Age-dependent leaf physiology and consequences for crown-scale carbon uptake during the dry season in an Amazon evergreen forest

Albert, Loren P.; Wu, Jin; Prohaska, Neill; de Camargo, Plinio Barbosa; Huxman, Travis E.; Tribuzy, Edgard S.; Ivanov, Valeriy Y.; Oliveira, Rafael S.; Garcia, Sabrina; Smith, Marielle N.; Oliveira Junior, Raimundo Cosme; Restrepo-Coupe, Natalia; da Silva, Rodrigo; Stark, Scott C.; Martins, Giordane A.; Penha, Deliane V.; Saleska, Scott R.

doi:10.1111/nph.15056

Age-dependent leaf physiology and consequences for crown-scale carbon uptake during the dry season in an Amazon evergreen forest

Journal Article · Sun Mar 04 04:00:00 EST 2018 · New Phytologist

DOI:https://doi.org/10.1111/nph.15056· OSTI ID:1424982

^[1]; Wu, Jin ^[2]; Prohaska, Neill ^[3]; de Camargo, Plinio Barbosa ^[4]; Huxman, Travis E. ^[5]; Tribuzy, Edgard S. ^[6]; Ivanov, Valeriy Y. ^[7]; ^[8]; Garcia, Sabrina ^[9]; Smith, Marielle N. ^[10]; Oliveira Junior, Raimundo Cosme ^[11]; Restrepo-Coupe, Natalia ^[12]; da Silva, Rodrigo ^[13]; Stark, Scott C. ^[14]; Martins, Giordane A. ^[9]; Penha, Deliane V. ^[15]; Saleska, Scott R. ^[3]

Univ. of Arizona, Tucson, AZ (United States). Dept. of Ecology and Evolutionary Biology; Brown Univ., Providence, RI (United States). Inst. at Brown for Environment and Society
Univ. of Arizona, Tucson, AZ (United States). Dept. of Ecology and Evolutionary Biology; Brookhaven National Lab. (BNL), Upton, NY (United States). Environmental and Climate Sciences Dept.
Univ. of Arizona, Tucson, AZ (United States). Dept. of Ecology and Evolutionary Biology
Univ. of Sao Paulo (Brazil). Center for Nuclear Energy in Agriculture (CENA)
Univ. of California, Irvine, CA (United States). Ecology and Evolutionary Biology and Center for Environmental Biology
Federal Univ. of Western Para, Santarem (Brazil). Inst. for Biodiversity and Forest (UFOPA)
Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Civil and Environmental Engineering
Univ. of Campinas (UNICAMP), Sao Paulo (Brazil). Dept. of Plant Biology
National Inst. of Amazonian Research (INPA), Manaus (Brazil). Tropical Forest Sciences
Univ. of Arizona, Tucson, AZ (United States). Dept. of Ecology and Evolutionary Biology; Michigan State Univ., East Lansing, MI (United States). Dept. of Forestry
Brazilian Agricultural Research Corp. (EMBRAPA), Herbarium of Embrapa AmazÃ´nia Oriental (IAN), Santarem (Brazil)
Univ. of Technology, Sydney (Australia). Plant Functional Biology and Climate Change Cluster
Federal Univ. of Western Para, Santarem (Brazil). Inst. for Biodiversity and Forest (UFOPA). Atmospheric Sciences Dept. and Inst. of Engineering and Geosciences
Michigan State Univ., East Lansing, MI (United States). Dept. of Forestry
Federal Univ. of Western Para, Santarem (Brazil). Inst. for Biodiversity and Forest (UFOPA). Society, Nature and Development Dept.

Satellite and tower-based metrics of forest-scale photosynthesis generally increase with dry season progression across central Amazônia, but the underlying mechanisms lack consensus. We conducted demographic surveys of leaf age composition, and measured age-dependence of leaf physiology in broadleaf canopy trees of abundant species at a central eastern Amazon site. Using a novel leaf-to-branch scaling approach, we used this data to independently test the much-debated hypothesis—arising from satellite and tower-based observations—that leaf phenology could explain the forest-scale pattern of dry season photosynthesis. Stomatal conductance and biochemical parameters of photosynthesis were higher for recently mature leaves than for old leaves. Most branches had multiple leaf age categories simultaneously present, and the number of recently mature leaves increased as the dry season progressed because old leaves were exchanged for new leaves. These findings provide the first direct field evidence that branch-scale photosynthetic capacity increases during the dry season, with a magnitude consistent with increases in ecosystem-scale photosynthetic capacity derived from flux towers. In conclusion, interaction between leaf age-dependent physiology and shifting leaf age-demographic composition are sufficient to explain the dry season photosynthetic capacity pattern at this site, and should be considered in vegetation models of tropical evergreen forests.

View Accepted Manuscript (DOE)

Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23); National Science Foundation (NSF); Univ. of Arizona, Tucson, AZ (United States); Brazilian Agricultural Research Corp. (EMBRAPA); Large Scale Biosphere-Atmosphere Program in the Amazon (LBA); Herbarium of Embrapa Amazônia Oriental (IAN)

Grant/Contract Number:: SC0012704; SC0008383

OSTI ID:: 1424982

Alternate ID(s):: OSTI ID: 1423698

Report Number(s):: BNL-203201-2018-JAAM

Journal Information:: New Phytologist, Journal Name: New Phytologist Journal Issue: 1 Vol. 218; ISSN 0028-646X

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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Drought effects on leaf fall, leaf flushing and stem growth in the Amazon forest: reconciling remote sensing data and field observations Janssen, Thomas; van der Velde, Ype; Hofhansl, Florian Biogeosciences, Vol. 18, Issue 14 https://doi.org/10.5194/bg-18-4445-2021	journal	July 2021
Leaf phenology amplitude derived from MODIS NDVI and EVI: Maps of leaf phenology synchrony for Meso‐ and South America Gerard, France F.; George, Charles T.; Hayman, Garry Geoscience Data Journal, Vol. 7, Issue 1 https://doi.org/10.1002/gdj3.87	journal	February 2020
Dry-Season Greening and Water Stress in Amazonia: The Role of Modeling Leaf Phenology Manoli, Gabriele; Ivanov, Valeriy Y.; Fatichi, Simone Journal of Geophysical Research: Biogeosciences, Vol. 123, Issue 6 https://doi.org/10.1029/2017jg004282	journal	June 2018
Cryptic phenology in plants: Case studies, implications, and recommendations Albert, Loren P.; Restrepo‐Coupe, Natalia; Smith, Marielle N. Global Change Biology, Vol. 25, Issue 11 https://doi.org/10.1111/gcb.14759	journal	August 2019
The response of stomatal conductance to seasonal drought in tropical forests Wu, Jin; Serbin, Shawn P.; Ely, Kim S. Global Change Biology, Vol. 26, Issue 2 https://doi.org/10.1111/gcb.14820	journal	October 2019
Seasonal and drought‐related changes in leaf area profiles depend on height and light environment in an Amazon forest Smith, Marielle N.; Stark, Scott C.; Taylor, Tyeen C. New Phytologist, Vol. 222, Issue 3 https://doi.org/10.1111/nph.15726	journal	February 2019
Phenological and structural linkages to seasonality inform productivity relationships in the Amazon Rainforest Atkins, Jeff W.; Agee, Elizabeth New Phytologist, Vol. 222, Issue 3 https://doi.org/10.1111/nph.15783	journal	February 2019
Leaf reflectance spectroscopy captures variation in carboxylation capacity across species, canopy environment and leaf age in lowland moist tropical forests Wu, Jin; Rogers, Alistair; Albert, Loren P. New Phytologist, Vol. 224, Issue 2 https://doi.org/10.1111/nph.16029	journal	June 2019

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Age-dependent leaf physiology and consequences for crown-scale carbon uptake during the dry season in an Amazon evergreen forest

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