Reproductive height determines the loss of clonal grasses with nitrogen enrichment in a temperate grassland.

IF 0.1 Q4 CHEMISTRY, MULTIDISCIPLINARY Journal of Computer Chemistry-Japan Pub Date : 2023-04-28 eCollection Date: 2024-03-01 DOI:10.1016/j.pld.2023.04.003
Xu Chen, Haining Lu, Zhengru Ren, Yuqiu Zhang, Ruoxuan Liu, Yunhai Zhang, Xingguo Han
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Abstract

Tall clonal grasses commonly display competitive advantages with nitrogen (N) enrichment. However, it is currently unknown whether the height is derived from the vegetative or reproductive module. Moreover, it is unclear whether the height of the vegetative or reproductive system regulates the probability of extinction and colonization, and determines species diversity. In this study, the impacts on clonal grasses were studied in a field experiment employing two frequencies (twice a year vs. monthly) crossing with nine N addition rates in a temperate grassland, China. We found that the N addition decreased species frequency and increased extinction probability, but did not change the species colonization probability. A low frequency of N addition decreased species frequency and colonization probability, but increased extinction probability. Moreover, we found that species reproductive height was the best index to predict the extinction probability of clonal grasses in N-enriched conditions. The low frequency of N addition may overestimate the negative effect from N deposition on clonal grass diversity, suggesting that a higher frequency of N addition is more suitable in assessing the ecological effects of N deposition. Overall, this study illustrates that reproductive height was associated with the clonal species extinction probability under N-enriched environment.

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繁殖高度决定了温带草原上克隆草在氮富集条件下的损失。
高大的丛生禾本科植物通常在氮素(N)富集的情况下显示出竞争优势。然而,目前还不清楚高度是来自无性繁殖模块还是生殖模块。此外,目前还不清楚无性繁殖系统或生殖系统的高度是否调节物种灭绝和殖民的概率,以及是否决定物种多样性。本研究在中国温带草地进行了一项田间试验,采用两种频率(每年两次与每月一次)和九种氮添加率,研究了氮添加对克隆草的影响。我们发现,氮添加降低了物种频率,增加了物种灭绝概率,但没有改变物种定殖概率。低的氮添加频率降低了物种频率和定殖概率,但增加了物种灭绝概率。此外,我们发现物种繁殖高度是预测富氮条件下克隆草灭绝概率的最佳指标。较低的氮添加频率可能会高估氮沉积对克隆草多样性的负面影响,这表明较高的氮添加频率更适合评估氮沉积的生态效应。总之,本研究表明,在富氮环境下,繁殖高度与克隆物种灭绝概率有关。
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来源期刊
Journal of Computer Chemistry-Japan
Journal of Computer Chemistry-Japan CHEMISTRY, MULTIDISCIPLINARY-
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PEMETAAN LOKASI RAWAN KRIMINALITAS PADA SATRESKRIM POLRES ASAHAN DECISION SUPPORT SYSTEM PRIORITAS PEMBANGUNAN JALAN DIDESA SEI ALIM ULU DENGAN METODE TOPSIS PENERAPAN ELECTRONIC CRM BERBASIS WEB PADA DIANID COLLECTION Reproductive height determines the loss of clonal grasses with nitrogen enrichment in a temperate grassland. 電子を描く(12) ― 炭素原子のsp3, sp2, sp混成軌道
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