Global arbuscular mycorrhizal fungal diversity and abundance decreases with soil available phosphorus

Abstract

Aim Arbuscular mycorrhizal fungi (AMF) are widely distributed soil organisms that play critical roles in ecosystem functions. However, little is known about their global distribution and the underlying mechanisms. Here, we aimed to explore distribution pattern and key predictors of AMF diversity and abundance at the global scale. Location Global. Time Period 1987–2022. Major Taxa Studied Arbuscular mycorrhizal fungi. Methods We investigated the distribution pattern and key predictors of AMF diversity and abundance at the global scale by compiling 654 field studies. Results We found that cold climate zones had relatively low AMF diversity. At the ecosystem level, grassland tended to have higher AMF diversity and abundance. Soil available phosphorus (P) and latitude were the most important predictors of AMF diversity. AMF richness and Shannon index decreased with increasing soil available P and latitude. Soil available P and soil pH were the main predictors for global distribution of AMF abundance. AMF colonization rate and spore abundance declined with soil available P and increased with soil pH. Mean annual precipitation was also an important, positive correlate of spore abundance. Main Conclusions Our findings highlight soil available P as an important predictor affecting the distribution of AMF diversity and abundance, advancing our understanding of the mechanisms underlying the distribution patterns of mycorrhizal fungal diversity and abundance at the global scale.

Arbuscular Mycorrhizal Fungus Alleviates Charged Nanoplastic Stress in Host Plants via Enhanced Defense-Related Gene Expressions and Hyphal Capture

“…The AM fungal colonization rates in the inoculated plants ranged from 52 to 66% (Figure S5), suggesting successful fungal colonization according to a previous study summarizing global data . Limited colonization rates were detected in the uninoculated plants (Figure S5).…”

Arbuscular Mycorrhizal Fungi (AMF) diversity and population in UPV Nature Trail, Miagao, Iloilo, Philippines

“…Surprisingly, however, a one-way ANOVA of the mean diversity indices reveals no significant difference in the diversity of AMF among the different points with different vegetation. Previous reports by Davison et al (2015), Xu et al (2017), andMa et al (2023) even showed that grasslands tend to have a higher AMF abundance and diversity, in contrast with the results of this study. According to Solís-Rodríguez et al (2020), aside from vegetation, abiotic factors, such as the chemical properties of the soil at the time the samples were collected, also have a significant role in structuring AMF communities.…”

“…This finding corroborates the presumed positive correlation between AMF and plant diversity (Hiiesalu et al 2014;Xu et al 2016). The plant diversity hypothesis suggests that as the diversity of plants in an ecosystem increases, more soil microbial niches emerge, which increases the likelihood for soil microorganisms, such as AMF, to find a viable plant host (Ma et al 2023). Similarly, the greater the diversity of AMF abundance and diversity, the more improved the ability of plants to absorb nutrients.…”

The Diversity of Arbuscular Mycorrhizal Fungi and Their Associations in South America: A Case Study of Argentinean and Brazilian Cattle Raising Productive Ecosystems: A Review

“…Traditionally, it is believed that forests are more diverse than grasslands; nevertheless, new findings showed that grasslands present high microbial diversity. Among these microbial communities, AMF diversity is higher in grasslands globally [140]. In general, AMF diversity was not significantly different between South American grasslands and pastures.…”

“…Thus, a new gap comes out in the information on the diversity of AMF at the level of ecosystem functioning that needs to be explored and investigated to contribute to the knowledge of these fungi and their interactions with their hosts in grasslands and pastures. It is important to highlight that the grassy ecosystems in general are named "grasslands" in sensu lato [140], without discriminating between pastures (grazed ecosystems with anthropogenic intervention, e.g., sowing of exotic species, thinning of shrubs, etc.) or grasslands sensu stricto (natural grasslands) as they were defined in this work.…”