Spatiotemporal Heterogeneity of Soil Water Content at Different Size of Gaps of Pinus koraiensis-Dominated Broadleaved Mixed Forest Geostatistical analysis on spatiotemporal distribution pattern of soil water content of forest gap in Pinus koraiensis dominated broadleaved mixed forest Spatiotemporal distribution patterns of photosynthetic photon flux density, air temperature, and relative air humidity in forest gap of Pinus koraiensis-dominated broadleaved mixed forest in Xiao Xing’an Mountains.