Long‐term research catchments to investigate shrub encroachment in the Sonoran and Chihuahuan deserts: Santa Rita and Jornada experimental ranges

Vivoni, Enrique R.; Perez-Ruiz, E. R.; Keller, Zachary T.; Escoto, Eric A.; Templeton, R. C.; Templeton, Nolie P.; Anderson, C. A.; Schreiner-McGraw, Adam; Méndez-Barroso, Luis A.; Robles-Morúa, A.; Scott, Russell L.; Archer, Steven R.; Peters, Debra

doi:10.1002/hyp.14031

Cited by 12 publications

(12 citation statements)

References 20 publications

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“…In arid and semiarid regions, ET is the principal means by which water is lost from an ecosystem, and the ratio ET/ R tends to be close to 100% on annual to interannual scales (e.g., Kurc & Small, 2004; Scott, 2010; Tarín et al, 2020; Vivoni et al, 2021; Yépez et al, 2007). However, the seasonality of internal water storages, typically in the subsurface, can lead to seasons or longer periods when ET/ R > 100% (e.g., Flerchinger et al, 2020; Knowles et al, 2020; Pérez‐Ruiz et al, 2021; Scott et al, 2008).…”

Section: Discussionmentioning

confidence: 99%

Seasonal carryover of water and effects on carbon dynamics in a dryland ecosystem

2022

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Net primary productivity in arid and semiarid regions is controlled by water availability for which rainfall has been a commonly used proxy at annual scales. However, the hydrological partitioning occurring through the water balance can also shape both seasonal and annual net ecosystem productivity. In this study, we used 10 years of water and carbon flux measurements in a mixed shrubland watershed of the Chihuahuan Desert to investigate the seasonal variability and controls on net ecosystem production. Over this period, the site exhibited a bimodal rainfall regime with an average of 211 and 67 mm for the wet (July–December) and dry (January–June) periods of the year, respectively. During the wet season, soil infiltration and channel transmission losses led to an average of 35.8 mm of water stored in the subsurface for subsequent dry periods. By contrast, dry seasons consumed 30.3 mm of stored subsurface water to fulfill the ecosystem water demand, particularly during the springtime. In response, gross primary productivity occurred in equal amounts for both seasons, while ecosystem respiration was substantially higher during the wet season. This resulted in the mixed shrubland acting as an annual net sink of carbon (average of 153.2 g C m−2 year−1) of which 65% occurred during the dry season. We determined that the wet season provided water in excess of vegetation demands in that season, a portion of which was stored in the watershed subsurface for subsequent use, leading to a legacy effect. Gross primary productivity during the dry season was dependent on carryover soil moisture accessed by deep‐rooted shrubs. Our coordinated observations of water–carbon dynamics revealed that water availability during the wet season can sustain the annual ecosystem productivity by impacting the subsequent dry season carbon uptake.

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Section: Discussionmentioning

confidence: 99%

Seasonal carryover of water and effects on carbon dynamics in a dryland ecosystem

2022

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“…For instance, Vivoni et al. (2021) document long‐term average Q / R values ranging from 3% to 7% in a mixed shrubland and a mesquite savanna. Thus, total evapotranspiration can be decomposed into contributions from groundwater (ET gw ) and soil water (ET s = R −

Z_{r} Δ S

), or simply ET = ET gw + ET s .…”

Section: Methodsmentioning

confidence: 99%

Landscape Controls on Water‐Energy‐Carbon Fluxes Across Different Ecosystems During the North American Monsoon

et al. 2021

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“…Esto cobra especial relevancia en sistemas con altas tasas de infiltración del suelo y vegetación perenne, lo cual previene el escurrimiento en gran parte de la superficie (Magliano et al 2017;Karlin et al 2019;Nosetto et al 2020). Muchos autores encontraron que el escurrimiento superficial neto en planicies con índices de aridez similares al Chaco Árido difícilmente supera el 5% de la precipitación anual (Bergkamp 1998;Newman et al 2006;Rodríguez et al 2020;Vivoni et al 2021). En ₁₆₉ estos casos, cualquier labor realizada en un campo, como puede ser un camino, una picada o sectores puntuales expuestos a pastoreo intenso, pueden alterar mucho la circulación superficial del agua.…”

Section: D��unclassified

Distribución espacial y controles ambientales de las represas (tajamares) en el Chaco Árido

et al. 2022

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Long‐term research catchments to investigate shrub encroachment in the Sonoran and Chihuahuan deserts: Santa Rita and Jornada experimental ranges

Cited by 12 publications

References 20 publications

Seasonal carryover of water and effects on carbon dynamics in a dryland ecosystem

Seasonal carryover of water and effects on carbon dynamics in a dryland ecosystem

Landscape Controls on Water‐Energy‐Carbon Fluxes Across Different Ecosystems During the North American Monsoon

Distribución espacial y controles ambientales de las represas (tajamares) en el Chaco Árido

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