Vernal soil respiration of Larix gmelinii Rupr. forests transplanted from a latitudinal transect Establishment of an Integrated Assessment System on Cold Resistance of Poplars at the Seedling Stage Vernal soil respiration of five temperate forests in Northeastern China Characteristics of Temperature, Soil Freezing and Thawing, and River Flow in Pailugou Watershed of Qilian Mountains Ecophysiological characteristics of leaves and fine roots in dominant tree species in a subalpine coniferous forest of western Sichuan during seasonal frozen soil period Physiological and ecological effects of freezing and thawing processes on microorganisms in seasonally-froze ground and in permafrost