Abstract
Heterobasidion root rot is one of the most economically important conifer diseases in the Northern Hemisphere, and stump removal is considered to be one of most effective control methods. However, the impact of stump removal on the diversity of mycorrhizal and soil fungi should be evaluated. From 2011 to 2012, a stump removal trial was established in six different sample plots in two regions of Latvia. The stump removal sites and control sites were replanted with spruce seedlings in 2012. Seven years later, soil samples were collected in the stump removal and control sample plots to compare the diversity of mycorrhizal and soil fungi. Fungal communities were analyzed using next-generation sequencing methods. Our results showed that there are no significant differences in mycorrhizal and soil fungal communities between the stump removal area and the clear-felled control area seven years later. The mycorrhizal fungi were the most commonly sequenced fungal ecological group, and their diversity was similar to clear-felled control sites. However, there were some differences in the fungal species composition.
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