Table 2 Empirical example of over-estimation bias and black C formation from down wood inventory, using data from stand-replacement portions of the 2002 Biscuit Fire, Oregon. Portions of the Biscuit Fire re-burned an area that had burned 15 years prior, in the 1987 Silver Fire.
From: Quantifying Char in Postfire Woody Detritus Inventories
Burn history | Timelag class (h) | Un-corrected mass (kg ha−1) | Char-corrected mass (kg ha−1) | Overestimation bias (%) | Black C formation (kg ha−1) |
|---|---|---|---|---|---|
Single stand-replacing fire [n = 25 plots] | 1 | 261 | 246 | 5.9 | 4.6 |
10 | 681 | 598 | 13.9 | 26.7 | |
100 | 1 170 | 982 | 19.2 | 64.7 | |
1000 | 2 074 | 1 947 | 6.5 | 40.0 | |
>1000 | 29 613 | 29 100 | 1.8 | 164.0 | |
Two successive stand-replacing fires [n = 25 plots] | 1 | 109 | 89.2 | 22.0 | 6.3 |
10 | 786 | 608 | 29.2 | 57.0 | |
100 | 2 789 | 2 353 | 18.6 | 150.0 | |
1000 | 6 356 | 5 721 | 11.1 | 200.2 | |
>1000 | 23 589 | 22 831 | 3.3 | 241.7 |