Mailing list subscription / Guide for Speakers / Guide for Hosts (PDF, internal)
Due to the Covid-19 pandemic please register online.

Lecture series in Ecology and Environmental Research WS 2015/16

Thursday 12:00-13:30 H6, Geo


Dr. Marie Spohn
Soil Ecology, BayCEER, University of Bayreuth (Homepage)
Thursday, 21.01.2016 12:00-13:30 H6, GEO:

Organic phosphorus mineralization and microbial carbon allocation in soil

Soil element cycling is the basis for many important soil functions and is largely driven by microbial activity. In the talk, I will present recent findings on two aspects of soil element cycling, namely organic phosphorus (P) mineralization and microbial carbon (C) allocation in soil. Special attention will be given to the rhizosphere and in the soil organic layer because these sites are hotspots of element cycling. The rhizosphere is a spatially highly organized microsite in soil. Based on a novel imaging method for exoenzyme activity in soil it was possible to identify the distribution of phosphatase activity that catalyzes organic P mineralization. Further, it was found that microbial and plant phosphatases reacted differently to P availability. Using isotopes, it could be shown that microbial phosphatase activity and organic P mineralization can be stimulated by root exudates. Moreover, it was demonstrated that microbial organic P mineralization can be driven by microbial need for C. The ratios of C-to-nutrients in soil strongly affect microbial C processing. Microbial respiration rates per unit microbial biomass were positively correlated with C-to-nutrient ratios and decreased with soil depth. In order to elucidate microbial C allocation a new method was developed that allows to calculated microbial carbon use efficiency, defined as the ratio of organic C allocated to growth over organic C taken up by the microbial community. The method revealed that microbial carbon use efficiency is not affected by soil depth and organic matter quality but by nitrogen (N) availability. Taken together, the talk will present new insights into the interactions of the cycling of C, N and P, and will discuss the role of stoichiometry for soil element cycling.

More information:Export as iCal: Export iCal
zurück zur Liste
DatelecturerTitle
Wednesday
Room 204, 2. floor/Geo III
10:00-11:30
07.10.2015
Dr. Lucian Staicu
University of Franche-Comté, Department of Science and Technology, Besançon, France
Bacterial metabolism of selenium. Survival or profit? [Abstract]
15.10.2015Prof. Dr. Werner Härdtle
Landscape Ecology and Nature Conservation, University of Lüneburg
Global change impacts on ecosystem functions – the importance of interactive effects [Abstract]
22.10.2015Prof. Declan Kennedy
formerly Chair of Urban Design, Dept. of Architecture, TU Berlin
The New Story Movement and Sustainability [Abstract]
Friday
H27, GW II
09:00-16:00
23.10.2015
- siehe Aushänge -
Berufungsvorträge zur W3-Professur Sportökologie [Abstract]
Wednesday
H36, NW III
15:15-16:45
28.10.2015
Dr. Lars Markesteijn
Community Ecology Research Oxford, University of Oxford, UK / Smithsonian Tropical Research Institute, Panama
What determines biological diversity? [Abstract]
29.10.2015Dr. Sergio Calabrese
Università degli Studi di Palermo; Department of Earth and Marine Science (DiSTeM); Italy
Environmental impact of volcanic emissions [Abstract]
12.11.2015Dr. Dylan James Craven
German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig
Biodiversity effects on ecosystem stability following climate extremes [Abstract]
19.11.2015Dr. Christoph Schmidt
Geomorphology, BayCEER, University of Bayreuth
Of trapped electrons and their relevance in tracing landscape evolution and human history [Abstract]
26.11.2015Dr. Derek Persoh
Institute for Evolution and Biodiversity of Plants, Ruhr-University of Bochum
Fungal community structure and function - from current knowledge towards predictability [Abstract]
Friday
H10, NW I
14:15-15:45
27.11.2015
Prof. Dr. Alexandra-Maria Klein
Naturschutz und Landschaftsökologie, Albert-Ludwigs-Universität Freiburg
Functional diversity, complementarity and trait identity in pollination studies [Abstract]
03.12.2015Dr. Harald Pauli
Department of Conservation Biology, Vegetation and Landscape Ecology Institute of Ecology and Conservation Biology University of Vienna
Past and recent changes in European alpine plant diversity: increases, declines, stagnations and accelerations driven by climate change [Abstract]
10.12.2015Dr. Severin Irl
Biogeography, BayCEER, University of Bayreuth
Plant diversity on high-elevation islands – drivers of species richness and endemism [Abstract]
13:00-14:30
14.01.2016
Prof. Dr. Johannes Kollmann
Restoration Ecology, TUM, Freising
Transformation of grasslands in South Brazil - effects of changing land use on biodiversity and ecosystem functions [Abstract]
21.01.2016Dr. Marie Spohn
Soil Ecology, BayCEER, University of Bayreuth
Organic phosphorus mineralization and microbial carbon allocation in soil [Abstract]
28.01.2016
BayCEER Mitgliederversammlung [Abstract]
Friday
Dr.-Hans-Frisch-Str. 1-3, Raum H7 (Bibliothek)
13:00-14:30
29.01.2016
PD Dr. Reinhard Well, Dr. Lena Rohe
Institut für Agrarklimaschutz, Johann Heinrich von Thünen Institut
Advanced stable isotope tracing and natural abundance methods to unravel N-cycling processes
Scheduling and lecture archive BayCEER Kolloquium (since 2008) and Geoökologisches Kolloquium (starting 2001)
Upcoming ...


BayCEER Colloquium:
Th. 2020-11-05
Signaling of rhizosphere microbiome: key for plant health, development and nutrition
Th. 2020-11-12
Environmental monitoring in Afghanistan’s national parks – regional challenges and global implications
Th. 2020-11-19
Perception under water
Ecological-Botanical Garden:
Su. 2020-11-01
Führung nach Anmeldung: Gegen Grippe, Corona und Co? Pflanzen zur Immunstärkung
Workshop:
Th. 2020-10-29
BayCEER Workshop 2020
BayCEER Blog
13.01.2020
Why Science Communication?
24.05.2019
Stoichiometric controls of C and N cycling
07.05.2019
Flying halfway across the globe to dig in the dirt – a research stay in Bloomington, USA
16.04.2019
Picky carnivorous plants?
RSS Blog as RSS Feed
Weather research site
Luftdruck (356m): 970.8 hPa
Lufttemperatur: 15.8 °C
Niederschlag: 0.0 mm/24h
Sonnenschein: <1 h/d
Wind (Höhe 17m): 3.0 km/h
Wind (Max.): 6.8 km/h
Windrichtung: S

...more
Globalstrahlung: 51 W/m²
Lufttemperatur: 13.8 °C
Niederschlag: 0.0 mm/24h
Sonnenschein: 3 h/d
Wind (Höhe 32m): 0.0 km/h

...more
This site makes use of cookies More information