Carbon stocks of three secondary coniferous forests along an altitudinal gradient on Loess Plateau in inland China - Fig 5

<p><b>Total C stock (a) and proportions of vegetation (b), necromass (c) and soil C stocks (d) to total C stock along the altitudinal gradient in three coniferous forests on the Loess Plateau, China.</b> LP, <i>Larix principis-rupprechtii</i> forest; PM, <i>Picea meyerii</i> forest; PT, <i>Pinus tabulaeformis</i> forest. The proportion of necromass to total C stock was log-transformed. Solid lines represent significant linear relationships between altitude and total C stock (r² = 0.56, p<0.001) and the proportion of necromass to total C stock (r² = 0.22, p<0.001) respectively across the three forests. Dotted and long dash lines represent significant linear relationships between altitude and total C stock within LP forest (r² = 0.39, p = 0.006) and PM forest (r² = 0.25, p = 0.033) respectively.