progress in ecosystem restoration.
Download or read book Periphyton written by M. E. Azim and published by CABI. This book was released on 2005-11-18 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first comprehensive monograph on periphyton, this book contains contributions by scientists fromaround the globe. Multi-disciplinary in nature, it covers both basic and applied aspects of periphyton,and is applicable worldwide in natural, extensive and intensive managed systems.Periphyton, as described in this book, refers to the entire complex of attached aquatic biota on submergedsubstrates, including associated non-attached organisms and detritus. Thus the periphyton communitycomprises bacteria, fungi, protozoa, algae, zooplankton and other invertebrates. Periphyton is importantfor various reasons: as a major contributor to carbon fixation and nutrient cycling in aquatic ecosystems;as an important source of food in aquatic systems; as an indicator of environmental change. It can alsobe managed to improve water quality in lakes and reservoirs; it can greatly increase aquaculture production;it can be used in waste water treatment.The book provides an international review of periphyton ecology, exploitation and management. Theecology part focuses on periphyton structure and function in natural systems. The exploitation part coversits nutritive qualities and utilization by organisms, particularly in aquaculture. The final part considersthe use of periphyton for increasing aquatic production and its effects on water quality and animal healthin culture systems. This book will help scientists and entrepreneurs further understand the ecology andproduction of aquatic systems and venture into new and promising areas.
Download or read book Accounting for livestock water productivity How and why written by Drastig, K., Vellenga, L., Qualitz, G., Singh, R., Pfister, S., Boulay, A.-M., Wiedemann, S., Prochnow, A., Chapagain, A., De Camillis, C., Opio, C. & Mottet, A. and published by Food & Agriculture Org.. This book was released on 2021-01-22 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: The assessment of water productivity in livestock supply chains has a critical role to play in developing productive and sustainable food production systems worldwide. In particular, the evaluation of water productivity improvement options is key to addressing growing food demand and the projected impacts of climate change under conditions where the availability of land and water resources is increasingly limited. In this report, we review current applications of water productivity analysis in livestock supply chains. To do so, we analysed 50 livestock water productivity studies carried out in various regions of the world from 1993 to the present time. We reviewed the assessment goals, system boundaries, methodological approaches, water flows, modelling tools, databases, livestock species and the main findings in each of the studies. We found that there was no consistency in the methods and approaches used to assess water productivity in livestock production chains. The studies varied widely in terms of their assessment goals, methodology, and the sources of water used for the analysis. The main methodological differences were the inclusion or exclusion of background processes, such as water input and the treatment of precipitation in accounting for water use in livestock production processes. Another key issue was the missing uncertainty assessment, which can be classified as input data uncertainty or model uncertainty, as well as choice uncertainties. The review recommends the further development of guidelines that ensure a consistent and coordinated application of water productivity analysis of livestock production systems world-wide.
Download or read book Aquatic Ecosystems Interactivity of Dissolved Organic Matter written by Stuart Findlay and published by Academic Press. This book was released on 2003 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt: Overviews of the source, supply and variability of DOM, surveys of the processes that mediate inputs to microbial food webs, and syntheses consolidating research findings provide a comprehensive review of what is known of DOM in freshwater. This book will be important to anyone interested in understanding the fundamental factors associated with DOM that control aquatic ecosystems."--BOOK JACKET.
Download or read book Water Resources Thesaurus written by United States. Office of Water Research and Technology and published by . This book was released on 1981 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Water written by Unesco and published by UN-HABITAT. This book was released on 2006 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt: This illustrated report sets out a global review of the state of the world's freshwater resources, based on the collective work of 24 United Nations agencies, following on from the conclusions of the first UN World Water Development Report 'Water for People, Water for Life' published in 2003 (ISBN 9231038818). This second edition discusses progress towards the water-related targets of the UN Millennium Development Goals and examines a range of key issues including population growth and increasing urbanisation, changing ecosystems, food production, health, industry and energy, as well as risk management, valuing and paying for water and increasing knowledge and capacity. It contains 16 case studies which consider key challenges in water resource management and makes a number of recommendations to guide future action and encourage sustainable use, productivity and management of our increasingly scarce freshwater resources.
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1991 with total page 962 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Abstracts US IBP Ecosystem Analysis Studies written by International Biological Programme and published by . This book was released on 1972 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Methods for Collection and Analysis of Aquatic Biological and Microbiological Samples written by and published by . This book was released on 1989 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Water for Food Security Nutrition and Social Justice written by Lyla Mehta and published by Routledge. This book was released on 2019-09-19 with total page 233 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the first comprehensive effort to bring together Water, Food Security and Nutrition (FSN) in a way that goes beyond the traditional focus on irrigated agriculture. Apart from looking at the role of water and sanitation for human well-being, it proposes alternative and more locally appropriate ways to address complex water management and governance challenges from the local to global levels against a backdrop of growing uncertainties. The authors challenge mainstream supply-oriented and neo-Malthusian visions that argue for the need to increase the land area under irrigation in order to feed the world’s growing population. Instead, they argue for a reframing of the debate concerning production processes, waste, food consumption and dietary patterns whilst proposing alternative strategies to improve water and land productivity, putting the interests of marginalized and disenfranchized groups upfront. The book highlights how accessing water for FSN can be challenging for small-holders, vulnerable and marginalized women and men, and how water allocation systems and reform processes can negatively affect local people’s informal rights. The book argues for the need to improve policy coherence across water, land and food and is original in making a case for strengthening the relationship between the human rights to water and food, especially for marginalized women and men. It will be of great interest to practitioners, students and researchers working on water and food issues.
Download or read book Abstracts US International Biological Program Ecosystem Analysis Studies written by International Biological Programme and published by . This book was released on 1974 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Water for Food Water for Life written by David Molden and published by Routledge. This book was released on 2013-07-23 with total page 930 pages. Available in PDF, EPUB and Kindle. Book excerpt: Managing water resources is one of the most pressing challenges of our times - fundamental to how we feed 2 billion more people in coming decades, eliminate poverty, and reverse ecosystem degradation. This Comprehensive Assessment of Water Management in Agriculture, involving more than 700 leading specialists, evaluates current thinking on water and its interplay with agriculture to help chart the way forward. It offers actions for water management and water policy - to ensure more equitable and effective use. This assessment describes key water-food-environment trends that influence our lives today and uses scenarios to explore the consequences of a range of potential investments. It aims to inform investors and policymakers about water and food choices in light of such crucial influences as poverty, ecosystems, governance, and productivity. It covers rainfed agriculture, irrigation, groundwater, marginal-quality water, fisheries, livestock, rice, land, and river basins. Ample tables, graphs, and references make this an invaluable work for practitioners, academics, researchers, and policymakers in water management, agriculture, conservation, and development. Published with IWMI.
