Data Set Citation:
When using this data, please cite the data package:
Inoue T and Shibata H.
Nitrate in forest canopies and surface soils
JaLTER-Hokkaido-Kita.326.1 (http://db.cger.nies.go.jp/JaLTER/metacat/metacat/JaLTER-Hokkaido-Kita.326.1/jalter-en)
General Information:
Title:Nitrate in forest canopies and surface soils
Identifier:JaLTER-Hokkaido-Kita.326.1
Abstract:
Nitrate concentrations and stable isotopes of nitrate of rainfall, throughfall, forest floor leachate, and soil water at a 10 cm depth of mineral soil
Keywords:
  • Stable isotopes
  • Coniferous-broadleaved mixed forest
  • Atmospheric nitrate
  • Nitrate
Data Table, Image, and Other Data Details:
Metadata download: Ecological Metadata Language (EML) File
Data Table:Nitrate concentration and Isotopic composition ( View Metadata | Download File download)

Involved Parties

Data Set Owners:
Individual: Takahiro Inoue (ja) 井上貴央
Organization: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
Address:
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
Phone:
+81-11-706-3653 / 011-706-3653 (voice)
Phone:
+81-11-706-3450 / 011-706-3450 (fax)
Email Address:
tinoue@fsc.hokudai.ac.jp
Individual: Hideaki Shibata (ja) 柴田英昭
Organization: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
Address:
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
Phone:
+81-11-706-2520 / 011-706-2520 (voice)
Phone:
+81-11-706-3450 / 011-706-3450 (fax)
Email Address:
shiba@fsc.hokudai.ac.jp
Data Set Contacts:
Individual: Takahiro Inoue (ja) 井上貴央
Organization: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
Address:
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
Phone:
+81-11-706-3653 / 011-706-3653 (voice)
Phone:
+81-11-706-3450 / 011-706-3450 (fax)
Email Address:
tinoue@fsc.hokudai.ac.jp
Individual: Hideaki Shibata (ja) 柴田英昭
Organization: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
Address:
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
Phone:
+81-11-706-2520 / 011-706-2520 (voice)
Phone:
+81-11-706-3450 / 011-706-3450 (fax)
Email Address:
shiba@fsc.hokudai.ac.jp

Data Set Characteristics

Time Period:
Begin:
2014-06-16
End:
2014-10-24

Sampling, Processing and Quality Control Methods

Step by Step Procedures
Step 1:
Description:

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.

Instrument(s): 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
Step 2:
Description:

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.

Step 3:
Description:

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).

Instrument(s): Ion chromatography (HIC-20A Super; Shimadzu Corp., Japan) Continuous-flow isotope ratio mass spectrometry (CF-IRMS) system at Nagoya University
Sampling Area And Frequency:
M3 watershed in the Uryu Experimental Forest (UREF) of Hokkaido University (44°21′ N, 142°16′ E)
Sampling Description:
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.

Data Set Usage Rights

Access Control:
Auth System:JaLTER
Order:allowFirst
Allow: [read] public
Additional Metadata
Metadata download: Ecological Metadata Language (EML) File