Figure 2: Locations of sampling sites.

Black dots are location of sampling sites. Green-shaded portions are Quercus wutaishanica forest in the Loess Plateau. The map is made by ArcGIS 10.2 software, http://www.arcgis.com/features/.

Black dots are location of sampling sites. Green-shaded portions are Quercus wutaishanica forest in the Loess Plateau. The map is made by ArcGIS 10.2 software, http://www.arcgis.com/features/.