| 生态系统氮磷比化学计量特征研究进展 |
| |
| 引用本文： | 邬畏,何兴东,周启星.生态系统氮磷比化学计量特征研究进展[J].中国沙漠,2010,30(2):296-302. |
| |
| 作者姓名： | 邬畏 何兴东 周启星 |
| |
| 作者单位： | 1. 南开大学,生命科学学院,天津,300071
2. 南开大学,环境科学与工程学院,天津,300071 |
| |
| 摘 要： | 通过对国内外关于氮磷比化学计量特征研究文献的大量阅读,总结了在陆地生态系统和水域生态系统中氮磷比化学计量特征的意义。在陆地生态系统中,土壤中的氮磷比与固氮共生体及非共生体的生物固氮量呈反比例关系;土壤中的氮磷比化学计量特征发生变化会影响植被动态;土壤中氮磷比化学计量特征的变化对物种多样性及生产力产生影响,尤其是磷限制濒危物种的生产力及丰富度;植物体中的氮磷比化学计量特征可以体现氮和磷两种营养元素的供应状况及相对有效性,对植被恢复和濒危物种管理工作起到重要作用。在水域生态系统中,水体中的氮磷比与水生生物的固氮量呈反比例关系,并且会影响水生植物的生长及水生生物群落的组成。
|
| 关 键 词： | 氮磷比 化学计量特征 陆地生态系统 水域生态系统 |
| 收稿时间： | 2008-9-25 |
| 修稿时间： | 2009-1-14 |
Review on N:P Stoichiometry in Eco-system |
| |
| WU Wei,HE Xing-dong,ZHOU Qi-xing.Review on N:P Stoichiometry in Eco-system[J].Journal of Desert Research,2010,30(2):296-302. |
| |
| Authors: | WU Wei HE Xing-dong ZHOU Qi-xing |
| |
| Institution: | WU Wei1,HE Xing-dong1,ZHOU Qi-xing2(1.College of Life Sciences,Nankai University,Tianjin 300071,China,2.College of Environmental Science and Engineering,China) |
| |
| Abstract: | The significance of the N∶P stoichiometry in terrestrial and aquatic ecosystems was determined on the basis of the literatures in domestic and abroad.In the terrestrial ecosystems, there is an inverse relationship between soil N∶P ratio and the nitrogen-fixing amount of symbiotic associations and non-symbiotic associations;soil N∶P ratio can affect vegetation dynamics as well as the biodiversity and productivity of the ecosystems.Especially, the phosphorus amount would restrict the productivity and richness of threatened species.Plant N∶P ratio can reflect the nutrient conditions and the relative availability of nitrogen and phosphorus, so it is an important index for vegetation restoration and threaten species protection.In the aquatic ecosystems, there is also an inverse relationship between water N∶P ratio and the nitrogen-fixing amount of aquatic organisms, also the water N∶P ratio can influence the growth of aquatic organisms and the composition of aquatic community. |
| |
| Keywords: | nitrogen/phosphorus ratio stoichiometry terrestrial ecosystem aquatic ecosystem |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《中国沙漠》浏览原始摘要信息 |
| 点击此处可从《中国沙漠》下载免费的PDF全文 |
|
