For Ts Alluviales D Europe Cologie Biog Ographie Valeur Intrins Que

Mieux connaître le fonctionnement et la valeur intrinsèque des forêts alluviales d'Europe est essentiel pour aider les scientifiques, les naturalistes, les gestionnaires et les décideurs politiques à les préserver dans leur intégralité. L'enjeu est donc à la fois écologique et économique. Si la connaissance des grands fleuves a beaucoup progressé, il n'en reste pas moins que les forêts riveraines sont souvent négligées ou considérées pour leur seule valeur économique. Or, ces écosystèmes restent parmi les plus complexes et les plus riches en espèces de l'Europe, et leur renouvellement dépend étroitement du système pulsé du fleuve. Cet ouvrage est une synthèse des connaissances actuelles sur les forêts alluviales, largement illustré de photos et de schémas. Il s'adresse aux étudiants, aux chercheurs, aux enseignants, aux gestionnaires d'espaces naturels alluviaux, aux associations de protection de la nature et plus généralement à un public désireux de comprendre des écosystèmes exceptionnels.

La mise en place du réseau des zones spéciales de conservation par le biais de l'opération Natura 2000, l'établissement des plans de gestion des parcs nationaux et des réserves naturelles de France, le transfert aux régions de la responsabilité de sites sensibles les nombreux programmes de sauvegarde de la biodiversité nécessitent la mise en œuvre d'outils et de démarches pratiques peu intégrés dans la formation actuelle des écologistes. Gestion des habitats naturels et biodiversité vient combler cette lacune : en s'appuyant sur les concepts les plus récents de l'écologie des communautés, de l'écologie de la conservation et de la restauration, ainsi que de la phytosociologie cet ouvrage s'attache à l'élaboration de démarches raisonnées pour définir des modalités appropriées de gestion des habitats naturels. Gestion des habitats naturels et biodiversité vise un double objectif : présenter précisément des méthodes de travail pour donner au lecteur les moyens de les mettre en œuvre pratiquement , exposer des concepts actuels indispensables pour conduire des opérations de gestion qui respectent une démarche scientifique raisonnée et rigoureuse. La première partie de l'ouvrage traite de l'identification des habitats en ayant recours aux démarches de la phytosociologie. L'auteur réintroduit cette discipline en tant que maillon essentiel de la connaissance des milieux et propose des informations pratiques permettant d'en exploiter les résultats (méthodes d'analyse numérique, utilisation des logiciels). Cet ouvrage est le premier à proposer un tel apprentissage à ces méthodes. Le deuxième volet du livre faire le point sur les concepts les plus récents de l'écologie des communautés, en particulier des communautés végétales. De même sont présentés les derniers développements de l'écologie de la conservation et de la restauration. S'appuyant sur des références internationales, les démarches scientifiques proposées sont inédites en langue française.

This book is the first of two volumes intended to replace the old and now out of print Precis de pedologie, the previous three editions of which were pro duced by the same publisher in 1960, 1965 and 1970. It was apparent that the term 'precis', which means that the text was neces sarily condensed and summarised, no longer corresponded with the present day situation, for pedology has developed considerably in the past 10 years and it now makes use of the most modern and varied research techniques. It has become an entirely separate discipline and has assumed, at least in certain countries, considerable importance. In addition, different schools of thought have developed and their sometimes contradictory viewpoints are presented at many international conferences, which, if valid conclusions are to be reached from them, required considerable space for discussion. Thus, even by being very concise it was no longer possible to deal with the whole of soil science within the space of one volume, so that a two volume format became a necessity. As soil science is known to have two fundamentally distinct aspects, it has been easy to determine the contents of each volume and also to give each an identity and unity, as well as enabling a different kind of presentation to be made in each case.

Water is vital for life, and its availability has been a concern for mankind throughout the ages. Its presence has always been ascertained in a variety of ways and the development of human society everywhere is connected with various forms of water management. Man also needed to manage water to find protection from its dangers and the need for that is increasing. In the coming decades, the impact of climate change is expected to intensify floods and droughts, affect groundwater resources, raise sea levels, increase pollution and enhance the frequency and magnitude of disasters. Societies around the world are challenged to adapt to these threats to ensure water security, economic prosperity and environmental and cultural sustainability. This book deals with the heritage of water management and the use that was made of water, as well as the impact of water management on heritage. An example of the former may be an ancient irrigation system in the Filipines or in the Middle East that still functions today, while the latter may reflect the importance of maintaining groundwater levels for the preservation of organic remains on archaeological sites or of wooden piles underneath standing buildings. In either case the papers in this book reflect the dynamic nature of water, and hence the equally dynamic relation between water management and heritage. This publication follows up on a Heritage and Water conference in Amsterdam, the first of its kind. Its main purpose is to credibly present the importance and value of heritage and historical experience for water and sustainable development, and vice versa, present the importance of water management for the protection of heritage. It presents evolving insights and concepts about Water and about Heritage from a variety of disciplines, policy and public perspectives illustrated with cases studies and aims to connect decision makers with experts such as engineers, archaeologists, historians, geographers, ecologist and landscape architects

Two events have recently improved the prospects of protecting fish and their environment in Switzerland: the acceptance of a new Federal Water Protection Law in the plebiscite of May 17th 1992, and the new Federal Legislation on Fisheries, in force since January 1st 1994. With this legal framework, the possibilities for protection of nature and landscape have now considerably improved in Switzerland. The most important aims of the Federal Law on Water Protection are to safeguard the natural habitats of the native flora and fauna and water as the habitat of aquatic organisms. This includes not only the preservation or restoration of water quality in lakes and rivers, but also, in rivers used for hydroelectricity, irrigation or as industrial or other water supplies, the maintenance of sufficient water to fulfill the minimal requirements for fish. However, good quality water in sufficient quan tities alone is not enough to guarantee the survival of fish. Intact fish habitats comprise various phYsical structures including plenty of hiding places, hunting grounds, reproduction and nursery areas within suitable distances from each other. This third aspect of conservation and restoration of aquatic habitats is a central point in the new Federal Law on Fisheries. Whereas the former versions of this law were more concerned with fishery regulations, the recent legislation defines new areas of responsibility for the federal and the cantonal governments.

First published in 1990. A practical manual for identifying the plants of Saudi Arabia’s Eastern Province. This guide is useful for development and conservation of natural resources, includes botanical terminology and so will appeal to those with this knowledge, but also due to the colour plates, to the non-specialist who might be interested in desert wildflowers of the area.