Root-derived CO2 flux from a tropical peatland
| Autor: | Nick Ostle, N. T. Girkin, Sofie Sjögersten, Benjamin L. Turner |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Canopy
Peat 010504 meteorology & atmospheric sciences biology Context (language use) 04 agricultural and veterinary sciences Vegetation Management Monitoring Policy and Law Aquatic Science Evergreen Atmospheric sciences biology.organism_classification 01 natural sciences Atmosphere 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Environmental science Land use land-use change and forestry Ecology Evolution Behavior and Systematics Campnosperma 0105 earth and related environmental sciences |
| Zdroj: | Wetlands Ecology and Management. 26:985-991 |
| ISSN: | 1572-9834 0923-4861 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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