Download or read book G ographie et cologie des milieux tropicaux written by Université de Bordeaux III. Centre de recherche sur les espaces tropicaux and published by . This book was released on 1988 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Tropical Environments written by Martin Kellman and published by Routledge. This book was released on 2003-09-02 with total page 849 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tropical Environments presents a comprehensive introduction to the complex systems of the tropics. Covering a broad, cross-regional range of humid through to semi-arid tropical climate zones, the book features a wealth of case studies drawn from throughout the tropical world. The authors tackle the major problems within the tropics, from complex biological interactions and soil nutrient deficiencies, offering a balanced integration of biophysical and human management issues.

Download or read book Tropical Nature and Other Essays written by Alfred Russel Wallace and published by Library of Alexandria. This book was released on with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is difficult for an inhabitant of our temperate land to realize either the sudden and violent contrasts of the arctic seasons or the wonderful uniformity of the equatorial climate. The lengthening or the shortening days, the ever-changing tints of spring, summer, and autumn, succeeded by the leafless boughs of winter, are constantly recurring phenomena which represent to us the established course of nature. At the equator none of these changes occur; there is a perpetual equinox and a perpetual summer, and were it not for variations in the quantity of rain, in the direction and strength of the winds, and in the amount of sunshine, accompanied by corresponding slight changes in the development of vegetable and animal life, the monotony of nature would be extreme. In the present chapter it is proposed to describe the chief peculiarities which distinguish the equatorial from the temperate climate, and to explain the causes of the difference between them,—causes which are by no means of so simple a nature as are usually imagined. The three great divisions of the earth—the tropical, the temperate, and the frigid zones, may be briefly defined as the regions of uniform, of variable, and of extreme physical conditions respectively. They are primarily determined by the circumstance of the earth’s axis not being perpendicular to the plane in which it moves round the sun; whence it follows that during one half of its revolution the north pole, and during the other half the south pole, is turned at a considerable angle towards the source of light and heat. This inclination of the axis on which the earth rotates is usually defined by the inclination of the equator to the plane of the orbit, termed the obliquity of the ecliptic. The amount of this obliquity is 23½ degrees, and this measures the extent on each side of the equator of what are called the tropics, because within these limits the sun becomes vertical at noon twice a year, and at the extreme limit once a year, while beyond this distance it is never vertical. It will be evident, however, from the nature of the case, that the two lines which mark the limits of the geographical “tropics” will not define any abrupt change of climate or physical conditions, such as characterise the tropical and temperate zones in their full development. There will be a gradual transition from one to the other, and in order to study them separately and contrast their special features we must only take into account the portion of each in which these are most fully exhibited. For the temperate zone we may take all countries situated between 35° and 60° of latitude, which in Europe will include every place between Christiania and Algiers, the districts further south forming a transitional belt in which temperate and tropical features are combined. In order to study the special features of tropical nature, on the other hand, it will be advisable to confine our attention mainly to that portion of the globe which extends for about twelve degrees on each side of the equator, in which all the chief tropical phenomena dependent on astronomical causes are most fully manifested, and which we may distinguish as the “equatorial zone.” In the debateable ground between these two well contrasted belts local causes have a preponderating influence; and it would not be difficult to point out localities within the temperate zone of our maps, which exhibit all the chief characteristics of tropical nature to a greater degree than other localities which are, as regards geographical position, tropical.

Download or read book L co g ographie et l am nagement du milieu naturel written by Jean Kilian and published by FeniXX. This book was released on 1979-01-01T00:00:00+01:00 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cet ouvrage est une réédition numérique d’un livre paru au XXe siècle, désormais indisponible dans son format d’origine.

Download or read book Les milieux naturels du globe written by Jean Demangeot and published by . This book was released on 2006 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: On trouve dans les bibliothèques d'excellents ouvrages de botanique, d'histoire, d'écologie ou de géographie, mais aucun - à notre connaissance - qui considère les problèmes de l'environnement naturel à la fois dans leur globalité et dans leurs particularités régionales concrètes. L'ambition de la 10e édition de ce manuel d'écogéographie est de combler partiellement cette lacune. La globalité écologique se manifeste, certes, dans l'écosystème qui combine les biocénoses (la vie) avec le biotope, support et aliment de cette vie, en un système complexe. Mais il y manque en général un important facteur : les sociétés humaines qui, au moins depuis le Néolithique, ont adapté la nature à leurs besoins et façonné les paysages. Croit-on vraiment que notre Terre ne soit pas influencée par les 6 milliards d'hommes qui l'habitent ? Il faut écrire le mot " naturel " entre guillemets... La régionalisation des milieux " naturels " est une nécessité si l'on veut pratiquer une écologie réaliste : la déforestation n'a pas les mêmes conséquences en Amazonie et en Sibérie, les littoraux n'évoluent pas de la même façon en Angleterre et en Polynésie. D'où l'intervention du géographe qui replace les écosystèmes dans leur spécificité régionale, dans leur contexte historique autant que physique. Le milieu "" naturel " est donc partie intégrante d'une géographie complète et globale. Enfin, il est impossible, de nos jours, lorsque l'on traite de l'action des hommes sur la nature, d'esquiver la grave question de l'éventuel changement de climat planétaire, le fameux global change : encore faut-il l'aborder avec toute l'objectivité nécessaire.

Download or read book Enregistreurs et indicateurs de l volution de l environnement en zone tropicale written by Richard Maire and published by Presses Univ de Bordeaux. This book was released on 1994 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Introduction la phytog ographie des pays tropicaux Les milieux Les groupements v g taux written by Raymond Schnell and published by . This book was released on 1970 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: V. 1. Les flores. Les structures -- v. 2. Les milieux. Les groupements végétaux -- v. 3 et 4. Le flore et la végétation de l'Afrique tropicale. (2 v.).

Download or read book Le paysage written by Jean-François Richard and published by . This book was released on 1989 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Les Espaces naturels tropicaux written by Jean Demangeot and published by Elsevier Masson. This book was released on 1976 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Espaces tropicaux et risques written by Gilbert David and published by IRD Editions. This book was released on 2004 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: En ce début de XXIe siècle, les risques occupent une place prépondérante dans l'actualité de la planète et structurent une nouvelle demande sociale à laquelle la recherche doit apporter des réponses. Au gré des événements qui affectent les rapports entre milieux et sociétés ou les dynamiques internes à ces dernières, de nouveaux risques émergent et les méthodes d'analyse se renouvellent ou se recomposent. Pour le géographe, la notion de risque conduit à une nouvelle manière de voir le monde. Jusqu'au milieu des années quatre-vingt-dix, la géographie tropicale a principalement traité du risque à l'échelle locale, et sous l'angle du risque naturel, souvent réduit à un aléa, dont il s'agissait avant tout de décrire les modalités de fonctionnement. Aujourd'hui, le champ spatial et thématique de l'analyse s'est considérablement élargi et enrichi. A l'emboîtement des échelles - du local au global - répond la grande diversité des problématiques d'étude concernées par le risque et une réflexion épistémologique sur les notions d'aléa, de vulnérabilité et d'enjeux, consubstancielles de la notion de risque. Les Xe journées de Géographie Tropicale qui se sont tenues à Orléans en septembre 2003 attestent de cette évolution et constituent une étape importante dans l'émergence du risque comme thème majeur de la géographie tropicale. Le présent ouvrage reprend 35 des 49 communications et conférences qui y ont été présentées. Il se structure en cinq chapitres respectivement consacrés aux risques naturels ; à la santé publique et aux risques sanitaire ; à la structuration des territoires sous contrainte des risques ; au rapport entre mondialisation et risque territorial ; à la gestion des risques. Le point de vue et les pratiques des communautés locales sont confrontés aux outils et méthodes de la géographie moderne que sont la télédétection et les systèmes d'information géographique.

Download or read book Tropical Nature and Other Essays written by Alfred Russel Wallace and published by Theclassics.Us. This book was released on 2013-09 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1878 edition. Excerpt: ... VIII. THE DISTRIBUTION OF ANIMALS AS INDICATING GEOGRAPHICAL CHANGES. Old Opinions on Continental Changes--Theory of Oceanic Islands--Present and Past Distribution of Land and Sea--Zoological Regions--The Palaarctic Region--The Ethiopian Region--The Oriental Region--Past Changes of the Great Eastern Continent--Regions of the New World--Past History of the American Continents--The Australian Region--Summary and Conclusion. There is a curious old book entitled Restitution of Decayed Intelligence in Antiquities Concerning the Most Noble and Renowned English Nation, written in 1605, by Ii. Verstegcn. The fourth chapter treats "Of the Isles of Albion, and how it is showed to have been continent or firm land with Gallia, now named France, since the Flood of Noe;" and after referring to several ancient writers who had held this opinion but without giving any reasons for it, the author proceeds to argue the point, referring to the narrowness of the straits, their extreme.shallowness, the similarity of the opposite coasts both in height and character, the meaning of the word "cliff" as being that which is cleft asunder, and other matters; after which comes this quaint and interesting passage: --1 This is one of the Lectures on Scientific Geography delivered before the Royal Geographical Society, but the introductory portion lias been rewritten. The original Lecture appeared in the Proceedings of the Society for September, 1877, under the title: "On the Comparative Antiquity of Continents, as indicated by the Distribution of Living and Extinct Auimals." "Another reason there is that this separation hath, been made since the flood, which is also very considerable, .and that is the patriarch Noe, having had with him in the Ark all sorts of beasts, ...

Download or read book The Ecology of man in the tropical environment written by and published by . This book was released on 1964 with total page 355 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Tropical Nature and Other Essays written by Alfred R. Wallace and published by Wentworth Press. This book was released on 2019-03-07 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

Download or read book Les milieux naturels tropicaux written by Jean Demangeot and published by . This book was released on 1969 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Ecology of Man in the Tropical Environment written by International Union for Conservation of Nature and Natural Resources. Technical Meeting and published by . This book was released on 1964 with total page 355 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book L Ecologie de L homme Dans Le Milieu Tropical written by International Union for Conservation of Nature and published by . This book was released on 1964 with total page 355 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Les milieux tropicaux d altitude written by Centre d'études de géographie tropicale (Talence, Gironde). and published by . This book was released on 1981 with total page 307 pages. Available in PDF, EPUB and Kindle. Book excerpt: