Water economy of woody species from the Patagonian steppes
The vegetation of the Patagonian steppe is exposed to low soil water and nutrient availability, low temperatures and strong and frequent winds. These factors determine the structure and functioning of the steppe and influence the morpho-physiological traits of species. This review emphasizes the eff...
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2011
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03275477_v21_n1_p43_Bucci http://hdl.handle.net/20.500.12110/paper_03275477_v21_n1_p43_Bucci |
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paper:paper_03275477_v21_n1_p43_Bucci2023-06-08T15:33:20Z Water economy of woody species from the Patagonian steppes Bucci, Sandra Janet Scholz, Fabián Gustavo Goldstein, Guillermo Hernan Hydraulic efficiency Patagonia occidental district Rooting depth Soil and leaf water potential Soil water content Wood density ecomorphology ecosystem function growth response hydraulic conductivity low temperature nutrient availability photosynthesis physiology plant architecture plant water relations precipitation assessment root system shrub soil water soil water potential spatiotemporal analysis steppe vegetation structure water uptake water use efficiency wind profile woody plant Patagonia Berberis Berberis heterophylla Mulinum spinosum Schinus Senecio Senecio filaginoides The vegetation of the Patagonian steppe is exposed to low soil water and nutrient availability, low temperatures and strong and frequent winds. These factors determine the structure and functioning of the steppe and influence the morpho-physiological traits of species. This review emphasizes the effects of soil water spatial-temporal dynamics on plant water status and on the hydraulic architecture of 10 woody species with rooting depths ranging from 50 to 200 cm. Soil water availability in the Patagonian steppe increases with depth and with increasing rainfall during the winter. Species with deep roots exploring dependable soil water sources such as Schinus johnstonii Barkley and Berberis heterophylla Jussieu Lam have less negative minimum leaf water potentials and lower water transport efficiency (low specific hydraulic conductivity) than species with shallow root systems such as Senecio filaginoides De Candolle and Mulinum spinosum (Cav.) Pers. Hydraulic characteristics of species with deep roots taping deeper water sources could limit the response to summer rainfall pulses. Despite that intrisic and time-integrated water use efficiency and leafmass- based photosynthesis rates are highest in species with deep root systems, their low hydraulic capacity, dense wood, and large soil-to-leaf water potential gradients, suggest that these species have relatively low growth rates which can be sustained over relatively long periods. Questions for future studies are suggested, including why species with deep roots are only using a portion of the water resources of moist soil layers. Fil:Bucci, S.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Scholz, F.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Goldstein, G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2011 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03275477_v21_n1_p43_Bucci http://hdl.handle.net/20.500.12110/paper_03275477_v21_n1_p43_Bucci |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Hydraulic efficiency Patagonia occidental district Rooting depth Soil and leaf water potential Soil water content Wood density ecomorphology ecosystem function growth response hydraulic conductivity low temperature nutrient availability photosynthesis physiology plant architecture plant water relations precipitation assessment root system shrub soil water soil water potential spatiotemporal analysis steppe vegetation structure water uptake water use efficiency wind profile woody plant Patagonia Berberis Berberis heterophylla Mulinum spinosum Schinus Senecio Senecio filaginoides |
| spellingShingle |
Hydraulic efficiency Patagonia occidental district Rooting depth Soil and leaf water potential Soil water content Wood density ecomorphology ecosystem function growth response hydraulic conductivity low temperature nutrient availability photosynthesis physiology plant architecture plant water relations precipitation assessment root system shrub soil water soil water potential spatiotemporal analysis steppe vegetation structure water uptake water use efficiency wind profile woody plant Patagonia Berberis Berberis heterophylla Mulinum spinosum Schinus Senecio Senecio filaginoides Bucci, Sandra Janet Scholz, Fabián Gustavo Goldstein, Guillermo Hernan Water economy of woody species from the Patagonian steppes |
| topic_facet |
Hydraulic efficiency Patagonia occidental district Rooting depth Soil and leaf water potential Soil water content Wood density ecomorphology ecosystem function growth response hydraulic conductivity low temperature nutrient availability photosynthesis physiology plant architecture plant water relations precipitation assessment root system shrub soil water soil water potential spatiotemporal analysis steppe vegetation structure water uptake water use efficiency wind profile woody plant Patagonia Berberis Berberis heterophylla Mulinum spinosum Schinus Senecio Senecio filaginoides |
| description |
The vegetation of the Patagonian steppe is exposed to low soil water and nutrient availability, low temperatures and strong and frequent winds. These factors determine the structure and functioning of the steppe and influence the morpho-physiological traits of species. This review emphasizes the effects of soil water spatial-temporal dynamics on plant water status and on the hydraulic architecture of 10 woody species with rooting depths ranging from 50 to 200 cm. Soil water availability in the Patagonian steppe increases with depth and with increasing rainfall during the winter. Species with deep roots exploring dependable soil water sources such as Schinus johnstonii Barkley and Berberis heterophylla Jussieu Lam have less negative minimum leaf water potentials and lower water transport efficiency (low specific hydraulic conductivity) than species with shallow root systems such as Senecio filaginoides De Candolle and Mulinum spinosum (Cav.) Pers. Hydraulic characteristics of species with deep roots taping deeper water sources could limit the response to summer rainfall pulses. Despite that intrisic and time-integrated water use efficiency and leafmass- based photosynthesis rates are highest in species with deep root systems, their low hydraulic capacity, dense wood, and large soil-to-leaf water potential gradients, suggest that these species have relatively low growth rates which can be sustained over relatively long periods. Questions for future studies are suggested, including why species with deep roots are only using a portion of the water resources of moist soil layers. |
| author |
Bucci, Sandra Janet Scholz, Fabián Gustavo Goldstein, Guillermo Hernan |
| author_facet |
Bucci, Sandra Janet Scholz, Fabián Gustavo Goldstein, Guillermo Hernan |
| author_sort |
Bucci, Sandra Janet |
| title |
Water economy of woody species from the Patagonian steppes |
| title_short |
Water economy of woody species from the Patagonian steppes |
| title_full |
Water economy of woody species from the Patagonian steppes |
| title_fullStr |
Water economy of woody species from the Patagonian steppes |
| title_full_unstemmed |
Water economy of woody species from the Patagonian steppes |
| title_sort |
water economy of woody species from the patagonian steppes |
| publishDate |
2011 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03275477_v21_n1_p43_Bucci http://hdl.handle.net/20.500.12110/paper_03275477_v21_n1_p43_Bucci |
| work_keys_str_mv |
AT buccisandrajanet watereconomyofwoodyspeciesfromthepatagoniansteppes AT scholzfabiangustavo watereconomyofwoodyspeciesfromthepatagoniansteppes AT goldsteinguillermohernan watereconomyofwoodyspeciesfromthepatagoniansteppes |
| _version_ |
1768544686973124608 |