@phdthesis{Germer2008, author = {Germer, Sonja}, title = {Near-surface hydrology and hydrochemistry under contrasting land-cover}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-19049}, school = {Universit{\"a}t Potsdam}, year = {2008}, abstract = {Human transformation of the Earth's land surface has far-reaching and important consequences for the functioning of hydrological and hydrochemical processes in watersheds. In nowadays land-use change from forest to pasture is a major issue in particular in the tropics. A sustainable management of deforested areas requires an in-depth understanding of the water and nutrient cycle. On this basis we compared the involved hydrological pathways for rainfall to reach streams and the nutrient budgets of a tropical rainforest and a pasture. In addition we studied the links of hydrochemical differences to differences of the relative importance of flowpaths. This study was conducted in the southwestern part of the Brazilian Amazon basin. An intensive hydrological and hydrochemical sampling and monitoring network was set up. The results indicate that the hydrology was modified in many ways due to land-use change. The most important alteration was the increased importance of the fast flowpath overland flow. Solute exports were in particular linked to the increased volume of overland flow that resulted from the land-use change. An additional reason for the increased nutrient exports from the pasture are the high concentrations of these nutrients in pasture overland flow probably as a due to cattle excrements. Tight nutrient cycles with minimal nutrient losses could not be maintained after the land-use change. This study provides the first attempt to quantify the respective nutrient losses.}, language = {en} } @misc{HollEtteKnoblochetal.2009, author = {Holl, Frank and Ette, Ottmar and Knobloch, Eberhard and Rodr{\´i}guez, Jos{\´e} {\´A}ngel and Durisch Acosta, Christian and Astuhuam{\´a}n Gonzales, C{\´e}sar W. and Covarrubias, Jos{\´e} Enrique and K{\"u}gelgen, Helga von and P{\´e}rez Brignoli, Hector and Kraft, Tobias and Einert, Katharina}, title = {HiN : Alexander von Humboldt im Netz = Humboldt und Hispano-Amerika : Vergangenheit, Gegenwart und Zukunft (Vol. 1)}, volume = {X}, number = {19}, editor = {Ette, Ottmar and Knobloch, Eberhard}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, issn = {1617-5239}, doi = {10.25932/publishup-3187}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-42917}, pages = {155}, year = {2009}, abstract = {Inhalt: - Frank Holl: Vorwort / Prefacio - Ottmar Ette: Entre mundos - v{\´i}as de Alexander von Humboldt hacia la conciencia universal - Eberhard Knobloch: Alexander von Humboldts Weltbild - Jos{\´e} {\´A}ngel Rodr{\´i}guez: El culto a Humboldt en Venezuela - Christian Durisch Acosta: Die Humboldt-Rezeption in Ecuador - ein kulturgeschichtlicher Beitrag zum ecuadorianischen Nationsbildungsprozess - C{\´e}sar W. Astuhuam{\´a}n Gonz{\´a}les: Incas, J{\´i}varos y la obra de Humboldt Vues des Cordill{\`e}res - Jos{\´e} Enrique Covarrubias: La recepci{\´o}n de la figura y obra de Humboldt en M{\´e}xico 1821-2000 - Helga von K{\"u}gelgen: Klassizismus und vergleichendes Sehen in den Vues des Cordill{\`e}res - Hector P{\´e}rez Brignoli: Alexander von Humboldt en Centroam{\´e}rica y en el R{\´i}o de la Plata - Tobias Kraft und Katharina Einert: Das ganze Werk in einem Netz? Bibliographie online verf{\"u}gbarer Alexander-von-Humboldt-Digitalisate}, language = {mul} }