Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Organic nutrient uptake by mycorrhizal fungi enhances ecosystem carbon storage
T2 - a model-based assessment
AU - Orwin, Kate
AU - Kirschbaum, Miko U. F.
AU - St John, Mark G.
AU - Dickie, Ian A.
PY - 2011
Y1 - 2011
N2 - Understanding the factors that drive soil carbon (C) accumulation is of fundamental importance given their potential to mitigate climate change. Much research has focused on the relationship between plant traits and C sequestration, but no studies to date have quantitatively considered traits of their mycorrhizal symbionts. Here, we use a modelling approach to assess the contribution of an important mycorrhizal fungal trait, organic nutrient uptake, to soil C accumulation. We show that organic nutrient uptake can significantly increase soil C storage, and that it has a greater effect under nutrient-limited conditions. The main mechanism behind this was an increase in plant C fixation and subsequent increased C inputs to soil through mycorrhizal fungi. Reduced decomposition due to increased nutrient limitation of saprotrophs also played a role. Our results indicate that direct uptake of nutrients from organic pools by mycorrhizal fungi could have a significant effect on ecosystem C cycling and storage.
AB - Understanding the factors that drive soil carbon (C) accumulation is of fundamental importance given their potential to mitigate climate change. Much research has focused on the relationship between plant traits and C sequestration, but no studies to date have quantitatively considered traits of their mycorrhizal symbionts. Here, we use a modelling approach to assess the contribution of an important mycorrhizal fungal trait, organic nutrient uptake, to soil C accumulation. We show that organic nutrient uptake can significantly increase soil C storage, and that it has a greater effect under nutrient-limited conditions. The main mechanism behind this was an increase in plant C fixation and subsequent increased C inputs to soil through mycorrhizal fungi. Reduced decomposition due to increased nutrient limitation of saprotrophs also played a role. Our results indicate that direct uptake of nutrients from organic pools by mycorrhizal fungi could have a significant effect on ecosystem C cycling and storage.
KW - Ectomycorrhizas
KW - organic nutrient uptake
KW - ericoid mycorrhizas
KW - soil carbon storage
KW - microbial nutrient limitation
KW - model
KW - mycorrhizal traits
KW - MySCaN
U2 - 10.1111/j.1461-0248.2011.01611.x
DO - 10.1111/j.1461-0248.2011.01611.x
M3 - Journal article
VL - 14
SP - 493
EP - 502
JO - Ecology Letters
JF - Ecology Letters
SN - 1461-023X
IS - 5
ER -