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Heterogeneite Des Peuplements Forestiers Et Production
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Book Synopsis Hétérogénéité des peuplements forestiers et production by : Thomas Bourdier
Download or read book Hétérogénéité des peuplements forestiers et production written by Thomas Bourdier and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: La relation diversité-productivité est au cœur des enjeux actuels dans de nombreux écosystèmes. Dans l'étude de cette relation en peuplements forestiers, un aspect de la diversité a été longtemps négligé : l'hétérogénéité des tailles. Nous nous intéressons à l'effet de l'hétérogénéité des tailles sur la production en peuplements purs et mélangés et à ses interactions avec les traits fonctionnels des espèces. L'utilisation de données de l'inventaire forestier national nous a permis de démontrer un effet globalement négatif de l'hétérogénéité des tailles en peuplements purs de différentes espèces ainsi qu'en peuplements mélangés. Dans ce dernier cas, nous avons mis en évidence un effet positif sur la production de la richesse spécifique et un effet positif d'une diminution de la tolérance à l'ombre avec la taille des arbres c'est à dire lorsque les espèces les moins tolérantes dominent la canopée. Nous discutons les intérêts et limites de de ces résultats et leurs conséquences à plus ou moins long terme pour la stabilité et la résilience des peuplements forestiers.
Book Synopsis Einwirkungen des Menschen auf den Wald by : Helfried Oswald
Download or read book Einwirkungen des Menschen auf den Wald written by Helfried Oswald and published by . This book was released on 1985 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Mediterranean region under climate change by : Collectif
Download or read book The Mediterranean region under climate change written by Collectif and published by IRD Éditions. This book was released on 2018-11-19 with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book has been published by Allenvi (French National Alliance for Environmental Research) to coincide with the 22nd Conference of Parties to the United Nations Framework Convention on Climate Change (COP22) in Marrakesh. It is the outcome of work by academic researchers on both sides of the Mediterranean and provides a remarkable scientific review of the mechanisms of climate change and its impacts on the environment, the economy, health and Mediterranean societies. It will also be valuable in developing responses that draw on “scientific evidence” to address the issues of adaptation, resource conservation, solutions and risk prevention. Reflecting the full complexity of the Mediterranean environment, the book is a major scientific contribution to the climate issue, where various scientific considerations converge to break down the boundaries between disciplines.
Book Synopsis Biological Invasions in Europe and the Mediterranean Basin by : F. di Castri
Download or read book Biological Invasions in Europe and the Mediterranean Basin written by F. di Castri and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt: In view of the massive change in the area of distribution of many world biota across classical biogeographical realms, and of the drastic restructuring of the biotic components of numerous ecosystems, the Scientific Committee on Problems of the Environment (SCOPE) decided at its general Assembly in Ottawa, Canada, in 1982 to launch a project on the 'Ecology of Biological Invasions'. Several regional meetings were subsequently organized within the framework of SCOPE, in order to single out the peculiarities of the invasions that took place in each region, the behaviour of their invasive species and the invasibility of their ecosystems. Most noteworthy among such workshops were one in Australia in August 1984, one concerning North America and Hawaii in October 1984, and one dealing with southern Africa in November 1985. A leitmotiv of these workshops was that most of the invasive species to those regions were emanating from Europe and the Mediterranean Basin, inadvertently or intentionally introduced by man. It was therefore considered as a timely endeavour to organize the next regional meeting in relation to this region. The workshop on 'Biological Invasions in Europe and the Mediterranean Basin' was held in Montpellier, France, 21 to 23 May 1986, thanks to the financial support of SCOPE and of the A.W. Mellon Foundation, and the logistic facilities of the Centre National de la Recherche Scientifique (C.N .R.S.).
Download or read book MEGA-CRISES written by Ira Helsloot and published by Charles C Thomas Publisher. This book was released on 2012-08-01 with total page 389 pages. Available in PDF, EPUB and Kindle. Book excerpt: We live in turbulent times with continents and nations facing ever-heightening risks such as natural disasters, intense and protracted conflicts, terrorism, corporate crises, cyber threats to infrastructures and mega-events. We are witnessing the rise of mega-crises and a new class of adversity with many unknowns. The prospect of mega-crises presents professionals and students in the field of crisis management with four major tasks. First, they should engage in “deep thinking” about the causes of the increasing occurrence of mega-crises. Second, they should identify and work through the dominant trends which complicate contemporary crisis management. Third, they should upgrade institutional crisis management capacity. Fourth, they should improve societal resilience since no institutional complex can mitigate or manage these mega-crisis on its own. This book is divided into four primary parts, each of which looks at one facet of mega-crises. Part I focuses on the concept of a mega-crisis and mega-crisis management; Part II examines crisis management of mega-natural disasters; Part III evaluates crisis management of man-made mega-crises; and Part IV identifies mega-threats and vulnerabilities. Additional major topics include Hurricane Katrina; Hurricane Gustav; the London Bombings; the Mumbai Terrorist Attacks of July 7, 2005; corporate meltdowns; the subprime crisis; the Olympic Games; electricity grids; global climate change; the Dutch Delta; risks to food security; and mega-crises and the Internet. This comprehensive text will provide practitioners and academics with the results of an across-the-board research effort in the prospects, nature, characteristics, and the effects of mega-crises.
Book Synopsis Symbolic Construction of Community by : Anthony P. Cohen
Download or read book Symbolic Construction of Community written by Anthony P. Cohen and published by Routledge. This book was released on 2013-03-07 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: Anthony Cohen makes a distinct break with earlier approaches to the study of community, which treated the subject in largely structural terms. His view is interpretive and experiential, seeing the community as a cultural field with a complex of symbols whose meanings vary among its members. He delineates a concept applicable to local and ethnic communities through which people see themselves as belonging to society. The emphasis on boundary is sensitive to the circumstances in which people become aware of the implications of belonging to a community, and describes how they symbolise and utilise these boundaries to give substance to their values and identities.
Book Synopsis Monitoring soils in the environment with remote sensing and gis by : Richard Escadafal
Download or read book Monitoring soils in the environment with remote sensing and gis written by Richard Escadafal and published by IRD Orstom. This book was released on 1996 with total page 674 pages. Available in PDF, EPUB and Kindle. Book excerpt: ISSS congress remote sensing
Book Synopsis Biodiversity and Protected Areas by : Karen Beazley
Download or read book Biodiversity and Protected Areas written by Karen Beazley and published by MDPI. This book was released on 2019-04-16 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biodiversity and Protected Areas assembles twelve topics from around the world, illustrating the complexities and promise of addressing the biodiversity crisis. Authors from Mongolia, Africa, India, Canada, Iraq, and the United States dwell on particular aspects and challenges relevant to those regions. Lessons and approaches from interesting localities, coupled with global analyses give the reader a synthetic view of emerging problems. The opportunities for understanding common issues across different geographies abound, such as comparing local conservation in sub-Saharan Africa with a distribution of very small protected areas in Massachusetts. Several topics will be of immediate interest to policymakers. The book is illustrated with numerous color maps and figures and the authors strove for clear, uncomplicated writing. The editors provide an overview of chapters, placing them in the context of other biodiversity and protected area literature. Students and conservationists attempting to broaden their views of biodiversity and protected areas should find this collection to be interesting.
Book Synopsis Internet Plus Agriculture by : Asian Development Bank
Download or read book Internet Plus Agriculture written by Asian Development Bank and published by Asian Development Bank. This book was released on 2018-09-01 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication reviews the practices and policies of Internet Plus agriculture business models in the People's Republic of China (PRC). It analyzes the agriculture value chain model, rural e-commerce platform, and Internet Plus agriculture service model. The Internet Plus rural economy is an emerging driver of comprehensive development in the PRC as a new production management and marketing tool for farmers and farmers' cooperatives. Its potential is seen as a foundation for vitalizing the countryside and key to achieving agricultural modernization.
Book Synopsis Proceedings of the First National Workshop on State of the Environment Reporting in Zimbabwe by : Lovemore Sola
Download or read book Proceedings of the First National Workshop on State of the Environment Reporting in Zimbabwe written by Lovemore Sola and published by Government of Re. This book was released on 1997 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Franks in the Aegean by : Peter Lock
Download or read book The Franks in the Aegean written by Peter Lock and published by Routledge. This book was released on 2014-01-14 with total page 415 pages. Available in PDF, EPUB and Kindle. Book excerpt: Despite the enormous literature on the crusades, the Frankish states in the Aegean (set up in the wake of the Fourth Crusade in 1204) have been seriously neglected by modern historians. Yet their history is both compelling in itself - these were the last crusader states to be set up in the eastern Mediterranean and among the last to fall to the Turks - and also valuable for the case study they offer in medieval colonialism. Peter Lock surveys the social, economic, religious and cultural aspects of the region within a broad political framework, and explores the clash of cultures between the Frankish interlopers and their Byzantine subjects. This is a major addition to crusading studies.
Author :Food and Agriculture Organization of the United Nations. Land and Water Development Division Publisher :Food & Agriculture Org. ISBN 13 :9789251034293 Total Pages :136 pages Book Rating :4.0/5 (342 download)
Book Synopsis Global and National Soils and Terrain Digital Databases (SOTER) by : Food and Agriculture Organization of the United Nations. Land and Water Development Division
Download or read book Global and National Soils and Terrain Digital Databases (SOTER) written by Food and Agriculture Organization of the United Nations. Land and Water Development Division and published by Food & Agriculture Org.. This book was released on 1993 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Archaeology of Medieval Greece by : Peter Lock
Download or read book The Archaeology of Medieval Greece written by Peter Lock and published by Oxbow Books Limited. This book was released on 1996 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: Greece's importance in the Middle Ages is often neglected by those more concerned with its Prehistoric or Classical past. But, as the colony of Frankish and Italian maritime Empires and as a haven for the Orthodox Church after the fall of Constantinople, the landscape of Greece is covered in a profusion of Medieval art and architecture. This text brings this heritage back to public attention.
Book Synopsis African Ethnobotany in the Americas by : Robert Voeks
Download or read book African Ethnobotany in the Americas written by Robert Voeks and published by Springer Science & Business Media. This book was released on 2012-09-25 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: African Ethnobotany in the Americas provides the first comprehensive examination of ethnobotanical knowledge and skills among the African Diaspora in the Americas. Leading scholars on the subject explore the complex relationship between plant use and meaning among the descendants of Africans in the New World. With the aid of archival and field research carried out in North America, South America, and the Caribbean, contributors explore the historical, environmental, and political-ecological factors that facilitated/hindered transatlantic ethnobotanical diffusion; the role of Africans as active agents of plant and plant knowledge transfer during the period of plantation slavery in the Americas; the significance of cultural resistance in refining and redefining plant-based traditions; the principal categories of plant use that resulted; the exchange of knowledge among Amerindian, European and other African peoples; and the changing significance of African-American ethnobotanical traditions in the 21st century. Bolstered by abundant visual content and contributions from renowned experts in the field, African Ethnobotany in the Americas is an invaluable resource for students, scientists, and researchers in the field of ethnobotany and African Diaspora studies.
Book Synopsis Traveling Cultures and Plants by : Andrea Pieroni
Download or read book Traveling Cultures and Plants written by Andrea Pieroni and published by Berghahn Books. This book was released on 2009-10 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: The tremendous increase in migrations and diasporas of human groups in the last decades are not only bringing along challenging issues for society, especially related to the economic and political management of multiculturalism and culturally effective health care, but they are also creating dramatic changes in traditional knowledge, believes and practices (KBP) related to (medicinal) plant use. The contributors to this volume – all internationally recognized scholars in the field of ethnobiology, transcultural pharmacy, and medical anthropology – analyze these dynamics of traditional knowledge in especially 12 selected case studies. Ina Vandebroek, features in Nova's "Secret Life of Scientists", answering the question: just what is ethnobotany?
Book Synopsis Ethnopharmacologie, sources, méthodes, objectifs by : Jacques Fleurentin
Download or read book Ethnopharmacologie, sources, méthodes, objectifs written by Jacques Fleurentin and published by IRD Editions. This book was released on 1991 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book PC ARCPLOT written by and published by . This book was released on 1994 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
