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Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: Tropical forest canopies and their relationships with climate and disturbance: results from a global dataset of consistent field-based measurements
Author(s): Pfeifer, Marion
Gonsamo, Alemu
Woodgate, William
Cayuela, Luis
Marshall, Andrew Robert
Ledo, Alicia
Paine, C E Timothy
Marchant, Rob
Burt, Andrew
Calders, Kim
Courtney-Mustaphi, Colin
Cuni-Sanchez, Aida
Deere, Nicolas J
Denu, Dereje
Hayward, Robin Martin
Keywords: Leaf area index
Fractional vegetation cover
Fraction of absorbed photosynthetically active radiation
Human population pressure
Protected areas
Climate change
Issue Date: 8-Jan-2018
Citation: Pfeifer M, Gonsamo A, Woodgate W, Cayuela L, Marshall AR, Ledo A, Paine CET, Marchant R, Burt A, Calders K, Courtney-Mustaphi C, Cuni-Sanchez A, Deere NJ, Denu D & Hayward RM (2018) Tropical forest canopies and their relationships with climate and disturbance: results from a global dataset of consistent field-based measurements, Forest Ecosystems, 5 (1), Art. No.: 7.
Abstract: Background  Canopy structure, defined by leaf area index (LAI), fractional vegetation cover (FCover) and fraction of absorbed photosynthetically active radiation (fAPAR), regulates a wide range of forest functions and ecosystem services. Spatially consistent field-measurements of canopy structure are however lacking, particularly for the tropics.  Methods  Here, we introduce the Global LAI database: a global dataset of field-based canopy structure measurements spanning tropical forests in four continents (Africa, Asia, Australia and the Americas). We use these measurements to test for climate dependencies within and across continents, and to test for the potential of anthropogenic disturbance and forest protection to modulate those dependences.  Results  Using data collected from 887 tropical forest plots, we show that maximum water deficit, defined across the most arid months of the year, is an important predictor of canopy structure, with all three canopy attributes declining significantly with increasing water deficit. Canopy attributes also increase with minimum temperature, and with the protection of forests according to both active (within protected areas) and passive measures (through topography). Once protection and continent effects are accounted for, other anthropogenic measures (e.g. human population) do not improve the model.  Conclusions  We conclude that canopy structure in the tropics is primarily a consequence of forest adaptation to the maximum water deficits historically experienced within a given region. Climate change, and in particular changes in drought regimes may thus affect forest structure and function, but forest protection may offer some resilience against this effect.
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Rights: © The Author(s). 2018 This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (, which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Notes: Additional co-authors: Jose Gonzalez de Tanago, Alvaro Lau, Manuel J. Macía, Pieter I. Olivier, Petri Pellikka, Hamidu Seki, Deo Shirima, Rebecca Trevithick, Beatrice Wedeux, Charlotte Wheeler, Pantaleo K. T. Munishi, Thomas Martin, Abdul Mustari and Philip J. Platts

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