DIFERENTES ESTRATEGIAS EN LAS DINÁMICAS DE FLUJO DE SAVIA Y NICHO HIDROLÓGICO DE ÁRBOLES DOMINANTES EN EL DESIERTO SONORENSE POSIBILITAN SU COEXISTENCIA

Enrique Martínez-Núñez; Alejandro E. Castellanos; Shishir Basant; Christian Ortega; Brad P. Wilcox; Enrico A. Yépez; Julio C.Y. Rodríguez; José R. Romo-León

doi:10.17129/botsci.3303

DIFERENTES ESTRATEGIAS EN LAS DINÁMICAS DE FLUJO DE SAVIA Y NICHO HIDROLÓGICO DE ÁRBOLES DOMINANTES EN EL DESIERTO SONORENSE POSIBILITAN SU COEXISTENCIA

Translated title of the contribution: DIFFERENT STRATEGIES IN SAP FLOW DYNAMICS AND HYDROLOGICAL NICHE OF DOMINANT SONORAN DESERT TREES ENABLE THEIR COEXISTENCE

Enrique Martínez-Núñez, Alejandro E. Castellanos^*, Shishir Basant, Christian Ortega, Brad P. Wilcox, Enrico A. Yépez, Julio C.Y. Rodríguez, José R. Romo-León

^*Corresponding author for this work

Departamento de Investigaciones Científicas y Tecnológicas

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

Background: Plants in arid ecosystems exhibit adaptive traits to periodic droughts. It is predicted that droughts will become more frequent and intense due to global change. Studying plant ecophysiological traits will help understand their adaptations to water limitations. In arid ecosystems of northwestern Mexico, evergreen and deciduous trees coexist, with little knowledge of their responsible hydrological functional traits. Questions: What are the differences in drought resistance and hydraulic traits for coexisting trees in a semi-arid community? Are we able to determine their coexistence mechanisms? Studied species: Olneya tesota, Ipomoea arborescens and Jatropha cordata. Study site and dates: Desert shrubland/subtropical shrubland community in central Sonora, Mexico, in 2021. Methods: Sap flux density (F_d) was measured continuously with heat dissipation method probes, and predawn (Ψ_pd), midday (Ψ_md) water potentials and stomatal conductance (g_s) during the summer wet season. Results: Olneya (evergreen) was found to maintain F_d throughout the year, but Ipomoea and Jatropha (deciduous) only during the wet summer season. The maximum F_d of Ipomoea and Jatropha (~1,200 g cm^-2 day^-1) were two times higher than Olneya (600 g cm^-2 day^-1). During dry spells, deciduous trees decreased their F_d. Water potentials and stomatal conductances allowed differentiation of the hydrologic niches of isohydric (Ipomoea and Jatropha) and anisohydric (O. tesota) functional types. Conclusions: We found a gradient of diminishing drought resistance from Ipomoea, Jatropha to Olneya. These species enhanced coexistence because of their hydrological niches, determined by their sap flow, iso-anisohydric strategies, and rooting depths.

Translated title of the contribution	DIFFERENT STRATEGIES IN SAP FLOW DYNAMICS AND HYDROLOGICAL NICHE OF DOMINANT SONORAN DESERT TREES ENABLE THEIR COEXISTENCE
Original language	Spanish
Pages (from-to)	995-1015
Number of pages	21
Journal	Botanical Sciences
Volume	101
Issue number	4
DOIs	https://doi.org/10.17129/botsci.3303
State	Published - Oct 2023

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© 2023 Sociedad Botanica de Mexico, A.C. All rights reserved.

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Martínez-Núñez, E., Castellanos, A. E., Basant, S., Ortega, C., Wilcox, B. P., Yépez, E. A., Rodríguez, J. C. Y., & Romo-León, J. R. (2023). DIFERENTES ESTRATEGIAS EN LAS DINÁMICAS DE FLUJO DE SAVIA Y NICHO HIDROLÓGICO DE ÁRBOLES DOMINANTES EN EL DESIERTO SONORENSE POSIBILITAN SU COEXISTENCIA. Botanical Sciences, 101(4), 995-1015. https://doi.org/10.17129/botsci.3303

@article{63d2e470f7e54efdb9d7af0870d72036,

title = "DIFERENTES ESTRATEGIAS EN LAS DIN{\'A}MICAS DE FLUJO DE SAVIA Y NICHO HIDROL{\'O}GICO DE {\'A}RBOLES DOMINANTES EN EL DESIERTO SONORENSE POSIBILITAN SU COEXISTENCIA",

abstract = "Background: Plants in arid ecosystems exhibit adaptive traits to periodic droughts. It is predicted that droughts will become more frequent and intense due to global change. Studying plant ecophysiological traits will help understand their adaptations to water limitations. In arid ecosystems of northwestern Mexico, evergreen and deciduous trees coexist, with little knowledge of their responsible hydrological functional traits. Questions: What are the differences in drought resistance and hydraulic traits for coexisting trees in a semi-arid community? Are we able to determine their coexistence mechanisms? Studied species: Olneya tesota, Ipomoea arborescens and Jatropha cordata. Study site and dates: Desert shrubland/subtropical shrubland community in central Sonora, Mexico, in 2021. Methods: Sap flux density (Fd) was measured continuously with heat dissipation method probes, and predawn (Ψpd), midday (Ψmd) water potentials and stomatal conductance (gs) during the summer wet season. Results: Olneya (evergreen) was found to maintain Fd throughout the year, but Ipomoea and Jatropha (deciduous) only during the wet summer season. The maximum Fd of Ipomoea and Jatropha (~1,200 g cm-2 day-1) were two times higher than Olneya (600 g cm-2 day-1). During dry spells, deciduous trees decreased their Fd. Water potentials and stomatal conductances allowed differentiation of the hydrologic niches of isohydric (Ipomoea and Jatropha) and anisohydric (O. tesota) functional types. Conclusions: We found a gradient of diminishing drought resistance from Ipomoea, Jatropha to Olneya. These species enhanced coexistence because of their hydrological niches, determined by their sap flow, iso-anisohydric strategies, and rooting depths.",

keywords = "Arid ecosystems, ecophysiological traits, iso-anisohydric strategies, sap flow, water potential",

author = "Enrique Mart{\'i}nez-N{\'u}{\~n}ez and Castellanos, {Alejandro E.} and Shishir Basant and Christian Ortega and Wilcox, {Brad P.} and Y{\'e}pez, {Enrico A.} and Rodr{\'i}guez, {Julio C.Y.} and Romo-Le{\'o}n, {Jos{\'e} R.}",

year = "2023",

month = oct,

doi = "10.17129/botsci.3303",

language = "Espa{\~n}ol",

volume = "101",

pages = "995--1015",

journal = "Botanical Sciences",

issn = "2007-4298",

publisher = "Sociedad Botanica de Mexico",

number = "4",

}

Martínez-Núñez, E, Castellanos, AE, Basant, S, Ortega, C, Wilcox, BP, Yépez, EA, Rodríguez, JCY & Romo-León, JR 2023, 'DIFERENTES ESTRATEGIAS EN LAS DINÁMICAS DE FLUJO DE SAVIA Y NICHO HIDROLÓGICO DE ÁRBOLES DOMINANTES EN EL DESIERTO SONORENSE POSIBILITAN SU COEXISTENCIA', Botanical Sciences, vol. 101, no. 4, pp. 995-1015. https://doi.org/10.17129/botsci.3303

TY - JOUR

T1 - DIFERENTES ESTRATEGIAS EN LAS DINÁMICAS DE FLUJO DE SAVIA Y NICHO HIDROLÓGICO DE ÁRBOLES DOMINANTES EN EL DESIERTO SONORENSE POSIBILITAN SU COEXISTENCIA

AU - Martínez-Núñez, Enrique

AU - Castellanos, Alejandro E.

AU - Basant, Shishir

AU - Ortega, Christian

AU - Wilcox, Brad P.

AU - Yépez, Enrico A.

AU - Rodríguez, Julio C.Y.

AU - Romo-León, José R.

PY - 2023/10

Y1 - 2023/10

N2 - Background: Plants in arid ecosystems exhibit adaptive traits to periodic droughts. It is predicted that droughts will become more frequent and intense due to global change. Studying plant ecophysiological traits will help understand their adaptations to water limitations. In arid ecosystems of northwestern Mexico, evergreen and deciduous trees coexist, with little knowledge of their responsible hydrological functional traits. Questions: What are the differences in drought resistance and hydraulic traits for coexisting trees in a semi-arid community? Are we able to determine their coexistence mechanisms? Studied species: Olneya tesota, Ipomoea arborescens and Jatropha cordata. Study site and dates: Desert shrubland/subtropical shrubland community in central Sonora, Mexico, in 2021. Methods: Sap flux density (Fd) was measured continuously with heat dissipation method probes, and predawn (Ψpd), midday (Ψmd) water potentials and stomatal conductance (gs) during the summer wet season. Results: Olneya (evergreen) was found to maintain Fd throughout the year, but Ipomoea and Jatropha (deciduous) only during the wet summer season. The maximum Fd of Ipomoea and Jatropha (~1,200 g cm-2 day-1) were two times higher than Olneya (600 g cm-2 day-1). During dry spells, deciduous trees decreased their Fd. Water potentials and stomatal conductances allowed differentiation of the hydrologic niches of isohydric (Ipomoea and Jatropha) and anisohydric (O. tesota) functional types. Conclusions: We found a gradient of diminishing drought resistance from Ipomoea, Jatropha to Olneya. These species enhanced coexistence because of their hydrological niches, determined by their sap flow, iso-anisohydric strategies, and rooting depths.

AB - Background: Plants in arid ecosystems exhibit adaptive traits to periodic droughts. It is predicted that droughts will become more frequent and intense due to global change. Studying plant ecophysiological traits will help understand their adaptations to water limitations. In arid ecosystems of northwestern Mexico, evergreen and deciduous trees coexist, with little knowledge of their responsible hydrological functional traits. Questions: What are the differences in drought resistance and hydraulic traits for coexisting trees in a semi-arid community? Are we able to determine their coexistence mechanisms? Studied species: Olneya tesota, Ipomoea arborescens and Jatropha cordata. Study site and dates: Desert shrubland/subtropical shrubland community in central Sonora, Mexico, in 2021. Methods: Sap flux density (Fd) was measured continuously with heat dissipation method probes, and predawn (Ψpd), midday (Ψmd) water potentials and stomatal conductance (gs) during the summer wet season. Results: Olneya (evergreen) was found to maintain Fd throughout the year, but Ipomoea and Jatropha (deciduous) only during the wet summer season. The maximum Fd of Ipomoea and Jatropha (~1,200 g cm-2 day-1) were two times higher than Olneya (600 g cm-2 day-1). During dry spells, deciduous trees decreased their Fd. Water potentials and stomatal conductances allowed differentiation of the hydrologic niches of isohydric (Ipomoea and Jatropha) and anisohydric (O. tesota) functional types. Conclusions: We found a gradient of diminishing drought resistance from Ipomoea, Jatropha to Olneya. These species enhanced coexistence because of their hydrological niches, determined by their sap flow, iso-anisohydric strategies, and rooting depths.

KW - Arid ecosystems

KW - ecophysiological traits

KW - iso-anisohydric strategies

KW - sap flow

KW - water potential

UR - http://www.scopus.com/inward/record.url?scp=85175717661&partnerID=8YFLogxK

U2 - 10.17129/botsci.3303

DO - 10.17129/botsci.3303

M3 - Artículo

AN - SCOPUS:85175717661

SN - 2007-4298

VL - 101

SP - 995

EP - 1015

JO - Botanical Sciences

JF - Botanical Sciences

IS - 4

ER -

DIFERENTES ESTRATEGIAS EN LAS DINÁMICAS DE FLUJO DE SAVIA Y NICHO HIDROLÓGICO DE ÁRBOLES DOMINANTES EN EL DESIERTO SONORENSE POSIBILITAN SU COEXISTENCIA

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