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タイトル: | Nitrate-use traits of understory plants as potential regulators of vegetation distribution on a slope in a Japanese cedar plantation |
著者: | Koyama, Lina https://orcid.org/0000-0002-9201-8376 (unconfirmed) Hirobe, Muneto Koba, Keisuke https://orcid.org/0000-0003-1942-9811 (unconfirmed) Tokuchi, Naoko |
著者名の別形: | 小山, 里奈 |
キーワード: | Nitrate (NO3[-]-N) nitrate reductase activity (NRA) soil NO3[-]-N availability spatial distribution understory |
発行日: | Jan-2013 |
出版者: | Springer Netherlands |
誌名: | Plant and Soil |
巻: | 362 |
号: | 1-2 |
開始ページ: | 119 |
終了ページ: | 134 |
抄録: | [Background and Aims] Plant physiological traits and their relation to soil N availability was investigated as regulators of the distribution of understory shrub species along a slope in a Japanese cedar (Cryptomeria japonica) plantation in central Japan. [Methods]At the study site, previous studies demonstrated that both net and gross soil nitrification rates are high on the lower slope and there are dramatic declines in different sections of the slope gradient. We examined the distributions of understory plant species and their nitrate (NO3[-]-N) use traits, and compared the results with the soil traits. [Results]Our results show that boundaries between different dominant understory species correspond to boundaries between different soil types. Leucosceptrum stellipilum occurs on soil with high net and gross nitrification rates. Hydrangea hirta is dominant on soil with high net and low gross nitrification rates. Pieris japonica occurs on soil with very low net and gross nitrification rates. Dominant understory species have species-specific physiological traits in their use of NO3[-]-N. Pieris japonica lacks the capacity to use NO3[-]-N as a N source, but other species do use NO3[-]-N. Lindera triloba, whose distribution is unrelated to soil NO3[-]-N availability, changes the extent to which it uses NO3[-]-N in response to soil NO3[-]-N availability. [Conclusions]Our results indicate that differences in the physiological capabilities and adaptabilities of plant species in using NO3[-]-N as a N source regulate their distribution ranges. The identity of the major form of available soil N is therefore an environmental factor that influences plant distributions. |
著作権等: | The final publication is available at www.springerlink.com 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/2433/168707 |
DOI(出版社版): | 10.1007/s11104-012-1257-9 |
出現コレクション: | 学術雑誌掲載論文等 |
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