Large seasonal swings in leaf area of Amazon rainforests

Myneni, RB; Yang, W; Nemani, RR; Huete, AR; Dickinson, RE; Knyazikhin, Y; Didan, K; Fu, R; Negrón Juárez, RI; Saatchi, SS; Hashimoto, H; Ichii, K; Shabanov, NV; Tan, B; Ratana, P; Privette, JL; Morisette, JT; Vermote, EF; Roy, DP; Wolfe, RE; Friedl, MA; Running, SW; Votava, P; El-Saleous, N; Devadiga, S; Su, Y; Salomonson, VV

Large seasonal swings in leaf area of Amazon rainforests

Myneni, RB Yang, W Nemani, RR Huete, AR

Dickinson, RE Knyazikhin, Y Didan, K Fu, R Negrón Juárez, RI Saatchi, SS Hashimoto, H Ichii, K Shabanov, NV Tan, B Ratana, P

Privette, JL Morisette, JT Vermote, EF Roy, DP Wolfe, RE Friedl, MA Running, SW Votava, P El-Saleous, N Devadiga, S Su, Y Salomonson, VV

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Publication Type:: Journal Article
Citation:: Proceedings of the National Academy of Sciences of the United States of America, 2007, 104 (12), pp. 4820 - 4823
Issue Date:: 2007-03-20

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Field	Value	Language
dc.contributor.author	Myneni, RB	en_US
dc.contributor.author	Yang, W	en_US
dc.contributor.author	Nemani, RR	en_US
dc.contributor.author	Huete, AR https://orcid.org/0000-0003-2809-2376	en_US
dc.contributor.author	Dickinson, RE	en_US
dc.contributor.author	Knyazikhin, Y	en_US
dc.contributor.author	Didan, K	en_US
dc.contributor.author	Fu, R	en_US
dc.contributor.author	Negrón Juárez, RI	en_US
dc.contributor.author	Saatchi, SS	en_US
dc.contributor.author	Hashimoto, H	en_US
dc.contributor.author	Ichii, K	en_US
dc.contributor.author	Shabanov, NV	en_US
dc.contributor.author	Tan, B	en_US
dc.contributor.author	Ratana, P https://orcid.org/0000-0002-1853-2860	en_US
dc.contributor.author	Privette, JL	en_US
dc.contributor.author	Morisette, JT	en_US
dc.contributor.author	Vermote, EF	en_US
dc.contributor.author	Roy, DP	en_US
dc.contributor.author	Wolfe, RE	en_US
dc.contributor.author	Friedl, MA	en_US
dc.contributor.author	Running, SW	en_US
dc.contributor.author	Votava, P	en_US
dc.contributor.author	El-Saleous, N	en_US
dc.contributor.author	Devadiga, S	en_US
dc.contributor.author	Su, Y	en_US
dc.contributor.author	Salomonson, VV	en_US
dc.date.issued	2007-03-20	en_US
dc.identifier.citation	Proceedings of the National Academy of Sciences of the United States of America, 2007, 104 (12), pp. 4820 - 4823	en_US
dc.identifier.issn	0027-8424	en_US
dc.identifier.uri	http://hdl.handle.net/10453/14760
dc.description.abstract	Despite early speculation to the contrary, all tropical forests studied to date display seasonal variations in the presence of new leaves, flowers, and fruits. Past studies were focused on the timing of phenological events and their cues but not on the accompanying changes in leaf area that regulate vegetation-atmosphere exchanges of energy, momentum, and mass. Here we report, from analysis of 5 years of recent satellite data, seasonal swings in green leaf area of ≈25% in a majority of the Amazon rainforests. This seasonal cycle is timed to the seasonality of solar radiation in a manner that is suggestive of anticipatory and opportunistic patterns of net leaf flushing during the early to mid part of the light-rich dry season and net leaf abscission during the cloudy wet season. These seasonal swings in leaf area may be critical to initiation of the transition from dry to wet season, seasonal carbon balance between photosynthetic gains and respiratory losses, and litterfall nutrient cycling in moist tropical forests. © 2007 by The National Academy of Sciences of the USA.	en_US
dc.relation.ispartof	Proceedings of the National Academy of Sciences of the United States of America	en_US
dc.relation.isbasedon	10.1073/pnas.0611338104	en_US
dc.subject.mesh	Plant Leaves	en_US
dc.subject.mesh	Trees	en_US
dc.subject.mesh	Organ Size	en_US
dc.subject.mesh	Rain	en_US
dc.subject.mesh	Sunlight	en_US
dc.subject.mesh	Seasons	en_US
dc.subject.mesh	Geography	en_US
dc.subject.mesh	Time Factors	en_US
dc.subject.mesh	Satellite Communications	en_US
dc.subject.mesh	Brazil	en_US
dc.title	Large seasonal swings in leaf area of Amazon rainforests	en_US
dc.type	Journal Article
utslib.citation.volume	12	en_US
utslib.citation.volume	104	en_US
utslib.for	0602 Ecology	en_US
utslib.for	0502 Environmental Science and Management	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	12	en_US
pubs.publication-status	Published	en_US
pubs.volume	104	en_US

Abstract:

Despite early speculation to the contrary, all tropical forests studied to date display seasonal variations in the presence of new leaves, flowers, and fruits. Past studies were focused on the timing of phenological events and their cues but not on the accompanying changes in leaf area that regulate vegetation-atmosphere exchanges of energy, momentum, and mass. Here we report, from analysis of 5 years of recent satellite data, seasonal swings in green leaf area of ≈25% in a majority of the Amazon rainforests. This seasonal cycle is timed to the seasonality of solar radiation in a manner that is suggestive of anticipatory and opportunistic patterns of net leaf flushing during the early to mid part of the light-rich dry season and net leaf abscission during the cloudy wet season. These seasonal swings in leaf area may be critical to initiation of the transition from dry to wet season, seasonal carbon balance between photosynthetic gains and respiratory losses, and litterfall nutrient cycling in moist tropical forests. © 2007 by The National Academy of Sciences of the USA.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/14760