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タイトル: | The crucial influence of trophic status on the relative requirement of nitrogen to phosphorus for phytoplankton growth |
著者: | Jiang, Mengqi Nakano, Shin-ichi https://orcid.org/0000-0001-5235-8547 (unconfirmed) |
著者名の別形: | 中野, 伸一 |
キーワード: | Nitrogen Phosphorus Trophic status Phytoplankton Nitrogen-to-phosphorus ratio Limiting factor |
発行日: | 15-Aug-2022 |
出版者: | Elsevier BV |
誌名: | Water Research |
巻: | 222 |
論文番号: | 118868 |
抄録: | Clarifying the pattern of relative nitrogen (N)-to-phosphorus (P) requirements for phytoplankton growth is of great significance for eutrophication mitigation and aquatic system management. The relative N-to-P requirement for phytoplankton growth is considered an essential trait determining species dominance within ecosystems and explaining phytoplankton response to nutrient availability. These requirements vary with environmental trophic status, though this variation remains unclear. Here, we evaluated the relative N-to-P requirements under different absolute nutrient levels using previous and current experimental data on eight phytoplankton species (three studied by us and five extrapolated from previous studies). Results showed that relative N-to-P requirements for phytoplankton growth decreased as absolute nutrient levels increased. Thus, N may be crucial for enhancing phytoplankton growth under low nutrient conditions, whereas P may be the primary limiting factor of phytoplankton growth under sufficient nutrient conditions. This result applies to single species as well as species assemblages, which are independent of species shifts occurring along water N:P gradients. The response observed in our large trophic status gradient may help elucidate the relative importance of N and P reductions in mitigating the impact of eutrophication on ecosystems. |
記述: | 植物プランクトンの増殖に必要な窒素とリン、どちらがより重要か? --相対的要求量と環境中の栄養塩の絶対量の関係を明らかに--. 京都大学プレスリリース. 2022-08-10. |
著作権等: | © 2022. This manuscript version is made available under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International license. The full-text file will be made open to the public on 15 August 2024 in accordance with publisher's 'Terms and Conditions for Self-Archiving'. This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。 |
URI: | http://hdl.handle.net/2433/275860 |
DOI(出版社版): | 10.1016/j.watres.2022.118868 |
PubMed ID: | 35870387 |
関連リンク: | https://www.kyoto-u.ac.jp/ja/research-news/2022-08-10-4 |
出現コレクション: | 学術雑誌掲載論文等 |
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