Kreyling, J; Beierkuhnlein, C; Pritsch, K; Schloter, M; Jentsch, A: Recurrent soil freeze-thaw cycles enhance grassland productivity, New Phytologist, 177, 938-945 (2008), doi:10.1111/j.1469-8137.2007.02309.x
Stichworte: EVENT 1
Abstract:
• Ongoing global warming will increase the frequency of soil freeze–thaw cycles (FTCs) in cool-temperate and other high-latitude regions. The spatial relevance of seasonally frozen ground amounts to c. 55% of the total land area of the northern hemisphere. Evidence suggests that FTCs contribute to nutrient dynamics. Knowledge of their effects on plant communities is scarce, although plants may be the decisive factor in controlling ecosystem functions such as nutrient retention. • Here, the effects are analysed of five additional FTCs in winter for the above- and below-ground productivity of experimental grassland communities and soil enzymatic activity over the following growing season. • Freeze–thaw cycles increased the above-ground productivity but reduced root length over the whole subsequent growing season. In summer, no changes in soil enzymatic activities representing the carbon, nitrogen and phosphorus cycles were observed in the FTC-manipulated plots, except for an increased cellobiohydrolase activity. • Changes in productivity resulting in an increased shoot-to-root ratio and shifts in timing are capable of altering ecosystem stability and ecosystem services, such as productivity and nutrient retention.
Aktuelle Termine


BayCEER-Kolloquium:
Do. 23.01.2020
Understanding biodiversity dynamics – from human dominated systems to the fossil record.
Do. 30.01.2020
BayCEER Mitgliederversammlung
Geographisches Kolloquium:
Di. 28.01.2020
Adivasis in the Anthropocene - What an Environmental History of Eastern India can tell us about the global agricultural and food crisis
Ökologisch-Botanischer Garten:
So. 19.01.2020 aktuell
Kastilien, Navarra und das Baskenland: Orchideen im Land Don Quijotes
So. 02.02.2020
Mehr als Sonne und Strand: Pflanzen der Karibik
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
07.05.2019
EGU – interesting research and free coffee
RSS Blog als RSS Feed
Wetter Versuchsflächen
Luftdruck (356m): 983.3 hPa
Lufttemperatur: 2.2 °C
Niederschlag: 0.0 mm/24h
Sonnenschein: <1 h/d
Wind (Höhe 17m): 6.8 km/h
Wind (Max.): 14.0 km/h
Windrichtung: W

...mehr
Globalstrahlung: 1 W/m²
Lufttemperatur: -0.6 °C
Niederschlag: 0.0 mm/24h
Sonnenschein: <1 h/d
Wind (Höhe 32m): 6.8 km/h

...mehr
Diese Webseite verwendet Cookies. weitere Informationen