Description: Das Projekt "The importance of fungal-fungal and bacterial-fungal interactions for phosphorus dynamics in forest soils" wird vom Umweltbundesamt gefördert und von Universität Hohenheim, Institut für Bodenkunde und Standortslehre, Fachgebiet Bodenbiologie durchgeführt. Plant uptake of phosphate (P) in complex forest ecosystems relies to a great extent on microbial mineralization of P from organic and inorganic sources but the relative contributions of the microbial communities to P cycling and allocation in forest soils is not yet very well understood. Within this project we will focus on two interactions that could elucidate key processes of microbial P dynamics in forest sites. We want to clarify the importance of both fungal-fungal and bacterial-fungal interactions for P dynamics in forest soils that are transitioning from P acquiring (efficient mobilization of P from primary and secondary minerals) into P recycling systems (highly efficient cycling of P). We want to reveal furthermore the relative contributions of saprotrophic and ectomycorrhizal fungi to P cycling and allocation. Following a hierarchical approach we want to investigate: (I) the fungal-fungal interaction between saprotrophic and ectomycorrhizal fungi at the plot scale by a systematical exclusion of ectomycorrhizal fungi in the field; (II) elucidate the P dynamics in the mycosphere at the small scale (mm to cm scale) by the use of trenching experiments. (III) investigate the regulation of bacterial as well as fungal P cycling in a microcosm experiment and evaluate the particular microbial uptake, allocation and cycling of P in the mycosphere by the use of several chemical and microbiological approaches. The trenching experiments will be performed on the study sites: Bad Brückenau, Conventwald, Vessertal, Mitterfels and Lüss in close proximity to beech trees (Fagus sylvatica L.). The microcosm experiment will be performed under controlled conditions in the lab.
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Vessertal ? Buche ? Recycling ? Phosphat ? Phosphorsäureester ? Baum ? Bodenbiologie ? Phosphor ? Brunnen ? Bodenkunde ? Waldboden ? Waldökosystem ? Technosol ? Nicht erneuerbarer Rohstoff ? Chemikalien ? Kreislaufsystem ? Nicht erneuerbare Ressource ? Standortwahl ? Studie ? Waldschutz ? Pilz ? Boden ? Rohstoffreserve ? Ernährung ? Mineral ? Ökosystem ? Fahrradfahren ? Umweltprogramm ? Quellen ?
Region: Baden-Württemberg
Bounding box: 9° .. 9° x 48.5° .. 48.5°
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 2013-01-01 - 2024-11-29
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