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Quantifying nitrate dynamics in a mesotrophic lake using triple oxygen isotopes as tracers
http://hdl.handle.net/2237/00027536
http://hdl.handle.net/2237/000275363fab8a56-e8c5-452d-8d0b-b8b56dde10b0
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
lno_10775 (930.9 kB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2018-03-28 | |||||
| タイトル | ||||||
| タイトル | Quantifying nitrate dynamics in a mesotrophic lake using triple oxygen isotopes as tracers | |||||
| 言語 | en | |||||
| 著者 |
Tsunogai, Urumu
× Tsunogai, Urumu× Miyauchi, Takanori× Ohyama, Takuya× Komatsu, Daisuke D.× Ito, Masanori× Nakagawa, Fumiko |
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| アクセス権 | ||||||
| アクセス権 | open access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
| 権利 | ||||||
| 言語 | en | |||||
| 権利情報 | This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Vertical distributions of both concentrations and stable isotopic compositions of nitrate, including the 17O‐excesses (Δ^17O), were determined four times during 1 yr within the mesotrophic water column of Lake Biwa in Japan. By using both the deposition rate of atmospheric nitrate onto the entire surface of the lake and the influx/efflux of both atmospheric and remineralized nitrate via streams reported in the literature, we quantified the annual dynamics of nitrate (gross production rate of nitrate through nitrification and gross metabolic rate of nitrate through assimilation and denitrification), together with their seasonal variations, based on the Δ^17O method. The results revealed that 642 ± 113 Mmol (Mmol = 10^6 mol) of the remineralized nitrate was supplied into the water column through nitrification in the lake on an annual basis, while 810 ± 120 Mmol of nitrate was metabolized in the lake through assimilation and denitrification. In addition, it turns out that nitrification was active, not only in the hypolimnion, but also in the epilimnion and upper thermocline in this lake. Furthermore, the total metabolic rates of nitrate varied seasonally, with the highest rates in summer and the lowest in winter. Because the difference between the annual metabolic rate of nitrate estimated based on the Δ^17O method and the annual assimilation rate of nitrate estimated based on the traditional 15N incubation method was only 20%, we concluded that the Δ^17O method reliably estimates the dynamics of nitrate in mesotrophic lakes. | |||||
| 言語 | en | |||||
| 内容記述 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | Association for the Sciences of Limnology and Oceanography | |||||
| 言語 | en | |||||
| 出版者 | ||||||
| 出版者 | Wiley | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| 出版タイプ | ||||||
| 出版タイプ | VoR | |||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
| DOI | ||||||
| 関連タイプ | isVersionOf | |||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | https://doi.org/10.1002/lno.10775 | |||||
| ISSN | ||||||
| 収録物識別子タイプ | PISSN | |||||
| 収録物識別子 | 0024-3590 | |||||
| 書誌情報 |
en : Limnology and Oceanography 巻 63, 号 S1, p. S458-S476, 発行日 2018-01-19 |
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| 著者版フラグ | ||||||
| 値 | publisher | |||||
