Carbon fluxes of an alpine peatland in Northern Italy

作者: J.W.M. Pullens , M. Sottocornola , G. Kiely , P. Toscano , D. Gianelle

DOI: 10.1016/J.AGRFORMET.2016.01.012

关键词: Eddy covarianceAtmospheric sciencesPeatClimatologySubarctic climateCarbon dioxidePrimary productionEcosystem respirationEcosystemCarbon sequestrationEnvironmental science

摘要: Abstract It is widely known that peatlands are a significant carbon (C) stock. Most located in boreal and subarctic regions of the northern hemisphere but some occur also at high altitude and, contrary to first; their contribution terms sequestration far less studied. In Alps, there numerous small peatlands, which threatened by increasing temperatures an alteration water balance. The aim this study was investigate fluxes small-scale fen Alps over three years (2012–2014). During period, peatland experienced interannual variation weather conditions while it acted as source based on CO 2 emissions (NEE: 180.7 ± 65.2 g C  m −2  yr −1 ) for all years. This mainly due short net C uptake period (73 ± 7 days) respiration. Ecosystem respiration summer gross primary production were both very compared other around world nearby low productive grassland. wintertime, soil did not freeze, resulting slow decomposition organic matter. Low methane recorded during 10-month measurement campaign, total 3.2 g C CH 4 December 2013–September 2014 period. Our findings suggest variability temperature content exert strong influence balance could further worsen depending upon magnitude climate change.

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