Root-derived CO2 flux from a tropical peatland

Girkin, N. T. and Turner, B. L. and Ostle, N. and Sjögersten, S. (2018) Root-derived CO2 flux from a tropical peatland. Wetlands Ecology and Management, 26 (5). pp. 985-991. ISSN 0923-4861

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Abstract

Tropical peatlands release significant quantities of greenhouse gases to the atmosphere, yet the relative contributions of heterotrophic and autotrophic respiration to net CO2 fluxes remains sparsely quantified. We used a combination of in situ trenching and vegetation removal in ex situ pots to quantify root-derived CO2 under two plant functional types within a mixed species forest. Trenching significantly reduced surface CO2 flux, indicating that approximately two-thirds of the released CO2 was derived from roots. In contrast, ex situ vegetation removal in pots indicated that root-derived CO2 accounted for 27% of the total CO2 flux for Campnosperma panamensis, a broadleaved evergreen tree, and 49% for Raphia taedigera, a canopy palm. The results show that root-derived CO2 is a major contribution to net CO2 emissions in tropical peatlands, and that the magnitude of the emissions is affected by plant species composition. This is important in the context of land use change driving alterations in vegetation cover.

Item Type:
Journal Article
Journal or Publication Title:
Wetlands Ecology and Management
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2300/2308
Subjects:
ID Code:
127088
Deposited By:
Deposited On:
24 Aug 2018 13:40
Refereed?:
Yes
Published?:
Published
Last Modified:
30 Sep 2020 08:06