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Ren Y, Wang H, Harrison SP, Prentice IC, Atkin OK, Smith NG, Mengoli G, Stefanski A, Reich PB. Reduced global plant respiration due to the acclimation of leaf dark respiration coupled with photosynthesis. New Phytol 2024; 241:578-591. [PMID: 37897087 DOI: 10.1111/nph.19355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Accepted: 10/10/2023] [Indexed: 10/29/2023]
Abstract
Leaf dark respiration (Rd ) acclimates to environmental changes. However, the magnitude, controls and time scales of acclimation remain unclear and are inconsistently treated in ecosystem models. We hypothesized that Rd and Rubisco carboxylation capacity (Vcmax ) at 25°C (Rd,25 , Vcmax,25 ) are coordinated so that Rd,25 variations support Vcmax,25 at a level allowing full light use, with Vcmax,25 reflecting daytime conditions (for photosynthesis), and Rd,25 /Vcmax,25 reflecting night-time conditions (for starch degradation and sucrose export). We tested this hypothesis temporally using a 5-yr warming experiment, and spatially using an extensive field-measurement data set. We compared the results to three published alternatives: Rd,25 declines linearly with daily average prior temperature; Rd at average prior night temperatures tends towards a constant value; and Rd,25 /Vcmax,25 is constant. Our hypothesis accounted for more variation in observed Rd,25 over time (R2 = 0.74) and space (R2 = 0.68) than the alternatives. Night-time temperature dominated the seasonal time-course of Rd , with an apparent response time scale of c. 2 wk. Vcmax dominated the spatial patterns. Our acclimation hypothesis results in a smaller increase in global Rd in response to rising CO2 and warming than is projected by the two of three alternative hypotheses, and by current models.
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Affiliation(s)
- Yanghang Ren
- Department of Earth System Science, Ministry of Education Key Laboratory for Earth System Modeling, Institute for Global Change Studies, Tsinghua University, Beijing, 100084, China
| | - Han Wang
- Department of Earth System Science, Ministry of Education Key Laboratory for Earth System Modeling, Institute for Global Change Studies, Tsinghua University, Beijing, 100084, China
| | - Sandy P Harrison
- Department of Earth System Science, Ministry of Education Key Laboratory for Earth System Modeling, Institute for Global Change Studies, Tsinghua University, Beijing, 100084, China
- School of Archaeology, Geography and Environmental Sciences (SAGES), University of Reading, Reading, RG6 6AH, UK
| | - I Colin Prentice
- Department of Earth System Science, Ministry of Education Key Laboratory for Earth System Modeling, Institute for Global Change Studies, Tsinghua University, Beijing, 100084, China
- Department of Life Sciences, Georgina Mace Centre for the Living Planet, Imperial College London, Silwood Park Campus, Buckhurst Road, Ascot, SL5 7PY, UK
| | - Owen K Atkin
- ARC Centre of Excellence in Plant Energy Biology, Research School of Biology, The Australian National University, Building 134, Canberra, ACT, 2601, Australia
- Division of Plant Sciences, Research School of Biology, The Australian National University, Building 46, Canberra, ACT, 2601, Australia
| | - Nicholas G Smith
- Department of Biological Sciences, Texas Tech University, Lubbock, TX, 79409, USA
| | - Giulia Mengoli
- Department of Life Sciences, Georgina Mace Centre for the Living Planet, Imperial College London, Silwood Park Campus, Buckhurst Road, Ascot, SL5 7PY, UK
| | - Artur Stefanski
- Department of Forest Resources, University of Minnesota, St Paul, MN, 55108, USA
| | - Peter B Reich
- Department of Forest Resources, University of Minnesota, St Paul, MN, 55108, USA
- Institute for Global Change Biology, and School for the Environment and Sustainability, University of Michigan, Ann Arbor, MI, 48109, USA
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW, 2753, Australia
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Piva SB, Barker SJ, Iverson NA, Winton VHL, Bertler NAN, Sigl M, Wilson CJN, Dunbar NW, Kurbatov AV, Carter L, Charlier BLA, Newnham RM. Volcanic glass from the 1.8 ka Taupō eruption (New Zealand) detected in Antarctic ice at ~ 230 CE. Sci Rep 2023; 13:16720. [PMID: 37813875 PMCID: PMC10562440 DOI: 10.1038/s41598-023-42602-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Accepted: 09/12/2023] [Indexed: 10/11/2023] Open
Abstract
Chemical anomalies in polar ice core records are frequently linked to volcanism; however, without the presence of (crypto)tephra particles, links to specific eruptions remain speculative. Correlating tephras yields estimates of eruption timing and potential source volcano, offers refinement of ice core chronologies, and provides insights into volcanic impacts. Here, we report on sparse rhyolitic glass shards detected in the Roosevelt Island Climate Evolution (RICE) ice core (West Antarctica), attributed to the 1.8 ka Taupō eruption (New Zealand)-one of the largest and most energetic Holocene eruptions globally. Six shards of a distinctive geochemical composition, identical within analytical uncertainties to proximal Taupō glass, are accompanied by a single shard indistinguishable from glass of the ~25.5 ka Ōruanui supereruption, also from Taupō volcano. This double fingerprint uniquely identifies the source volcano and helps link the shards to the climactic phase of the Taupō eruption. The englacial Taupō-derived glass shards coincide with a particle spike and conductivity anomaly at 278.84 m core depth, along with trachytic glass from a local Antarctic eruption of Mt. Melbourne. The assessed age of the sampled ice is 230 ± 19 CE (95% confidence), confirming that the published radiocarbon wiggle-match date of 232 ± 10 CE (2 SD) for the Taupō eruption is robust.
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Affiliation(s)
- Stephen B Piva
- School of Geography, Environment and Earth Sciences, Victoria University of Wellington, P.O. Box 600, Wellington, 6140, New Zealand.
| | - Simon J Barker
- School of Geography, Environment and Earth Sciences, Victoria University of Wellington, P.O. Box 600, Wellington, 6140, New Zealand
| | - Nels A Iverson
- New Mexico Bureau of Geology and Mineral Resources, New Mexico Institute of Mining and Technology, 801 Leroy Place, Socorro, NM, 87801, USA
| | - V Holly L Winton
- Antarctic Research Centre, Victoria University of Wellington, P. O. Box 600, Wellington, 6140, New Zealand
| | - Nancy A N Bertler
- Antarctic Research Centre, Victoria University of Wellington, P. O. Box 600, Wellington, 6140, New Zealand
- GNS Science, National Isotope Centre, PO Box 30-368, Lower Hutt, 5040, New Zealand
| | - Michael Sigl
- Climate and Environmental Physics, Physics Institute and Oeschger Centre for Climate Change Research, University of Bern, Hochschulstrasse 4, 3012, Bern, Switzerland
| | - Colin J N Wilson
- School of Geography, Environment and Earth Sciences, Victoria University of Wellington, P.O. Box 600, Wellington, 6140, New Zealand
| | - Nelia W Dunbar
- New Mexico Bureau of Geology and Mineral Resources, New Mexico Institute of Mining and Technology, 801 Leroy Place, Socorro, NM, 87801, USA
| | - Andrei V Kurbatov
- Climate Change Institute, School of Earth and Climate Sciences, University of Maine, 168 College Avenue, Orono, ME, 04469, USA
| | - Lionel Carter
- Antarctic Research Centre, Victoria University of Wellington, P. O. Box 600, Wellington, 6140, New Zealand
| | - Bruce L A Charlier
- School of Geography, Environment and Earth Sciences, Victoria University of Wellington, P.O. Box 600, Wellington, 6140, New Zealand
| | - Rewi M Newnham
- School of Geography, Environment and Earth Sciences, Victoria University of Wellington, P.O. Box 600, Wellington, 6140, New Zealand
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