Cargando…

Cortinarius and Tomentella Fungi Become Dominant Taxa in Taiga Soil after Fire Disturbance

Fungi have important ecological functions in the soil of forests, where they decompose organic matter, provide plants with nutrients, increase plant water uptake, and improve plant resistance to adversity, disease, and disturbance. A forest fire presents a serious disturbance of the local ecosystem...

Descripción completa

Detalles Bibliográficos
Autores principales: Cheng, Zhichao, Wu, Song, Pan, Hong, Lu, Xinming, Liu, Yongzhi, Yang, Libin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10672602/
https://www.ncbi.nlm.nih.gov/pubmed/37998918
http://dx.doi.org/10.3390/jof9111113
_version_ 1785149536060047360
author Cheng, Zhichao
Wu, Song
Pan, Hong
Lu, Xinming
Liu, Yongzhi
Yang, Libin
author_facet Cheng, Zhichao
Wu, Song
Pan, Hong
Lu, Xinming
Liu, Yongzhi
Yang, Libin
author_sort Cheng, Zhichao
collection PubMed
description Fungi have important ecological functions in the soil of forests, where they decompose organic matter, provide plants with nutrients, increase plant water uptake, and improve plant resistance to adversity, disease, and disturbance. A forest fire presents a serious disturbance of the local ecosystem and can be considered an important component affecting the function of ecosystem biomes; however, the response of soil fungi to fire disturbance is largely unknown. To investigate the effects of fire disturbance on the community composition and diversity of soil fungi in a taiga forest, we collected soil from plots that had undergone a light, moderate, and heavy fire 10 years previously, with the inclusion of a fire-free control. The present soil fungi were characterized using Illumina MiSeq technology, and the sequences were analyzed to identify differences in the community composition and diversity in response to the changed soil physicochemical properties. The results showed that the Chao1 index, which characterizes the alpha diversity of the fungi, did not change significantly. In contrast, the Shannon index increased significantly (p < 0.05) and the Simpson index decreased significantly (p < 0.05) following a light or heavy fire disturbance compared to the control. The relative abundance of Basidiomycota was significantly higher in the soil of the fire sites than that in the control (p < 0.01), and the relative abundance of Ascomycota was significantly lower (p < 0.01). The results of principal coordinates analyses (PCoAs) showed that fire disturbance highly significantly affected the beta diversity of soil fungi (p < 0.001), while the results of canonical correlation analysis (CCA) indicated that the available nitrogen (AN), moisture content (MC), pH, available potassium (AK), and total nitrogen (TN) contents of the soil significantly affected the compositional structure and diversity of the soil fungal communities. The results of functional prediction showed that the majority of the detected soil fungi were symbiotrophs, followed by saprotrophs and saprotroph–symbiotrophs, with ectomycorrhiza being the dominant functional taxon. Fire disturbance significantly reduced the relative abundance of ectomycorrhiza (p < 0.05). This study illustrates that fire disturbance alters the structural composition, diversity, dominance, and relative abundance of the guilds of soil fungal communities in taiga forest, and strongly affected the beta diversity of soil fungi, with AN, MC, pH, AK, and TN being the most important factors affecting their community structure. The results may provide a useful reference for the restoration and rehabilitation of taiga forests after fire disturbance.
format Online
Article
Text
id pubmed-10672602
institution National Center for Biotechnology Information
language English
publishDate 2023
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-106726022023-11-17 Cortinarius and Tomentella Fungi Become Dominant Taxa in Taiga Soil after Fire Disturbance Cheng, Zhichao Wu, Song Pan, Hong Lu, Xinming Liu, Yongzhi Yang, Libin J Fungi (Basel) Article Fungi have important ecological functions in the soil of forests, where they decompose organic matter, provide plants with nutrients, increase plant water uptake, and improve plant resistance to adversity, disease, and disturbance. A forest fire presents a serious disturbance of the local ecosystem and can be considered an important component affecting the function of ecosystem biomes; however, the response of soil fungi to fire disturbance is largely unknown. To investigate the effects of fire disturbance on the community composition and diversity of soil fungi in a taiga forest, we collected soil from plots that had undergone a light, moderate, and heavy fire 10 years previously, with the inclusion of a fire-free control. The present soil fungi were characterized using Illumina MiSeq technology, and the sequences were analyzed to identify differences in the community composition and diversity in response to the changed soil physicochemical properties. The results showed that the Chao1 index, which characterizes the alpha diversity of the fungi, did not change significantly. In contrast, the Shannon index increased significantly (p < 0.05) and the Simpson index decreased significantly (p < 0.05) following a light or heavy fire disturbance compared to the control. The relative abundance of Basidiomycota was significantly higher in the soil of the fire sites than that in the control (p < 0.01), and the relative abundance of Ascomycota was significantly lower (p < 0.01). The results of principal coordinates analyses (PCoAs) showed that fire disturbance highly significantly affected the beta diversity of soil fungi (p < 0.001), while the results of canonical correlation analysis (CCA) indicated that the available nitrogen (AN), moisture content (MC), pH, available potassium (AK), and total nitrogen (TN) contents of the soil significantly affected the compositional structure and diversity of the soil fungal communities. The results of functional prediction showed that the majority of the detected soil fungi were symbiotrophs, followed by saprotrophs and saprotroph–symbiotrophs, with ectomycorrhiza being the dominant functional taxon. Fire disturbance significantly reduced the relative abundance of ectomycorrhiza (p < 0.05). This study illustrates that fire disturbance alters the structural composition, diversity, dominance, and relative abundance of the guilds of soil fungal communities in taiga forest, and strongly affected the beta diversity of soil fungi, with AN, MC, pH, AK, and TN being the most important factors affecting their community structure. The results may provide a useful reference for the restoration and rehabilitation of taiga forests after fire disturbance. MDPI 2023-11-17 /pmc/articles/PMC10672602/ /pubmed/37998918 http://dx.doi.org/10.3390/jof9111113 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Cheng, Zhichao
Wu, Song
Pan, Hong
Lu, Xinming
Liu, Yongzhi
Yang, Libin
Cortinarius and Tomentella Fungi Become Dominant Taxa in Taiga Soil after Fire Disturbance
title Cortinarius and Tomentella Fungi Become Dominant Taxa in Taiga Soil after Fire Disturbance
title_full Cortinarius and Tomentella Fungi Become Dominant Taxa in Taiga Soil after Fire Disturbance
title_fullStr Cortinarius and Tomentella Fungi Become Dominant Taxa in Taiga Soil after Fire Disturbance
title_full_unstemmed Cortinarius and Tomentella Fungi Become Dominant Taxa in Taiga Soil after Fire Disturbance
title_short Cortinarius and Tomentella Fungi Become Dominant Taxa in Taiga Soil after Fire Disturbance
title_sort cortinarius and tomentella fungi become dominant taxa in taiga soil after fire disturbance
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10672602/
https://www.ncbi.nlm.nih.gov/pubmed/37998918
http://dx.doi.org/10.3390/jof9111113
work_keys_str_mv AT chengzhichao cortinariusandtomentellafungibecomedominanttaxaintaigasoilafterfiredisturbance
AT wusong cortinariusandtomentellafungibecomedominanttaxaintaigasoilafterfiredisturbance
AT panhong cortinariusandtomentellafungibecomedominanttaxaintaigasoilafterfiredisturbance
AT luxinming cortinariusandtomentellafungibecomedominanttaxaintaigasoilafterfiredisturbance
AT liuyongzhi cortinariusandtomentellafungibecomedominanttaxaintaigasoilafterfiredisturbance
AT yanglibin cortinariusandtomentellafungibecomedominanttaxaintaigasoilafterfiredisturbance