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

Ismail, Ismail and Haghighi, Ali Torabi and Marttila, Hannu and Karyanto, Oka and Kløve, Bjørn (2023) Recent results from an ecohydrological study of forest species in drained tropical peatlands. Agricultural and Forest Meteorology, 331. ISSN 01681923

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Abstract

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. © 2023

Item Type: Article
Additional Information: Cited by: 0; All Open Access, Hybrid Gold Open Access
Uncontrolled Keywords: Peat swamp forest Ecohydrology Water uptake Radial growth Water table
Subjects: S Agriculture > SD Forestry
Divisions: Faculty of Forestry
Depositing User: Sri JUNANDI
Date Deposited: 07 Nov 2024 08:24
Last Modified: 07 Nov 2024 08:24
URI: https://ir.lib.ugm.ac.id/id/eprint/11030

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