Seasonal and Interannual Variation of Soil Respiration on the Sanjiang Plain Wentlands in Northeast China

Abstract

Response of soil respiration in temperate wetlands in northeast China was studied from June 2009 to September 2011. Li-Cor 6400 infrared gas analyzer connected with a chamber was used to quantify the soil respiration. Results showed that soil respiration displayed a distinct seasonal pattern, with higher values observed in midsummer and lower values in spring and autumn. Furthermore, soil respiration exhibited a significant inter-annual variation. In addition, soil respiration presented significant positive exponential relationships with soil temperature. Whereas, significant exponential decay relationships between soil respiration rate and soil water content was found. In this ecosystem, soil temperature, soil water content and plant phenology together control soil respiration.

Spatial-Temporal Changes of Soil Respiration across China and the Response to Land Cover and Climate Change

“…In spatial terms, by applying process-based or geostatistical models, these studies use gridded data to simulate the spatial distribution of Rs within China as a whole or particular regions in China [32,35]. Temporally, by calculating the interannual mean Rs values for entire regions, they analyse the trends in Rs revealed by time series [34,36]. However, few studies combine spatially gridded data and time series data to perform deep analyses of variations in Rs.…”