From tree to plot: investigating stem CO2 efflux and its drivers along a logging gradient in Sabah, Malaysian Borneo

Mills, Maria B.; Both, Sabine; Jotan, Palasiah; Huaraca Huasco, Walter; Cruz, Rudi; Pillco, Milenka M.; Burslem, David F.R.P.; Maycock, Colin; Malhi, Yadvinder; Ewers, Robert M.; Berrio, Juan Carlos; Kaduk, Jörg; Page, Susan; Robert, Rolando; Teh, Yit A.; Riutta, Terhi ORCID: https://orcid.org/0000-0002-8308-5307. 2024 From tree to plot: investigating stem CO2 efflux and its drivers along a logging gradient in Sabah, Malaysian Borneo. New Phytologist. 13, pp. https://doi.org/10.1111/nph.20043

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Abstract/Summary

•Stem respiration constitutes a substantial proportion of autotrophic respiration in forested ecosystems, but its drivers across different spatial scales and land-use gradients remain poorly understood. This study quantifies and examines the impact of logging disturbance on stem CO2 efflux (EA) in Malaysian Borneo. •EA was quantified at tree- and stand-level in nine 1-ha plots over a logging gradient from heavily logged to old-growth using the static chamber method. •Tree-level results showed higher EA per unit stem area in logged vs old-growth plots (37.0 ± 1.1 vs 26.92 ± 1.14 g C m−2 month−1). However, at stand-level, there was no difference in EA between logged and old-growth plots (6.7 ± 1.1 vs 6.0 ± 0.7 Mg C ha−1 yr−1) due to greater stem surface area in old-growth plots. Allocation to growth respiration and carbon use efficiency was significantly higher in logged plots. Variation in EA at both tree- and stand-level was driven by tree size, growth and differences in investment strategies between the forest types. •These results reflect different resource allocation strategies and priorities, with a priority for growth in response to increased light availability in logged plots, while old-growth plots prioritise maintenance and cell structure.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	https://doi.org/10.1111/nph.20043
UKCEH and CEH Sections/Science Areas:	Hydro-climate Risks (Science Area 2017-)
ISSN:	0028-646X
Additional Information. Not used in RCUK Gateway to Research.:	Open Access paper - full text available via Official URL link.
Additional Keywords:	carbon fluxes, degraded forest, land-use, logging, stem respiration, tropical forest
NORA Subject Terms:	Ecology and Environment
Related URLs:	Dataset Dataset Dataset
Date made live:	27 Aug 2024 10:55 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/537920

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