@article{oai:nipr.repo.nii.ac.jp:00010199,
 author = {Noguchi, Kyotaro and Dannoura, Masako and Jomura, Mayuko and Awazuhara-Noguchi, Motoko and Matsuura, Yojiro and Noguchi, Kyotaro and Dannoura, Masako and Jomura, Mayuko and Awazuhara-Noguchi, Motoko and Matsuura, Yojiro},
 issue = {1},
 journal = {Polar science, Polar science},
 month = {Apr},
 note = {The root system of forest trees account for a significant proportion of the total forest biomass. However, data is particularly limited for forests in permafrost regions. In this study, therefore, we estimated the above- and belowground biomass of a black spruce (Picea mariana) stand underlain with permafrost in interior Alaska. Allometric equations were established using 4-6 sample trees to estimate the biomass of the aboveground parts and the coarse roots (roots >5 mm in diameter) of P. mariana trees. The aboveground biomass of understory plants and the fine-root biomass were estimated by destructive sampling. The aboveground and coarse-root biomasses of the P. mariana trees were estimated to be 3.97 and 2.31 kg m^<-2>, respectively. The aboveground biomass of understory vascular plants such as Ledum groenlandicum and the biomass of forest floor mosses and lichens were 0.10 and 0.62 kg m^<-2>, respectively. The biomass of fine roots <5 mm in diameter was 1.27 kg m^<-2>. Thus, the above- and belowground biomasses of vascular plants in the P. mariana stand were estimated to be 4.07 and 3.58 kg m^<-2>, respectively, indicating that belowground biomass accounted for 47% of the total biomass of vascular plants. Fine-root biomass was 36% of the total root biomass, of which 90% was accumulated in the surface organic layer. Thus, this P. mariana stand can be characterized as having extremely high belowground biomass allocation, which would make it possible to grow on permafrost with limited soil resource availability., 樹木の根は森林の現存量の大きな割合を占めているが、永久凍土地帯の森林ではデータが少ない。そこで、アラスカ内陸部の永久凍土上のクロトウヒ（Picea mariana）の地上部と粗大根（直径5 mm以上）の現存量を推定した結果、それぞれ3.97 kg m-2、2.31 kg m-2であった。低木類の地上部と蘚類、地衣類等の林床植生の現存量は、それぞれ0.10 kg m-2、0.62 kg m-2、直径5 mm未満の細根の現存量は1.27 kg m-2であった。これらの結果は、このクロトウヒ林では、地下部への現存量分配が極めて高く（クロトウヒ、低木類の現存量の47%）、この特性が、永久凍土上で生育するために重要であることを示唆している。},
 pages = {133--141},
 title = {High belowground biomass allocation in an upland black spruce (Picea mariana) stand in interior Alaska},
 volume = {6},
 year = {2012}
}