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Hammerl, V. ; Grant, K.* ; Pritsch, K. ; Jentsch, A.* ; Schloter, M. ; Beierkuhnlein, C.* ; Gschwendtner, S.

Seasonal effects of extreme weather events on potential extracellular enzyme activities in a temperate grassland soil.

Front. Env. Sci. 6:157 (2019)
Verlagsversion Forschungsdaten DOI
Open Access Gold
Creative Commons Lizenzvertrag
Magnitude and timing of precipitation events within the growing season might be decisive for alterations in potential extracellular enzyme activity (PEEA), with consequences for nutrient cycle, and carbon storage in grassland ecosystems. Pattern of PEEA catalyzing major steps of the carbon cycle (β-glucosidase (β-gls), cellobiohydrolase (cel), glucuronidase (glr), and xylosidase (xyl), soil respiration rates and extractable organic carbon were analyzed in response to increased intra-annual precipitation variability in a European, mesic temperate grassland. The field experiment was carried out in three subsequent years by simulating recurrent drought events combined with heavy rainfall either early or late in the growing season (spring or summer) by rainout shelters and irrigation systems. Our data indicated comparable effects of the drought settings independent from the timing of the drought. Both for the simulated spring- and summer drought a decrease of enzymatic activities was observed compared to the control plots, with ß-gls activity after the summer drought being the only exception. However, response pattern toward rewetting differed depending on the seasonal timing of the drought being introduced. After spring drought, a fast recovery to control level was observed for PEEA of ß-gls and xyl, whereas cel and glr activity remained constantly lower. Rewetting after summer drought induced an increase of all enzymatic activities to values even higher compared to the controls. Overall, our data indicate a high resilience of PEEA toward drought and rewetting events in grassland soils, which is modulated by the seasonal timing of the extreme weather events.
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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
Korrespondenzautor
Schlagwörter Carbon Cycle ; Climate Change ; Extreme Weather Event ; Potential Extracellular Enzyme Activity ; Precipitation Variability ; Rewetting ; Seasonality ; Severe Drought
ISSN (print) / ISBN 2296-665X
e-ISSN 2296-665X
Zeitschrift Frontiers in Environmental Science
Quellenangaben Band: 6, Heft: , Seiten: , Artikelnummer: 157 Supplement: ,
Verlag Frontiers
Verlagsort Lausanne
Nichtpatentliteratur Publikationen
Begutachtungsstatus Peer reviewed
Institut(e) Research Unit Comparative Microbiome Analysis (COMI)
Institute of Biochemical Plant Pathology (BIOP)
Research Unit Environmental Simulation (EUS)