pH values (H 2 O and KCl) of the study sites (A–E) ranged from 3.0 to 4.5 and
from 2.5 to 4.0, respectively. The average pH (KCl) at site B was 3.7; this value was
the highest among the five sites, which had an overall average of 3.1. The Al Ex
content was higher in lower pH (KCl) soils, with a maximum of 2.5 g kg
À1 . The
average Al Ex content across all sites (A–E) was 0.58 g kg
À1 . T-C was approximately
150–300 g kg
À1 . Since the content of crude organics in soil was high at sites A
and E, the high T-C contents (>400 g kg
À1 ) observed at sites A and E may have
contained crude organics. MI and PI values were 1.9–2.3 and 0.91–1.0, respectively.
Sclerotia were present at every site under P. abies forest canopy, but sclerotia
presence was not correlated with microtopography. At most points, SGw was
Fig. 10.6 Microtopography and vegetation of sites A–C and the distribution of sclerotial biomass.
The upper diagram for each site shows the microtopography, with sampling points indicated by Â.
The bar graphs below each topographical diagram show understory vegetation (FV) (solid bars:
Dicotyledoneae; gray bars: Monocotyledoneae; open bars: lichens and Bryophyta). The third and
fourth graphs show sclerotial biomass by weight (filled circle: SGw, mg g
À1
) and count (filled
diamond: SGc, count g
À1
) of air-dried sclerotia in air-dried soil. Open circles and diamonds indicate
that no sclerotia were collected at that point. (Reproduced from Sakagami 2009)
186
M. Watanabe and N. Sakagami
from 2.5 to 4.0, respectively. The average pH (KCl) at site B was 3.7; this value was
the highest among the five sites, which had an overall average of 3.1. The Al Ex
content was higher in lower pH (KCl) soils, with a maximum of 2.5 g kg
À1 . The
average Al Ex content across all sites (A–E) was 0.58 g kg
À1 . T-C was approximately
150–300 g kg
À1 . Since the content of crude organics in soil was high at sites A
and E, the high T-C contents (>400 g kg
À1 ) observed at sites A and E may have
contained crude organics. MI and PI values were 1.9–2.3 and 0.91–1.0, respectively.
Sclerotia were present at every site under P. abies forest canopy, but sclerotia
presence was not correlated with microtopography. At most points, SGw was
Fig. 10.6 Microtopography and vegetation of sites A–C and the distribution of sclerotial biomass.
The upper diagram for each site shows the microtopography, with sampling points indicated by Â.
The bar graphs below each topographical diagram show understory vegetation (FV) (solid bars:
Dicotyledoneae; gray bars: Monocotyledoneae; open bars: lichens and Bryophyta). The third and
fourth graphs show sclerotial biomass by weight (filled circle: SGw, mg g
À1
) and count (filled
diamond: SGc, count g
À1
) of air-dried sclerotia in air-dried soil. Open circles and diamonds indicate
that no sclerotia were collected at that point. (Reproduced from Sakagami 2009)
186
M. Watanabe and N. Sakagami