University of Oulu

Ismail, Ali Torabi Haghighi, Hannu Marttila, Oka Karyanto, Bjørn Kløve, Recent results from an ecohydrological study of forest species in drained tropical peatlands, Agricultural and Forest Meteorology, Volume 331, 2023, 109338, ISSN 0168-1923,

Recent results from an ecohydrological study of forest species in drained tropical peatlands

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Author: Ismail1; Torabi Haghighi, Ali1; Marttila, Hannu1;
Organizations: 1Water, Energy, and Environmental Engineering Research Unit, University of Oulu, P.O.Box 8000, Pentti Kaiteran katu 1, Oulu, 90014, Finland
2Faculty of Forestry, Universitas Gadjah Mada, Agro street 1, Bulaksumur, Yogyakarta, 55281, Indonesia
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 13.3 MB)
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Language: English
Published: Elsevier, 2023
Publish Date: 2023-05-02


Ecohydrological studies in tropical peatland have mostly focused on a small number of non-native commercial species. However, studies of native species are urgently needed as they are considered to be a possible solution in the restoration of millions of hectares of degraded tropical peatlands. We investigated peatland species on Padang Island, Indonesia, to assess their responses to changing environmental factors, particularly the high fluctuation of the water table due to intensive peatland draining. We monitored the sap-flux velocity and radial growth of six trees (four native and one non-native peatland species) in high temporal resolution using sap-flux meters and dendrometers up to seven months. Monitoring also included hydrological and micrometeorological parameters. We found that sap-flux velocity in the monitored species was mainly controlled by air vapor pressure deficits, photosynthetic active radiation, and to some extent, by wind speed and water-table depth. We also observed a species-specific correlation between daily sap-flux velocity and daily radial growth. Non-native Acacia crassicarpa had up to twice the radial growth of native species. This growth of non-native species was significantly higher at a shallow water-table depth, while native species did not show the same relationship. The interaction between water-table depth, sap-flux velocity, and radial growth in daily timescale was not straightforward, presumably because of the complex carbon-allocation mechanism in trees.

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Series: Agricultural and forest meteorology
ISSN: 0168-1923
ISSN-E: 1873-2240
ISSN-L: 0168-1923
Volume: 331
Article number: 109338
DOI: 10.1016/j.agrformet.2023.109338
Type of Publication: A1 Journal article – refereed
Field of Science: 1171 Geosciences
Funding: We would like to express our gratitude to the Indonesian Peatland Restoration Agency for funding of the monitoring station and sensors, WaterWorks2017 ERA-NET project WATERPEAT (Cofunded WaterPeat, project number 326848), and the KONE foundation that supported data analysis and the writing of the manuscript.
Academy of Finland Grant Number: 326848
Detailed Information: 326848 (Academy of Finland Funding decision)
Copyright information: © 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (