20150612

Author : Schindlbacher, A. Wunderlich, S. Borken, W. Kitzler, B. Zechmeister-Boltenstern, S. Jandl, R.
Year : 2012
Title : Soil respiration under climate change: prolonged summer drought offsets soil warming effects
Journal : Global Change Biology
Comment : Their radiocarbon data suggest that heterotrophic and autotrophic respiration were affected to the same extent by soil warming and drying. Their results suggest that warming causes significant C losses from the soil as long as precipitation patterns remain steady at their study site. If summer droughts become more severe in the future, warming induced C losses will likely be offset by reduced soil CO2 efflux during and after summer drought.

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20170704

Author :   Guo, Q. J.
Zhu, G. X.
Chen, T. B.
Yang, J.
Yang, J. X.
Peters, M.
Wei, R. F.
Tian, L. Y.
Han, X. K.
Hu, J.
Guo, F. T.
Year :  2017

Title : 
Spatial variation and environmental assessment of soil organic carbon isotopes for tracing sources in a typical contaminated site

Journal : 
Journal of Geochemical Exploration

Comment: 
.
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20170627

Author :   Bernal, B.
Megonigal, J. P.
Mozdzer, T. J.

Year :  2017

Title : 
An invasive wetland grass primes deep soil carbon pools

Journal : 
Global Change Biology

Comment: 
 To evaluate the effect of deep rooting on SOM decomposition they designed a mesocosm experiment that differentiates between plant-derived, surface SOM-derived (0–40 cm, active root zone of native marsh vegetation), and deep SOM-derived mineralization (40–80 cm, below active root zone of native vegetation).

 In this mesocosm study, they demonstrated that the addition of novel plant traits to plant communities (e.g., deeply rooted invasive P. australis) can have a disproportionate effect on wetland soil C cycling and mineralization, particularly at depths where native vegetation has little to no live root biomass.
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20171103

Author : Sten Gillner & Sandra Korn & Mathias Hofmann & Andreas Roloff

Year : 2017

Title :Contrasting strategies for tree species to cope with heat and dry conditions at urban sites


Journal :  Urban Ecosyst


Comment: Measurements of leaf gas exchange, leaf water potential, leaf surface temperature and chlorophyll-fluorescence were used for identification of specific response of Corylus corluna L., Ginkgo biloba L., Liriodendron tulipifera L., and Tilia cordata Mill. ‘Greenspire’. 

 The summer months in 2013 with a period of heat and drought over eight weeks only interrupted by two rainy days were appropriate to access tree’s strategies to cope with low water availability. 

 During the measurement period, the influence of high temperatures, high values of vapor pressure deficit (VPD) and low soil water availability on stomatal conductance, water-use efficiency (WUE) and leaf water potential (Ψmin, Ψmax ) was highest for Liriodendron followed by Ginkgo. 

 These species showed high …
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