Tropical forest canopies and their relationships with climate and disturbance

results from a global dataset of consistent field-based measurements

Marion Pfeifer, Alemu Gonsamo, William Woodgate, Luis Cayuela, Andrew R. Marshall, Alicia Ledo, Timothy C. E. Paine, Rob Marchant, Andrew Burt, Kim Calders, Colin Courtney-Mustaphi, Aida Cuni-Sanchez, Nicolas J. Deere, Dereje Denu, Jose Gonzalez de Tanago, Robin Hayward, Alvaro Lau, Manuel J. Macía, Pieter I. Olivier, Petri Pellikka & 9 others Hamidu Seki, Deo Shirima, Rebecca Trevithick, Beatrice Wedeux, Charlotte Wheeler, Pantaleo K. T. Munishi, Thomas Martin, Abdul Mustari, Philip J. Platts

Research output: Contribution to journalArticle

2 Citations (Scopus)
6 Downloads (Pure)

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.
Original languageEnglish
Article number7
Pages (from-to)1-14
Number of pages14
JournalForest Ecosystems
Volume5
DOIs
Publication statusPublished - 8 Jan 2018

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forest canopy
tropical forests
tropical forest
canopy
climate
disturbance
leaf area index
tropics
water
photosynthetically active radiation
vegetation cover
ecosystem service
human population
ecosystem services
anthropogenic activities
topography
protected area
conservation areas
drought
testing

Keywords

  • Leaf area index
  • Fractional vegetation cover
  • Fraction of absorbed photosynthetically active radiation
  • Human population pressure
  • Protected areas
  • Drought
  • Climate change

Cite this

Tropical forest canopies and their relationships with climate and disturbance : results from a global dataset of consistent field-based measurements. / Pfeifer, Marion; Gonsamo, Alemu; Woodgate, William; Cayuela, Luis; Marshall, Andrew R.; Ledo, Alicia; Paine, Timothy C. E.; Marchant, Rob; Burt, Andrew; Calders, Kim; Courtney-Mustaphi, Colin; Cuni-Sanchez, Aida; Deere, Nicolas J.; Denu, Dereje; de Tanago, Jose Gonzalez; Hayward, Robin; Lau, Alvaro; Macía, Manuel J.; Olivier, Pieter I.; Pellikka, Petri; Seki, Hamidu; Shirima, Deo; Trevithick, Rebecca; Wedeux, Beatrice; Wheeler, Charlotte; Munishi, Pantaleo K. T.; Martin, Thomas; Mustari, Abdul; Platts, Philip J.

In: Forest Ecosystems, Vol. 5, 7, 08.01.2018, p. 1-14.

Research output: Contribution to journalArticle

Pfeifer, M, Gonsamo, A, Woodgate, W, Cayuela, L, Marshall, AR, Ledo, A, Paine, TCE, Marchant, R, Burt, A, Calders, K, Courtney-Mustaphi, C, Cuni-Sanchez, A, Deere, NJ, Denu, D, de Tanago, JG, Hayward, R, Lau, A, Macía, MJ, Olivier, PI, Pellikka, P, Seki, H, Shirima, D, Trevithick, R, Wedeux, B, Wheeler, C, Munishi, PKT, Martin, T, Mustari, A & Platts, PJ 2018, 'Tropical forest canopies and their relationships with climate and disturbance: results from a global dataset of consistent field-based measurements', Forest Ecosystems, vol. 5, 7, pp. 1-14. https://doi.org/10.1186/s40663-017-0118-7
Pfeifer, Marion ; Gonsamo, Alemu ; Woodgate, William ; Cayuela, Luis ; Marshall, Andrew R. ; Ledo, Alicia ; Paine, Timothy C. E. ; Marchant, Rob ; Burt, Andrew ; Calders, Kim ; Courtney-Mustaphi, Colin ; Cuni-Sanchez, Aida ; Deere, Nicolas J. ; Denu, Dereje ; de Tanago, Jose Gonzalez ; Hayward, Robin ; Lau, Alvaro ; Macía, Manuel J. ; Olivier, Pieter I. ; Pellikka, Petri ; Seki, Hamidu ; Shirima, Deo ; Trevithick, Rebecca ; Wedeux, Beatrice ; Wheeler, Charlotte ; Munishi, Pantaleo K. T. ; Martin, Thomas ; Mustari, Abdul ; Platts, Philip J. / Tropical forest canopies and their relationships with climate and disturbance : results from a global dataset of consistent field-based measurements. In: Forest Ecosystems. 2018 ; Vol. 5. pp. 1-14.
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title = "Tropical forest canopies and their relationships with climate and disturbance: results from a global dataset of consistent field-based measurements",
abstract = "BackgroundCanopy 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.MethodsHere, 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.ResultsUsing 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.ConclusionsWe 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.",
keywords = "Leaf area index, Fractional vegetation cover, Fraction of absorbed photosynthetically active radiation, Human population pressure, Protected areas, Drought, Climate change",
author = "Marion Pfeifer and Alemu Gonsamo and William Woodgate and Luis Cayuela and Marshall, {Andrew R.} and Alicia Ledo and Paine, {Timothy C. E.} and Rob Marchant and Andrew Burt and Kim Calders and Colin Courtney-Mustaphi and Aida Cuni-Sanchez and Deere, {Nicolas J.} and Dereje Denu and {de Tanago}, {Jose Gonzalez} and Robin Hayward and Alvaro Lau and Mac{\'i}a, {Manuel J.} and Olivier, {Pieter I.} and Petri Pellikka and Hamidu Seki and Deo Shirima and Rebecca Trevithick and Beatrice Wedeux and Charlotte Wheeler and Munishi, {Pantaleo K. T.} and Thomas Martin and Abdul Mustari and Platts, {Philip J.}",
note = "Acknowledgements We thank the students and research assistants involved in the various projects for their help in the field during data collection. We acknowledge the British Institute in Eastern Africa for logistic support during fieldwork campaigns in Kenya, Ethiopia and Tanzania. We thank the Stability of Altered Forest Ecosystems project for logistic support in Malaysian Borneo. RH, TM and AHM also thank Kementerian Negara Riset dan Teknologi (RISTEK) for permission to work in Indonesia under research permit number 178/SIP/FRP/SM/V1/2014. Funding CCM was supported by the ‘Uncovering the variable roles of fire in savannah ecosystems’ project, funded by Leverhulme Trust under grant IN-2014-022 and ‘Resilience in East African Landscapes’ project funded by European Commission Marie Curie Initial Training Network (FP7-PEOPLE-2013-ITN project number 606879). MP and AM collected data in Tanzania with funding from Australian Research Council, IUCN Sustain / African Wildlife Foundation and University of York Research Pump Priming Fund. MP and PO collected data in South Africa with funding through the European Research Council ERC-2011-StG_20101109 (project number 281986) and the British Ecological Society - Ecologists in Africa programme. MP, PP, ACS and RM collected data in Kenya, Ethiopia and Tanzania with support through the ‘Climate Change Impacts on Ecosystem Services and Food Security in Eastern Africa (CHIESA)’ project (2011–2015), which was funded by the Ministry for Foreign Affairs of Finland, and coordinated by the International Centre of Insect Physiology and Ecology (icipe) in Nairobi, Kenya. WWF-REDD provided funding to ND to collect data in Tanzania.",
year = "2018",
month = "1",
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doi = "10.1186/s40663-017-0118-7",
language = "English",
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TY - JOUR

T1 - Tropical forest canopies and their relationships with climate and disturbance

T2 - results from a global dataset of consistent field-based measurements

AU - Pfeifer, Marion

AU - Gonsamo, Alemu

AU - Woodgate, William

AU - Cayuela, Luis

AU - Marshall, Andrew R.

AU - Ledo, Alicia

AU - Paine, Timothy C. E.

AU - Marchant, Rob

AU - Burt, Andrew

AU - Calders, Kim

AU - Courtney-Mustaphi, Colin

AU - Cuni-Sanchez, Aida

AU - Deere, Nicolas J.

AU - Denu, Dereje

AU - de Tanago, Jose Gonzalez

AU - Hayward, Robin

AU - Lau, Alvaro

AU - Macía, Manuel J.

AU - Olivier, Pieter I.

AU - Pellikka, Petri

AU - Seki, Hamidu

AU - Shirima, Deo

AU - Trevithick, Rebecca

AU - Wedeux, Beatrice

AU - Wheeler, Charlotte

AU - Munishi, Pantaleo K. T.

AU - Martin, Thomas

AU - Mustari, Abdul

AU - Platts, Philip J.

N1 - Acknowledgements We thank the students and research assistants involved in the various projects for their help in the field during data collection. We acknowledge the British Institute in Eastern Africa for logistic support during fieldwork campaigns in Kenya, Ethiopia and Tanzania. We thank the Stability of Altered Forest Ecosystems project for logistic support in Malaysian Borneo. RH, TM and AHM also thank Kementerian Negara Riset dan Teknologi (RISTEK) for permission to work in Indonesia under research permit number 178/SIP/FRP/SM/V1/2014. Funding CCM was supported by the ‘Uncovering the variable roles of fire in savannah ecosystems’ project, funded by Leverhulme Trust under grant IN-2014-022 and ‘Resilience in East African Landscapes’ project funded by European Commission Marie Curie Initial Training Network (FP7-PEOPLE-2013-ITN project number 606879). MP and AM collected data in Tanzania with funding from Australian Research Council, IUCN Sustain / African Wildlife Foundation and University of York Research Pump Priming Fund. MP and PO collected data in South Africa with funding through the European Research Council ERC-2011-StG_20101109 (project number 281986) and the British Ecological Society - Ecologists in Africa programme. MP, PP, ACS and RM collected data in Kenya, Ethiopia and Tanzania with support through the ‘Climate Change Impacts on Ecosystem Services and Food Security in Eastern Africa (CHIESA)’ project (2011–2015), which was funded by the Ministry for Foreign Affairs of Finland, and coordinated by the International Centre of Insect Physiology and Ecology (icipe) in Nairobi, Kenya. WWF-REDD provided funding to ND to collect data in Tanzania.

PY - 2018/1/8

Y1 - 2018/1/8

N2 - BackgroundCanopy 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.MethodsHere, 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.ResultsUsing 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.ConclusionsWe 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.

AB - BackgroundCanopy 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.MethodsHere, 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.ResultsUsing 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.ConclusionsWe 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.

KW - Leaf area index

KW - Fractional vegetation cover

KW - Fraction of absorbed photosynthetically active radiation

KW - Human population pressure

KW - Protected areas

KW - Drought

KW - Climate change

U2 - 10.1186/s40663-017-0118-7

DO - 10.1186/s40663-017-0118-7

M3 - Article

VL - 5

SP - 1

EP - 14

JO - Forest Ecosystems

JF - Forest Ecosystems

SN - 2197-5620

M1 - 7

ER -