Litterfall

The annual litterfall was 140gCm-2y-1 (Fig. 6). Litterfall peaked in autumn (September-October); 76% of the total annual litterfall fell during this period. A small peak occurred in May, but in winter litterfall was extremely small.

f 100

0 150 300 450 600

Figure 5: Relationship between CO2 emission rate and CH4 uptake rate. Each point represents the mean of the measurements in the nine chambers. Error bars are eliminated for clarity. Open circles and broken fitting line represent a CO2 emission rate <150mgCO2m-2h-1; closed circles and solid fitting line represent a CO2 emission rate >150mgCO2m-2h-1.

-y = -1.57 + 1.45x, R2 = 0.509 -y = 198 + 0.028x, R2 = 0.005

100

1 1

-2) 80

- m

C 60

(g

all 40

•t

e

* 20

- T

May Jun Jul Aug Sep Oct Nov-Apr

Figure 6: Seasonal variation in litterfall, determined at 16 points from May 2003 to April 2004. Vertical bars represent the SD. The litterfall was

May Jun Jul Aug Sep Oct Nov-Apr

Figure 6: Seasonal variation in litterfall, determined at 16 points from May 2003 to April 2004. Vertical bars represent the SD. The litterfall was

estimated to contribute 140gCm 1

Was this article helpful?

0 0

Post a comment