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dc.contributor.author
Bucci, Sandra Janet  
dc.contributor.author
Scholz, Fabian Gustavo  
dc.contributor.author
Goldstein, Guillermo Hernan  
dc.contributor.author
Meinzer, Frederick C.  
dc.contributor.author
Arce, Maria Elena  
dc.date.available
2020-01-09T20:44:40Z  
dc.date.issued
2009-07  
dc.identifier.citation
Bucci, Sandra Janet; Scholz, Fabian Gustavo; Goldstein, Guillermo Hernan; Meinzer, Frederick C.; Arce, Maria Elena; Soil water availability and rooting depth as determinants of hydraulic architecture of Patagonian woody species; Springer; Oecologia; 160; 4; 7-2009; 631-641  
dc.identifier.issn
0029-8549  
dc.identifier.uri
http://hdl.handle.net/11336/94244  
dc.description.abstract
Adaptations of species to capture limiting resources is central for understanding structure and function of ecosystems. We studied the water economy of nine woody species differing in rooting depth in a Patagonian shrub steppe from southern Argentina to understand how soil water availability and rooting depth determine their hydraulic architecture. Soil water content and potentials, leaf water potentials (ΨLeaf), hydraulic conductivity, wood density (ρw), rooting depth, and specific leaf area (SLA) were measured during two summers. Water potentials in the upper soil layers during a summer drought ranged from -2.3 to -3.6 MPa, increasing to -0.05 MPa below 150 cm. Predawn ΨLeaf was used as a surrogate of weighted mean soil water potential because no statistical differences in ΨLeaf were observed between exposed and covered leaves. Species-specific differences in predawn ΨLeaf were consistent with rooting depths. Predawn ΨLeaf ranged from -4.0 MPa for shallow rooted shrubs to -1.0 MPa for deep-rooted shrubs, suggesting that the roots of the latter have access to abundant moisture, whereas shallow-rooted shrubs are adapted to use water deposited mainly by small rainfall events. Wood density was a good predictor of hydraulic conductivity and SLA. Overall, we found that shallow rooted species had efficient water transport in terms of high specific and leaf specific hydraulic conductivity, low ρw, high SLA and a low minimum ΨLeaf that exhibited strong seasonal changes, whereas deeply rooted shrubs maintained similar minimum ΨLeaf throughout the year, had stems with high ρw and low hydraulic conductivity and leaves with low SLA. These two hydraulic syndromes were the extremes of a continuum with several species occupying different portions of a gradient in hydraulic characteristics. It appears that the marginal cost of having an extensive root system (e.g., high ρw and root hydraulic resistance) contributes to low growth rates of the deeply rooted species.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Springer  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
ARID VEGETATION  
dc.subject
HYDRAULIC CONDUCTIVITY  
dc.subject
LEAF WATER POTENTIAL  
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ROOT DEPTH  
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WOOD DENSITY  
dc.subject.classification
Ecología  
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Ciencias Biológicas  
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CIENCIAS NATURALES Y EXACTAS  
dc.title
Soil water availability and rooting depth as determinants of hydraulic architecture of Patagonian woody species  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2019-11-25T18:03:17Z  
dc.journal.volume
160  
dc.journal.number
4  
dc.journal.pagination
631-641  
dc.journal.pais
Alemania  
dc.description.fil
Fil: Bucci, Sandra Janet. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco"; Argentina  
dc.description.fil
Fil: Scholz, Fabian Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco"; Argentina  
dc.description.fil
Fil: Goldstein, Guillermo Hernan. Universidad de Buenos Aires; Argentina. University of Miami; Estados Unidos. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina  
dc.description.fil
Fil: Meinzer, Frederick C.. United States Department of Agriculture; Estados Unidos  
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Fil: Arce, Maria Elena. Universidad Nacional de la Patagonia "San Juan Bosco"; Argentina  
dc.journal.title
Oecologia  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1007/s00442-009-1331-z  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007%2Fs00442-009-1331-z  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.fs.usda.gov/pnw/pubs/journals/pnw_2009_bucci001.pdf