Abstract
This commentary was written in conjunction with Project LinkA20045 of the international scientific collaboration program i-LINK+ 2018 funded by the Spanish National Research Council (CSIC).
Highlights
Stemflow represents the portion of precipitation routed by vegetation to the base of tree boles or plants stems
VS&A state the importance of stemflow in the hydrology and biogeochemistry of vegetated environments is dependent upon IT size
Empirical Extrapolation Stemflow sampled for 30 trees representing 6 tree species within a laurel forest, Canary Islands
Summary
Stemflow represents the portion of precipitation routed by vegetation to the base of tree boles or plants stems. Van Stan and Allen (2020) ( referred to as VS&A) is a mini review of studies that have attempted to quantify the infiltration area of stemflow once it has reached the soil surface, IT. VS&A provide an overview of: (i) the ability of vegetation canopies to funnel rainfall; (ii) the various approaches used to estimate or measure the size of IT; (iii) the different soil properties that may influence the magnitude of IT, and (iv) the potential for and limitations to using dye and stable isotope tracers in IT research. The objectives of this commentary are to: (i) highlight and expand upon important points raised by VS&A in order to advance the understanding of the controls regulating the size of IT, and (ii) provide corrections to and clarification of prior IT results presented in VS&A. Previous studies (e.g., Iida et al, 2005; Chinen, 2007) have estimated the magnitude of IT using litter marks
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