树冠缺口对微气候,土壤生物活动及其关系在欧洲混合泛滥平原森林的影响
Annalena Lenk1, Ronny Richter2, Lena Kretz1
1Systematic Botany and Functional Biodiversity, Leipzig University, Johannisallee 21, 04103 Leipzig, Germany.
The Science of the total environment
|June 1, 2024
概括
森林树冠间隙增加土壤水分和温度,但不会显著改变土壤的生物活性. 温度,而不是湿度,影响了土壤生物的养活动,尽管生长季节干燥.
科学领域:
- 生态生态学 生态生态学
- 森林科学 森林科学 森林科学
- 土壤科学 土壤科学
背景情况:
- 林业或树木死亡造成的森林树冠缺口会影响地下微气候和生态系统功能,如分解.
- 气候变化越来越多地影响着森林动态,这引发了关于树冠间隙中微气候缓冲的问题.
- 在宏观气候变化下,不同间隙结构对微气候和土壤生物学的具体影响仍然不清楚.
研究的目的:
- 研究不同大小和结构的森林缺口如何影响微气候和土壤生物活动.
- 为了将这些影响与欧洲混合泛滥平原森林内的封闭树冠森林的条件进行比较.
- 了解树冠层在微气候缓冲中的作用.
主要方法:
- 研究了25个森林缺口,从单棵树的缺口到0.67公的树苗,以及相邻的封闭森林区域.
- 在2022年干旱年 (五月至十月) 监测土壤水分,土壤温度和空气温度波动.
- 通过分解速率 (茶叶,木) 评估土壤生物活性和中动物群的食活动 (诱-带).
主要成果:
- 差距的增加与较高的平均土壤湿度,土壤温度和更大的温度波动相关.
- 在夏季,与封闭森林相比,切片的表层土壤水分和温度显著更高.
- 间隙和封闭森林之间没有发现分解或中动物群养活动的显著差异,尽管养活动与土壤温度有积极的相关性.
结论:
- 研究的差距梯度内的微气候变化不足以显著影响整个土壤生物活动.
- 土壤温度似乎比土壤水分对土壤生物的养活动更有影响的因素,即使是在干旱时期.
- 森林结构,包括地下层密度,在树冠间隙内的缓冲微气候中发挥作用.
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