How Nitrogen and Phosphorus Availability Change Water Use Efficiency in a Mediterranean Savanna Ecosystem
21 Pág. Departamento de Medio Ambiente y Agronomía
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| Format: | artículo biblioteca |
| Language: | English |
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John Wiley & Sons
2021-04-04
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| Subjects: | Eddy covariance, MANIP, Nutrient availability, Stoichiometric imbalance, Transpiration, Water use efficiency, |
| Online Access: | http://hdl.handle.net/10261/285318 http://dx.doi.org/10.13039/501100014181 http://dx.doi.org/10.13039/501100003329 http://dx.doi.org/10.13039/501100002946 https://api.elsevier.com/content/abstract/scopus_id/85107003271 |
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Eddy covariance MANIP Nutrient availability Stoichiometric imbalance Transpiration Water use efficiency Eddy covariance MANIP Nutrient availability Stoichiometric imbalance Transpiration Water use efficiency |
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Eddy covariance MANIP Nutrient availability Stoichiometric imbalance Transpiration Water use efficiency Eddy covariance MANIP Nutrient availability Stoichiometric imbalance Transpiration Water use efficiency El-Madany, Tarek S. Reichstein, Markus Carrara, Arnaud Martín, M. Pilar Moreno, Gerardo Gonzalez-Cascon, Rosario Peñuelas, Josep Ellsworth, David S. Burchard-Levine, Vicente Hammer, Tiana W. Knauer, Jürgen Kolle, Olaf Luo, Yunpeng Pacheco-Labrador, Javier Nelson, Jacob A. Perez-Priego, Oscar Rolo, Victor Wutzler, Thomas Migliavacca, Mirco How Nitrogen and Phosphorus Availability Change Water Use Efficiency in a Mediterranean Savanna Ecosystem |
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21 Pág.
Departamento de Medio Ambiente y Agronomía |
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Ministerio de Economía y Competitividad (España) |
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Ministerio de Economía y Competitividad (España) El-Madany, Tarek S. Reichstein, Markus Carrara, Arnaud Martín, M. Pilar Moreno, Gerardo Gonzalez-Cascon, Rosario Peñuelas, Josep Ellsworth, David S. Burchard-Levine, Vicente Hammer, Tiana W. Knauer, Jürgen Kolle, Olaf Luo, Yunpeng Pacheco-Labrador, Javier Nelson, Jacob A. Perez-Priego, Oscar Rolo, Victor Wutzler, Thomas Migliavacca, Mirco |
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artículo |
| topic_facet |
Eddy covariance MANIP Nutrient availability Stoichiometric imbalance Transpiration Water use efficiency |
| author |
El-Madany, Tarek S. Reichstein, Markus Carrara, Arnaud Martín, M. Pilar Moreno, Gerardo Gonzalez-Cascon, Rosario Peñuelas, Josep Ellsworth, David S. Burchard-Levine, Vicente Hammer, Tiana W. Knauer, Jürgen Kolle, Olaf Luo, Yunpeng Pacheco-Labrador, Javier Nelson, Jacob A. Perez-Priego, Oscar Rolo, Victor Wutzler, Thomas Migliavacca, Mirco |
| author_sort |
El-Madany, Tarek S. |
| title |
How Nitrogen and Phosphorus Availability Change Water Use Efficiency in a Mediterranean Savanna Ecosystem |
| title_short |
How Nitrogen and Phosphorus Availability Change Water Use Efficiency in a Mediterranean Savanna Ecosystem |
| title_full |
How Nitrogen and Phosphorus Availability Change Water Use Efficiency in a Mediterranean Savanna Ecosystem |
| title_fullStr |
How Nitrogen and Phosphorus Availability Change Water Use Efficiency in a Mediterranean Savanna Ecosystem |
| title_full_unstemmed |
How Nitrogen and Phosphorus Availability Change Water Use Efficiency in a Mediterranean Savanna Ecosystem |
| title_sort |
how nitrogen and phosphorus availability change water use efficiency in a mediterranean savanna ecosystem |
| publisher |
John Wiley & Sons |
| publishDate |
2021-04-04 |
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http://hdl.handle.net/10261/285318 http://dx.doi.org/10.13039/501100014181 http://dx.doi.org/10.13039/501100003329 http://dx.doi.org/10.13039/501100002946 https://api.elsevier.com/content/abstract/scopus_id/85107003271 |
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dig-inia-es-10261-2853182023-02-04T21:53:15Z How Nitrogen and Phosphorus Availability Change Water Use Efficiency in a Mediterranean Savanna Ecosystem El-Madany, Tarek S. Reichstein, Markus Carrara, Arnaud Martín, M. Pilar Moreno, Gerardo Gonzalez-Cascon, Rosario Peñuelas, Josep Ellsworth, David S. Burchard-Levine, Vicente Hammer, Tiana W. Knauer, Jürgen Kolle, Olaf Luo, Yunpeng Pacheco-Labrador, Javier Nelson, Jacob A. Perez-Priego, Oscar Rolo, Victor Wutzler, Thomas Migliavacca, Mirco Ministerio de Economía y Competitividad (España) German Centre for Air and Space Travel Junta de Extremadura El-Madany, Tarek S. [0000-0002-0726-7141] Reichstein, Markus [0000-0001-5736-1112] Carrara, Arnaud [0000-0002-9095-8807] Martín, M. Pilar [0000-0002-5563-8461] Moreno, Gerardo [0000-0001-8053-2696] Gonzalez-Cascon, Rosario [0000-0003-3468-0967] Peñuelas, Josep [0000-0002-7215-0150] Ellsworth, David S.[0000-0002-9699-2272] Burchard-Levine, Vicente [0000-0003-0222-8706] Knauer, Jürgen [0000-0002-4947-7067] Kolle, Olaf [0000-0002-7373-7519] Pacheco-Labrador, Javier [0000-0003-3401-7081] Nelson, Jacob A. [0000-0002-4663-2420] Perez-Priego, Oscar [0000-0002-3138-3177] Rolo, Victor [0000-0001-5854-9512] Wutzler, Thomas [0000-0003-4159-5445] Migliavacca, Mirco [0000-0003-3546-8407] Eddy covariance MANIP Nutrient availability Stoichiometric imbalance Transpiration Water use efficiency 21 Pág. Departamento de Medio Ambiente y Agronomía Nutrient availability, especially of nitrogen (N) and phosphorus (P), is of major importance for every organism and at a larger scale for ecosystem functioning and productivity. Changes in nutrient availability and potential stoichiometric imbalance due to anthropogenic nitrogen deposition might lead to nutrient deficiency or alter ecosystem functioning in various ways. In this study, we present 6 years (2014–2020) of flux-, plant-, and remote sensing data from a large-scale nutrient manipulation experiment conducted in a Mediterranean savanna-type ecosystem with an emphasis on the effects of N and P treatments on ecosystem-scale water-use efficiency (WUE) and related mechanisms. Two plots were fertilized with N (NT, 16.9 Ha) and N + P (NPT, 21.5 Ha), and a third unfertilized plot served as a control (CT). Fertilization had a strong impact on leaf nutrient stoichiometry only within the herbaceous layer with increased leaf N in both fertilized treatments and increased leaf P in NPT. Following fertilization, WUE in NT and NPT increased during the peak of growing season. While gross primary productivity similarly increased in NT and NPT, transpiration and surface conductance increased more in NT than in NPT. The results show that the NPT plot with higher nutrient availability, but more balanced N:P leaf stoichiometry had the highest WUE. On average, higher N availability resulted in a 40% increased leaf area index (LAI) in both fertilized treatments in the spring. Increased LAI reduced aerodynamic conductance and thus evaporation at both fertilized plots in the spring. Despite reduced evaporation, annual evapotranspiration increased by 10% (48.6 ± 28.3 kg H2O m−2), in the NT plot, while NPT remained similar to CT (−1%, −6.7 ± 12.2 kgH2O m−2). Potential causes for increased transpiration at NT could be increased root biomass and thus higher water uptake or rhizosphere priming to increase P-mobilization through microbes. The annual net ecosystem exchange shifted from a carbon source in CT (75.0 ± 20.6 gC m−2) to carbon-neutral in both fertilized treatments [−7.0 ± 18.5 gC m−2 (NT) 0.4 ± 22.6 gC m−2 (NPT)]. Our results show, that the N:P stoichiometric imbalance, resulting from N addition (without P), increases the WUE less than the addition of N + P, due to the strong increase in transpiration at NT, which indicates the importance of a balanced N and P content for WUE. The authors thank Martin Hertel, Kathrin Henkel, Ramón López‐Jimenez, Yonatan Cáceres and Enrique Juarez for support during fieldwork and site maintenance. Tarek S. El‐Madany, Javier Pacheco‐Labrador, Mirco Migliavacca, Markus Reichstein and Oscar Perez‐Priego thank the Alexander von Humboldt Stiftung for financial support of the MaNiP project, M. Pilar Martín and Vicente Burchard‐Levine thank the Spanish Ministry of Economy and Competitiveness for financing the flights with hyperspectral imagery through the FLUXPEC project (CGL2012‐34383) and Synergy (CGL2015‐G9095‐R), and Javier Pacheco‐Labrador and Mirco Migliavacca acknowledge the German Aerospace Center (DLR) and the German Federal Ministry of Economic Affairs and Energy that provided support within the framework of the EnMAP project (Contract No. 50EE1621). Victor Rolo was funded by a “” fellowship (TA18022) funded by the regional government of Extremadura (Spain). Talento Peer reviewed 2022-12-20T12:56:40Z 2022-12-20T12:56:40Z 2021-04-04 artículo Journal of Geophysical Research: Biogeosciences 126(5): e2020JG006005 (2021) 2169-8953 http://hdl.handle.net/10261/285318 10.1029/2020JG006005 2169-8961 http://dx.doi.org/10.13039/501100014181 http://dx.doi.org/10.13039/501100003329 http://dx.doi.org/10.13039/501100002946 2-s2.0-85107003271 https://api.elsevier.com/content/abstract/scopus_id/85107003271 en #PLACEHOLDER_PARENT_METADATA_VALUE# #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/MINECO/ FLUXPEC/CGL2012‐34383 info:eu-repo/grantAgreement/MINECO/Synergy/CGL2015‐G9095‐R Journal of Geophysical Research: Biogeosciences Publisher's version https://doi.org/10.1029/2020JG006005 Sí open John Wiley & Sons |