title: Pyrosequencing analysis on the bacteria within the permafrost soil along CRCOP
organism: soil metagenome
description: The samples were taken from four different permafrost soils with different distributions along the China-Russia Crude Oil Pipeline. Samples were collected in the winter of 2009, when the pipeline trench was open for construction. These four sites are all permafrost-affected wetlands, but differ in the distribution and thermal stability of permafrost. Samples were generally taken in three different horizons, i.e., the upper and bottom of the active layer, and the permafrost table as well. Sample names Location Horizons Depth(cm) Date when taken 1300 Walagan upper active layer 20-30 11/15/2009 1500  bottom of active layer 70-80 11/15/2009 1600  permafrost table 150-160 11/15/2009 2300 Walagan North upper active layer 20-30 11/16/2009 2500  bottom of active layer 70-80 11/16/2009 2600  permafrost table 130-140 11/16/2009 3300 Tayuan upper active layer 30-40 11/17/2009 3500  bottom of active layer 80-90 11/17/2009 3600  permafrost table 120-130 11/17/2009 4300 Jagedaqi upper active layer 30-40 11/17/2009 4500  bottom of active layer 70-80 11/17/2009 4600  permafrost table 140-150 11/17/2009  