Tange2010

Report for study: Tange2010

Contact Information

Data contributor: Takeshi Tange

Email: [email protected]

Address:

• Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, 113-8657, Japan

Data source

Citation: Tange T and Kojima K (2010). 'Aboveground biomass data of Anno growth monitoring stands of Cryptomeria japonica in the University Forest in Chiba, The University of Tokyo.' Technical Report 49, Miscellaneous information, the Tokyo University Forests.

DOI:

Abstract:

Overview of data provided

The dataset includes records for 7 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	7	35	35	35
longitude	Longitude	deg	7	140	140	140
age	Age	yr	7	91	91	91
a.stbh	Stem area at breast height	m2	7	0.032	0.084	0.23
h.t	Height	m	7	20	25	29
h.c	Height to crown base	m	7	16	17	20
d.bh	Dbh	m	7	0.2	0.33	0.54
h.bh	Height of d.bh measurement	m	7	1.3	1.3	1.3
c.d	Crown depth	m	7	2.9	8.1	11
m.lf	Leaf mass	kg	7	8.4	27	78
m.st	Total stem mass	kg	6	137	362	1052
m.so	Aboveground mass	kg	6	146	385	1129
m.br	Branch mass	kg	7	6.6	18	86

And locally within the country:

The sites sampled are:

Location	Longitude	Latitude	Vegetation
Japan-Chiba Forest of Tokyo University-Anno 1	140.1	35.2	Temperate forest
Japan-Chiba Forest of Tokyo University-Anno 2	140.1	35.2	Temperate forest

The growing conditions of sampled plants was:

Location	growingCondition
Japan-Chiba Forest of Tokyo University-Anno 1	plantation managed
Japan-Chiba Forest of Tokyo University-Anno 2	plantation managed

Species sampled

Species	Family	Pft
Cryptomeria japonica	Taxodiaceae	evergreen gymnosperm

Methods used

Sampling strategy: Sampling was conducted in two 91-year old Cryptomeria japonica plantations (Anno1 and Anno2 in sub-compartment C5, compartment 2) located on almost flat fluvial terrace in the University Forests in Chiba, the University of Tokyo (Tange and Kojima 2010). No thinning was conducted in the past 40 years. Tree density was 1230 and 1120 trees per hector for Anno1 and Anno2, respectively. Mean stem diameter at breast height and mean tree height were 27 cm and 19 m for Anno1, and 31 cm and 23 m for Anno2. Three trees from Anno1 and four from Anno2 were selected including dominant, average, and suppressed trees. Sample trees were cut at ground level in April 1993. Sample trees were then treated with the stratified clip technique by cutting them into parts contained in horizontal layers of 0-0.3 m, 0.3-1.3 m, and at intervals of 2 m upward.

Stem cross sectional area: Estimated from stem diameter.

Height: Measured by measuring tape after the trees were felled.

Biomass: Fresh mass of leaves, branches, and stem were measured separately for each layer and tree (Tange and Kojima 2010). Green branches with diameter > 5 mm were categorized as branches and those =< 5 mm as leaves. Subsamples were collected for each component, each layer, and each tree and were oven-dried at 80 degree C. For stem subsample, a disk of 3-5 cm thickness was collected from the lower end of each stem segment. The dry-to-fresh mass ratios of these subsamples were used to calculate total dry mass of each tree component from fresh mass.

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.

Plots of data

This is how the study Tange2010 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.