| 全体的な情報: |
| タイトル: | Nitrate in forest canopies and surface soils |
| 識別子: | JaLTER-Hokkaido-Kita.326.1 |
| 要旨: |
Nitrate concentrations and stable isotopes of nitrate of rainfall, throughfall, forest floor leachate, and soil water at a 10 cm depth of mineral soil
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| キーワード: |
- Stable isotopes
- Coniferous-broadleaved mixed forest
- Atmospheric nitrate
- Nitrate
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関係者／関係団体
| データセットの所有者: |
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個人: | Takahiro Inoue
(ja)
井上貴央 |
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組織／団体: | Field Science Center for Northern Biosphere, Hokkaido University
(ja)
北海道大学北方生物圏フィールド科学センター |
|
住所: |
| N9 W9, Kita-ku, |
| Sapporo, Hokkaido 060-0809 Japan |
|
(ja)
日本 060-0809 北海道 札幌市 |
|
(ja)北区北9条西9丁目 |
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電話:
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| +81-11-706-3653 / 011-706-3653 (voice) |
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電話:
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| +81-11-706-3450 / 011-706-3450 (fax) |
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メールアドレス:
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個人: | Hideaki Shibata
(ja)
柴田英昭 |
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組織／団体: | Field Science Center for Northern Biosphere, Hokkaido University
(ja)
北海道大学北方生物圏フィールド科学センター |
|
住所: |
| N9 W9, Kita-ku, |
| Sapporo, Hokkaido 060-0809 Japan |
|
(ja)
日本 060-0809 北海道 札幌市 |
|
(ja)北区北9条西9丁目 |
|
|
電話:
|
| +81-11-706-2520 / 011-706-2520 (voice) |
|
|
電話:
|
| +81-11-706-3450 / 011-706-3450 (fax) |
|
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メールアドレス:
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| データセットの連絡先: |
|
個人: | Takahiro Inoue
(ja)
井上貴央 |
|
組織／団体: | Field Science Center for Northern Biosphere, Hokkaido University
(ja)
北海道大学北方生物圏フィールド科学センター |
|
住所: |
| N9 W9, Kita-ku, |
| Sapporo, Hokkaido 060-0809 Japan |
|
(ja)
日本 060-0809 北海道 札幌市 |
|
(ja)北区北9条西9丁目 |
|
|
電話:
|
| +81-11-706-3653 / 011-706-3653 (voice) |
|
|
電話:
|
| +81-11-706-3450 / 011-706-3450 (fax) |
|
|
メールアドレス:
|
|
|
|
個人: | Hideaki Shibata
(ja)
柴田英昭 |
|
組織／団体: | Field Science Center for Northern Biosphere, Hokkaido University
(ja)
北海道大学北方生物圏フィールド科学センター |
|
住所: |
| N9 W9, Kita-ku, |
| Sapporo, Hokkaido 060-0809 Japan |
|
(ja)
日本 060-0809 北海道 札幌市 |
|
(ja)北区北9条西9丁目 |
|
|
電話:
|
| +81-11-706-2520 / 011-706-2520 (voice) |
|
|
電話:
|
| +81-11-706-3450 / 011-706-3450 (fax) |
|
|
メールアドレス:
|
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データセットの特性
サンプリング、処理工程、品質管理の方法
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処理の手順
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| 手順 1: |
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説明:
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Sample collection
The bulk deposition was collected at one location in a large canopy gap next to the study watershed, assuming that the quantity and quality of bulk deposition would be the same across our study site.
Throughfall was collected using a PVC rain gutter which was set below understory Sasa, usually at a height of approximately 30 cm above ground.
Tension-free lysimeters were installed at the bottom of the Oa layer and at a 10 cm depth of mineral soil to collect two kinds of leaching water, i.e., forest floor leachate and soil water, respectively.
The throughfall collectors and lysimeters were installed at the halfway point between the tree trunk and canopy edge or in the middle of the canopy gap. One throughfall collector, three lysimeters for forest floor leachate, and three lysimeters for soil water were installed beneath each tree canopy and in each canopy gap.
Sample collection was conducted during rain events once in June, September, and October 2014.
The water samples were collected within three days after one to several rain events, depending on the bulk deposition amount. The collectors for rain and throughfall and the sampling bottles for all types of water samples were cleaned after each sampling event and installed again just before the next sampling.
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使用機器:
| Bulk deposition collector: a polyethylene funnel (diameter: 30 cm) attached to a polyethylene plastic bottle;
Thoroughfall collector: a PVC rain gutter (10×180 cm) attached to a polyethylene plastic bottle;
Both bulk deposition and throughfall collectors were covered with a 1 mm mesh screen to prevent litterfall and insects from entering into the plastic bottle.
Tension-free lysimeter (for forest floor leachate and soil water): a half-cut PVC column (5×20 cm) attached to a polyethylene plastic bottle |
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| 手順 2: |
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説明:
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Sample filtration and storage
The samples were filtered through pre-combusted glass microfiber filters (Whatman GF/F, GE Healthcare UK Ltd., Buckinghamshire, England) within 24 hours after collection and stored in the freezer at −15°C until analysis.
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| 手順 3: |
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説明:
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Analysis
The NO3− concentrations of the water samples were analyzed by ion chromatography.
The stable isotopic compositions of NO3− (δ15N, δ18O, and δ17O) were determined using the method that chemically converts NO3− into N2O (Tsunogai et al. 2016. Biogeosciences 13: 3441-3459).
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使用機器:
| Ion chromatography (HIC-20A Super; Shimadzu Corp., Japan)
Continuous-flow isotope ratio mass spectrometry (CF-IRMS) system at Nagoya University |
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サンプリングの領域と頻度:
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M3 watershed in the Uryu Experimental Forest (UREF) of Hokkaido University (44°21′ N, 142°16′ E)
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サンプリングの説明:
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The bulk deposition was collected at one location in a large canopy gap next to the study watershed, assuming that the quantity and quality of bulk deposition would be the same across our study site.
Throughfall was collected using a PVC rain gutter which was set below understory Sasa, usually at a height of approximately 30 cm above ground.
Tension-free lysimeters were installed at the bottom of the Oa layer and at a 10 cm depth of mineral soil to collect two kinds of leaching water, i.e., forest floor leachate and soil water, respectively.
The throughfall collectors and lysimeters were installed at the halfway point between the tree trunk and canopy edge or in the middle of the canopy gap. One throughfall collector, three lysimeters for forest floor leachate, and three lysimeters for soil water were installed beneath each tree canopy and in each canopy gap.
Sample collection was conducted during rain events once in June, September, and October 2014.
The water samples were collected within three days after one to several rain events, depending on the bulk deposition amount. The collectors for rain and throughfall and the sampling bottles for all types of water samples were cleaned after each sampling event and installed again just before the next sampling.
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データセットの利用条件
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