Negative soil respiration fluxes in unneglectable arid regions

• Autorzy: Wang W. , Chen X. , Pu Z. , Yuan X. , Ma J.
• Języki publikacji: EN

Abstrakty

EN

This study examines the hypothesis that soil respiration fluxes are always positive, neglecting negative fluxes in arid regions that characterize more than 30% of Earth’s total land area. To cut down uncertainty, we focus on non-vegetated areas at a typical, large arid region (Central Asia). Soil respiration fluxes were reconciled as a direct sum of influxes (CO₂ fluxes entering soils) and effluxes (CO₂ fluxes released from soils). It was indicated that the annual average of effluxes was only 8% higher than that of influxes in 1979-2011. At typically alkaline sites (soil pH>9.5), extreme local annual average of soil respiration fluxes are negative. Therefore, negative soil respiration fluxes in arid regions are unneglectable. Although the soil respiration flux is useful as a measure of CO₂ effluxes from the soils and CO₂ influxes to the soils, its value as a measure of ecosystem processes is very much limited.

• Wydawca: -
• Czasopismo: Polish Journal of Environmental Studies
• Rocznik: 2015
• Tom: 24
• Numer: 2
• Opis fizyczny: p.905-908,fig.,ref.

Twórcy

autor

Wang W.

• State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, 830011, China

autor

Chen X.

• State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, 830011, China

autor

Pu Z.

• College of Computer and Information Engineering, Xinjiang Agricultural University, Urumqi 830052, China

autor

Yuan X.

• State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, 830011, China

autor

Ma J.

• State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, 830011, China

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Identyfikatory

DOI

10.15244/pjoes/23878