Shifts in root and soil chemistry drive the assembly of belowground fungal communities in tropical land-use systems

Ballauff, Johannes; Schneider, Dominik; Edy, Nur; Irawan, Bambang; Daniel, Rolf; Polle, Andrea

doi:10.1016/j.soilbio.2021.108140

Cited by 29 publications

(16 citation statements)

References 111 publications

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“…We found that the conversion of the native forests to the acacia plantations had little effect on fungal alpha diversity in surface and subsurface roots and soil (Table 3), while it largely affected fungal community structures (Table 2), in agreement with previous studies in tropical land-use systems (Kerfahi et al, 2016;Brinkmann et al, 2019;Ballauff et al, 2021).…”

Section: Effects Of Vegetation and Soil Types On Alpha Diversitysupporting

confidence: 90%

“…We found that vegetation, but not soil types, strongly influenced root-associated bacterial and fungal community structures in the surface based on the PERMANOVA analyses in our study sites (Table 2), although there were several reports that soil types affected root-associated microbial communities (Bonito et al, 2014;Ballauff et al, 2021). Therefore, tree roots appeared to mainly control root-associated microbial communities regardless of soil types in this region (Table 2), supporting our first hypothesis in surface.…”

Section: Effects Of Vegetation On Microbial Community Structuressupporting

confidence: 81%

“…Tree species compositions in forest vegetation can also affect the belowground microbial communities ( Prescott and Grayston, 2013 ; Liu et al, 2018 ), in particular, root-associated communities because specific tree roots are typically associated with specific groups of microbes, although soil properties often have influence on root-associated communities ( Bonito et al, 2014 ; Goldmann et al, 2016 ; Ballauff et al, 2021 ). The roots of most trees are associated with either arbuscular mycorrhizal fungi or ectomycorrhizal (ECM) fungi ( Smith and Read, 2010 ).…”

Section: Introductionmentioning

confidence: 99%

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Comparison of the Structure and Diversity of Root-Associated and Soil Microbial Communities Between Acacia Plantations and Native Tropical Mountain Forests

et al. 2021

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Deforestation of native tropical forests has occurred extensively over several decades. The plantation of fast-growing trees, such as Acacia spp., is expanding rapidly in tropical regions, which can contribute to conserve the remaining native tropical forests. To better understand belowground biogeochemical cycles and the sustainable productivity of acacia plantations, we assessed the effects of vegetation (acacia plantations vs. native forests) and soil types (Oxisols vs. Ultisols) on soil properties, including the diversity and community structures of bacteria- and fungi-colonizing surface and subsurface roots and soil in the Central Highlands of Vietnam. The results in surface soil showed that pH was significantly higher in acacia than in native for Oxisols but not for Ultisols, while exchangeable Al was significantly lower in acacia than in native for Ultisols but not for Oxisols. Bacterial alpha diversity (especially within phylum Chloroflexi) was higher in acacia than in native only for Oxisols but not for Ultisols, which was the same statistical result as soil pH but not exchangeable Al. These results suggest that soil pH, but not exchangeable Al, can be the critical factor to determine bacterial diversity. Acacia tree roots supported greater proportions of copiotrophic bacteria, which may support lower contents of soil inorganic N, compared with native tree roots for both Oxisols and Ultisols. Acacia tree roots also supported greater proportions of plant pathogenic Mycoleptodiscus sp. but appeared to reduce the abundances and diversity of beneficial ECM fungi compared with native tree roots regardless of soil types. Such changes in fungal community structures may threaten the sustainable productivity of acacia plantations in the future.

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Section: Effects Of Vegetation and Soil Types On Alpha Diversitysupporting

confidence: 90%

Section: Effects Of Vegetation On Microbial Community Structuressupporting

confidence: 81%

Section: Introductionmentioning

confidence: 99%

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Comparison of the Structure and Diversity of Root-Associated and Soil Microbial Communities Between Acacia Plantations and Native Tropical Mountain Forests

et al. 2021

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“…This result was expected (hypothesis ii) since mycorrhizal fungi colonizing roots are directly influenced by roots of their host. Host effects are known from studies showing strong impact of vegetation [12,14,37], tree identity [70,[83][84][85] and root chemistry [20,86]. Host effects may stabilize mycorrhizal patterns at larger geographic scales [17].…”

Section: Stratification Of Root-associated Fungi By Organic Layer and Mineral Topsoilmentioning

confidence: 99%

Soil Layers Matter: Vertical Stratification of Root-Associated Fungal Assemblages in Temperate Forests Reveals Differences in Habitat Colonization

et al. 2021

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Ectomycorrhizal and saprotrophic fungi play pivotal roles in ecosystem functioning. Here, we studied the vertical differentiation of root-associated fungi (RAF) in temperate forests. We analysed RAF assemblages in the organic and mineral soil from 150 experimental forest plots across three biogeographic regions spanning a distance of about 800 km. Saprotrophic RAF showed the highest richness in organic and symbiotrophic RAF in mineral soil. Symbiotrophic RAF exhibited higher relative abundances than saprotrophic fungi in both soil layers. Beta-diversity of RAF was mainly due to turnover between organic and mineral soil and showed regional differences for symbiotrophic and saprotrophic fungi. Regional differences were also found for different phylogenetic levels, i.e., fungal orders and indicator species in the organic and mineral soil, supporting that habitat conditions strongly influence differentiation of RAF assemblages. Important exceptions were fungal orders that occurred irrespective of the habitat conditions in distinct soil layers across the biogeographic gradient: Russulales and Cantharellales (ectomycorrhizal fungi) were enriched in RAF assemblages in mineral soil, whereas saprotrophic Polyporales and Sordariales and ectomycorrhizal Boletales were enriched in RAF assemblages in the organic layer. These results underpin a phylogenetic signature for niche partitioning at the rank of fungal orders and suggest that RAF assembly entails two strategies encompassing flexible and territorial habitat colonization by different fungal taxa.

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“…Changes in soil resources impact saprotrophic and symbiotrophic fungal guilds (Lindahl et al, 2007). Recent studies suggest that the phylogenetic composition of both guilds is responding to different ecological factors, leading to divergent communities in response to environmental changes (Schröter et al 2019;Nguyen et al 2020;Ballauff et al, 2021). Therefore, we anticipated that the introduction of Douglas-fir into European forests has profound effects on the functional and taxonomic composition of soil fungal communities.…”

Section: Introductionmentioning

confidence: 99%

Forest tree species composition and abiotic site conditions drive soil fungal communities and functional groups

Likulunga

eacuterez

Schneider

et al. 2021

Preprint

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Soil fungi, especially the functional guilds of saprotrophic and mycorrhizal fungi, play a central role in ecosystem processes by degrading litter, mining for mineral nutrients and linking above- and belowground nutrient fluxes. Fungal community structures are influenced by abiotic habitat filters and management decisions such as tree species selection. Yet, the implications of the enrichment of temperate forests consisting of tree species in their natural range with non-native tree species on soil fungal diversity and their functional groups are unknown. Here, we studied fungal communities in 40 plots located in two regions differing in site conditions (nutrient content and soil moisture) in forests composed of European beech, Norway spruce and Douglas-fir (non-native) and mixtures of beech with either spruce or Douglas-fir. We hypothesized that fungal community structures are driven by soil resources and tree species composition, generally resulting in higher fungal diversity in mixed than in mono-specific forests. We further hypothesized that Douglas-fir has a negative effect on ectomycorrhizal fungal species richness compared to native species, whereas saprotrophic fungal richness is unaffected. We found strong separation of fungal communities between nutrient-rich and nutrient-poor sites and taxonomic divergence between beech and conifer fungal communities and an intermediate pattern in mixed forests. Mycorrhizal species richness did not vary with forest type, but the relative abundance of mycorrhizal species was lower in Douglas-fir and in mixed beech-Douglas-fir forests than in spruce or beech-spruce mixture. Conifer forests contained higher relative abundances of saprotrophic fungi than mono-specific beech forests. Among 16 abundant fungal orders in soil, two containing saprotrophic fungi (Tremellales, Hymenochaetales) were enriched in conifer forests, regardless of site conditions and tree species mixture. The other fungal orders, including those dominated by mycorrhizal fungi (Russulales, Boletales, Atheliales, Cantharellales) showed variable patterns depending on site conditions and tree species. In conclusion, Douglas-fir mono-specific or mixed forests show no loss of fungal species richness, but a shift in functional composition towards saprotrophic fungi.

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Shifts in root and soil chemistry drive the assembly of belowground fungal communities in tropical land-use systems

Cited by 29 publications

References 111 publications

Comparison of the Structure and Diversity of Root-Associated and Soil Microbial Communities Between Acacia Plantations and Native Tropical Mountain Forests

Comparison of the Structure and Diversity of Root-Associated and Soil Microbial Communities Between Acacia Plantations and Native Tropical Mountain Forests

Soil Layers Matter: Vertical Stratification of Root-Associated Fungal Assemblages in Temperate Forests Reveals Differences in Habitat Colonization

Forest tree species composition and abiotic site conditions drive soil fungal communities and functional groups

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