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Data from: Positive effects of liana cutting on seedlings are reduced during El Niño-induced drought

Data from: Positive effects of liana cutting on seedlings are reduced during El Niño-induced drought
Data from: Positive effects of liana cutting on seedlings are reduced during El Niño-induced drought
1. Liana cutting is a management practice currently applied to encourage seedling regeneration and tree growth in some logged tropical forests. However, there is limited empirical evidence of its effects on forest demographic rates in Southeast Asia. 2. We used 22 four-hectare plots in the Sabah Biodiversity Experiment (a reduced impact logging site) enrichment line planted with 16 dipterocarp species to assess the effects of complete liana cutting on tree growth and survival. We compared plots where lianas were only cut along planting lines (standard enrichment line planting) with those with one (2014) or two rounds (2011 and 2014) of complete liana cutting. 3. We found increased seedling growth following the first complete liana cut in 2011 relative to the enrichment line planting, consistent with previous studies. The response after three years to the cutting in 2014 depended on whether lianas had been previously cut or not: in twice-cut plots, seedling growth was not significantly different from the standard enrichment planting controls, whereas growth in plots with only one complete cut in 2014 was significantly slower. Seedling survival decreased through time for both once- and twice-cut liana treatments but remained stable in controls. 4. Sapling growth after the 2014 liana cutting showed a similar pattern to seedling growth, while tree growth following the 2014 liana cutting was significantly lower than controls regardless of whether lianas were cut twice (2011 and 2014) or once (2014). 5. Differences in response between the two rounds of liana cutting were likely due to changes in precipitation - 2011 was followed by consistent rainfall while 2014 was followed by two severe droughts within 2 years. 6. Synthesis and applications. Our results generally support the widely-reported positive effects of liana cutting on tree growth and survival. However, reduced growth and survival after the 2015/16 El Niño suggests that drought may temporarily undermine the benefits of liana cutting in logged tropical forests. Managers of similar areas in SE Asia should consider halting liana cutting during El Niño events. In other tropical areas, seedling survival should be monitored to assess to what extent results from SE Asia are transferable.,LianaCanopyDynamicsFinalLiana density and canopy openness after liana cutting. Metadata included as sheet in excel file.SeedlingGrowthFirstCutFinalSeedling growth from 2011 to 2014. Metadata included as sheet in excel file.SeedlingGrowthSecondCutFinalSeedling growth from 2014 to 2017. Metadata included as sheet in excel file.SeedlingSurvivalFinalSeedling survival following liana cutting in 2014. Metadata included as sheet in excel file.TreeSaplingGrowthFinalTree and sapling growth following 2014 liana cutting. Metadata included as sheet in excel file.,
DRYAD
O'Brien, Michael J.
33a5d274-d1ed-4b04-b0b1-8a28633e59ac
Philipson, Christopher D.
a9aecbe6-b50e-4bd2-9ebe-f67497b74938
Reynolds, Glen
eb380c3d-218d-4dfd-9319-e2c58f34ebcb
Dzulkifli, Dzaeman
18ebdff1-3c01-4159-b8b8-5924222aec44
Snaddon, Jake L.
31a601f7-c9b0-45e2-b59b-fda9a0c5a54b
Ong, Robert
25b9afe0-cc8c-4237-88a8-0d33f3f958ef
Hector, Andy
eea8e9d4-5822-48c0-b592-0b4a47ec2fc8
O'Brien, Michael J.
33a5d274-d1ed-4b04-b0b1-8a28633e59ac
Philipson, Christopher D.
a9aecbe6-b50e-4bd2-9ebe-f67497b74938
Reynolds, Glen
eb380c3d-218d-4dfd-9319-e2c58f34ebcb
Dzulkifli, Dzaeman
18ebdff1-3c01-4159-b8b8-5924222aec44
Snaddon, Jake L.
31a601f7-c9b0-45e2-b59b-fda9a0c5a54b
Ong, Robert
25b9afe0-cc8c-4237-88a8-0d33f3f958ef
Hector, Andy
eea8e9d4-5822-48c0-b592-0b4a47ec2fc8

O'Brien, Michael J., Philipson, Christopher D., Reynolds, Glen, Dzulkifli, Dzaeman, Ong, Robert and Hector, Andy (2019) Data from: Positive effects of liana cutting on seedlings are reduced during El Niño-induced drought. DRYAD doi:10.5061/dryad.2sq2d9m [Dataset]

Record type: Dataset

Abstract

1. Liana cutting is a management practice currently applied to encourage seedling regeneration and tree growth in some logged tropical forests. However, there is limited empirical evidence of its effects on forest demographic rates in Southeast Asia. 2. We used 22 four-hectare plots in the Sabah Biodiversity Experiment (a reduced impact logging site) enrichment line planted with 16 dipterocarp species to assess the effects of complete liana cutting on tree growth and survival. We compared plots where lianas were only cut along planting lines (standard enrichment line planting) with those with one (2014) or two rounds (2011 and 2014) of complete liana cutting. 3. We found increased seedling growth following the first complete liana cut in 2011 relative to the enrichment line planting, consistent with previous studies. The response after three years to the cutting in 2014 depended on whether lianas had been previously cut or not: in twice-cut plots, seedling growth was not significantly different from the standard enrichment planting controls, whereas growth in plots with only one complete cut in 2014 was significantly slower. Seedling survival decreased through time for both once- and twice-cut liana treatments but remained stable in controls. 4. Sapling growth after the 2014 liana cutting showed a similar pattern to seedling growth, while tree growth following the 2014 liana cutting was significantly lower than controls regardless of whether lianas were cut twice (2011 and 2014) or once (2014). 5. Differences in response between the two rounds of liana cutting were likely due to changes in precipitation - 2011 was followed by consistent rainfall while 2014 was followed by two severe droughts within 2 years. 6. Synthesis and applications. Our results generally support the widely-reported positive effects of liana cutting on tree growth and survival. However, reduced growth and survival after the 2015/16 El Niño suggests that drought may temporarily undermine the benefits of liana cutting in logged tropical forests. Managers of similar areas in SE Asia should consider halting liana cutting during El Niño events. In other tropical areas, seedling survival should be monitored to assess to what extent results from SE Asia are transferable.,LianaCanopyDynamicsFinalLiana density and canopy openness after liana cutting. Metadata included as sheet in excel file.SeedlingGrowthFirstCutFinalSeedling growth from 2011 to 2014. Metadata included as sheet in excel file.SeedlingGrowthSecondCutFinalSeedling growth from 2014 to 2017. Metadata included as sheet in excel file.SeedlingSurvivalFinalSeedling survival following liana cutting in 2014. Metadata included as sheet in excel file.TreeSaplingGrowthFinalTree and sapling growth following 2014 liana cutting. Metadata included as sheet in excel file.,

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More information

Published date: 1 January 2019

Identifiers

Local EPrints ID: 449264
URI: http://eprints.soton.ac.uk/id/eprint/449264
PURE UUID: 0d6f962d-50c1-46ac-9804-90576453ecca
ORCID for Jake L. Snaddon: ORCID iD orcid.org/0000-0003-3549-5472

Catalogue record

Date deposited: 20 May 2021 16:35
Last modified: 21 May 2021 01:46

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Contributors

Creator: Michael J. O'Brien
Creator: Christopher D. Philipson
Creator: Glen Reynolds
Creator: Dzaeman Dzulkifli
Contributor: Jake L. Snaddon ORCID iD
Creator: Robert Ong
Creator: Andy Hector

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