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Data Set Citation:
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When using this data, please cite the data package:
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Uryu Experimental Forest, 雨龍研究林 .
Tree census, Long-term observation plot No.11, Uryu Experimental Forest, North Hokkaido Experimental Forest (JaLTER), Japan, 1990-2010, 毎木調査, 長期観察林番号11号, 雨龍研究林, 北海道北研究林（JaLTER）
jalter_hokkaido_kita_17.5.1
(https://db.cger.nies.go.jp/JaLTER/metacat/metacat/jalter_hokkaido_kita_17.5.1/jalter-en)
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| General Information: |
| Title: | Tree census, Long-term observation plot No.11, Uryu Experimental Forest, North Hokkaido Experimental Forest (JaLTER), Japan, 1990-2010, 毎木調査, 長期観察林番号11号, 雨龍研究林, 北海道北研究林（JaLTER） |
| Identifier: | jalter_hokkaido_kita_17.5.1 |
| Abstract: |
Betula platyphylla Sukaczev var. japonica (Miq.) H.Hara secodary forest has been investigated to examine its stand structure and dynamicsextraction. A study plot with area 0.25-ha was introduced in 1990, followed by repeated tree censuses (5 or 10year interval))., 北海道大学雨龍研究林109林班シラカバ二次林の林分構成・伐採率等とその後の生長量の推移に関する調査.
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| Keywords: |
- long-term
- permanent plot
- Uryu
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Involved Parties
| Data Set Owners: |
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Individual: | Uryu Experimental Forest, 雨龍研究林 |
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Organization: | Forest Research Station, Field Science Center for Northern Biosphere, Hokkaido University, 北海道大学北方生物圏フィールド科学センター森林圏ステーション |
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Address: |
| Moshiri, 母子里, |
| Horokanai, 幌加内, Hokkaido, 北海道 074-0741 Japan, 日本 |
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| Data Set Contacts: |
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Individual: | Uryu Experimental Forest, 雨龍研究林 |
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Organization: | Forest Research Station, Field Science Center for Northern Biosphere, Hokkaido University, 北海道大学北方生物圏フィールド科学センター森林圏ステーション |
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Address: |
| Moshiri, 母子里, |
| Horokanai, 幌加内, Hokkaido, 北海道 074-0741 Japan, 日本 |
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Data Set Characteristics
| Geographic Region: |
| Geographic Description: | Plot No.11, compartment 109 in the Uryu Experimental Forest, 雨龍研究林109林班 長期観察林番号11 |
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Bounding Coordinates:
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| West: | 0.0 degrees
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| East: | 0.0 degrees
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| North: | 0.0 degrees
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| South: | 0.0 degrees
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Sampling, Processing and Quality Control Methods
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Step by Step Procedures
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| Step 1: |
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Description:
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Location, 位置
The study plot is located in compartment 109 of the Uryu Experimental Forest., 調査地は雨龍研究林109林班に位置する. The size of the study plot is 2500m2 (50×50 m; N00 00 00, E000 00 00; N00 00 00, E000 00 00; N00 00 00, E000 00 00; N00 00 00, E000 00 00 ).
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| Step 2: |
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Description:
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Targets to measure,測定対象
The census targeted trees with diameter at breast height (1.3 m) equal to or larger than 10-cm in the plot. Trees were identified by metal plate, and their species names were recorded., 調査区内の胸高直径10cm以上の樹木を対象とした. 金番で個体識別し、樹種名を記録した.
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| Step 3: |
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Description:
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Girth at breast height, 胸高直径
From 1990 to 2000, diameter at breast height was measured with a caliper., 測定対象木の胸高直径を輪尺を用いて計測（1990年から2000年まで）.
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Instrument(s):
| scale, 輪尺 |
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| Step 4: |
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Description:
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Girth at breast height(Diameter at breast height), 胸高周囲長（胸高直径）
Since 2010,girth at breast height was measured with a steel tape., 測定対象木の胸高周囲長をコンベックスを用いて計測（2010年以降）.
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Instrument(s):
| steel tape, コンベックス |
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Description:
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Height 1, 樹高 1
From 1990 to 2000, tree height was measured by observation with a scale pole., 測定対象木の樹高を測桿ポールを用いて計測（1990年から2000年まで）.
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Instrument(s):
| scale pole, 測桿ポール |
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| Step 6: |
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Description:
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Height 2, 樹高 2
Since 2010,Tree height was measured by observation with a hypsometer., 測定対象木の樹高を超音波測高器を用いて計測（2010年以降）.
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Instrument(s):
| hypsometer, 超音波測高器 |
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| Step 7: |
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Height of the crown base, 枝下高
Height of the crown base was measured by observation with a scale pole., 測定対象木の枝下高を測桿ポールを用いて計測.
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Instrument(s):
| scale pole, 測桿ポール |
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Crown width, 樹冠幅
Crown width was measured with a tape measure toward the 0, 90, 180 and 270-degree direction from the base., 測定対象木の樹冠幅を巻尺を用いて東西南北4方向について計測.
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Instrument(s):
| tape measure, 巻尺 |
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Grade of wood quality 2, 樹幹級
Code indication grade of wood quality, applied for coniferous forests. 1: overstory trees with good wood quality 2: overstory trees with unstraight stem or a sign of death, decay or weakening, or those interrupt a better tree. 3: understory trees, which is expectable to continue good growth. 4: suppressed understory trees. 5: understory trees with unstraight stem or a sign of death, decay or weakening., 樹幹級区分は針葉樹林に適用する。1: 上層木の中での優良木 2: 上層木の中でのあばれ木・樹冠過弱木・樹冠偏奇木・分岐木・被害木 3: 下層木の中での良木（将来良好な生育が見込まれるもの） 4: 下層木の中での被圧木 5: 下層木の中での生育衰退木・倒木・枯損木・傾斜木
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Survival, 生枯
Survival of the target trees was confirmed by observation., 測定対象木の生死を確認.
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Details of wood damage, 測定対象木の欠点を記録
Special instructions on wood damage.
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| Step 12: |
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Description:
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Details of wood quality, 測定対象木の被害を記録
Special instructions on wood quality.
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Data Set Usage Rights
| Data users are required to place an acknowledgement in any publication in which the data are used, and to send a copy of the publication with an usage report., 公表にあたっては、データの出典を謝辞等に明記するとともに、成果品および利用報告を提出する. |
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