Leaf development and demography explain photosynthetic seasonality in Amazon evergreen forests

Wu, J; Albert, LP; Lopes, AP; Restrepo-Coupe, N; Hayek, M; Wiedemann, KT; Guan, K; Stark, SC; Christoffersen, B; Prohaska, N; Tavares, JV; Marostica, S; Kobayashi, H; Ferreira, ML; Campos, KS; Dda Silva, R; Brando, PM; Dye, DG; Huxman, TE; Huete, AR; Nelson, BW; Saleska, SR

Leaf development and demography explain photosynthetic seasonality in Amazon evergreen forests

Wu, J Albert, LP Lopes, AP Restrepo-Coupe, N

Hayek, M Wiedemann, KT Guan, K Stark, SC Christoffersen, B Prohaska, N Tavares, JV Marostica, S Kobayashi, H Ferreira, ML Campos, KS Dda Silva, R Brando, PM Dye, DG Huxman, TE Huete, AR

Nelson, BW Saleska, SR

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Publication Type:: Journal Article
Citation:: Science, 2016, 351 (6276), pp. 972 - 976
Issue Date:: 2016-02-26

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Field	Value	Language
dc.contributor.author	Wu, J	en_US
dc.contributor.author	Albert, LP	en_US
dc.contributor.author	Lopes, AP	en_US
dc.contributor.author	Restrepo-Coupe, N https://orcid.org/0000-0003-3921-1772	en_US
dc.contributor.author	Hayek, M	en_US
dc.contributor.author	Wiedemann, KT	en_US
dc.contributor.author	Guan, K	en_US
dc.contributor.author	Stark, SC	en_US
dc.contributor.author	Christoffersen, B	en_US
dc.contributor.author	Prohaska, N	en_US
dc.contributor.author	Tavares, JV	en_US
dc.contributor.author	Marostica, S	en_US
dc.contributor.author	Kobayashi, H	en_US
dc.contributor.author	Ferreira, ML	en_US
dc.contributor.author	Campos, KS	en_US
dc.contributor.author	Dda Silva, R	en_US
dc.contributor.author	Brando, PM	en_US
dc.contributor.author	Dye, DG	en_US
dc.contributor.author	Huxman, TE	en_US
dc.contributor.author	Huete, AR https://orcid.org/0000-0003-2809-2376	en_US
dc.contributor.author	Nelson, BW	en_US
dc.contributor.author	Saleska, SR	en_US
dc.date.issued	2016-02-26	en_US
dc.identifier.citation	Science, 2016, 351 (6276), pp. 972 - 976	en_US
dc.identifier.issn	0036-8075	en_US
dc.identifier.uri	http://hdl.handle.net/10453/117257
dc.description.abstract	© 2016 by the American Association for the Advancement of Science; all rights reserved. In evergreen tropical forests, the extent, magnitude, and controls on photosynthetic seasonality are poorly resolved and inadequately represented in Earth system models. Combining camera observations with ecosystem carbon dioxide fluxes at forests across rainfall gradients in Amazônia, we show that aggregate canopy phenology, not seasonality of climate drivers, is the primary cause of photosynthetic seasonality in these forests. Specifically, synchronization of new leaf growth with dry season litterfall shifts canopy composition toward younger, more light-use efficient leaves, explaining large seasonal increases (~27%) in ecosystem photosynthesis. Coordinated leaf development and demography thus reconcile seemingly disparate observations at different scales and indicate that accounting for leaf-level phenology is critical for accurately simulating ecosystem-scale responses to climate change.	en_US
dc.relation	http://purl.org/au-research/grants/arc/DP140102698
dc.relation.ispartof	Science	en_US
dc.relation.isbasedon	10.1126/science.aad5068	en_US
dc.subject.classification	General Science & Technology	en_US
dc.subject.mesh	Plant Leaves	en_US
dc.subject.mesh	Tropical Climate	en_US
dc.subject.mesh	Seasons	en_US
dc.subject.mesh	Demography	en_US
dc.subject.mesh	Photosynthesis	en_US
dc.subject.mesh	Light	en_US
dc.subject.mesh	Climate Change	en_US
dc.subject.mesh	Forests	en_US
dc.title	Leaf development and demography explain photosynthetic seasonality in Amazon evergreen forests	en_US
dc.type	Journal Article
utslib.citation.volume	6276	en_US
utslib.citation.volume	351	en_US
utslib.for	0607 Plant Biology	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Life Sciences
pubs.organisational-group	/University of Technology Sydney/Strength - CAMGIS - Centre for Advanced Modelling and Geospatial lnformation Systems
utslib.copyright.status	closed_access
pubs.issue	6276	en_US
pubs.publication-status	Published	en_US
pubs.volume	351	en_US

Abstract:

© 2016 by the American Association for the Advancement of Science; all rights reserved. In evergreen tropical forests, the extent, magnitude, and controls on photosynthetic seasonality are poorly resolved and inadequately represented in Earth system models. Combining camera observations with ecosystem carbon dioxide fluxes at forests across rainfall gradients in Amazônia, we show that aggregate canopy phenology, not seasonality of climate drivers, is the primary cause of photosynthetic seasonality in these forests. Specifically, synchronization of new leaf growth with dry season litterfall shifts canopy composition toward younger, more light-use efficient leaves, explaining large seasonal increases (~27%) in ecosystem photosynthesis. Coordinated leaf development and demography thus reconcile seemingly disparate observations at different scales and indicate that accounting for leaf-level phenology is critical for accurately simulating ecosystem-scale responses to climate change.

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http://hdl.handle.net/10453/117257