14 results on '"Medlyn B.E."'
Search Results
2. Multiple measurements constrain estimates of net carbon exchange by a Eucalyptus forest
- Author
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Keith, H., Leuning, R., Jacobsen, K.L., Cleugh, H.A., van Gorsel, E., Raison, R.J., Medlyn, B.E., Winters, A., and Keitel, C.
- Published
- 2009
- Full Text
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3. Low sensitivity of gross primary production to elevated CO2 in a mature eucalypt woodland
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Yang, J., Medlyn, B.E., De, Kauwe, M.G., Duursma, R.A., Jiang, M., Kumarathunge, D., Crous, K.Y., Gimeno, T.E., Wujeska-Klause, A., and Ellsworth, D.S.
- Abstract
The response of mature forest ecosystems to a rising atmospheric carbon dioxide concentration (span classCombining double low line"inline-formula"iC/ia/span) is a major uncertainty in projecting the future trajectory of the Earth's climate. Although leaf-level net photosynthesis is typically stimulated by exposure to elevated span classCombining double low line"inline-formula"iC/ia/span (espan classCombining double low line"inline-formula"iC/ia/span), it is unclear how this stimulation translates into carbon cycle responses at the ecosystem scale. Here we estimate a key component of the carbon cycle, the gross primary productivity (GPP), of a mature native eucalypt forest exposed to free-air span classCombining double low line"inline-formula"CO2/span enrichment (the EucFACE experiment). In this experiment, light-saturated leaf photosynthesis increased by 19andthinsp;% in response to a 38andthinsp;% increase in span classCombining double low line"inline-formula"iC/ia/span. We used the process-based forest canopy model, MAESPA, to upscale these leaf-level measurements of photosynthesis with canopy structure to estimate the GPP and its response to espan classCombining double low line"inline-formula"iC/ia/span. We assessed the direct impact of espan classCombining double low line"inline-formula"iC/ia/span, as well as the indirect effect of photosynthetic acclimation to espan classCombining double low line"inline-formula"iC/ia/span and variability among treatment plots using different model scenarios./p At the canopy scale, MAESPA estimated a GPP of 1574andthinsp;gandthinsp;Candthinsp;mspan classCombining double low line"inline-formula"-2/spanandthinsp;yrspan classCombining double low line"inline-formula"-1/span under ambient conditions across 4 years and a direct increase in the GPP of span classCombining double low line"inline-formula"+/span11andthinsp;% in response to espan classCombining double low line"inline-formula"iC/ia/span. The smaller canopy-scale response simulated by the model, as compared with the leaf-level response, could be attributed to the prevalence of RuBP regeneration limitation of leaf photosynthesis within the canopy. Photosynthetic acclimation reduced this estimated response to 10andthinsp;%. After taking the baseline variability in the leaf area index across plots in account, we estimated a field GPP response to espan classCombining double low line"inline-formula"iC/ia/span of 6andthinsp;% with a 95andthinsp;% confidence interval (span classCombining double low line"inline-formula"-/span2andthinsp;%, 14andthinsp;%). These findings highlight that the GPP response of mature forests to espan classCombining double low line"inline-formula"iC/ia/span is likely to be considerably lower than the response of light-saturated leaf photosynthesis. Our results provide an important context for interpreting the espan classCombining double low line"inline-formula"iC/ia/span responses of other components of the ecosystem carbon cycle. © Author(s) 2020. Martin G. De Kauwe was supported by the NSW Research Attraction and Acceleration Program (RAAP). Euc-FACE was built as an initiative of the Australian Government as part of the Nation Building Economic Stimulus Plan and is supported by the Australian Commonwealth in collaboration with Western Sydney University.
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- 2020
4. Mechanisms of recovery from drought stress in Eucalyptus saligna: refilling or growth of new xylem?
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Gauthey, A., Peters, J.M.R., Carins Murphy, Madeline R., Rodríguez Domínguez, Celia M., Tissue, D.T., Medlyn, B.E, Brodribb, Timothy J., and Choat, B.
- Abstract
Póster presentado en el XIM4 4th Xylem International Meeting Padua, 25-27 September 2019
- Published
- 2019
5. The fate of carbon in a mature forest under carbon dioxide enrichment
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Jiang, M., primary, Medlyn, B.E., additional, Drake, J.E., additional, Duursma, R.A., additional, Anderson, I.C., additional, Barton, C.V.M., additional, Boer, M.M., additional, Carrillo, Y., additional, Castañeda-Gómez, L., additional, Collins, L., additional, Crous, K.Y., additional, De Kauwe, M.G., additional, Emmerson, K.M., additional, Facey, S.L., additional, Gherlenda, A.N., additional, Gimeno, T.E., additional, Hasegawa, S., additional, Johnson, S.N., additional, Macdonald, C.A., additional, Mahmud, K., additional, Moore, B.D., additional, Nazaries, L., additional, Nielsen, U.N., additional, Noh, N.J., additional, Ochoa-Hueso, R., additional, Pathare, V.S., additional, Pendall, E., additional, Pineiro, J., additional, Powell, J.R., additional, Power, S.A., additional, Reich, P.B., additional, Renchon, A.A., additional, Riegler, M., additional, Rymer, P., additional, Salomón, R.L., additional, Singh, B.K., additional, Smith, B., additional, Tjoelker, M.G., additional, Walker, J.K.M., additional, Wujeska-Klause, A., additional, Yang, J., additional, Zaehle, S., additional, and Ellsworth, D.S., additional
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- 2019
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6. Global variability in leaf respiration in relation to climate, plant functional types and leaf traits
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Atkin, O.K. Bloomfield, K.J. Reich, P.B. Tjoelker, M.G. Asner, G.P. Bonal, D. Bönisch, G. Bradford, M.G. Cernusak, L.A. Cosio, E.G. Creek, D. Crous, K.Y. Domingues, T.F. Dukes, J.S. Egerton, J.J.G. Evans, J.R. Farquhar, G.D. Fyllas, N.M. Gauthier, P.P.G. Gloor, E. Gimeno, T.E. Griffin, K.L. Guerrieri, R. Heskel, M.A. Huntingford, C. Ishida, F.Y. Kattge, J. Lambers, H. Liddell, M.J. Lloyd, J. Lusk, C.H. Martin, R.E. Maksimov, A.P. Maximov, T.C. Malhi, Y. Medlyn, B.E. Meir, P. Mercado, L.M. Mirotchnick, N. Ng, D. Niinemets, U. O'Sullivan, O.S. Phillips, O.L. Poorter, L. Poot, P. Prentice, I.C. Salinas, N. Rowland, L.M. Ryan, M.G. Sitch, S. Slot, M. Smith, N.G. Turnbull, M.H. Vanderwel, M.C. Valladares, F. Veneklaas, E.J. Weerasinghe, L.K. Wirth, C. Wright, I.J. Wythers, K.R. Xiang, J. Xiang, S. Zaragoza-Castells, J.
- Abstract
Summary: Leaf dark respiration (R dark ) is an important yet poorly quantified component of the global carbon cycle. Given this, we analyzed a new global database of R dark and associated leaf traits. Data for 899 species were compiled from 100 sites (from the Arctic to the tropics). Several woody and nonwoody plant functional types (PFTs) were represented. Mixed-effects models were used to disentangle sources of variation in R dark . Area-based R dark at the prevailing average daily growth temperature (T) of each site increased only twofold from the Arctic to the tropics, despite a 20°C increase in growing T (8-28°C). By contrast, R dark at a standard T (25°C, R dark 25 ) was threefold higher in the Arctic than in the tropics, and twofold higher at arid than at mesic sites. Species and PFTs at cold sites exhibited higher R dark 25 at a given photosynthetic capacity (V cmax 25 ) or leaf nitrogen concentration ([N]) than species at warmer sites. R dark 25 values at any given V cmax 25 or [N] were higher in herbs than in woody plants. The results highlight variation in R dark among species and across global gradients in T and aridity. In addition to their ecological significance, the results provide a framework for improving representation of R dark in terrestrial biosphere models (TBMs) and associated land-surface components of Earth system models (ESMs). © 2015 New Phytologist Trust.
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- 2015
7. TRY - a global database of plant traits
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Kattge, J., Diaz, S., Lavorel, S., Prentices, I.C., Leadley, P., Bönisch, G., Garnier, E., Westobys, M., Reich, P.B., Wrights, I.J., Cornelissen, C., Violle, C., Harisson, S.P., van Bodegom, P.M., Reichstein, M., Enquist, B.J., Soudzilovskaia, N.A., Ackerly, D.D., Anand, M., Atkin, O., Bahn, M., Baker, T.R., Baldochi, D., Bekker, R., Blanco, C.C., Blonders, B., Bond, W.J., Bradstock, R., Bunker, D.E., Casanoves, F., Cavender-Bares, J., Chambers, J.Q., Chapin III, F.S., Chave, J., Coomes, D., Cornwell, W.K., Craine, J.M., Dobrin, B.H., Duarte, L., Durka, W., Elser, J., Esser, G., Estiarte, M., Fagan, W.F., Fang, J., Fernadez-Mendez, F., Fidelis, A., Finegan, B., Flores, O., Ford, H., Frank, D., Freschet, T., Fyllas, N.M., Gallagher, R.V., Green, W.A., Gutierrez, A.G., Hickler, T., Higgins, S.I., Hodgson, J.G., Jalili, A., Jansen, S., Joly, C.A., Kerkhoff, A.J., Kirkup, D., Kitajima, K., Kleyer, M., Klotz, S., Knops, J.M.H., Kramer, K., Kühn, I., Kurokawa, H., Laughlin, D., Lee, T.D., Leishman, M., Lens, F., Lewis, S.L., Lloyd, J., Llusia, J., Louault, F., Ma, S., Mahecha, M.D., Manning, P., Massad, T., Medlyn, B.E., Messier, J., Moles, A.T., Müller, S.C., Nadrowski, K., Naeem, S., Niinemets, Ü., Nöllert, S., Nüske, A., Ogaya, R., Oleksyn, J., Onipchenko, V.G., Onoda, Y., Ordonez Barragan, J.C., Ozinga, W.A., and Poorter, L.
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litter decomposition rates ,hawaiian metrosideros-polymorpha ,leaf economics spectrum ,relative growth-rate ,PE&RC ,Law Group ,Forest Ecology and Forest Management ,Centrum Ecosystemen ,tropical rain-forest ,Centre for Ecosystem Studies ,CE - Vegetation and Landscape Ecology ,Recht ,terrestrial biosphere ,wide-range ,Bosecologie en Bosbeheer ,sub-arctic flora ,Wageningen Environmental Research ,functional traits ,old-field succession - Abstract
Plant traits – the morphological, anatomical, physiological, biochemical and phenological characteristics of plants and their organs – determine how primary producers respond to environmental factors, affect other trophic levels, influence ecosystem processes and services and provide a link from species richness to ecosystem functional diversity. Trait data thus represent the raw material for a wide range of research from evolutionary biology, community and functional ecology to biogeography. Here we present the global database initiative named TRY, which has united a wide range of the plant trait research community worldwide and gained an unprecedented buy-in of trait data: so far 93 trait databases have been contributed. The data repository currently contains almost three million trait entries for 69 000 out of the world's 300 000 plant species, with a focus on 52 groups of traits characterizing the vegetative and regeneration stages of the plant life cycle, including growth, dispersal, establishment and persistence. A first data analysis shows that most plant traits are approximately log-normally distributed, with widely differing ranges of variation across traits. Most trait variation is between species (interspecific), but significant intraspecific variation is also documented, up to 40% of the overall variation. Plant functional types (PFTs), as commonly used in vegetation models, capture a substantial fraction of the observed variation – but for several traits most variation occurs within PFTs, up to 75% of the overall variation. In the context of vegetation models these traits would better be represented by state variables rather than fixed parameter values. The improved availability of plant trait data in the unified global database is expected to support a paradigm shift from species to trait-based ecology, offer new opportunities for synthetic plant trait research and enable a more realistic and empirically grounded representation of terrestrial vegetation in Earth system models.
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- 2011
8. Temperature response of parameters of a biochemically based model of photosynthesis. I. Seasonal changes in mature maritime pine (Pinus pinaster Ait.)
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Medlyn, B.E., Loustau, Denis, Delzon, Sylvain, Unité de recherches forestières (BORDX PIERR UR ), Institut National de la Recherche Agronomique (INRA), and ProdInra, Migration
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[SDV.EE]Life Sciences [q-bio]/Ecology, environment ,[SDV.EE] Life Sciences [q-bio]/Ecology, environment ,PIN MARITIME ,RIBULOSE-BIPHOSPHATE CARBOXYLASE ,ComputingMilieux_MISCELLANEOUS - Abstract
International audience
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- 2002
9. Effects of elevated <tex>CO_{2}$</tex> on photosynthesis in European forest species: a meta-analysis of model parameters
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Medlyn, B.E., Badeck, F.W., de Pury, D.G.G., Barton, C.V.M., Broadmeadow, M., Ceulemans, Reinhart, de Angelis, P., Forstreuter, M., Jach, M.E., Kellomäki, S., Laitat, E., Marek, M., Philippot, S., Rey, A., Strassemeyer, J., Laitinen, K., Liozon, R., Portier, B., Roberntz, P., Wang, K., and Jarvis, P.G.
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- 1999
10. MAESPA: a model to study interactions between water limitation, environmental drivers and vegetation function at tree and stand levels, with an example application to [CO2] × drought interactions
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Duursma, R. A., primary and Medlyn, B.E., additional
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- 2012
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11. Stomatal conductance of forest species after long-term exposure to elevated CO[sub2] concentration: a synthesis.
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Medlyn, B.E., Barton, C.V.M., Broadmeadow, M.S.J., Ceulemans, R., De Angelis, P., Forstreuter, M., Freeman, M., Jackson, S.B., Kellimäki, S., Laitat, E., Rey, A., Roberntz, P., Sigurdsson, B.D., Strassemeyer, J., Wang, K., Curtis, P.S., and Jarvis, P.G.
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CARBON dioxide , *STOMATA , *TREES , *ATMOSPHERIC carbon dioxide - Abstract
Examines the effects of elevated carbon dioxide concentration on stomal conductance of forest trees in Europe. Application of meta-analysis; Decrease in stomal conductance in response to growth in elevated carbon dioxide; Comparison of carbon dioxide reponse between younger and older trees.
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- 2001
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12. Mechanisms of xylem hydraulic recovery after drought in Eucalyptus saligna
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Celia M. Rodriguez-Dominguez, Jennifer M. R. Peters, Rosana López, Belinda E. Medlyn, Timothy J. Brodribb, Brendan Choat, Madeline R. Carins Murphy, David T. Tissue, Alice Gauthey, European Commission, Department of Energy (US), Oak Ridge National Laboratory (US), Australian Research Council, Peters, J.M.R., López, Rosana, Carins Murphy, Madeline R., Rodríguez Domínguez, Celia M., Tissue, D.T., Medlyn, B.E, Brodribb, Timothy J., Choat, B., Peters, J.M.R. [0000-0003-4627-7788], López, Rosana [0000-0003-3553-9148], Carins Murphy, Madeline R. [0000-0003-4370-9485], Rodríguez Domínguez, Celia M. [0000-0003-2352-0829], Tissue, D.T. [0000-0002-8497-2047], Medlyn, B.E [0000-0001-5728-9827], Brodribb, Timothy J. [0000-0002-4964-6107], and Choat, B.[0000-0002-9105-640X]
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Canopy ,Drought stress ,Eucalyptus ,Eucalyptus saligna ,biology ,Physiology ,fungi ,food and beverages ,Xylem ,Water ,X-Ray Microtomography ,Plant Science ,biology.organism_classification ,medicine.disease ,Droughts ,Plant Leaves ,Horticulture ,Embolism ,Xylem transpor ,Water relations ,medicine ,Woody plant ,Transpiration - Abstract
13 páginas.- 7 figuras.- 92 referencias, The mechanisms by which woody plants recover xylem hydraulic capacity after drought stress are not well understood, particularly with regard to the role of embolism refilling. We evaluated the recovery of xylem hydraulic capacity in young Eucalyptus saligna plants exposed to cycles of drought stress and rewatering. Plants were exposed to moderate and severe drought stress treatments, with recovery monitored at time intervals from 24 h to 6 months after rewatering. The percentage loss of xylem vessels due to embolism (PLV) was quantified at each time point using microcomputed tomography with stem water potential (Ψx) and canopy transpiration (Ec) measured before scans. Plants exposed to severe drought stress suffered high levels of embolism (47.38% ± 10.97% PLV) and almost complete canopy loss. No evidence of embolism refilling was observed at 24 h, 1 week, or 3 weeks after rewatering despite rapid recovery in Ψx. Recovery of hydraulic capacity was achieved over a 6-month period by growth of new xylem tissue, with canopy leaf area and Ec recovering over the same period. These findings indicate that E. saligna recovers slowly from severe drought stress, with potential for embolism to persist in the xylem for many months after rainfall events. © 2022 John Wiley & Sons Ltd., This study was supported by an ARC Discovery Project (DP170100761) to BC and TJB and an ARC Future Fellowship (FT130101115) to BC. BM acknowledges support from the ARC Laureate Fellowship FL190100003. CMR‐D was supported by an Individual Fellowship from the European Union's Horizon 2020 research and innovation program under the Marie Skłodowska‐Curie grant agreement no. 751918‐AgroPHYS. JMRP was supported by the ORNL, managed by UT‐Battelle, LLC, for the DOE under contract DE‐AC05‐1008 00OR22725.
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- 2022
13. Visual and hydraulic techniques produce similar estimates of cavitation resistance in woody species
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Alice Gauthey, Sylvain Delzon, Ximeng Li, Celia M. Rodriguez-Dominguez, Madeline R Carins-Murphy, Andrew J. King, David T. Tissue, Timothy J. Brodribb, Jennifer M. R. Peters, Rosana López, Belinda E. Medlyn, Brendan Choat, Hawkesbury Institute for the Environment [Richmond] (HIE), Western Sydney University, School of Biological Sciences [Hobart], University of Tasmania [Hobart, Australia] (UTAS), Instituto de Recursos Naturales y Agrobiología de Sevilla (IRNAS), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Biodiversité, Gènes & Communautés (BioGeCo), Université de Bordeaux (UB)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Universidad Politécnica de Madrid (UPM), Laboratoire de Physique et Physiologie Intégratives de l’Arbre en environnement Fluctuant (PIAF), Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Australian Research Council / DP170100761Australian Research Council / FT130101115International Synchrotron Access Program (ISAP) European Union's Horizon 2020 research and innovation program under the Marie Skodowska-Curie grant / 751918-AgroPHYS, European Commission, López, Rosana [0000-0003-3553-9148], Carins Murphy, Madeline R. [0000-0003-4370-9485], Rodríguez Domínguez, Celia M. [0000-0003-2352-0829], Delzon, Sylvain [0000-0003-3442-1711], Tissue, D.T. [0000-0002-8497-2047], Medlyn, B.E [0000-0001-5728-9827], Peters, J.M.R. [0000-0003-4627-7788], López, Rosana, Carins Murphy, Madeline R., Rodríguez Domínguez, Celia M., Delzon, Sylvain, Tissue, D.T., Medlyn, B.E, and Peters, J.M.R.
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0106 biological sciences ,0301 basic medicine ,Physiology ,[SDV]Life Sciences [q-bio] ,Context (language use) ,Soil science ,Plant Science ,Stem ,01 natural sciences ,03 medical and health sciences ,Xylem ,Methods ,Phylogeny ,Cavitation ,Resistance (ecology) ,Water ,X-Ray Microtomography ,15. Life on land ,Microcomputed tomography ,Hydraulic ,Wood ,Droughts ,030104 developmental biology ,[SDE]Environmental Sciences ,Environmental science ,Optical ,010606 plant biology & botany - Abstract
14 páginas.- 6 figuras.- referencias.- Additional Supporting Information may be found online in the Supporting Information section at the end of the article https://nph.onlinelibrary.wiley.com/action/downloadSupplement?doi=10.1111%2Fnph.16746&file=nph16746-sup-0001-SupInfo.pdf, Hydraulic failure of the plant vascular system is a principal cause of forest die-off under drought. Accurate quantification of this process is essential to our understanding of the physiological mechanisms underpinning plant mortality. Imaging techniques increasingly are applied to estimate xylem cavitation resistance. These techniques allow forin situmeasurement of embolism formation in real time, although the benefits and trade-offs associated with different techniques have not been evaluated in detail. Here we compare two imaging methods, microcomputed tomography (microCT) and optical vulnerability (OV), to standard hydraulic methods for measurement of cavitation resistance in seven woody species representing a diversity of major phylogenetic and xylem anatomical groups. Across the seven species, there was strong agreement between cavitation resistance values (P-50) estimated from visualization techniques (microCT and OV) and between visual techniques and hydraulic techniques. The results indicate that visual techniques provide accurate estimates of cavitation resistance and the degree to which xylem hydraulic function is impacted by embolism. Results are discussed in the context of trade-offs associated with each technique and possible causes of discrepancy between estimates of cavitation resistance provided by visual and hydraulic techniques., This work was supported by an ARC Discovery Projec t(DP170100761) to BC and TJB and an ARC Future Fellowship (FT130101115) to BC. We thank Daniel Hausermann, ChrisHall and Anton Maksimenko from the Australian SynchrotronImaging and Medical Beamline in Melbourne for assisting withthe micro-computed tomography methodology, as well as thetechnical staff at SOLEIL. Travel funding for AG to attendbeamtime at SOLEIL was provided by the International Syn-chrotron Access Program (ISAP) managed by the Australian Syn-chrotron. CMR-D was supported by an Individual Fellowshipfrom the European Union’s Horizon 2020 research and innovation program under the Marie Skłodowska-Curie grant agree-ment no. 751918-AgroPHYS
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14. Global variability in leaf respiration in relation to climate, plant functional types and leaf traits
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Shuang Xiang, Trofim C. Maximov, Lucy Rowland, Stephen Sitch, Keith J. Bloomfield, Emanuel Gloor, Christopher H. Lusk, Danielle Creek, Nicholas Mirotchnick, Ülo Niinemets, Michael G. Ryan, Peter B. Reich, Jon Lloyd, Fernando Valladares, Joana Zaragoza-Castells, Mary A. Heskel, John J. G. Egerton, Matthew H. Turnbull, Erik J. Veneklaas, John R. Evans, Roberta E. Martin, Jens Kattge, Françoise Yoko Ishida, Kevin L. Griffin, Gerhard Bönisch, Norma Salinas, Michael J. Liddell, Desmond Ng, Jeffrey S. Dukes, Martijn Slot, Hans Lambers, Lina M. Mercado, Pieter Poot, Mark C. Vanderwel, Kirk R. Wythers, Ian J. Wright, Nicholas G. Smith, Lasantha K. Weerasinghe, Rossella Guerrieri, Chris Huntingford, Jen Xiang, Teresa E. Gimeno, Yadvinder Malhi, Paul P. G. Gauthier, Patrick Meir, Eric G. Cosio, Odhran S. O'Sullivan, Gregory P. Asner, Mark G. Tjoelker, Damien Bonal, Lucas A. Cernusak, Graham D. Farquhar, Christian Wirth, Lourens Poorter, Matt Bradford, I. Colin Prentice, Oliver L. Phillips, Tomas F. Domingues, Belinda E. Medlyn, Nikolaos M. Fyllas, Owen K. Atkin, Kristine Y. Crous, Ayal P. Maksimov, Atkin O.K., Bloomfield K.J., Reich P.B., Tjoelker M.G., Asner G.P., Bonal D., Bonisch G., Bradford M.G., Cernusak L.A., Cosio E.G., Creek D., Crous K.Y., Domingues T.F., Dukes J.S., Egerton J.J.G., Evans J.R., Farquhar G.D., Fyllas N.M., Gauthier P.P.G., Gloor E., Gimeno T.E., Griffin K.L., Guerrieri R., Heskel M.A., Huntingford C., Ishida F.Y., Kattge J., Lambers H., Liddell M.J., Lloyd J., Lusk C.H., Martin R.E., Maksimov A.P., Maximov T.C., Malhi Y., Medlyn B.E., Meir P., Mercado L.M., Mirotchnick N., Ng D., Niinemets U., O'Sullivan O.S., Phillips O.L., Poorter L., Poot P., Prentice I.C., Salinas N., Rowland L.M., Ryan M.G., Sitch S., Slot M., Smith N.G., Turnbull M.H., Vanderwel M.C., Valladares F., Veneklaas E.J., Weerasinghe L.K., Wirth C., Wright I.J., Wythers K.R., Xiang J., Xiang S., Zaragoza-Castells J., Australian National University (ANU), Hawkesbury Institute for the Environment [Richmond] (HIE), Western Sydney University, University of Minnesota [Twin Cities] (UMN), University of Minnesota System, Carnegie Institution for Science [Washington], Ecologie et Ecophysiologie Forestières [devient SILVA en 2018] (EEF), Institut National de la Recherche Agronomique (INRA)-Université de Lorraine (UL), Max-Planck-Institut für Biogeochemie (MPI-BGC), CSIRO Land and Water, Commonwealth Scientific and Industrial Research Organisation [Canberra] (CSIRO), James Cook University (JCU), Pontificia Universidad Católica del Perú (PUCP), Universidade de São Paulo (USP), Purdue University [West Lafayette], National and Kapodistrian University of Athens (NKUA), Department of Geosciences [Princeton], Princeton University, School of Geography [Leeds], University of Leeds, Lamont-Doherty Earth Observatory (LDEO), Columbia University [New York], School of Geosciences [Edinburgh], University of Edinburgh, University of New Hampshire (UNH), Centre for Ecology and Hydrology [Wallingford] (CEH), Natural Environment Research Council (NERC), School of Plant Biology, Faculty of Natural and Agricultural Sciences, The University of Western Australia, The University of Western Australia (UWA), Department of Life Sciences, Imperial College London, Silwood Park Campus, Ascot, UK, University of Waikato [Hamilton], Institute of Biological Problems of the Cryolithozone, Russian Academy of Sciences [Moscow] (RAS), School of Geography and the Environment [Oxford] (SoGE), University of Oxford [Oxford], Macquarie University, College of Life and Environmental Sciences, University of Exeter, Department of Ecology and Evolutionary Biology [University of Toronto] (EEB), University of Toronto, Wageningen University and Research [Wageningen] (WUR), School of Biological Sciences, University of Canterbury, Colorado State University [Fort Collins] (CSU), Department of Biology [Gainesville] (UF|Biology), University of Florida [Gainesville] (UF), Smithsonian Tropical Research Institute, University of Regina (UR), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), University of Peradeniya, Universität Leipzig [Leipzig], Chinese Academy of Sciences [Beijing] (CAS), Western Sydney University (UWS), University of Minnesota [Twin Cities], National and Kapodistrian University of Athens = University of Athens (NKUA | UoA), School of Geography and the Environment [Oxford], Estonian University of Life Sciences, Wageningen University and Research Centre [Wageningen] (WUR), Department of Biology (University of Florida), University of Florida [Gainesville], Smithsonian Tropical Research Institute, Panama City, Republic of Panama., Consejo Superior de Investigaciones Científicas [Spain] (CSIC), and AXA Research Fund
- Subjects
temperature sensitivity ,Physiology ,[SDV]Life Sciences [q-bio] ,Acclimatization ,Climate ,Plant Science ,Photosynthesis ,Aridity ,Temperatures ,Ecology ,Respiration ,Temperature ,Biosphere ,Plants ,PE&RC ,Phenotype ,nitrogen concentration ,Leaf nitrogen (N) ,Plant Leave ,Life Sciences & Biomedicine ,Woody plant ,terrestrial carbon-cycle ,thermal-acclimation ,Nitrogen ,Plant Biology & Botany ,Cell Respiration ,Climate change ,Biology ,FOTOSSÍNTESE ,Climate model ,Ecology and Environment ,tropical rain-forests ,Carbon cycle ,Climate models ,Carbon Cycle ,Photosynthesi ,07 Agricultural and Veterinary Sciences ,Bosecologie en Bosbeheer ,Plant functional types (PFTs) ,elevated atmospheric co2 ,photosynthetic capacity ,Science & Technology ,Plant Sciences ,Tropics ,scaling relationships ,Plant ,15. Life on land ,Herbaceous plant ,06 Biological Sciences ,Carbon Dioxide ,Models, Theoretical ,vegetation models ,Photosynthetic capacity ,Arid ,Forest Ecology and Forest Management ,Plant Leaves ,Biology and Microbiology ,13. Climate action ,dark respiration ,Acclimation - Abstract
Owen K. Atkin [et al.].- Received: 8 July 2014, Accepted: 29 November 2014, Leaf dark respiration (Rdark) is an important yet poorly quantified component of the global carbon cycle. Given this, we analyzed a new global database of Rdark and associated leaf traits., Data for 899 species were compiled from 100 sites (from the Arctic to the tropics). Several woody and nonwoody plant functional types (PFTs) were represented. Mixed-effects models were used to disentangle sources of variation in Rdark., Area-based Rdark at the prevailing average daily growth temperature (T) of each site increased only twofold from the Arctic to the tropics, despite a 20°C increase in growing T (8–28°C). By contrast, Rdark at a standard T (25°C, Rdark25) was threefold higher in the Arctic than in the tropics, and twofold higher at arid than at mesic sites. Species and PFTs at cold sites exhibited higher Rdark25 at a given photosynthetic capacity (Vcmax25) or leaf nitrogen concentration ([N]) than species at warmer sites. Rdark25 values at any given Vcmax25 or [N] were higher in herbs than in woody plants., The results highlight variation in Rdark among species and across global gradients in T and aridity. In addition to their ecological significance, the results provide a framework for improving representation of Rdark in terrestrial biosphere models (TBMs) and associated land-surface components of Earth system models (ESMs).
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