Hagihara1993

Report for study: Hagihara1993

Contact Information

Data contributor: Akio Hagihara

Email: amyh@sci.u-ryukyu.ac.jp

Address:

• Laboratory of Ecology and Systematics, Faculty of Science, University of the Ryukyus, Okinawa 903-0213 Japan

Data source

Citation: Hagihara A, Yokota T and Ogawa K (1993). 'Allometric relations in hinoki (Chamaecyparis obtusa (Sieb. et Zucc.) Endl.) trees.' Bulletein of the Nagoya University Forests, 12, pp. 11-29.

DOI:

Abstract:

Overview of data provided

The dataset includes records for 25 individuals from 1 species belonging to 1 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	25	35	35	35
longitude	Longitude	deg	25	137	138	138
age	Age	yr	25	12	16	21
a.lf	Leaf area	m2	23	1.5	6.4	19
a.stba	Stem area at base	m2	25	0.0011	0.0033	0.0087
a.stbh	Stem area at breast height	m2	25	0.00095	0.0028	0.0075
h.t	Height	m	25	4.7	6.6	8.1
h.c	Height to crown base	m	23	1.2	2.3	4.5
d.ba	Basal diameter	m	25	0.038	0.065	0.1
d.bh	Dbh	m	25	0.035	0.06	0.098
h.bh	Height of d.bh measurement	m	25	1.3	1.3	1.3
c.d	Crown depth	m	23	2.6	4.1	5.6
m.lf	Leaf mass	kg	23	0.34	1.3	4
m.st	Total stem mass	kg	23	1.1	5.3	13
m.so	Aboveground mass	kg	23	1.5	7	17
m.br	Branch mass	kg	23	0.18	0.54	2.7
m.rt	Total root mass	kg	9	0.69	2.1	6.1
m.to	Total mass	kg	7	3.8	11	23

And locally within the country:

The sites sampled are:

Location	Longitude	Latitude	Vegetation
Nagoya university forest, Aichi Prefecture, central Japan	137.00	35.0	Temperate forest
Japan-Inabu Nagoya University Forest-	137.57	35.2	Temperate forest

The growing conditions of sampled plants was:

Location	growingCondition
Nagoya university forest, Aichi Prefecture, central Japan	field wild
Japan-Inabu Nagoya University Forest-	field wild

Species sampled

Species	Family	Pft
Chamaecyparis obtusa	missing	evergreen gymnosperm

Methods used

Sampling strategy: The allometric relationships between different dimensions of a hinoki (Chamaecyparis obtusa (Sieb. Et Zucc.) Endl.) tree were examined on the basis of 55 destructive samples, which were collected from four different stands and whose age ranged from 12 to 59 years. Only 24 sample trees are reported here. For the rest of 31 trees see Iijima1991, Mori1991, Nakagaki1983, Tanao1982, and Yamaji1991. Biomass and leaf area estimates were determined by the stratified clip technique, in which the stratum was 0.0-0.3 m, 0.3-1.3 m, 1.3-2.3 m, and at intervals of 1 m upward.

Leaf area: Leaf area was determined with area meters (Murayama NCE-3, Hayashi AAC-100) on subsamles and was then extrapolatied to total leaf area using specific leaf area from each stratum and summing up each stratum. Specific leaf area was estimated from a sample of leaves used for estimating the ratio of dry/fresh weight and area. Total leaf weight was measured for each stratum.

Stem cross sectional area: Stem volume (dm3) was based on stem diameters at both ends of the strata (i.e., stem diameter at strata of 0-0.3 m and at final 1 m strata at top of tree).

Height: Height was measured as the vertical distance from the ground surface to the highest apex of each tree.

Biomass: Trees were separated into roots, stems, branches and leaves, and then weighed. Sub-samples of the total fresh weight were taken and dried in ventilated ovens at 85 degC for a few days for fresh mass/dry mass estimates. The fresh biomass was converted into dry biomass estimates of roots, stem, branches and leaves per tree using the respective dry/fresh mass ratios.

Growth environment: Plantation managed.

Plots of data

This is how the study Hagihara1993 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.