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Ecology And Man In Mexico S Central Volcanoes Area

Author: G.W. Heil
Publisher: Springer Science & Business Media
ISBN: 9400709692
Size: 77.10 MB
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The main activities of the economically active population around The Iztaccíhuatl and Popocatépetl volcanoes region lie in the primary sector (65- 90%). Of the people working in this sector, those dependent on agricultural or pastoral activities generally have an income significantly lower than the minimum wage in Mexico. Of the activities in the area, these agricultural, pastoral, and forestry activities probably have the most direct effect on the ecology of the volcanoes and its immediate surroundings. Traditional farmers, producing crops such as beans, pumpkins and cucumbers, generally work on small fields using traditional methods and animal traction. Modern farming, geared towards intensive production develops on larger sites making use of modern machinery, fertilizers, and pesticides. As the area under agriculture continues to increase every year, the attendant opening of large forested areas, soil modification, and ensuing erosion make it almost impossible for forest recovery. Extensive forestry in the region mainly concerns cutting and collecting wood, cutting Pinus-branches for torches or for utensils for open-fire cooking, collection of mushrooms, and hunting. Although these (often clandestine) activities seem to be small-scale, their adverse effects on the forest have been substantial. Weekend visitors from Mexico City heavily dominate recreation, with tourism concentrated near the roads leading to and inside the park. Lacking organization and facilities, most recreational activities have had significant environmental impact on the area In many countries, the decline of nature has occurred because of changes in land use.

Ecology And Man In Mexico S Central Volcanoes Area

Author: Gerrit W. Heil
Publisher: Springer Science & Business Media
ISBN: 9781402017087
Size: 41.63 MB
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Mexico has been recognized as one of the most diverse countriesin the world with roughly 10-12% of world's species in a territory ofonly approximately 1.5% of the world's total emerged land. In general, the explanation for the high number of species richness in Mexico hasbeen sought in the complex geologic history, the varied climaticregions because of the large altitudinal differences and the fact thattwo of the major realms, the Nearctic and Neotropic, meet in Mexico.This book shows numerous methodologies for collecting, processing andanalyzing data from natural area, illustrating it in applications toMexico's Iztaccihuatl-Popocatepetl National Park. Thebook is written for ecologists, geographers, graduate biology studentsand natural resource managers. It therefore responds directly andprimarily to their viewpoints and objectives. However, since ecosystemmanagement and decisions about natural-area preservation take placewithin socioeconomic and political environments that are dynamic andplural, conflicts with those objectives are sure to arise. Therefore, the last chapter goes beyond managers' objectives and viewpoints"per" "se" to explore and respond to potential conflicts.

Alexander Von Humboldt Und Die Erfindung Der Natur

Author: Andrea Wulf
Publisher: C. Bertelsmann Verlag
ISBN: 3641195500
Size: 68.71 MB
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Was hat Alexander von Humboldt, der vor mehr als 150 Jahren starb, mit Klimawandel und Nachhaltigkeit zu tun? Der Naturforscher und Universalgelehrte, nach dem nicht nur unzählige Straßen, Pflanzen und sogar ein »Mare« auf dem Mond benannt sind, hat wie kein anderer Wissenschaftler unser Verständnis von Natur als lebendigem Ganzen, als Kosmos, in dem vom Winzigsten bis zum Größten alles miteinander verbunden ist und dessen untrennbarer Teil wir sind, geprägt. Die Historikerin Andrea Wulf stellt in ihrem vielfach preisgekrönten – so auch mit dem Bayerischen Buchpreis 2016 – Buch Humboldts Erfindung der Natur, die er radikal neu dachte, ins Zentrum ihrer Erkundungsreise durch sein Leben und Werk. Sie folgt den Spuren des begnadeten Netzwerkers und zeigt, dass unser heutiges Wissen um die Verwundbarkeit der Erde in Humboldts Überzeugungen verwurzelt ist. Ihm heute wieder zu begegnen, mahnt uns, seine Erkenntnisse endlich zum Maßstab unseres Handelns zu machen – um unser aller Überleben willen.