Contrasting soil fungal communities in Mediterranean pine forests subjected to different wildfire frequencies

Buscardo, Erika; Rodríguez-Echeverría, Susana; Freitas, Helena; Angelis, Paolo de; Pereira, João Santos; Muller, Ludo A.H.

Artigo

Contrasting soil fungal communities in Mediterranean pine forests subjected to different wildfire frequencies

Mediterranean forest ecosystems are characterized by various vascular plant groups with their associated mycorrhizae and free living soil fungi with various ecological functions. Fire plays a major role in Mediterranean ecosystem dynamics and impacts both above- and below-ground community structure...

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Autor principal:	Buscardo, Erika
Outros Autores:	Rodríguez-Echeverría, Susana, Freitas, Helena, Angelis, Paolo de, Pereira, João Santos, Muller, Ludo A.H.
Grau:	Artigo
Idioma:	English
Publicado em:	Fungal Diversity 2020
Assuntos:	Ascomycota Atheliaceae Basidiomycota Cantharellales Cistus Clavulinaceae Cortinarius Fungi Hebeloma Pinus Pinaster Thelephoraceae Tracheophyta
Acesso em linha:	https://repositorio.inpa.gov.br/handle/1/17767

id	oai:repositorio:1-17767
recordtype	dspace
spelling	oai:repositorio:1-17767 Contrasting soil fungal communities in Mediterranean pine forests subjected to different wildfire frequencies Buscardo, Erika Rodríguez-Echeverría, Susana Freitas, Helena Angelis, Paolo de Pereira, João Santos Muller, Ludo A.H. Ascomycota Atheliaceae Basidiomycota Cantharellales Cistus Clavulinaceae Cortinarius Fungi Hebeloma Pinus Pinaster Thelephoraceae Tracheophyta Mediterranean forest ecosystems are characterized by various vascular plant groups with their associated mycorrhizae and free living soil fungi with various ecological functions. Fire plays a major role in Mediterranean ecosystem dynamics and impacts both above- and below-ground community structure and functioning. However, studies on the effects induced by altered disturbance regimes (associated with recent land use and climate extremes) on fire ecology and especially on its below-ground impacts are few. The objectives of this study were to evaluate the effects of different wildfire regimes on soil fungal community structure using two different molecular methods. We investigated the long-term effects of wildfire on soil fungal communities associated with Pinus pinaster forests in central Portugal, by comparing the results of denaturing gradient gel electrophoresis (DGGE)-based profiling with those obtained with 454 pyrosequencing. Four forest stands with differing fire history and fire return interval, and vegetation cover (mature forest, early successional stage of pine regeneration, and forest converted to scrubland) were sampled 6 years after the last fire event. The pyrosequencing-based approach indicated ca. eight-fold higher numbers of taxa than DGGE. However, fungal community fingerprinting data obtained for the different study stands with DGGE were congruent with those obtained with pyrosequencing. Both short (7.6 years) and long (24 years) fire return intervals (indicated by the presence of ericaceous shrubs in the understorey) induced a decrease in the abundance ratio between basidiomycetes and ascomycetes and appeared to reduce the frequency of ectomycorrhizal fungal species and saprophytes. Wildfire significantly reduced the frequency of late stage successional taxa (e.g. Atheliaceae and Cantharellales) and known or putative saprophytes belonging to the Clavulinaceae and the Archaeorhizomycetaceae. Conversely, early successional fungal species belonging to the Thelephoraceae were favoured by both fire return intervals, while the abundance of Cortinarius and Hebeloma, which include several Cistus-specific species, increased with short wildfire return intervals. This last finding highlights the relationship between post-fire vegetation composition and cover (vegetation successional stage), and fungal symbionts. We hypothesise that these changes could, in the long term, exhaust the resilience of Mediterranean pine forest vegetation and associated soil fungal communities by preventing pine regeneration. © 2014, Mushroom Research Foundation. 2020-06-15T21:49:10Z 2020-06-15T21:49:10Z 2014 Artigo https://repositorio.inpa.gov.br/handle/1/17767 10.1007/s13225-014-0294-5 en Volume 70, Número 1, Pags. 85-99 Restrito Fungal Diversity
institution	Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional
collection	INPA-RI
language	English
topic	Ascomycota Atheliaceae Basidiomycota Cantharellales Cistus Clavulinaceae Cortinarius Fungi Hebeloma Pinus Pinaster Thelephoraceae Tracheophyta
spellingShingle	Ascomycota Atheliaceae Basidiomycota Cantharellales Cistus Clavulinaceae Cortinarius Fungi Hebeloma Pinus Pinaster Thelephoraceae Tracheophyta Buscardo, Erika Contrasting soil fungal communities in Mediterranean pine forests subjected to different wildfire frequencies
topic_facet	Ascomycota Atheliaceae Basidiomycota Cantharellales Cistus Clavulinaceae Cortinarius Fungi Hebeloma Pinus Pinaster Thelephoraceae Tracheophyta
description	Mediterranean forest ecosystems are characterized by various vascular plant groups with their associated mycorrhizae and free living soil fungi with various ecological functions. Fire plays a major role in Mediterranean ecosystem dynamics and impacts both above- and below-ground community structure and functioning. However, studies on the effects induced by altered disturbance regimes (associated with recent land use and climate extremes) on fire ecology and especially on its below-ground impacts are few. The objectives of this study were to evaluate the effects of different wildfire regimes on soil fungal community structure using two different molecular methods. We investigated the long-term effects of wildfire on soil fungal communities associated with Pinus pinaster forests in central Portugal, by comparing the results of denaturing gradient gel electrophoresis (DGGE)-based profiling with those obtained with 454 pyrosequencing. Four forest stands with differing fire history and fire return interval, and vegetation cover (mature forest, early successional stage of pine regeneration, and forest converted to scrubland) were sampled 6 years after the last fire event. The pyrosequencing-based approach indicated ca. eight-fold higher numbers of taxa than DGGE. However, fungal community fingerprinting data obtained for the different study stands with DGGE were congruent with those obtained with pyrosequencing. Both short (7.6 years) and long (24 years) fire return intervals (indicated by the presence of ericaceous shrubs in the understorey) induced a decrease in the abundance ratio between basidiomycetes and ascomycetes and appeared to reduce the frequency of ectomycorrhizal fungal species and saprophytes. Wildfire significantly reduced the frequency of late stage successional taxa (e.g. Atheliaceae and Cantharellales) and known or putative saprophytes belonging to the Clavulinaceae and the Archaeorhizomycetaceae. Conversely, early successional fungal species belonging to the Thelephoraceae were favoured by both fire return intervals, while the abundance of Cortinarius and Hebeloma, which include several Cistus-specific species, increased with short wildfire return intervals. This last finding highlights the relationship between post-fire vegetation composition and cover (vegetation successional stage), and fungal symbionts. We hypothesise that these changes could, in the long term, exhaust the resilience of Mediterranean pine forest vegetation and associated soil fungal communities by preventing pine regeneration. © 2014, Mushroom Research Foundation.
format	Artigo
author	Buscardo, Erika
author2	Rodríguez-Echeverría, Susana Freitas, Helena Angelis, Paolo de Pereira, João Santos Muller, Ludo A.H.
author2Str	Rodríguez-Echeverría, Susana Freitas, Helena Angelis, Paolo de Pereira, João Santos Muller, Ludo A.H.
title	Contrasting soil fungal communities in Mediterranean pine forests subjected to different wildfire frequencies
title_short	Contrasting soil fungal communities in Mediterranean pine forests subjected to different wildfire frequencies
title_full	Contrasting soil fungal communities in Mediterranean pine forests subjected to different wildfire frequencies
title_fullStr	Contrasting soil fungal communities in Mediterranean pine forests subjected to different wildfire frequencies
title_full_unstemmed	Contrasting soil fungal communities in Mediterranean pine forests subjected to different wildfire frequencies
title_sort	contrasting soil fungal communities in mediterranean pine forests subjected to different wildfire frequencies
publisher	Fungal Diversity
publishDate	2020
url	https://repositorio.inpa.gov.br/handle/1/17767
_version_	1787145082184400896
score	11.674684

Contrasting soil fungal communities in Mediterranean pine forests subjected to different wildfire frequencies

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