古尔班通古特沙漠水热梯度变化对短命植物生态化学计量特征影响

肖钰鑫; 王明明; 郭惠安; 彭港澳; 庄伟伟

doi:10.11913/PSJ.2095-0837.2022.40492

古尔班通古特沙漠水热梯度变化对短命植物生态化学计量特征影响

肖钰鑫^1,2,
王明明^1,2,
郭惠安^1,2,
彭港澳^1,2,
庄伟伟^1,2, ,

1. 新疆师范大学生命科学学院, 乌鲁木齐 830054;
2. 中亚区域有害生物联合控制国际研究中心, 新疆特殊环境物种保护与调控生物学实验室, 干旱区植物逆境生物学实验室, 乌鲁木齐 830054

基金项目:

新疆维吾尔自治区重点实验室开放课题(2021D04003)

新疆维吾尔自治区自然科学基金(2021D01A123)

新疆特殊环境物种多样性应用与调控重点实验室开放课题(XJTSWZ-2022-02)

国家自然科学基金(42007092)。

详细信息

作者简介:
肖钰鑫(1999-),女,硕士研究生,研究方向为干旱区植物生理生态(E-mail:1620820306@qq.com)。

通讯作者:
庄伟伟,E-mail:zww8611@sina.com

中图分类号: S718.5
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出版历程
- 收稿日期: 2021-12-08
- 修回日期: 2022-02-12
- 网络出版日期: 2022-10-31
- 发布日期: 2022-08-27

Changes in ecological stoichiometry of two ephemeral plants with a hydrothermal gradient in the Gurbantünggüt Desert

1. College of Life Sciences, Xinjiang Normal University, Urumqi 830054, China;
2. International Research Center for the Collaborative Containment of Cross-Border Pests in Central Asia, Xinjiang Key Laboratory of Special Species Conservation and Regulatory Biology, Key Laboratory of Plant Stress Biology in Arid Land, Urumqi 830054, China

Funds:

This work was supported by grants from the Key Laboratory Opening Project of Xinjiang Uygur Autonomous Region (2021D04003),Natural Science Foundation of Xinjiang Uygur Autonomous Region (2021D01A123)，Open Project of Key Laboratory of Special Environment Biodiversity Application and Regulation in Xinjiang (XJTSWZ-2022-02),and National Natural Science Foundation of China (42007092).

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摘要

摘要: 以古尔班通古特沙漠2种优势短命植物尖喙牻牛儿苗(Erodium oxyrhinchum M. Bieb.)和东方旱麦草(Eremopyrum orientale (L.) Jaubert & Spach)为研究对象，通过盆栽控制实验，设定2个温度梯度以及3个水分梯度，对它们在不同温、湿度处理下的C、N、P含量及其化学计量比的变化特点进行分析。结果显示：(1)温度显著影响尖喙牻牛儿苗的N、P、C∶P、N∶P以及东方旱麦草的C、N、P、C∶N、N∶P；水分显著影响2种短命植物的N、P、C∶N、C∶P以及东方旱麦草的N∶P，其中N含量随温度的变化符合温度-生物地球化学假说，而P含量随温度的变化符合温度-植物生理假说。(2)温度和水分的交互作用对2种植物的影响表现为：在高温处理时，随着水分梯度的增加，2种植物的N、P含量先升高再下降，C∶N、C∶P、N∶P先下降再升高；在低温处理时，尖喙牻牛儿苗的N、P含量变化与水分梯度呈反比，C∶P变化与水分梯度呈正比，而东方旱麦草化学计量变化差异不显著。(3)相关性分析结果表明，温度和水分显著影响2种短命植物各元素之间的相关关系，植物的生长速率和养分限制情况受营养元素的主导调控也随之变化。
- 温度 /
- 水分 /
- 生态化学计量 /
- 短命植物 /
- 古尔班通古特沙漠
Abstract: Two dominant ephemeral plants, i.e., Erodium oxyrhinchum M. Bieb. and Eremopyrum orientale (L.) Jaubert & Spach, from the Gurbantünggüt Desert were used for potted plant experiments under controlled conditions. We set two temperature gradients and three moisture gradients to analyze variation characteristics in carbon (C), nitrogen (N), and phosphorus (P) contents and their stoichiometric ratios under different temperature and humidity treatments. Results show that: (1) Temperature significantly affected N, P contents, C∶P, and N∶P in Erodium oxyrhinchum, and C, N, P, C∶N, and N∶P in Eremopyrum orientale. Water significantly affected N, P, C∶N, and C∶P in both plants and N∶P in Eremopyrum orientale. The changes in N content with temperature conformed to the temperature-biogeochemical hypothesis, while the changes in P content with temperature conformed to the temperature-plant physiology hypothesis. (2) Interactions between temperature and water also affected the plants. Under high temperature treatment, as the water gradient increased, N and P contents in both plants first increased and then decreased, while C∶N, C∶P, and N∶P first decreased and then increased. Under low temperature treatment, changes in N and P contents in Erodium oxyrhinchum were inversely proportional to the water gradient, while changes in C∶P were directly proportional to the water gradient. However, the stoichiometric changes in Eremopyrum orientale were not significant. (3) Correlation analysis showed that temperature and water significantly affected element correlations in both plants, and the growth rates and nutrient limitations of the plants were also subject to dominant regulation of the nutrient elements.
- Temperature /
- Water /
- Ecological stoichiometry /
- Ephemeral plants /
- Gurbantü

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