Ecological Stoichiometry Characteristic of Phytoplankton in Mountain Stream

IF 3 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Water Pub Date : 2024-09-08 DOI:10.3390/w16172541

Li Ji, Huayong Zhang, Zhongyu Wang, Wang Tian, Yonglan Tian, Zhao Liu

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Abstract

This research investigated the phytoplankton ecological stoichiometry characteristics and the balance of the relationship between elements in a mountain river in a cold region. The samples of phytoplankton of four seasons were collected in May 2020, August 2020, November 2020, and February 2021 from the Taizicheng River in Chongli, Zhangjiakou City, China. We determined the contents of carbon (C), nitrogen (N), phosphorus (P), sulfur (S), hydrogen (H), and iron (Fe), and analyzed their ecological stoichiometric characteristics and correlation. Our results showed that the contents of C, N, P, S, H, and Fe in phytoplankton were 82.14 ± 32.12 g/kg, 9.22 ± 3.5 g/kg, 1.46 ± 0.55 g/kg, 1.96 ± 0.86 g/kg, 2.36 ± 1.36 g/kg, and 12.64 ± 10.57 g/kg, respectively. Generally, the contents of C, N, and P were relatively stable, while the contents of S, H, and Fe fluctuated greatly, and the coefficient of variation of Fe content was as high as 83.62%. The elemental molar composition of phytoplankton in the Taizicheng River is C156.00N15.41S1.54H51.17Fe5.10P, which showed a significant difference compared with the classical Redfield ratio C106N16P. The high proportion of element C indicated that phytoplankton in the Taizicheng River have a high demand for C and a strong ability to consolidate C. The ratio of N:P was consistent with previous research results. The N:P ratio of phytoplankton in the Taizicheng River was 15.41, suggesting that the growth of phytoplankton in the Taizicheng River was restricted by both N and P. The contents of C, N, and P were positively correlated, while there was no significant correlation among S, H, and Fe. C:P was significantly positively correlated with C:N and N:P, while there were no strong correlations between C:N and C:P, as well as H:S, Fe:S, and H:Fe, indicating that the coupling correlation between phytoplankton elements was different and C, N, and P were highly correlated as important phytoplankton nutrient elements. This study contributes to our understanding of the phytoplankton ecological stoichiometry characteristics and the limiting factors of nutrients in a mountain river and provides a scientific basis for further ecological conservation and management efforts.

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山涧浮游植物的生态化学计量特征

本研究探讨了寒冷地区山地河流浮游植物生态平衡特征及各元素之间的平衡关系。分别于 2020 年 5 月、2020 年 8 月、2020 年 11 月和 2021 年 2 月在张家口市崇礼太子城河采集了四个季节的浮游植物样品。我们测定了碳（C）、氮（N）、磷（P）、硫（S）、氢（H）和铁（Fe）的含量，并分析了它们的生态平衡特征和相关性。结果表明，浮游植物中 C、N、P、S、H 和 Fe 的含量分别为 82.14 ± 32.12 g/kg、9.22 ± 3.5 g/kg、1.46 ± 0.55 g/kg、1.96 ± 0.86 g/kg、2.36 ± 1.36 g/kg 和 12.64 ± 10.57 g/kg。一般来说，C、N 和 P 的含量相对稳定，而 S、H 和 Fe 的含量波动较大，Fe 含量的变异系数高达 83.62%。太子城河浮游植物的元素摩尔组成为 C156.00N15.41S1.54H51.17Fe5.10P，与经典的雷德菲尔德比值 C106N16P 相比差异显著。C元素比例高，说明台子河浮游植物对C元素需求量大，固碳能力强；N:P比例与前人研究结果一致。太子城河浮游植物的 N:P 比值为 15.41，表明太子城河浮游植物的生长受到 N 和 P 的双重限制。C:P与C:N和N:P呈显著正相关，而C:N与C:P以及H:S、Fe:S和H:Fe之间没有很强的相关性，说明浮游植物元素之间的耦合相关性不同，C、N和P作为重要的浮游植物营养元素具有很强的相关性。该研究有助于我们了解山区河流浮游植物生态化学计量学特征和营养元素的限制因子，为进一步开展生态保护和管理工作提供了科学依据。

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来源期刊

Water WATER RESOURCES-

CiteScore

5.80

自引率

14.70%

发文量

3491

审稿时长

19.85 days

期刊介绍： Water (ISSN 2073-4441) is an international and cross-disciplinary scholarly journal covering all aspects of water including water science and technology, and the hydrology, ecology and management of water resources. It publishes regular research papers, critical reviews and short communications, and there is no restriction on the length of the papers. Our aim is to encourage scientists to publish their experimental and theoretical research in as much detail as possible. Full experimental and/or methodical details must be provided for research articles. Computed data or files regarding the full details of the experimental procedure, if unable to be published in a normal way, can be deposited as supplementary material.