Seasonal and drought-related changes in leaf area profiles depend on height and light environment in an Amazon forest

Seasonal and drought-related changes in leaf area profiles depend on height and light environment in an Amazon forest

© 2019 The Authors. New Phytologist © 2019 New Phytologist Trust.

Bibliographische Detailangaben
Veröffentlicht in:The New phytologist. - 1984. - 222(2019), 3 vom: 15. Mai, Seite 1284-1297
1. Verfasser: Smith, Marielle N (VerfasserIn)
Weitere Verfasser: Stark, Scott C, Taylor, Tyeen C, Ferreira, Mauricio L, de Oliveira, Eronaldo, Restrepo-Coupe, Natalia, Chen, Shuli, Woodcock, Tara, Dos Santos, Darlisson Bentes, Alves, Luciana F, Figueira, Michela, de Camargo, Plinio B, de Oliveira, Raimundo C, Aragão, Luiz E O C, Falk, Donald A, McMahon, Sean M, Huxman, Travis E, Saleska, Scott R
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2019
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. Amazon forest El Niño drought LiDAR remote sensing climate change forest canopy structure leaf area phenology
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100 1 |a Smith, Marielle N  |e verfasserin  |4 aut 
245 1 0 |a Seasonal and drought-related changes in leaf area profiles depend on height and light environment in an Amazon forest 
264 1 |c 2019 
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500 |a Date Completed 27.02.2020 
500 |a Date Revised 30.09.2020 
500 |a published: Print-Electronic 
500 |a CommentIn: New Phytol. 2019 May;222(3):1165-1166. doi: 10.1111/nph.15783. - PMID 30932186 
500 |a Citation Status MEDLINE 
520 |a © 2019 The Authors. New Phytologist © 2019 New Phytologist Trust. 
520 |a Seasonal dynamics in the vertical distribution of leaf area index (LAI) may impact the seasonality of forest productivity in Amazonian forests. However, until recently, fine-scale observations critical to revealing ecological mechanisms underlying these changes have been lacking. To investigate fine-scale variation in leaf area with seasonality and drought we conducted monthly ground-based LiDAR surveys over 4 yr at an Amazon forest site. We analysed temporal changes in vertically structured LAI along axes of both canopy height and light environments. Upper canopy LAI increased during the dry season, whereas lower canopy LAI decreased. The low canopy decrease was driven by highly illuminated leaves of smaller trees in gaps. By contrast, understory LAI increased concurrently with the upper canopy. Hence, tree phenological strategies were stratified by height and light environments. Trends were amplified during a 2015-2016 severe El Niño drought. Leaf area low in the canopy exhibited behaviour consistent with water limitation. Leaf loss from short trees in high light during drought may be associated with strategies to tolerate limited access to deep soil water and stressful leaf environments. Vertically and environmentally structured phenological processes suggest a critical role of canopy structural heterogeneity in seasonal changes in Amazon ecosystem function 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
650 4 |a Research Support, U.S. Gov't, Non-P.H.S. 
650 4 |a Amazon forest 
650 4 |a El Niño drought 
650 4 |a LiDAR remote sensing 
650 4 |a climate change 
650 4 |a forest canopy structure 
650 4 |a leaf area 
650 4 |a phenology 
700 1 |a Stark, Scott C  |e verfasserin  |4 aut 
700 1 |a Taylor, Tyeen C  |e verfasserin  |4 aut 
700 1 |a Ferreira, Mauricio L  |e verfasserin  |4 aut 
700 1 |a de Oliveira, Eronaldo  |e verfasserin  |4 aut 
700 1 |a Restrepo-Coupe, Natalia  |e verfasserin  |4 aut 
700 1 |a Chen, Shuli  |e verfasserin  |4 aut 
700 1 |a Woodcock, Tara  |e verfasserin  |4 aut 
700 1 |a Dos Santos, Darlisson Bentes  |e verfasserin  |4 aut 
700 1 |a Alves, Luciana F  |e verfasserin  |4 aut 
700 1 |a Figueira, Michela  |e verfasserin  |4 aut 
700 1 |a de Camargo, Plinio B  |e verfasserin  |4 aut 
700 1 |a de Oliveira, Raimundo C  |e verfasserin  |4 aut 
700 1 |a Aragão, Luiz E O C  |e verfasserin  |4 aut 
700 1 |a Falk, Donald A  |e verfasserin  |4 aut 
700 1 |a McMahon, Sean M  |e verfasserin  |4 aut 
700 1 |a Huxman, Travis E  |e verfasserin  |4 aut 
700 1 |a Saleska, Scott R  |e verfasserin  |4 aut 
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