Short‐term impact of fire on the total soil microbial and nitrifier communities in a wet savanna
Abstract Savannas are characterized by the coexistence of grasses and trees. Fires are critical for their coexistence, because they decrease the survival of tree seedlings and saplings and their recruitment to the adult stage. In some humid savannas, perennial grasses inhibit nitrification and trees...
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doaj-d526109de8e94b69b422bd0b6da047932021-08-02T18:48:03ZengWileyEcology and Evolution2045-77582021-08-0111159958996910.1002/ece3.7661Short‐term impact of fire on the total soil microbial and nitrifier communities in a wet savannaTharaniya Srikanthasamy0Sébastien Barot1Fulgence K. Koffi2Kevin Tambosco3Yoan Marcangeli4David Carmignac5Aya Brigitte N'Dri6Jonathan Gervaix7Xavier Le Roux8Jean‐Christophe Lata9Sorbonne Université, Université de Paris UPEC CNRS INRAE IRD UMR 7618 Institute of Ecology and Environmental Sciences – Paris, iEES ParisParis FranceIRD Sorbonne Université CNRS INRAE Université de Paris UPEC UMR 7618 Institute of Ecology and Environmental Sciences – Paris, iEES‐ParisParis FranceUFR‐SN / Research Station of Lamto (CRE) Research Pole Environment and Sustainable Development, Nangui Abrogoua University (ex University of Abobo‐Adjamé), Abidjan, Côte d'IvoireAbidjan Ivory CoastSorbonne Université, Université de Paris UPEC CNRS INRAE IRD UMR 7618 Institute of Ecology and Environmental Sciences – Paris, iEES ParisParis FranceSorbonne Université, Université de Paris UPEC CNRS INRAE IRD UMR 7618 Institute of Ecology and Environmental Sciences – Paris, iEES ParisParis FranceSorbonne Université, Université de Paris UPEC CNRS INRAE IRD UMR 7618 Institute of Ecology and Environmental Sciences – Paris, iEES ParisParis FranceUFR‐SN / Research Station of Lamto (CRE) Research Pole Environment and Sustainable Development, Nangui Abrogoua University (ex University of Abobo‐Adjamé), Abidjan, Côte d'IvoireAbidjan Ivory CoastINRA CNRS Université de Lyon Université Lyon 1 Laboratoire d'Ecologie Microbienne UMR INRA 1418 UMR CNRS 5557Villeurbanne FranceINRA CNRS Université de Lyon Université Lyon 1 Laboratoire d'Ecologie Microbienne UMR INRA 1418 UMR CNRS 5557Villeurbanne FranceSorbonne Université, Université de Paris UPEC CNRS INRAE IRD UMR 7618 Institute of Ecology and Environmental Sciences – Paris, iEES ParisParis FranceAbstract Savannas are characterized by the coexistence of grasses and trees. Fires are critical for their coexistence, because they decrease the survival of tree seedlings and saplings and their recruitment to the adult stage. In some humid savannas, perennial grasses inhibit nitrification and trees stimulate nitrification, which likely favors coexistence between trees and grasses. However, fires may influence plant capacity to control nitrogen cycling, which could subsequently influence tree–grass coexistence and savanna nitrogen budget. Therefore, we sampled soil in a humid savanna of Ivory Coast under the dominant nitrification‐inhibiting grass species and the dominant nitrification‐stimulating tree species and under bare soil before and after (i.e., 5 days) fire during the long dry season. We quantified the total microbial and nitrifier abundances and transcriptional activities and the nitrification enzyme activity. Fire decreased soil water content, probably by increasing evaporation and, maybe, by triggering the growth of grasses, and increased soil ammonium availability likely due to ash deposition and increased mineralization. Fire did not impact the total archaeal, bacterial, or fungal abundances, or that of the nitrifiers. Fire did not impact archaeal transcriptional activity and increased bacterial and fungal total transcriptional activities. In contrast, fire decreased the archaeal nitrifier transcriptional activities and the nitrification enzymatic activity, likely due to the often reported resumption of the growth of nitrification‐inhibiting grasses quickly after the fire (and the subsequent increase in root exudation). These results pave the way for a better understanding of the short‐term effects of fire on nitrogen cycling and tree–grass competition for nitrogen.https://doi.org/10.1002/ece3.7661AOAAOBBiological Nitrification Inhibition (BNI)burningnitrificationperennial grasses |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Tharaniya Srikanthasamy Sébastien Barot Fulgence K. Koffi Kevin Tambosco Yoan Marcangeli David Carmignac Aya Brigitte N'Dri Jonathan Gervaix Xavier Le Roux Jean‐Christophe Lata |
spellingShingle |
Tharaniya Srikanthasamy Sébastien Barot Fulgence K. Koffi Kevin Tambosco Yoan Marcangeli David Carmignac Aya Brigitte N'Dri Jonathan Gervaix Xavier Le Roux Jean‐Christophe Lata Short‐term impact of fire on the total soil microbial and nitrifier communities in a wet savanna Ecology and Evolution AOA AOB Biological Nitrification Inhibition (BNI) burning nitrification perennial grasses |
author_facet |
Tharaniya Srikanthasamy Sébastien Barot Fulgence K. Koffi Kevin Tambosco Yoan Marcangeli David Carmignac Aya Brigitte N'Dri Jonathan Gervaix Xavier Le Roux Jean‐Christophe Lata |
author_sort |
Tharaniya Srikanthasamy |
title |
Short‐term impact of fire on the total soil microbial and nitrifier communities in a wet savanna |
title_short |
Short‐term impact of fire on the total soil microbial and nitrifier communities in a wet savanna |
title_full |
Short‐term impact of fire on the total soil microbial and nitrifier communities in a wet savanna |
title_fullStr |
Short‐term impact of fire on the total soil microbial and nitrifier communities in a wet savanna |
title_full_unstemmed |
Short‐term impact of fire on the total soil microbial and nitrifier communities in a wet savanna |
title_sort |
short‐term impact of fire on the total soil microbial and nitrifier communities in a wet savanna |
publisher |
Wiley |
series |
Ecology and Evolution |
issn |
2045-7758 |
publishDate |
2021-08-01 |
description |
Abstract Savannas are characterized by the coexistence of grasses and trees. Fires are critical for their coexistence, because they decrease the survival of tree seedlings and saplings and their recruitment to the adult stage. In some humid savannas, perennial grasses inhibit nitrification and trees stimulate nitrification, which likely favors coexistence between trees and grasses. However, fires may influence plant capacity to control nitrogen cycling, which could subsequently influence tree–grass coexistence and savanna nitrogen budget. Therefore, we sampled soil in a humid savanna of Ivory Coast under the dominant nitrification‐inhibiting grass species and the dominant nitrification‐stimulating tree species and under bare soil before and after (i.e., 5 days) fire during the long dry season. We quantified the total microbial and nitrifier abundances and transcriptional activities and the nitrification enzyme activity. Fire decreased soil water content, probably by increasing evaporation and, maybe, by triggering the growth of grasses, and increased soil ammonium availability likely due to ash deposition and increased mineralization. Fire did not impact the total archaeal, bacterial, or fungal abundances, or that of the nitrifiers. Fire did not impact archaeal transcriptional activity and increased bacterial and fungal total transcriptional activities. In contrast, fire decreased the archaeal nitrifier transcriptional activities and the nitrification enzymatic activity, likely due to the often reported resumption of the growth of nitrification‐inhibiting grasses quickly after the fire (and the subsequent increase in root exudation). These results pave the way for a better understanding of the short‐term effects of fire on nitrogen cycling and tree–grass competition for nitrogen. |
topic |
AOA AOB Biological Nitrification Inhibition (BNI) burning nitrification perennial grasses |
url |
https://doi.org/10.1002/ece3.7661 |
work_keys_str_mv |
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