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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Root-derived CO2 flux from a tropical peatland
AU - Girkin, N. T.
AU - Turner, B. L.
AU - Ostle, N.
AU - Sjögersten, S.
PY - 2018/10
Y1 - 2018/10
N2 - 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.
AB - 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.
KW - Tropical peat
KW - Carbon dioxide
KW - Soil respiration
KW - Root respiration
KW - Trenching
KW - LOWLAND NEOTROPICAL PEATLANDS
KW - SOIL RESPIRATION
KW - CH4 FLUXES
KW - RHIZOSPHERE RESPIRATION
KW - CARBON STORAGE
KW - FOREST
KW - LITTER
KW - DECOMPOSITION
KW - TEMPERATURE
KW - PROFILES
U2 - 10.1007/s11273-018-9617-8
DO - 10.1007/s11273-018-9617-8
M3 - Journal article
AN - SCOPUS:85049798574
VL - 26
SP - 985
EP - 991
JO - Wetlands Ecology and Management
JF - Wetlands Ecology and Management
SN - 0923-4861
IS - 5
ER -