Chang Baoliang, Chen Wei, He Xingyuan, Yu Shuai
CAS Key Laboratory of Forest Ecology and Silviculture Institute of Applied Ecology, Chinese Academy of Sciences Shenyang China.
Liaoning Shenyang Urban Ecosystem National Observation and Research Station Shenyang China.
Ecol Evol. 2024 Aug 9;14(8):e70152. doi: 10.1002/ece3.70152. eCollection 2024 Aug.
Carbon (C), nitrogen (N), and phosphorus (P) are essential nutrients that promote plant growth and development and maintain the stability of ecosystem structure and function. Analyzing the C, N, and P characteristics of plant leaves aids in understanding the plant's nutrient status and nutrient limitation. Seasonal water-level fluctuations in riparian zones lead to various ecological problems, such as reduced biodiversity and decreased ecosystem stability. Therefore, comprehending the stoichiometric characteristics of riparian zone plants and their nutrient response to plant traits is important for a deeper insight into riparian zone forest ecosystems. This study analyzed the C, N, and P contents of the leaves of 44 woody plants in the riparian zone of the Dahuofang Reservoir to investigate the stoichiometric characteristics of C, N, and P of trees in the region. The results showed that the average C content of the leaves in woody plants was 446.9 g kg; the average N content was 28.42 g kg; and the average P content was 2.26 g kg. Compared to global and regional scales, woody plants in the riparian zone of the Dahuofang Reservoir exhibited higher N and P contents but lower N:P ratios. Compared to other riparian zones, woody plant leaves in the riparian zone of Dahuofang Reservoir had relatively high N content and N:P ratios. Variations in plant stoichiometric characteristics across different life forms were minimal, with only tree leaf P content significantly lower than its in shrubs. There was no significant correlation between leaf C, N, and P in woody plants, while specific leaf area showed a negative correlation with leaf C content. Trees in the riparian zone have high leaf N and P content and are primarily N-limited during the growing season. This study reveals the stoichiometric characteristics of leaves of woody plants in the riparian zone, which can contribute to an in-depth understanding of leaf stoichiometric patterns and the factors influencing them among plant life types in the riparian zone.
碳（C）、氮（N）和磷（P）是促进植物生长发育并维持生态系统结构和功能稳定性的必需营养元素。分析植物叶片的碳、氮、磷特征有助于了解植物的养分状况和养分限制情况。河岸带季节性水位波动会引发各种生态问题，如生物多样性降低和生态系统稳定性下降。因此，了解河岸带植物的化学计量特征及其对植物性状的养分响应，对于更深入洞察河岸带森林生态系统至关重要。本研究分析了大伙房水库河岸带44种木本植物叶片的碳、氮、磷含量，以探究该地区树木碳、氮、磷的化学计量特征。结果表明，木本植物叶片的平均碳含量为446.9 g/kg；平均氮含量为28.42 g/kg；平均磷含量为2.26 g/kg。与全球和区域尺度相比，大伙房水库河岸带的木本植物氮和磷含量较高，但氮磷比更低。与其他河岸带相比，大伙房水库河岸带木本植物叶片的氮含量和氮磷比相对较高。不同生活型植物的化学计量特征变化极小，仅树叶磷含量显著低于灌木叶。木本植物叶片的碳、氮、磷之间无显著相关性，而比叶面积与叶片碳含量呈负相关。河岸带树木叶片的氮和磷含量较高，在生长季节主要受氮限制。本研究揭示了河岸带木本植物叶片的化学计量特征，有助于深入了解河岸带植物生活型中叶片化学计量模式及其影响因素。
