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Kurth, J. ; Albrecht, M.* ; Karsten, U.* ; Gläser, K.* ; Schloter, M. ; Schulz, S.

Correlation of the abundance of bacteria catalyzing phosphorus and nitrogen turnover in biological soil crusts of temperate forests of Germany.

Biol. Fertil. Soils 57, 179-192 (2020)
Publ. Version/Full Text Research data DOI
Open Access Gold (Paid Option)
Creative Commons Lizenzvertrag
Soil P pools are strongly driven by microbial activities, and vice versa, P pools shape bacterial communities and their functional potential. Biological soil crusts (biocrusts) represent a microbial hotspot for nutrient turnover. We compared biocrusts and bulk soil samples from different temperate beech (Fagus sylvaticaL.) forests representing a gradient in soil texture, nutrient concentrations, and pH values at biocrust peak biomass. We measured the total and plant-available P and N concentrations and assessed the bacterial potential to mineralize (phoD,phnX), solubilize (gcd), and take up P (pstSandpitA) and mineralize (chiA,apr) and fix N (nifH) by quantifying the respective marker genes (qPCR). We found an increase of absolute and relative bacterial abundance involved in P turnover in biocrusts, but the strategy to acquire P differed between the regions as bacteria harboring the starvation-inducedpstSgene were most abundant where labile P was lowest. In contrast, the region with lowest total P concentrations has a higher potential to utilize more stable phosphonates. N mineralization was strongly correlated to P turnover at regions with increased labile N and P concentrations. Interestingly, the potential to fix N was highest in the bulk soil where total P concentrations were highest. Even though the correlation of N and P turnover is strongest if their ratio is low, the acquisition strategy strongly depends on soil properties.
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Publication type Article: Journal article
Document type Scientific Article
Corresponding Author
Keywords Biological Soil Crust ; Microbial N Turnover ; Microbial P Turnover ; Temperate Forest ; Qpcr ; Biodiversity Exploratories; Management Intensity; Inorganic Nitrogen; Plant Diversity; Land-use; Genes; Biocrusts; Phosphate; Hotspots; Carbon; Ph
ISSN (print) / ISBN 0178-2762
e-ISSN 1432-0789
Quellenangaben Volume: 57, Issue: 2, Pages: 179-192 Article Number: , Supplement: ,
Publisher Springer
Publishing Place One New York Plaza, Suite 4600, New York, Ny, United States
Non-patent literature Publications
Reviewing status Peer reviewed
Grants DFG Priority Program 1374 "Infrastructure-Biodiversity-Exploratories"
Projekt DEAL