森林干扰和引入的类动物对北极森林碳储存的影响
Rachael Moran1, Shawn J Leroux1, Yolanda F Wiersma1
1Department of Biology, Memorial University of Newfoundland, St. John's, Newfoundland and Labrador, Canada.
Ecological applications : a publication of the Ecological Society of America
|September 23, 2025
概括
森林干扰对碳储存的影响显著,远远超过北极森林中的鹿草食. 虽然干扰减少了碳,但长期排除后,鹿的影响是可变的,并且在统计学上没有显著意义.
科学领域:
- 生态生态学 生态生态学
- 林业林业 林业 林业 林业
- 气候科学 气候科学
背景情况:
- 类选择性浏览对森林结构和构成产生影响,特别是在受干扰或新型环境中.
- 在干扰后,草食对北极森林中碳储存的影响尚不清楚.
- 了解这些影响对于气候智能生态系统管理至关重要.
研究的目的:
- 确定非本土鹿和常见的北极森林干扰 (火灾,昆虫爆发) 对碳储存的影响.
- 评估加拿大纽芬兰的全部,地面和地下碳库存.
- 为生态系统管理策略提供有关类动物影响和森林干扰的信息.
主要方法:
- 进行了观察性和实验性实地研究,使用配对的排斥-控制图片 (24-27岁).
- 测量了46个地块的树木,枯木,灌木,树苗,草本植物,地面植被和根的碳储量.
- 分析了森林垃圾和有机土壤层的碳含量;使用了通用线性模型来评估干扰和食草效应.
主要成果:
- 成熟森林的总碳储量最高,明显高于受昆虫扰乱或被烧毁的地区.
- 在被破坏的森林中,地面的碳储存减少了.
- 排除结果显示平均碳储量高于对照,但鹿的存在对碳储量没有统计学上显著的长期影响;鹿密度和碳储量之间没有发现关系.
结论:
- 森林干扰是北极生态系统碳储存变化的主要驱动因素.
- 鹿草食对碳储存的影响是高度可变的,并且不如干扰效应那么重要.
- 未来的研究应该集中在具有一致的类动物管理和长期数据的地区,并纳入植物社区数据以了解草食动态.
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