Sustainable Forest Management Research Institute, University of Valladolid, Avda. Madrid 44, 34071 Palencia, Spain.
Sustainable Forest Management Research Institute, University of Valladolid, Avda. Madrid 44, 34071 Palencia, Spain; Ethiopian Environment and Forest Research Institute (EEFRI), P. O. Box 30708 Code 1000, Addis Ababa, Ethiopia.
Sci Total Environ. 2023 Jun 1;875:162676. doi: 10.1016/j.scitotenv.2023.162676. Epub 2023 Mar 8.
Cistus scrublands are pyrophytic ecosystems and occur widely across Mediterranean regions. Management of these scrublands is critical to prevent major disturbances, such as recurring wildfires. This is because management appears to compromise the synergies necessary for forest health and the provision of ecosystem services. Furthermore, it supports high microbial diversity, opening questions of how forest management practices impact belowground associated diversity as research related to this issue is scarce. This study aims to investigate the effects of different fire prevention treatments and site history on bacterial and fungi co-response and co-occurrence patterns over a fire-risky scrubland ecosystem. Two different site histories were studied by applying three different fire prevention treatments and samples were analyzed by amplification and sequencing of ITS2 and 16S rDNA for fungi and bacteria, respectively. The data revealed that site history, especially regarding fire occurrence, strongly influenced the microbial community. Young burnt areas tended to have a more homogeneous and lower microbial diversity, suggesting environmental filtering to a heat-resistant community. In comparison, young clearing history also showed a significant impact on the fungal community but not on the bacteria. Some bacteria genera were efficient predictors of fungal diversity and richness. For instance, Ktedonobacter and Desertibacter were a predictor of the presence of the edible mycorrhizal bolete Boletus edulis. These results demonstrate fungal and bacterial community co-response to fire prevention treatments and provide new tools for forecasting forest management impacts on microbial communities.
石南灌丛是自热源生态系统，广泛分布于地中海地区。这些灌丛的管理对于防止重大干扰（如野火频发）至关重要。这是因为管理似乎破坏了森林健康和生态系统服务提供所必需的协同作用。此外，它支持高度的微生物多样性，这引发了一个问题，即森林管理实践如何影响地下相关多样性，因为与这个问题相关的研究很少。本研究旨在调查不同防火处理和地点历史对火灾风险灌丛生态系统中细菌和真菌协同响应和共存模式的影响。通过应用三种不同的防火处理，研究了两种不同的地点历史，并通过扩增和 ITS2 和 16S rDNA 测序分别对真菌和细菌进行了分析。数据表明，地点历史，特别是火灾发生情况，强烈影响了微生物群落。年轻的燃烧区往往具有更均匀和更低的微生物多样性，表明对耐热群落的环境过滤。相比之下，年轻的清理历史也对真菌群落产生了显著影响，但对细菌群落没有影响。一些细菌属是真菌多样性和丰富度的有效预测因子。例如，Ktedonobacter 和 Desertibacter 是可食用的外生菌根菌 Boletus edulis 存在的预测因子。这些结果表明真菌和细菌群落对防火处理的协同响应，并为预测森林管理对微生物群落的影响提供了新的工具。
