What Ecohydrologic Separation Is and Where We Can Go With It
The “ecohydrologic separation” hypothesis challenged assumptions of translatory flow through the rooting zone. However, studies aiming to test ecohydrologic separation have largely done so with insufficient discussion of infiltration and rooting zone recharge processes and instead have mostly focused on either isotopic differences between stream water and plant water or the presence of fractionated isotope ratios in plant water. Based on extensively observed heterogeneities in soils and watersheds, we posit that differences in isotopic compositions of water in plants, streams, and other subsurface pools are expected in most scenarios. Interpretation of those plant-and-stream water isotopic differences is important, but diagnosing the role of any specific process is typically confounded by the diversity of potential mechanisms contributing to those isotopic differences. Thus, we should progress from simply describing their occurrences and refocus the discussion of ecohydrologic separation on how heterogeneous infiltration and root uptake processes lead to such differences. Consequently, we outline areas where plant and soil-water stable isotope data may be useful for advancing our understanding and representation of soil-water transport and plant-water recharge.
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Wiley-VCH
2020
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Subjects: | Ecohydrologic Separation, |
Online Access: | http://hdl.handle.net/10261/233481 |
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dig-idaea-es-10261-2334812021-10-11T07:07:38Z What Ecohydrologic Separation Is and Where We Can Go With It Sprenger, Matthias Allen, Scott T. Ecohydrologic Separation The “ecohydrologic separation” hypothesis challenged assumptions of translatory flow through the rooting zone. However, studies aiming to test ecohydrologic separation have largely done so with insufficient discussion of infiltration and rooting zone recharge processes and instead have mostly focused on either isotopic differences between stream water and plant water or the presence of fractionated isotope ratios in plant water. Based on extensively observed heterogeneities in soils and watersheds, we posit that differences in isotopic compositions of water in plants, streams, and other subsurface pools are expected in most scenarios. Interpretation of those plant-and-stream water isotopic differences is important, but diagnosing the role of any specific process is typically confounded by the diversity of potential mechanisms contributing to those isotopic differences. Thus, we should progress from simply describing their occurrences and refocus the discussion of ecohydrologic separation on how heterogeneous infiltration and root uptake processes lead to such differences. Consequently, we outline areas where plant and soil-water stable isotope data may be useful for advancing our understanding and representation of soil-water transport and plant-water recharge. M.S. was supported by the Deutsche Forschungsgemeinschaft (project no. 397306994). This commentary was improved by comments from two anonymous reviewers, Editors Holly Barnard and Ilja van Meerveld, Todd Dawson, and Wouter Berghuijs, and has been influenced by conversations with Renee Brooks and many others. 2021-03-09T07:00:03Z 2021-03-09T07:00:03Z 2020 2021-03-09T07:00:04Z artículo http://purl.org/coar/resource_type/c_6501 doi: 10.1029/2020WR027238 issn: 1944-7973 Water Resources Research 56 (2020) http://hdl.handle.net/10261/233481 10.1029/2020WR027238 Postprint http://dx.doi.org/10.1029/2020WR027238 Sí open Wiley-VCH |
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Ecohydrologic Separation Ecohydrologic Separation Sprenger, Matthias Allen, Scott T. What Ecohydrologic Separation Is and Where We Can Go With It |
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The “ecohydrologic separation” hypothesis challenged assumptions of translatory flow through the rooting zone. However, studies aiming to test ecohydrologic separation have largely done so with insufficient discussion of infiltration and rooting zone recharge processes and instead have mostly focused on either isotopic differences between stream water and plant water or the presence of fractionated isotope ratios in plant water. Based on extensively observed heterogeneities in soils and watersheds, we posit that differences in isotopic compositions of water in plants, streams, and other subsurface pools are expected in most scenarios. Interpretation of those plant-and-stream water isotopic differences is important, but diagnosing the role of any specific process is typically confounded by the diversity of potential mechanisms contributing to those isotopic differences. Thus, we should progress from simply describing their occurrences and refocus the discussion of ecohydrologic separation on how heterogeneous infiltration and root uptake processes lead to such differences. Consequently, we outline areas where plant and soil-water stable isotope data may be useful for advancing our understanding and representation of soil-water transport and plant-water recharge. |
format |
artículo |
topic_facet |
Ecohydrologic Separation |
author |
Sprenger, Matthias Allen, Scott T. |
author_facet |
Sprenger, Matthias Allen, Scott T. |
author_sort |
Sprenger, Matthias |
title |
What Ecohydrologic Separation Is and Where We Can Go With It |
title_short |
What Ecohydrologic Separation Is and Where We Can Go With It |
title_full |
What Ecohydrologic Separation Is and Where We Can Go With It |
title_fullStr |
What Ecohydrologic Separation Is and Where We Can Go With It |
title_full_unstemmed |
What Ecohydrologic Separation Is and Where We Can Go With It |
title_sort |
what ecohydrologic separation is and where we can go with it |
publisher |
Wiley-VCH |
publishDate |
2020 |
url |
http://hdl.handle.net/10261/233481 |
work_keys_str_mv |
AT sprengermatthias whatecohydrologicseparationisandwherewecangowithit AT allenscottt whatecohydrologicseparationisandwherewecangowithit |
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