TY - JOUR
T1 - Spatial and temporal patterns of water-extractable organic carbon (WEOC) of surface mineral soil in a cool temperate forest ecosystem
AU - Hishi, Takuo
AU - Hirobe, Muneto
AU - Tateno, Ryunosuke
AU - Takeda, Hiroshi
N1 - Funding Information:
We thank M. Kawasaki for his comments; Dr N. Tokuchi for help with the laboratory analysis; and the staff of Ashiu Experimental Forest for giving us permission to use the study plot and for measuring the meteorological data. Financial support was partly provided by a grant from the Japanese Ministry of Education, Culture, and Sports related to a JSPS Fellowship for Japanese Young Scientists for M. Hirobe.
PY - 2004/11
Y1 - 2004/11
N2 - Water-extractable organic carbon (WEOC) drives the C and N cycles in forest ecosystems via microbial activity. However, few studies have considered both then spatial and temporal patterns of WEOC in forest soils. We investigated the spatial and temporal variation in WEOC along a topographic sequence in a cool temperate deciduous forest. The concentrations of WEOC, carbohydrates, total phenols, and other organics were 126±51, 40±15, 1.5±0.5 and 85±43 mg Ckg dry soil-1, respectively. Carbohydrates and phenols accounted for 33±11 and 1.5±1.0% of WEOC, respectively. The effect of season on the WEOC concentration was stronger than that of slope position the growing season, although most of the soil properties varied markedly with slope position. The concentration of carbohydrates in WEOC showed similar seasonal patterns across slope positions. The carbohydrate concentration peaked in May and August. The results suggest that carbohydrates are controlled by the recent production of C, rather than by organic C that has accumulated in soil.
AB - Water-extractable organic carbon (WEOC) drives the C and N cycles in forest ecosystems via microbial activity. However, few studies have considered both then spatial and temporal patterns of WEOC in forest soils. We investigated the spatial and temporal variation in WEOC along a topographic sequence in a cool temperate deciduous forest. The concentrations of WEOC, carbohydrates, total phenols, and other organics were 126±51, 40±15, 1.5±0.5 and 85±43 mg Ckg dry soil-1, respectively. Carbohydrates and phenols accounted for 33±11 and 1.5±1.0% of WEOC, respectively. The effect of season on the WEOC concentration was stronger than that of slope position the growing season, although most of the soil properties varied markedly with slope position. The concentration of carbohydrates in WEOC showed similar seasonal patterns across slope positions. The carbohydrate concentration peaked in May and August. The results suggest that carbohydrates are controlled by the recent production of C, rather than by organic C that has accumulated in soil.
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U2 - 10.1016/j.soilbio.2004.04.030
DO - 10.1016/j.soilbio.2004.04.030
M3 - Article
AN - SCOPUS:4544268437
SN - 0038-0717
VL - 36
SP - 1731
EP - 1737
JO - Soil Biology and Biochemistry
JF - Soil Biology and Biochemistry
IS - 11
ER -