Description: Das Projekt "Forschergruppe (FOR) 816: Biodiversity and Sustainable Management of a Megadiverse Mountain Ecosystem in South Ecuador, B1: The biology of southern bracken in the anthropogenic ecosystem in the San Francisco valley of South Ecuador" wird/wurde gefördert durch: Deutsche Forschungsgemeinschaft. Es wird/wurde ausgeführt durch: Universität Bayreuth, Fachgruppe Biologie, Bayreuther Zentrum für Ökologie und Umweltforschung (BayCEER), Lehrstuhl für Pflanzenphysiologie.Bracken covers about 40% of the pastures in the San Francisco valley and it is still spreading. Preliminary results suggest that bracken is composed of 2 species Pteridium arachnoideum and caudatum and several genetically differing lines. The taxonomic composition of bracken in the research area will be analysed using morphological characters, allozyme analysis and DNA-microsatellites. In a firetriggered succession, bracken outcompetes the pasture grass Setaria. This process is simulated by a model which is based on field measurements (ecological, ecophysiological, radiation data) assuming competition for light as the decisive factor. An extra module simulates the effect of burning on the competition. The model shall be extended to a third plant life form, the bush Baccharis latifolia, which is very common in the bracken-infested pastures. It shall also be applied to the effects of grazing and of bracken control measures which have been running for 2.5 years. The bracken control experiment has meanwhile merged in a repastorization experiment which shall be continued. Invasion and spreading of bracken since 1975 will be traced from Landsat scenes and the current appearance and further spreading of a bracken blight disease, a potential means of biocontrol shall be followed with QuickBird scenes.
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Süßgräser ? Populationsökologie ? Vegetation ? Feuerökologie ? Vegetationsdynamik ? Ecuador ? Biologische Wirkung ? Farn ? Vegetationsbrand ? Unkraut ? Strahlungsmessung ? Szenario ? Verbrennung ? Biologische Konkurrenz ? Alpines Ökosystem ? Messdaten ? Ökosystemmodell ? Prognosemodell ? Simulation ? Artenvielfalt ? Beweidung ? Unkrautbekämpfung ? Wirkungsanalyse ? Weideland ? Verbreitungsgebiet ? Fallstudie ? Feuer ? Modellierung ? Krankheit ? Landwirtschaft ? Datenerhebung ? Tal ? Nachhaltige Bewirtschaftung ? Biodiversität ? Art [Spezies] ? Wachstum [biologisch] ? Adlerfarne ? bracken ? plant functional types (PFTs) ? Pteridium aquilinum s.I. ? Pteridium arachnoideum ? Setaria sphacelata ?
Region: Bayern
Bounding boxes: 12.53381° .. 12.53381° x 47.795° .. 47.795°
License: cc-by-nc-nd/4.0
Language: Englisch/English
Time ranges: 2007-02-01 - 2010-01-01
Webseite zum Förderprojekt
http://gepris.dfg.de/gepris/projekt/29937865 (Webseite)Webseite zum Förderprojekt
http://www.bergregenwald.de/home.do (Webseite)Accessed 1 times.