Differential soil respiration responses to changing hydrologic regimes

作者：Pacific Vincent J^*; McGlynn Brian L; Riveros Iregui Diego A; Epstein Howard E; Welsch Daniel L

来源：Water Resources Research, 2009, 45(7): W07201.

DOI：10.1029/2009WR007721

Soil respiration is tightly coupled to the hydrologic cycle (i.e., snowmelt and precipitation timing and magnitude). We examined riparian and hillslope soil respiration across a wet (2005) and a dry (2006) growing season in a subalpine catchment. When comparing the riparian zones, cumulative CO(2) efflux was 33% higher, and peak efflux occurred 17 days earlier during the dry growing season. In contrast, cumulative efflux in the hillslopes was 8% lower, and peak efflux occurred 10 days earlier during the drier growing season. Our results demonstrate that soil respiration was more sensitive to drier growing season conditions in wet (riparian) landscape positions.

• 出版日期2009-7-15