Fire Effects on Soil Fungi in a Cerrado Vegetation Area According to the Collection Period

Abstract

The Cerrado is recognized for its biodiversity, but is currently considered a threatened biome. This study aimed to evaluate the impacts of low-intensity fire on the abundance and richness of fungal communities in a Red Yellow Latosol in Sensu Stricto Cerrado. Five treatments were defined in control and burned plots, which represent the soil collections as a function of the periods after prescribed firing. The fire effects were evaluated in the 0-5 and 15-20 cm layers of soil depth. For statistical analysis, the Shanon-Wiener, Simpson and Berger-Parker indexes were used. A significant reduction of 33.3% was observed (ANOVA; Dunnett Test p> 0,05) in total abundance (UFC.g-1), in the superficial layer and in the deeper soil profile (15-20 cm) of the burned plots when compared to the control plots. However, it was observed a fungi recolonization at 2 months after burning. A total of 21 fungi genera were found, and more diversity was observed in the burned plots compared to non-burned. The maximum Shanon-Wiener index was H´=0,85 in the 15-20 cm depth for the burned plots. For the dominance index, a maximum value of 70% was observed for the Aspergillus genus (in the treatment before burning for the 15-20 cm depth). The fluctuations in the diversity of fungi after burning were not affected by the fire, but by the rainfall indexes in the treatments after burning. The equity was uniform and showed differences in the numerical richness in burned plots and control. Rainfall has a great impact on the fungal recovery speed.

Changes in landscape ecology between nature reserve and palm oil plantation in West Java, Indonesia based on the observations of macrofungal population

“…Community data, the abundance of each species found and species richness, were standardized by the rarefaction method (based on the smallest sample size) (Johnson and Bhattacharyya 2010). The diversity indices used were Shannon-Wiener index (H'), Gini-Simpson index (1-D), the effective number of species from H', community dominance index used Berger-Parker dominance, and Rényi entropy for relative measures of community diversity and evenness (Tóthmérész 1995;Jost 2006;Maurer and McGill 2010;Leinster and Cobbold 2012;Morris et al 2014;Mbenoun et al 2017;dos Santos et al 2020;Nur 'Aqilah et al 2020). Species accumulation curves were generated by collector and random methods with 1000 permutations (Schön et al 2018;Atrena et al 2020;Kärvemo et al 2021).…”

Efeito do fogo na abundância e diversidade fúngica no solo do Cerrado

“…Em que: A: número de gêneros antes do fogo; B: número de gêneros após o fogo; C: número de gêneros entre os dois tratamentos. SOUSA et al, 2019;SANTOS et al, 2020).…”

“…fogo, tanto para a diversidade Shannon como na de Simpson, sendo possível verificar os resultados na Tabela 3. Sapé (Imperata brasiliensis) e também pela proximidade com a hidrografia local Santos et al (2020),. em seu estudo acerca dos efeitos da queima prescrita a curto prazo nos fungos do solo no bioma Cerrado, observaram que a diversidade nas parcelas queimadas foi maior quando comparada às não queimadas, o que pode ser explicado pelo fato de que alguns fungos antagonistas como Aspergillus e Penicillium são sensíveis ao fogo, favorecendo assim a ocorrência de outros gêneros.…”