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Fellbaum et al. 2014 Fungal nutrient allocation is regulated by C source strength of host plant. New Phytologist

Fellbaum et al. 2014 Fungal nutrient allocation in common mycorrhizal networks is regulated by the carbon source strength of individual host plants. New Phytologist pre-print

http://onlinelibrary.wiley.com/doi/10.1111/nph.12827/abstract

Summary

Common mycorrhizal networks (CMNs) of arbuscular mycorrhizal (AM) fungi in the soil simultaneously provide multiple host plants with nutrients, but the mechanisms by which the nutrient transport to individual host plants within one CMN is controlled are unknown.

New Phytologist Virtual Issue: Scaling root processes

Some of the papers are already posted but the whole issue might be of interests to many of us.

http://issuu.com/wblifesci/docs/scaling_root_processes_vsi

Plant rhizosphere influence on microbial C metabolism: the role of elevated CO2, N availability and root stoichiometry

http://link.springer.com/article/10.1007%2Fs10533-014-9954-5

Yolima Carrillo • Feike A. Dijkstra •
Elise Pendall • Dan LeCain • Colin Tucker

Abstract Microbial decomposer C metabolism is
considered a factor controlling soil C stability, a key
regulator of global climate. The plant rhizosphere is
now recognized as a crucial driver of soil C dynamics
but specific mechanisms by which it can affect C
processing are unclear. Climate change could affect
microbial C metabolism via impacts on the plant
rhizosphere. Using continuous 13C labelling under

Xu et al. 2013. Global analysis of soil microbial biomass C, N, P

Xu et al. 2013. A global analysis of soil microbial biomass carbon, nitrogen and phosphorus in terrestrial ecosystems. Global Ecology and Biogeography 22:737-749.

Main conclusions

Reichstein et al. 2013. Climante Extremes and the C Cycle. Nature

The terrestrial biosphere is a key component of the global carbon cycle and its carbon balance is strongly influenced by climate. Continuing environmental changes are thought to increase global terrestrial carbon uptake. But evidence is mounting that climate extremes such as droughts or storms can lead to a decrease in regional ecosystem carbon stocks and therefore have the potential to negate an expected increase in terrestrial carbon uptake.

C and N effects on microbial biomass and microbial communities

C.M. Kallenbach and A.S. Grandy. 2011. Controls over soil microbial biomass responses to carbon amendments in agricultural systems: A meta-analysis. Agriculture, Ecosystems, and Environment. 144: 241-252.

Ramirez, K.S., J.M. Craine, N. Fierer. 2012. Consistent effects of nitrogen amendments on soil microbial communities and processes across biomes. Global Change Biology. doi: 10.1111/j.1365-2486.2012.02639.x [pdf]
http://www.colorado.edu/eeb/EEBprojects/FiererLab/Ramirez_etal_GCB_2012.pdf

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