Table 1 Means of nitrate, phosphate, and sulfate concentrations in surface and subsurface flow water collected downslope from large-wood, mixed-slash, and small-slash piles. Samples were collected immediately downslope from piles (Adjacent), 7 m downslope (7 m), and in unburned areas not influenced by piles (Control). Collection dates included one month prior to burning (pre-burn), 6 months after burning (2010), and 18 months after burning (2011). Due to damage to collectors in the field, the number of samples at some sites were limited and no SE was calculated.

Overland flow — pre-burn

Large wood

1.2 (1.0)

<0.1¹

<0.1¹

2.3 (1.7)

1.0 (1.6)

<0.1

2.9 (0.9)

1.8 (0.2)

1.2

Mixed slash

1.0 (1.0)

<0.1

<0.1

<0.1

<0.1

<0.1

1.3 (0.2)

1.4 (0.3)

0.3

Small slash

0.6 (0.6)

0.9(0.9)

<0.1

<0.1

<0.1

<0.1

3.5 (1.9)

1.9 (0.5)

0.3

Overland flow — 6 months

Large wood

ns²

ns

ns

ns

ns

ns

ns

ns

ns

Mixed slash

0.2 (0.04)

0.3 (0.12)

0.2 (0.0)

1.4 (0.97)

0.1 (0.0)

0.7 (0.0)

5.2 (4.0)

1.1(0.1)

1.2

Small slash

5.4 (0.2)

2.1

0.8

0.4 (0.01)

0.9 (0.8)

0.6

7.1 (5.5)

0.9 (0.2)

1.5

Overland flow — 18 months

Large wood

9.2 (6.8)

1.7 (5.6)

5.8 (5.0)

4.1 (3.3)

7.4 (2.5)

1.2 (0.03)

2.2 (1.0)

0.5 (0.2)

1.3 (0.6)

Mixed slash

5.7 (3.9)

2.8 (2.5)

1.7 (0.4)

1.5 (0.7)

2.0 (0.1)

1.7 (0.3)

1.1 (0.5)

0.8 (0.3)

0.9 (0.1)

Small slash

4.9 (1.4)

8.7 (7.9)

3.0 (1.4)

1.9 (0.3)

2.7 (1.6)

1.5 (0.2)

1.8 (0.3)

1.2 (0.6)

2.8 (1.6)

Subsurface flow — 18 months

Large wood

2.4 (1.4)

2.0 (1.1)

<0.1

0.9 (0.4)

1.0 (0.4)

0.5

2.2 (0.5)

2.8 (0.7)

0.4

Mixed slash

1.1 (0.8)

1.5 (0.9)

3.3 (3.1)

3.0 (1.3)

1.0 (0.6)

0.8 (0.8)

5.7 (1.7)

4.2 (0.9)

1.1 (0.6)

Small slash

5.4 (2.3)

0.9 (0.3)

ns

1.7 (0.1)

5.3 (5.4)

ns

8.3 (3.5)

3.1 (1.0)

ns