Suzuki2012
Data contributor: Kaichiro Sasa, Kentaro Takagi
Email: sasa@fsc.hokudai.ac.jp, kentt@fsc.hokudai.ac.jp
Address:
- Field Science Center for Northern Biosphere, Hokkaido University, Kita11, Nishi10, Kita-ku, Sapporo, Hokkaido, 060-0811, Japan
- Teshio Experimental Forest, Field Science Center for Northern Biosphere, Hokkaido University, Horonobe, 098-2943, Japan
Citation: Suzuki H (2012). Estimation of aboveground and belowground carbon stock in a forest of Northern Hokkaido. Master's thesis, Hokkaido University, Japan.
DOI:
Abstract:
The dataset includes records for 40 individuals from 9 species belonging to 7 family(ies), presenting 2 functional type(s), growing in 1 condition(s) within 1 major type(s) of habitat, with data included for the following variables:
| Variable | Label | Units | N | Min | Median | Max |
|---|---|---|---|---|---|---|
| latitude | Latitude | deg | 40 | 45 | 45 | 45 |
| longitude | Longitude | deg | 40 | 142 | 142 | 142 |
| a.stbh | Stem area at breast height | m2 | 40 | 0.000028 | 0.0036 | 0.19 |
| h.t | Height | m | 40 | 1.5 | 5 | 20 |
| d.bh | Dbh | m | 40 | 0.006 | 0.068 | 0.49 |
| h.bh | Height of d.bh measurement | m | 40 | 1.3 | 1.3 | 1.3 |
| m.lf | Leaf mass | kg | 17 | 0.02 | 0.37 | 28 |
| m.st | Total stem mass | kg | 19 | 0.2 | 10 | 1242 |
| m.so | Aboveground mass | kg | 36 | 0.22 | 7.4 | 1269 |
| m.br | Branch mass | kg | 20 | 0.1 | 2 | 646 |
| m.rt | Total root mass | kg | 40 | 0.1 | 2.5 | 430 |
| m.to | Total mass | kg | 36 | 0.32 | 9.7 | 1699 |
And locally within the country:
The sites sampled are:
| Location | Longitude | Latitude | Vegetation |
|---|---|---|---|
| Japan-Teshio Experimental Forest of Hokkaido University- | 142.12 | 45.05 | Temperate forest |
The growing conditions of sampled plants was:
| Location | growingCondition |
|---|---|
| Japan-Teshio Experimental Forest of Hokkaido University- | field wild |
| Species | Family | Pft |
|---|---|---|
| Picea glehnii | Pinaceae | evergreen gymnosperm, deciduous angiosperm |
| Betula ermanii | Betulaceae | evergreen gymnosperm, deciduous angiosperm |
| Hydrangea paniculata | Saxifragaceae | evergreen gymnosperm, deciduous angiosperm |
| Abies sachalinensis | Pinaceae | evergreen gymnosperm, deciduous angiosperm |
| Picea jezoensis | Pinaceae | evergreen gymnosperm, deciduous angiosperm |
| Viburnum furcatum | Caprifoliaceae | evergreen gymnosperm, deciduous angiosperm |
| Acanthopanax sciadophylloides | Araliaceae | evergreen gymnosperm, deciduous angiosperm |
| Acer mono | Aceraceae | evergreen gymnosperm, deciduous angiosperm |
| Quercus crispula | Fagaceae | evergreen gymnosperm, deciduous angiosperm |
Sampling strategy: The study was conducted in a natural deciduous broadleaf and evergreen conifer mixed forest at the Teshio Experimental Forest, Hokkaido University (Takagi et al. 2010). Forest floor was covered with dense dwarf bamboo. Canopy height was 20 m. A quadrate (15 times 15 m) was created (Suzuki 2012). Diameter at breast height and tree crown width were measured for all trees within the quadrate before the trees were felled. Roots of all trees were excavated at the soil depth of 0 to 70 cm. The soil on roots was completely washed away by spraying water with a compressor. Fine roots were not collected. Multiple-stemmed trees were excluded for this data paper.
Stem cross sectional area: Estimated from stem diameter.
Height: Measured after trees were cut down.
Biomass: The fresh mass of each organ (trunk, branches, leaves, and roots) was weighed. For evergreen conifer species (Abies sachalinensis and Picea jezoensis), fresh mass of trunk, branches without leaves, branches with leaves, and roots was weighed. Measured fresh mass was converted to dry mass from the ratio of dry to fresh mass. The ratio was estimated from subsample taken from each tree and each organ. A disk of ca. 3 cm thick was taken from the base, middle, and near top heights of trunk for a sampled tree with the DBH > 0.1 m and the fresh mass was measured. For trees with the DBH < 0.1 m, one disk for each tree was obtained at the base of the trunk. Each disk was oven-dried at 70-80 degree C until there was no change in the mass, and the dry mass was measured. The trunk dry mass was then estimated by multiplying its fresh mass by the average dry to fresh mass ratio of the disk samples for each tree. For branches, coarse roots, leaves, (and branches with leaves for coniferous trees), one fresh subsample of > 2 kg (typically 3-6 kg) taken from several heights or depths for each tree was weighed when the total fresh mass of each organ was > 5 kg, while all the sample was used for the subsample when the total fresh mass was < 5 kg. The subsamples were oven-dried at 70-80 degree C until there was no change in the mass. The dry mass was estimated by multiplying the fresh mass by the dry to fresh mass ratio of the subsample for each organ for each tree.
Other variables: Species name and family names were converted by M.I. Ishihara according to the following references: Satake Y, Hara H (1989a) Wild flower of Japan Woody plants I (in Japanese). Heibonsha, Tokyo; Satake Y, Hara H (1989b) Wild flower of Japan Woody plants II (in Japanese). Heibonsha, Tokyo.
This is how the study Suzuki2012 fits in the entire dataset (grey). each colour represents a species. A legend of species names with colours is included at the end for reports with 1 < n < 20 species.
