Canopy Height and Climate Dryness Parsimoniously Explain Spatial Variation of Unstressed Stomatal Conductance
Abstract The spatio‐temporal variation of stomatal conductance directly regulates photosynthesis, water partitioning, and biosphere‐atmosphere interactions. While many studies have focused on stomatal response to stresses, the spatial variation of unstressed stomatal conductance remains poorly deter...
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| Format: | Article |
| Language: | English |
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Wiley
2022-08-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2022GL099339 |
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| author | Yanlan Liu Olivia Flournoy Quan Zhang Kimberly A. Novick Randal D. Koster Alexandra G. Konings |
| author_facet | Yanlan Liu Olivia Flournoy Quan Zhang Kimberly A. Novick Randal D. Koster Alexandra G. Konings |
| author_sort | Yanlan Liu |
| collection | DOAJ |
| description | Abstract The spatio‐temporal variation of stomatal conductance directly regulates photosynthesis, water partitioning, and biosphere‐atmosphere interactions. While many studies have focused on stomatal response to stresses, the spatial variation of unstressed stomatal conductance remains poorly determined, and is usually characterized in land surface models (LSMs) simply based on plant functional type (PFT). Here, we derived unstressed stomatal conductance at the ecosystem‐scale using observations from 115 global FLUXNET sites. When aggregated by PFTs, the across‐PFT pattern was highly consistent with the parameterizations of LSMs. However, PFTs alone captured only 17% of the variation in unstressed stomatal conductance across sites. Within the same PFT, unstressed stomatal conductance was negatively related to climate dryness and canopy height, which explained 45% of the total spatial variation. Our results highlight the importance of plant‐environment interactions in shaping stomatal traits. The trait‐environment relationship established here provides an empirical approach for improved parameterizations of stomatal conductance in LSMs. |
| format | Article |
| id | doaj-art-f0ffd789eaf340f9ac7b31df523ff5b2 |
| institution | DOAJ |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2022-08-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-f0ffd789eaf340f9ac7b31df523ff5b22025-08-20T03:10:20ZengWileyGeophysical Research Letters0094-82761944-80072022-08-014915n/an/a10.1029/2022GL099339Canopy Height and Climate Dryness Parsimoniously Explain Spatial Variation of Unstressed Stomatal ConductanceYanlan Liu0Olivia Flournoy1Quan Zhang2Kimberly A. Novick3Randal D. Koster4Alexandra G. Konings5School of Earth Sciences The Ohio State University Columbus OH USADepartment of Geophysics Stanford University Stanford CA USAState Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan University Wuhan ChinaO’Neill School of Public and Environmental Affairs Indiana University Bloomington Bloomington IN USAGlobal Modeling and Assimilation Office NASA GSFC Greenbelt MD USADepartment of Earth System Science Stanford University Stanford CA USAAbstract The spatio‐temporal variation of stomatal conductance directly regulates photosynthesis, water partitioning, and biosphere‐atmosphere interactions. While many studies have focused on stomatal response to stresses, the spatial variation of unstressed stomatal conductance remains poorly determined, and is usually characterized in land surface models (LSMs) simply based on plant functional type (PFT). Here, we derived unstressed stomatal conductance at the ecosystem‐scale using observations from 115 global FLUXNET sites. When aggregated by PFTs, the across‐PFT pattern was highly consistent with the parameterizations of LSMs. However, PFTs alone captured only 17% of the variation in unstressed stomatal conductance across sites. Within the same PFT, unstressed stomatal conductance was negatively related to climate dryness and canopy height, which explained 45% of the total spatial variation. Our results highlight the importance of plant‐environment interactions in shaping stomatal traits. The trait‐environment relationship established here provides an empirical approach for improved parameterizations of stomatal conductance in LSMs.https://doi.org/10.1029/2022GL099339unstressed stomatal conductancestomatal traitenvironment‐trait interactioncanopy heightclimate drynessenvironmental filter |
| spellingShingle | Yanlan Liu Olivia Flournoy Quan Zhang Kimberly A. Novick Randal D. Koster Alexandra G. Konings Canopy Height and Climate Dryness Parsimoniously Explain Spatial Variation of Unstressed Stomatal Conductance Geophysical Research Letters unstressed stomatal conductance stomatal trait environment‐trait interaction canopy height climate dryness environmental filter |
| title | Canopy Height and Climate Dryness Parsimoniously Explain Spatial Variation of Unstressed Stomatal Conductance |
| title_full | Canopy Height and Climate Dryness Parsimoniously Explain Spatial Variation of Unstressed Stomatal Conductance |
| title_fullStr | Canopy Height and Climate Dryness Parsimoniously Explain Spatial Variation of Unstressed Stomatal Conductance |
| title_full_unstemmed | Canopy Height and Climate Dryness Parsimoniously Explain Spatial Variation of Unstressed Stomatal Conductance |
| title_short | Canopy Height and Climate Dryness Parsimoniously Explain Spatial Variation of Unstressed Stomatal Conductance |
| title_sort | canopy height and climate dryness parsimoniously explain spatial variation of unstressed stomatal conductance |
| topic | unstressed stomatal conductance stomatal trait environment‐trait interaction canopy height climate dryness environmental filter |
| url | https://doi.org/10.1029/2022GL099339 |
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