TY - JOUR
T1 - Fire history influences on the spatial heterogeneity of soil nitrogen transformations in three adjacent stands in a dry tropical forest in Thailand
AU - Hirobe, Muneto
AU - Tokuchi, Naoko
AU - Wachrinrat, Chongrak
AU - Takeda, Hiroshi
N1 - Funding Information:
We would like to thank Dr. K. Koba for his suggestions on an earlier draft of this paper, T. Toda for permitting us to use the unpublished data on vegetation. Dr. H. Barclay for his comments on this paper, the staff and students of the Faculty of Forestry, Kasetsert University and the staff of the Sakaerat Environmental Research Station, Thailand, for their assistance in the field and in the laboratory. Two anonymous reviewers improved this paper substantially. Drs. H. Tsuno and T. Hidaka helped with laboratory analyses, and Dr. N. Ohte provided assistance on the geostatistical analyses. This research was supported by the Japan Ministry of Education, Science, Sports and Culture through its Creative Basic Research (No. 09NP1501). Financial support was also provided in part by JSPS Research Fellowships for Japanese Young Scientists (No. 02489).
PY - 2003/2
Y1 - 2003/2
N2 - Spatial patterns of soil nitrogen (N) transformations were examined using geostatistical analysis in three adjacent stands with different fire history (0, 10 and 35 years since the latest fire, respectively) in a dry tropical forest in Thailand. A larger pool of total inorganic N and a faster rate of N mineralization were recorded in the stand with longer fire prevention. At the spatial scale analyzed, the proportion of spatially dependent variance to the total variance of N mineralization and nitrification increased from 0.39 to 0.73, and from 0.40 to 0.77, respectively, with the time since the latest fire. The spatial autocorrelation ranges of N mineralization and nitrification decreased from ≥9.0 to 3.28 m, and ≥9.0 to 2.77 m, respectively, with the time since the latest fire. These results suggested that fire history affected not only the level of available soil N, but also the spatial heterogeneity of soil N transformations, presumably due to the difference in plant influences on soil.
AB - Spatial patterns of soil nitrogen (N) transformations were examined using geostatistical analysis in three adjacent stands with different fire history (0, 10 and 35 years since the latest fire, respectively) in a dry tropical forest in Thailand. A larger pool of total inorganic N and a faster rate of N mineralization were recorded in the stand with longer fire prevention. At the spatial scale analyzed, the proportion of spatially dependent variance to the total variance of N mineralization and nitrification increased from 0.39 to 0.73, and from 0.40 to 0.77, respectively, with the time since the latest fire. The spatial autocorrelation ranges of N mineralization and nitrification decreased from ≥9.0 to 3.28 m, and ≥9.0 to 2.77 m, respectively, with the time since the latest fire. These results suggested that fire history affected not only the level of available soil N, but also the spatial heterogeneity of soil N transformations, presumably due to the difference in plant influences on soil.
KW - Dry tropical forest
KW - Fire
KW - Geostatistics
KW - Soil nitrogen transformations
KW - Spatial heterogeneity
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U2 - 10.1023/A:1022804326662
DO - 10.1023/A:1022804326662
M3 - Article
AN - SCOPUS:0038242958
SN - 0032-079X
VL - 249
SP - 309
EP - 318
JO - Plant and Soil
JF - Plant and Soil
IS - 2
ER -