Contrasting effects of grasses and trees on microbial N-cycling in an African humid savanna

Srikanthasamy, Tharaniya; Leloup, Julie; N’Dri, Aya Brigitte; Barot, Sébastien; Gervaix, Jonathan; Koné, Armand W.; Koffi, Kouamé Fulgence; Roux, Xavier Le; Raynaud, Xavier; Lata, Jean‐Christophe

doi:10.1016/j.soilbio.2017.11.016

Cited by 41 publications

(39 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Evidence that some tree species can inhibit Nitrobacter Soils with low pH and low N availability, typical for most forest Hu et al, 2015), heathland (Bardon et al, 2018) and humid savanna ecosystems (Le Roux et al, 1995), harbour selected plants with diverse mechanisms for improving soil N availability (Chapman et al, 2006). In particular, it has been shown that some plant species in these ecosystems can inhibit nitrifiers (Lata et al, 2004;Subbarao et al, 2009;Srikanthasamy et al, 2018) and that this inhibition is due to the production of specific compounds, often by roots (Subbarao et al, 2006(Subbarao et al, , 2015Coskun et al, 2017). However, most plants previously identified as having a biological nitrification inhibition (BNI) capacity were grass species.…”

Section: Discussionmentioning

confidence: 99%

“…Although BNI has been already observed in different ecosystems (Subbarao et al ., ; Srikanthasamy et al ., ), the underlying mechanisms have been identified only for a few perennial grass species, e.g. Brachiaria spp ., Andropogon spp ., and Hyparrhenia diplandra (Lata et al ., , ; Subbarao et al ., ), as well as cultivated sorghum (Subbarao et al ., ) and rice (Sun et al ., ).…”

Section: Introductionmentioning

confidence: 99%

“…These mechanisms are of high importance mainly in ecosystems with low soil N availability as they minimize N losses and allow plants to effectively utilize the scarce N resource (Vitousek and Sanford, 2003;Boudsocq et al, 2009). Although BNI has been already observed in different ecosystems (Subbarao et al, 2006;Srikanthasamy et al, 2018), the underlying mechanisms have been identified only for a few perennial grass species, e.g. Brachiaria spp., Andropogon spp., and Hyparrhenia diplandra (Lata et al, 1999(Lata et al, , 2004Subbarao et al, 2009), as well as cultivated sorghum (Subbarao et al, 2012) and rice (Sun et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Biological inhibition of soil nitrification by forest tree species affects Nitrobacter populations

Laffite

Florio

Andrianarisoa

et al. 2020

Environmental Microbiology

Self Cite

View full text Add to dashboard Cite

Summary Some temperate tree species are associated with very low soil nitrification rates, with important implications for forest N dynamics, presumably due to their potential for biological nitrification inhibition (BNI). However, evidence for BNI in forest ecosystems is scarce so far and the nitrifier groups controlled by BNI‐tree species have not been identified. Here, we evaluated how some tree species can control soil nitrification by providing direct evidence of BNI and identifying the nitrifier group(s) affected. First, by comparing 28 year‐old monocultures of several tree species, we showed that nitrification rates correlated strongly with the abundance of the nitrite oxidizers Nitrobacter (50‐ to 1000‐fold changes between tree monocultures) and only weakly with the abundance of ammonia oxidizing archaea (AOA). Second, using reciprocal transplantation of soil cores between low and high nitrification stands, we demonstrated that nitrification changed 16 months after transplantation and was correlated with changes in the abundance of Nitrobacter, not AOA. Third, extracts of litter or soil collected from the low nitrification stands of Picea abies and Abies nordmanniana inhibited the growth of Nitrobacter hamburgensis X14. Our results provide for the first time direct evidence of BNI by tree species directly affecting the abundance of Nitrobacter.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Biological inhibition of soil nitrification by forest tree species affects Nitrobacter populations

Laffite

Florio

Andrianarisoa

et al. 2020

Environmental Microbiology

Self Cite

View full text Add to dashboard Cite

show abstract

“…, Srikanthasamy et al. ). These strategies to control N cycling processes greatly contribute to plant survival or capacity to colonize adverse environments, particularly in ecosystems with low soil N availability (Ishikawa et al.…”

Section: Introductionmentioning

confidence: 99%

“…Microorganisms are often considered as better competitors than plant roots for this resource (Hodge et al 2000, Kuzyakov andXu 2013). However, during the last twenty years, it has been increasingly reported that plants can modify soil NO 3 À and NH 4 + availability by modulating nitrification and denitrification (Patra et al 2006, Le Roux et al 2013, sometimes through the release of specific compounds by roots (Subbarao et al 2009, DeLuca et al 2013, Dietz et al 2013, Bardon et al 2014, Srikanthasamy et al 2018. These strategies to control N cycling processes greatly contribute to plant survival or capacity to colonize adverse environments, particularly in ecosystems with low soil N availability (Ishikawa et al 2003, Bardon et al 2014.…”

Section: Introductionmentioning

confidence: 99%

Control of soil N cycle processes by Pteridium aquilinum and Erica cinerea in heathlands along a pH gradient

et al. 2018

Self Cite

View full text Add to dashboard Cite

Nitrate is a limiting resource in heathland acid soils. Nitrate levels increase in heathland soils after Pteridium aquilinum invasions, and this species is assumed to biologically control nitrogen cycle processes, thus increasing nitrate availability. We compared how P. aquilinum (bracken) and Erica cinerea (bell heather) modify processes driving nitrate availability along a soil pH gradient in a Natura 2000 reserve facing bracken invasion. Soil nitrate and ammonium concentrations, substrate‐induced respiration (SIR), denitrification and nitrification enzyme activities (DEA and NEA, respectively), root procyanidin concentrations, and denitrification inhibition by procyanidins were measured on five sites under P. aquilinum and E. cinerea stands. NEA and nitrate levels were higher, and ammonium levels and SIR lower, for P. aquilinum in the most acid soils. Procyanidins from both species induced the same level of denitrification inhibition, soil nitrate being correlated with root procyanidin concentration for both species. Soil nitrate correlated with NEA only for P. aquilinum. Our results show that both species increased procyanidin production in the most acid soils, thereby reducing denitrification and decreasing nitrate loss, this process being more efficient for E. cinerea. However, P. aquilinum additionally increased nitrification, and this double control on nitrification and denitrification was very efficient to increase soil nitrate availability in the most acid soils. This may participate to the success of P. aquilinum invasions in heathlands. This shows that approaches for bracken control in heathlands should better account for belowground processes and, more generally, that biological denitrification inhibition by plants may be a widespread phenomenon influencing soil N dynamics in N‐poor environments.

show abstract

Short‐term impact of fire on the total soil microbial and nitrifier communities in a wet savanna

Srikanthasamy

Koffi

Tambosco

et al. 2021

Ecology and Evolution

Self Cite

View full text Add to dashboard Cite

show abstract

Contrasting effects of grasses and trees on microbial N-cycling in an African humid savanna

Cited by 41 publications

References 54 publications

Biological inhibition of soil nitrification by forest tree species affects Nitrobacter populations

Biological inhibition of soil nitrification by forest tree species affects Nitrobacter populations

Control of soil N cycle processes by Pteridium aquilinum and Erica cinerea in heathlands along a pH gradient

Short‐term impact of fire on the total soil microbial and nitrifier communities in a wet savanna

Contact Info

Product

Resources

About