Glaser, B; Jentsch, A; Kreyling, J; Beierkuhnlein, C: Soil moisture change caused by experimental extreme summer drought is similar to natural inter-annual variation in a loamy sand in Central Europe, Journal of Plant Nutrition and Soil Science(176), 27–34 (2013), doi:10.1002/jpln.201200188
Abstract:

Intensification of weather extremes is currently emerging as one of the most important facets of climate change. Research frontiers are in analyzing (i) the consequences for the hydrological cycle and (ii) the effects of multi-factor scenarios on ecosystems. However, in all theoretical and experimental scenarios, challenges arise as to how precipitation regimes translate into variation in soil moisture. Here, we explore soil moisture response to  experimental changes in the precipitation regime in Central Europe over a period of 5 years, particularly focusing on the effects of recurrent extreme weather events.

Intra-annual difference in weekly precipitation sums imposed by extreme drought or heavy rainfall manipulations clearly exceeded inter-annual variation in the ambient precipitation pattern during the growing season between 2005 and 2009. However, soil moisture variability in the experimental plots did not clearly reflect any altered patterns to the  manipulated precipitation regime. Natural variation in soil moisture between years was similar to within-season differences between manipulations. Strong differences in soil moisture dynamics during the growing season can however be generated by changing the temporal distribution of rainfall events while keeping the magnitude of the precipitation sum constant.

Our findings confirm a common methodological dilemma in precipitation change experiments searching for a logical way to determine how precipitation change affects communities and ecosystems on relatively short time scales: Alteration of weather regimes according to extreme value statistics and future scenarios or systematic alteration of soil moisture. For central Europe, our data suggest that other factors rather than the magnitude of rainfall exclusion or addition would appear to be decisive for ecosystem response to more extreme precipitation regimes. Response of soil moisture on frequency, return interval and timing of events is a promising approach for further exploration. In addition, buffer capacity of the ecosystem under study has to be taken into account.

Upcoming ...


BayCEER Colloquium:
Th. 2019-12-12
Iron, sulfur and a pinch of antimony - new perspectives on secondary mineral pathways and metalloid mobility
Ecological-Botanical Garden:
Su. 2020-01-05
Auf ins Neue! Winterspaziergang im ÖBG
Su. 2020-01-05
Konzert: Musikalischer Jahresbeginn mit den Rockin`Dinos
Geographisches Kolloquium:
Tu. 2019-12-10
Intensify or diversify? How agriculture affects biodiversity and ecosystem processes in European farmland
Tu. 2019-12-17
The meat of the Anthropocene: Food, capital and the globalisation of industrialised animal killing
BayCEER Blog
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
07.05.2019
EGU – interesting research and free coffee
16.04.2019
Picky carnivorous plants?
RSS Blog as RSS Feed
Weather research site
Luftdruck (356m): 959.4 hPa
Lufttemperatur: 8.2 °C
Niederschlag: 2.0 mm/24h
Sonnenschein: 5 h/d
Wind (Höhe 17m): 13.0 km/h
Wind (Max.): 24.1 km/h
Windrichtung: S

...more
Niederschlag: 0.7 mm/24h
Sonnenschein: <1 h/d

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