mark smits edited Conclusions__.md  almost 8 years ago

Commit id: dce8d3bd4d00b4fe2dd5629498cc854515a89699

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#Conclusions   Despite the high number laboratory experiments demonstrating fungal-mineral interactions, there is no clear evidence that these laboratory scale observations observed processes  play a significant role on soil scale mineral dissolution rates. Field and modeling studies indicate that protons are the dominant chemical weathering agents. Organic weathering agents like oxalate and citrate only play a minor role.  Potentially these organic weathering agents could play a more important role if they stay close to mineral surfaces. surfaces or are preferentially exuded near more reactive parts of the mineral surfaces (e.g. crystal steps and cracks).  The observations of 'trenches' and 'canals' in the shape of fungal hyphae (e.g. \cite{Saccone_2011} points towards local distinct weathering environments, although it could not be excluded that these shapes are artefacts of the hyphal removal procedure.  In order to better estimate the potential role of these local weathering environments on total dissolution rates, the local liquid chemistry should be studied on the micrometer scale, and upscaled to soil scale dissolution rates.