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Drying and rewetting of forest floors : dynamics of soluble phosphorus, microbial biomass-phosphorus, and the composition of microbial communities

Title data

Dinh, Mai-Van ; Guhr, Alexander ; Weig, Alfons ; Matzner, Egbert:
Drying and rewetting of forest floors : dynamics of soluble phosphorus, microbial biomass-phosphorus, and the composition of microbial communities.
In: Biology and Fertility of Soils. Vol. 54 (2018) Issue 6 . - pp. 761-768.
ISSN 0178-2762
DOI: https://doi.org/10.1007/s00374-018-1300-y

Abstract in another language

Drying and rewetting (D/W) of soils often leads to a pulse of total dissolved phosphorus (TDP) by lysis of sensitive microorganisms. The relevance ofD/Won the P cycle in ecosystems depends on the duration ofthe TDP release. In forest soils, the forest floor represents a hotspot of microbial activity and is often prone to D/W. Here, we investigated the dynamics of TDP, the microbial P pool (Pmic), and the composition ofmicrobial communities after D/W. Samples were taken from Oi and Oe layers of a European beech and a Norway spruce site and desiccated up to − 100 MPa (pF 6) at 20 °C, while controls were kept moist. TDP and Pmic were measured 0, 1, 3, 7, and 14 days after rewetting and the composition ofmicrobial communities was analyzed by automated ribosomal intergenic spacer analysis after 14 days. After D/W, the largest TDP net release (D/W-control) was from Oe layers with 40–50 mg P kg−1 and inorganic P as the dominant fraction. The TDP concentrations decreased strongly in Oi layers within 1 (beech) to 4 (spruce) days, while remaining stable in Oe layers. The TDP dynamics were linked to the decrease and recovery of Pmic after D/W. Pmic dynamics differed between layers and stand types, suggesting the influence of microbial communities with different D/W sensitivities. The composition ofmicrobial communities varied strongly among sites and layers, while D/W only affected the composition of bacterial and fungal communities in the spruce Oe layer. D/W of forest floors increases the plant available P and affects the P cycle in forest ecosystems.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER142782
BAYCEER147160
Institutions of the University: Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Former Professors
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Soil Ecology
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Former Professors > Chair Soil Ecology - Univ.-Prof. Dr. Egbert Matzner
Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 570 Life sciences, biology
Date Deposited: 24 Jul 2018 08:26
Last Modified: 29 Mar 2019 14:54
URI: https://eref.uni-bayreuth.de/id/eprint/45221