Forest management and former land use have no effect on soil fungal diversity in uneven-aged mountain high forests

IF 2.5 3区 农林科学 Q1 FORESTRY Annals of Forest Science Pub Date : 2024-01-02 DOI:10.1186/s13595-023-01218-3
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引用次数: 0

Abstract

Key message

Metabarcoding analysis of soil fungal communities in French mountain forests revealed that harvesting intensity, time since last harvest and former land use had no effect on fungal community composition compared to key abiotic factors. Low-intensity management in these uneven-aged mountain forests therefore has limited effects on soil fungal community composition which is mainly driven by elevation and edaphic properties.

Context

Past and current human activities are known to affect forest biodiversity. However, the effects of former land use and forest management have been studied much more extensively on higher plants than on fungi.

Aims

Our objectives were to assess the effects of harvesting intensity, duration since last harvest and former land use on soil fungal communities in uneven-aged mountain high forests.

Methods

On the basis of historical land-use maps drawn between 1862 and 1864 and on historical forest management archives, we selected 62 sites in the French Alps with contrasting land-use histories (ancient forests, which were already forested on historical maps vs recent forests, which have recovered following abandonment of pastures) and different durations since last harvest (from 1 to over 50 years). We carried out soil sampling and assessed fungal diversity by metabarcoding analysis. We analysed soil fungal molecular operational taxonomic units (MOTU) diversity as a whole and for the main lifestyle groups (such as wood saprotrophic or ectomycorrhizal fungi) using multiple linear regressions on Shannon’s diversity index and fungal taxonomic composition using canonical correlation analysis.

Results

We found no significant effect of harvesting intensity, time since last harvest or land-use history on total fungal MOTU diversity, fungal lifestyle diversity or taxonomic composition. In contrast, we observed significant effects of elevation, pH, organic carbon and available phosphorus content on the taxonomic and functional composition of soil fungal communities.

Conclusions

The structure of soil fungal communities (i.e. diversity and species composition) was mainly determined by elevation and edaphic factors, indicating a high-context dependency, as previously found in similar studies. Our study in mountain forests shows that recent forests established on former pastures had no legacy effect on soil conditions and fungal communities, in contrast to previous results in lowland areas, where recent forests were mainly established on former cropland. Uneven-aged forest management had no effect on fungal diversity, in contrast to previous results observed in even-aged high forests.

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森林管理和以前的土地利用对不均匀年龄的高山森林土壤真菌多样性没有影响
摘要 对法国山地森林土壤真菌群落的元条码分析表明,与关键的非生物因素相比,采伐强度、上次采伐后的时间和以前的土地利用对真菌群落组成没有影响。因此,在这些树龄不均的山林中进行低强度管理对土壤真菌群落组成的影响有限,而土壤真菌群落组成主要受海拔高度和自然环境的影响。 背景 众所周知,过去和现在的人类活动都会影响森林生物多样性。然而,对以前土地利用和森林管理对高等植物的影响的研究要比对真菌的研究广泛得多。 目的 我们的目标是评估采伐强度、最后一次采伐后的持续时间以及以前的土地使用情况对不均匀树龄的高山森林土壤真菌群落的影响。 方法 根据 1862 年至 1864 年绘制的历史土地利用地图和历史森林管理档案,我们在法国阿尔卑斯山选择了 62 个具有不同土地利用历史(历史地图上已经成林的古森林与牧场废弃后恢复的新森林)和不同采伐持续时间(从 1 年到 50 多年)的地点。我们进行了土壤采样,并通过代谢编码分析评估了真菌多样性。我们利用香农多样性指数和真菌分类组成的多重线性回归分析了土壤真菌分子操作分类单元(MOTU)的整体多样性和主要生活方式群体(如木质嗜液真菌或外生菌根真菌)的多样性。 结果 我们发现,采伐强度、上次采伐后的时间或土地使用历史对真菌 MOTU 总多样性、真菌生活方式多样性或分类组成没有明显影响。相反,我们观察到海拔、pH 值、有机碳和可利用磷含量对土壤真菌群落的分类和功能组成有明显影响。 结论 土壤真菌群落的结构(即多样性和物种组成)主要由海拔高度和气候因素决定,这表明真菌群落对环境的依赖性很强,这与之前的类似研究结果一致。我们对山地森林的研究表明,在以前的牧场上建立的新森林对土壤条件和真菌群落没有遗留影响,这与以前在低洼地区的研究结果形成了鲜明对比,在低洼地区,新森林主要建立在以前的耕地上。非均龄森林管理对真菌多样性没有影响,这与之前在均龄高山森林中观察到的结果不同。
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来源期刊
Annals of Forest Science
Annals of Forest Science 农林科学-林学
CiteScore
6.70
自引率
3.30%
发文量
45
审稿时长
12-24 weeks
期刊介绍: Annals of Forest Science is an official publication of the French National Institute for Agriculture, Food and Environment (INRAE) -Up-to-date coverage of current developments and trends in forest research and forestry Topics include ecology and ecophysiology, genetics and improvement, tree physiology, wood quality, and silviculture -Formerly known as Annales des Sciences Forestières -Biology of trees and associated organisms (symbionts, pathogens, pests) -Forest dynamics and ecosystem processes under environmental or management drivers (ecology, genetics) -Risks and disturbances affecting forest ecosystems (biology, ecology, economics) -Forestry wood chain (tree breeding, forest management and productivity, ecosystem services, silviculture and plantation management) -Wood sciences (relationships between wood structure and tree functions, and between forest management or environment and wood properties)
期刊最新文献
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