Beginn

04.11.2021 16:00 Uhr

Ende

04.11.2021 17:30 Uhr

Veranstaltungsort

Online Event

Link siehe unten

Veranstalter

Bundesanstalt für Materialforschung und -prüfung

Grafik zur Vortragsreihe Wissenschaft mit Wirkung

Quelle: BAM

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Vortrag am 4.11.2021

Prof. Friedhelm von Blanckenburg
Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences / Freie Universität Berlin

DateThursday, 4 November 2021, 04:00 pm
Type of EventWebinar
TopicDoes life drive rock weathering?
PresenterProf. Friedhelm von Blanckenburg
Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences – Head of Section “Earth Surface Geochemistry”
Professor of the Geochemistry of the Earth Surface, Freie Universität Berlin
Summaryto follow shortly
LanguagePlants and the microbes that interact with their roots have developed a fantastic trading system. Microbes, mainly bacteria and specialized fungi directly or indirectly decompose minerals in rock and soil and to pass the obtained mineral nutrients, like phosphorus, to the roots of plants that thus satisfy their nutrient demand. In return, plants pass energy in the form of hydrocarbons to the below-ground microbiota. Using estimates of the resulting mineral decomposition rates a massive acceleration of mineral dissolution, called “weathering”, would be expected beneath higher plants. As geochemists we have developed the ability to test whether this is indeed the case in natural field conditions by isotope-based measurements of the chemical mass fluxes involved. Surprisingly, we find no acceleration of weathering along geographic gradients of increasing plant growth. Rather, we find that a sophisticated circular economy is in place: the lower nutrient availability in soil, and the higher the demand of a plant-essential element, the more are these elements recycled. It is fascinating to see how entire plant-microbial systems adapt to their environment. But rock weathering is mainly driven by geologic (relief) and climatic (runoff) forces.
Link-RegistrationWebex
BAM ContactProf. Dr. Anna A. Gorbushina, anna.gorbushina[at]bam.de

This lecture ist part of the LECTURE SERIES Microbes and Environmental Chemistry 14.10. - 18.11.2021. Join us for a virtual trip around the world: on six Thursdays from 14 October to 18 November, always from 4 to 6pm. Six renowned international scientists will share their ground-breaking observations of processes on this planet. The spotlight is on interactions of living organisms and landscapes /materials as mediators of global change in all regions of the Earth.

Moderation

Prof. Anna A. GorbushinaBAM & FU Departments of Biology, Chemistry and Pharmacy & Geosciences
Prof. Matthias Rillig, FU Department of Biology, Chemistry and Pharmacy
Prof. Esther Schwarzenbach, FU Department of Geosciences