核受精和干扰对亚北极生态系统产生长期的复杂遗产
Outi H Manninen1, Eero Myrsky2, Anne Tolvanen3
1Arctic Centre, University of Lapland, Pohjoisranta 4, 96100, Rovaniemi, Finland. ohmanninen@gmail.com.
Oecologia
|March 13, 2024
概括
缩和干扰显著改变亚北极植物群落,对植被和土壤的影响持续超过15年. 这些对原生态系统的综合影响凸显了长期的生态变化.
科学领域:
- 生态生态学 生态生态学
- 环境科学 环境科学
- 植物社区动态 植物社区动态
背景情况:
- 亚北极生态系统面临着日益增加的 (N) 丰富和干扰.
- 结合的丰富和干扰可能会严重影响植物群落.
- 关于这些影响的长期持久性,实验数据有限.
研究的目的:
- 调查化肥和干扰对亚北极植物群落的长期影响.
- 为了检查植被和土壤变化的持久性,在几十年的时间范围内.
- 了解营养丰富和干扰对生态系统恢复的相互作用影响.
主要方法:
- 化肥的实验应用 (40公斤尿素-N ha-1年-1年4年) 和干扰 (植物和有机土壤的去除).
- 在一个亚北极森林-原生态环境中的两个植物群体中进行的研究.
- 在N受精停止后15年和干扰后18年,植物群体重新分析.
主要成果:
- 无论是N-fertilization还是干扰,都增加了叶灌木和草,减少了常青灌木.
- 结合治疗最初加剧了效果,导致了更大的花粉素增加.
- 植被变化,特别是较高的花粉素丰度和较低的血管植物总量,在干扰后的18年内持续存在;土壤N动态显示了持久的变化.
结论:
- 丰富和干扰对亚北极植被的影响持续了几十年.
- 干扰18年后,植物群体的组成稳定了下来,仅干扰和组合治疗后的情况也相似.
- 复杂的植物-土壤相互作用继续影响亚北极生态系统对不同时间尺度的多重干扰的反应.
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