Abstract
Nitrous oxide (N2O) is an important greenhouse gas, and the riparian marsh plays an important role in modulating atmospheric concentrations of N2O. To investigate the effects of environmental variables on spatiotemporal variations of N2O fluxes in the pristine riparian marsh, the static chamber-GC techniques were used to explore the spatiotemporal variations of N2O fluxes in Calamagrostis angustifolia swamp meadow marsh (CASMM), Ecotone wetland (EW) and Carex Schmidtii Meinsh. marsh (CSMM) along the pristine riparian in Sanjiang Plain during one year. During non-growing season (October, 2015 to April, 2016), the variability of N2O fluxes in the three marshes were not significantly different (P > 0.05). However, during growing season (May to October, 2016), both variability differences of N2O fluxes between CSMM and EW, and between CSMM and CASMM were significant (P < 0.01). Atmospheric temperature, soil NH4+-N content and soil volumetric moisture content were the driving factors during non-growing season. During growing season, soil NH4+-N and NO3−-N content were the driving factors among interactions of multiple environmental variables. CASMM and EW became the sinks of N2O during non-growing season but converted to the source of N2O during growing season. However, CSMM became all sink of N2O during every season.
from Energy Ecology Environment Ambio via Terpsi Hori on Inoreader https://ift.tt/2EyIdvA
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Medicine by Alexandros G. Sfakianakis,Anapafseos 5 Agios Nikolaos 72100 Crete Greece,00302841026182,00306932607174,alsfakia@gmail.com,