| Title: | Soil VOC emissions of a Mediterranean woodland are sensitive to shrub invasion |
| Author(s): | Meischner M; Haberstroh S; Daber LE; Kreuzwieser J; Caldeira MC; Schnitzler JP; Werner C; |
| Address: | "Ecosystem Physiology, University of Freiburg, Freiburg, Germany. Forest Research Centre, School of Agriculture, University of Lisbon, Lisbon, Portugal. Research Unit Environmental Simulation, Institute of Biochemical Plant Pathology, Helmholtz Zentrum Munchen, Neuherberg, Germany" |
| ISSN/ISBN: | 1438-8677 (Electronic) 1435-8603 (Linking) |
| Abstract: | "Many belowground processes, such as soil respiration and soil-atmosphere VOC (volatile organic compounds) exchange, are closely linked to soil microbiological processes. However, little is known about how changes in plant species cover, i.e. after plant invasion, alter these soil processes. In particular, the response of soil VOC emissions to plant invasion is not well understood. We analysed soil VOC emissions and soil respiration of a Mediterranean cork oak (Quercus suber) ecosystem, comparing soil VOC emissions from a non-invaded Q. suber woodland to one invaded by the shrub Cistus ladanifer. Soil VOC emissions were determined under controlled conditions using online proton-transfer time-of-flight mass spectrometry. Net soil VOC emissions were measured by exposing soils with or without litter to different temperature and soil moisture conditions. Soil VOC emissions were sensitive to C. ladanifer invasion. Highest net emission rates were determined for oxygenated VOC (acetaldehyde, acetone, methanol, acetic acid), and high temperatures enhanced total VOC emissions. Invasion affected the relative contribution of various VOC. Methanol and acetaldehyde were emitted exclusively from litter and were associated with the non-invaded sites. In contrast, acetone emissions increased in response to shrub presence. Interestingly, low soil moisture enhanced the effect of shrub invasion on VOC emissions. Our results indicate that shrub invasion substantially influences important belowground processes in cork oak ecosystems, in particular soil VOC emissions. High soil moisture is suggested to diminish the invasion effect through a moisture-induced increase in microbial decomposition rates of soil VOC" |
| Keywords: | Acetaldehyde Acetone Ecosystem Forests Methanol Protons *Quercus Soil/chemistry *Volatile Organic Compounds/analysis Cistus ladanifer Quercus suber Ptr-tof-ms Soil VOCs litter soil moisture soil respiration; |
| Notes: | "MedlineMeischner, M Haberstroh, S Daber, L E Kreuzwieser, J Caldeira, M C Schnitzler, J-P Werner, C eng WE 2681/10-1/Deutsche Forschungsgemeinschaft/ UID/AGR/00239/2021/Fundacao para a Ciencia e Tecnologia, I.P., Portugal/ 647008/H2020 European Research Council/ England 2022/06/07 Plant Biol (Stuttg). 2022 Oct; 24(6):967-978. doi: 10.1111/plb.13445. Epub 2022 Jul 8" |
