Environmental degradation impact on native communities of arbuscular mycorrhizal fungi in an urban fragment of semideciduous plateau forest

Carrenho, Rosilaine; Gomes-da-Costa, Sandra Maria

doi:10.1590/s0102-33062011000200013

Cited by 6 publications

(3 citation statements)

References 20 publications

(22 reference statements)

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“…Mycorrhizal colonization rates measured in these areas and plants were comparable to data from others, as reported in Table 2. Human influence in the environment tends to reduce mycorrhizal establishment, colonization and diversity worldwide (Grilli et al, 2014) and specifically in Brazil (Carrenho & Gomes-Da-Costa, 2011). In this study, although intuitively one could think that the removal of approximately nine meters of topsoil in the degraded area could have eliminated potential root colonizers fungi spores from the soil system, plants living in degraded showed a higher AMF colonization than the ones living in more natural, pristine, non-degraded areas.…”

Section: Discussionmentioning

confidence: 66%

Urochloa decumbens Has Higher Mycorrhizal Colonization in Degraded than in Pristine Areas in the Brazilian Cerrado

2019

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Brazil has extensive degraded areas, where vegetation fails to establish due to harsh soil conditions. However, some invasive species such as Urochloa decumbens are successful pioneers in such areas, but the reasons deserve investigation. Mycorrhizal fungi are abundant in Cerrado soils, and their association with plants are beneficial for their establishment in natural and degraded areas. This study investigated whether arbuscular mycorrhizal colonization of native and exotic plants in the Cerrado differs between pristine and degraded areas. We collected 135 plants from four functional groups in 68 areas and determined the percentage of mycorrhizal colonization. The invasive grass Urochloa decumbens had significantly higher colonization rates in degraded than in native areas, and higher colonization than the native species. These results are important for soil management since Urochloa decumbens is widely used in early soil restoration efforts, and for nature conservation concerning the management of invasive plants in restoration areas.

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Section: Discussionmentioning

confidence: 66%

Urochloa decumbens Has Higher Mycorrhizal Colonization in Degraded than in Pristine Areas in the Brazilian Cerrado

2019

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“…It is notable that one subspecies appeared to show highest abundance in the rural and urban areas, whilst the other showed its highest abundance in sites of intermediate urbanity. Interestingly, this species has previously been described as both sensitive (Oehl et al, 2010;Carrenho and Gomes-da-Costa, 2011) and resilient (Sousa et al, 2013) to disturbance. Our observations reaffirm the importance of asking questions about the correct taxonomic resolution for studies such as this (Roy et al, 2019), and provides strong support for van der Heijden et al's (2004) suggestion that inferring traits based on taxonomy alone, particularly at the species level, is problematic.…”

Section: Discussionmentioning

confidence: 86%

Soil microbial communities shift along an urban gradient in Berlin, Germany

Whitehead

Roy²,

Hempel³

et al. 2022

Front. Microbiol.

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The microbial communities inhabiting urban soils determine the functioning of these soils, in regards to their ability to cycle nutrients and support plant communities. In an increasingly urbanized world these properties are of the utmost importance, and the microbial communities responsible are worthy of exploration. We used 53 grassland sites spread across Berlin to describe and explain the impacts of urbanity and other environmental parameters upon the diversity and community composition of four microbial groups. These groups were (i) the Fungi, with a separate dataset for (ii) the Glomeromycota, (iii) the Bacteria, and (iv) the protist phylum Cercozoa. We found that urbanity had distinct impacts on fungal richness, which tended to increase. Geographic distance between sites and soil chemistry, in addition to urbanity, drove microbial community composition, with site connectivity being important for Glomeromycotan communities, potentially due to plant host communities. Our findings suggest that many microbial species are well adapted to urban soils, as supported by an increase in diversity being a far more common result of urbanity than the reverse. However, we also found distinctly separate distributions of operational taxonomic unit (OTU)s from the same species, shedding doubt of the reliability of indicator species, and the use of taxonomy to draw conclusion on functionality. Our observational study employed an extensive set of sites across an urbanity gradient, in the region of the German capital, to produce a rich microbial dataset; as such it can serve as a blueprint for other such investigations.

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“…Of these, five morphospecies (Acaulospora mellea, Glomus tortuosum, Glomus macrocarpum, Glomus clavisporum, Glomus microaggregatum) were common to both areas (Table 2). The Sørensen index (0.58) revealed an intermediate similarity (<61.5%) (Carrenho & Gomes-da-Costa, 2011) between Table 1. Soil physical and chemical properties, total organic carbon (TOC), gravimetric moisture content (W g ), and temperature (T) in the 0-5 cm depth layer in pasture and analog forestry sites in Seropédica, Rio de Janeiro, Brazil.…”

Section: Resultsmentioning

confidence: 92%

Arbuscular mycorrhizal fungal communities and soil organic matter in pasture and analog agroforestry systems

Silva

Camara

Pereira

et al. 2021

Agraria

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Study aimed to (i) assess the impact of analog agroforestry (agrofor) on arbuscular mycorrhizal fungi (AMF), easily extractable glomalin-related soil protein (EE-GRSP), soil organic matter (SOM), and aggregate stability compared with a pasture system and (ii) investigate the chemical, physical and OM properties that explain the differences in soil microbiology between sites. The study was conducted in an agrofor and pasture area. Soil samples were collected in the dry season. A total of 12 AMF taxa were identified. Mean richness was positively correlated with soil pH, Mg 2+ , sum of bases (SB) and moisture. Mean richness and diversity were higher in the analog agroforestry site. Pasture soil had higher EE-GRSP content and spore abundance, variables that were found to be positively correlated with soil temperature, P, K + , and H + Al. EE-GRSP also showed a positive correlation with total organic carbon. Aggregate stability was greater in soil under analog agroforest than pasture. SOM properties did not differ between sites. It is concluded that agrofor changes the evaluated soil physical and microbiological attributes, and the microbiological attributes are influenced by the pH, Mg +2 , K + , SB, P, H+Al, soil moisture and TOC.

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Environmental degradation impact on native communities of arbuscular mycorrhizal fungi in an urban fragment of semideciduous plateau forest

Cited by 6 publications

References 20 publications

Urochloa decumbens Has Higher Mycorrhizal Colonization in Degraded than in Pristine Areas in the Brazilian Cerrado

Urochloa decumbens Has Higher Mycorrhizal Colonization in Degraded than in Pristine Areas in the Brazilian Cerrado

Soil microbial communities shift along an urban gradient in Berlin, Germany

Arbuscular mycorrhizal fungal communities and soil organic matter in pasture and analog agroforestry systems

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