Kenzo2009b
Data contributor: Tanaka Kenzo
Email: [email protected]
Address:
- Bureau of International Partnership, Forestry and Forest Products Research Institute, Tsukuba, Ibaraki, 305-8687, Japan
Citation: Kenzo T, Furutani R, Hattori D, Kendawang J, Tanaka S, Sakurai K and Ninomiya I (2009). 'Allometric equations for accurate estimation of above-ground biomass in logged-over tropical rainforests in Sarawak, Malaysia.' Journal of Forest Research, 14(6), pp. 365-372.
DOI: 10.1007/s10310-009-0149-1
Abstract: Although allometric equations can be used to accurately estimate biomass and/or carbon stock in forest ecosystems, few have been developed for logged-over tropical rainforests in Southeast Asia. We developed allometric relationships between tree size variables (stem diameter at breast height (dbh) and tree height) and leaf, branch, stem and total above-ground biomass in two logged-over tropical rainforests with different soil conditions in Sarawak, Malaysia. The study sites were originally classified as mainly lowland dipterocarp forest and have been selectively logged in the past 20 years. In total, 30 individuals from 27 species were harvested to measure above-ground parts. The correlation coefficients for the allometric relationships obtained for total above-ground biomass as a function of dbh had high values (0.99), although the relationships for leaf biomass had a relatively low coefficient (0.83). We also found relatively high coefficients for allometric relationships between tree height and plant-part biomass, ranging from 0.82 to 0.97. Moreover, there were no differences for allometric equations of total above-ground biomass between study sites. A comparison of equations of above-ground biomass in various previously reported tropical rainforests and pan-tropic general equations imply that our allometric equations differ largely from the equations for tropical primary forests, early successional secondary forest, and even for the general models. Therefore, choosing the biomass estimation models for above-ground biomass in the logged-over forests of Southeast Asia requires careful consideration of their suitability.
The dataset includes records for 52 individuals from 28 species belonging to 16 family(ies), presenting 1 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 | 52 | 0.92 | 1.1 | 3.6 |
| longitude | Longitude | deg | 52 | 111 | 111 | 114 |
| a.lf | Leaf area | m2 | 27 | 0.015 | 0.18 | 87 |
| a.stba | Stem area at base | m2 | 22 | 0.00002 | 0.000045 | 0.00086 |
| a.stbh | Stem area at breast height | m2 | 30 | 0.000079 | 0.0095 | 0.15 |
| h.t | Height | m | 52 | 0.41 | 3.5 | 40 |
| h.c | Height to crown base | m | 18 | 0.11 | 0.43 | 1.4 |
| d.ba | Basal diameter | m | 22 | 0.005 | 0.0076 | 0.033 |
| d.bh | Dbh | m | 30 | 0.01 | 0.11 | 0.44 |
| h.bh | Height of d.bh measurement | m | 52 | 1.3 | 1.3 | 1.3 |
| c.d | Crown depth | m | 18 | 0.18 | 0.35 | 0.79 |
| m.lf | Leaf mass | kg | 52 | 0.0013 | 0.15 | 52 |
| m.st | Total stem mass | kg | 52 | 0.0019 | 0.57 | 1036 |
| m.so | Aboveground mass | kg | 52 | 0.0032 | 0.9 | 1088 |
| m.br | Branch mass | kg | 25 | 0.02 | 12 | 356 |
| m.rt | Total root mass | kg | 22 | 0.00089 | 0.0029 | 0.29 |
| m.to | Total mass | kg | 22 | 0.0041 | 0.019 | 2.2 |
| ma.ilf | Leaf mass per area | kg m-2 | 27 | 0.068 | 0.068 | 0.089 |
| r.st | Wood density | kg m-3 | 48 | 210 | 345 | 900 |
And locally within the country:
The sites sampled are:
| Location | Longitude | Latitude | Vegetation |
|---|---|---|---|
| Sabal Forest Reserve, Sarawak, Malaysia | 110.9167 | 1.0500000 | Tropical rainforest |
| Balai Ringin Protected Forest | 110.7167 | 0.9166667 | Tropical rainforest |
| Niah Forest Reserve, Sarawak Malaysia | 113.7000 | 3.6500000 | Tropical rainforest |
The growing conditions of sampled plants was:
| Location | Grouping | growingCondition |
|---|---|---|
| Sabal Forest Reserve, Sarawak, Malaysia | location = Sabal Forest Reserve, Sarawak, Malaysia; contributor = Kenzo 2009 | field wild |
| Balai Ringin Protected Forest | location = Balai Ringin Protected Forest; contributor = Kenzo 2009 | field wild |
| Balai Ringin Protected Forest | location = Balai Ringin Protected Forest; contributor = Kenzo 2004 | field wild |
| Niah Forest Reserve, Sarawak Malaysia | location = Niah Forest Reserve, Sarawak Malaysia; contributor = Kenzo 2004 | field wild |
| Species | Family | Pft |
|---|---|---|
| Unknown sp. 1 | Anacardiaceae | evergreen angiosperm |
| Unknown sp. 2 | Anacardiaceae | evergreen angiosperm |
| Alphonsea johorensis | Annonaceae | evergreen angiosperm |
| Unknown | Annonaceae | evergreen angiosperm |
| Santiria apiculata | Burseraceae | evergreen angiosperm |
| Kokoona ovatolanceolata | Celastraceae | evergreen angiosperm |
| Garcinia penangiana | Clusiaceae | evergreen angiosperm |
| Dryobalanops beccarii | Dipterocarpaceae | evergreen angiosperm |
| Shorea andulensis | Dipterocarpaceae | evergreen angiosperm |
| Shorea cf. stenoptera | Dipterocarpaceae | evergreen angiosperm |
| Shorea parvifolia | Dipterocarpaceae | evergreen angiosperm |
| Macaranga costulata | Euphorbiaceae | evergreen angiosperm |
| Macaranga trachyphylla | Euphorbiaceae | evergreen angiosperm |
| Endospermum cf. diadenum | Euphorbiaceae | evergreen angiosperm |
| Litsea castanea | Lauraceae | evergreen angiosperm |
| Litsea cauliflora | Lauraceae | evergreen angiosperm |
| Aglaia affinis | Meliaceae | evergreen angiosperm |
| Aglaia bernardoi | Meliaceae | evergreen angiosperm |
| Walsura pinnata | Meliaceae | evergreen angiosperm |
| Xylocarpus sp. | Meliaceae | evergreen angiosperm |
| Ficus sp. | Moraceae | evergreen angiosperm |
| Endocomia rufirachis | Myristicaceae | evergreen angiosperm |
| Xanthophyllum stipitatum | Polygalaceae | evergreen angiosperm |
| Adina sp. | Rubiaceae | evergreen angiosperm |
| Arytera littoralis | Sapindaceae | evergreen angiosperm |
| Adinandra dumosa | Theaceae | evergreen angiosperm |
| Trema sp. | Ulmaceae | evergreen angiosperm |
| Shorea ovata | Dipterocarpaceae | evergreen angiosperm |
Sampling strategy: All trees were harvested to measure all plant parts variables.
Stem cross sectional area: The area was calculated from stem diameter including bark
Height: Tree height was defined as the length from ground to the apex of the tallest shoot.
Biomass: Total fresh weight was measured in the field and representative subsamples were dried at 80degC for at least 72h to determine dry biomass.
Traits: Species traits were defined from flora record and our observations.
Growth environment: Growth environment was defined from our observations.
Year collected: 2001-2003
Acknowledgements: I. Ninomiya, K. Sakurai, J. J. Kendawang and D. Hattori
This is how the study Kenzo2009b 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.
