Short‐term impact of fire on the total soil microbial and nitrifier communities in a wet savanna
Autor: | Fulgence K. Koffi, David Carmignac, Sébastien Barot, Aya Brigitte N’Dri, Jonathan Gervaix, Jean-Christophe Lata, Xavier Le Roux, Yoan Marcangeli, Tharaniya Srikanthasamy, Kevin Tambosco |
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Přispěvatelé: | Institut d'écologie et des sciences de l'environnement de Paris (iEES Paris ), Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Station d'écologie de Lamto, Université Abobo-Adjamé-Centre de Recherche en Ecologie, Laboratoire d'Ecologie Microbienne - UMR 5557 (LEM), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Ecole Nationale Vétérinaire de Lyon (ENVL)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) |
Rok vydání: | 2021 |
Předmět: |
0106 biological sciences
Biological Nitrification Inhibition (BNI) Perennial plant media_common.quotation_subject perennial grasses 010603 evolutionary biology 01 natural sciences AOA Competition (biology) AOB chemistry.chemical_compound Dry season otorhinolaryngologic diseases Ammonium Nitrogen cycle QH540-549.5 Ecology Evolution Behavior and Systematics Original Research burning Nature and Landscape Conservation media_common 2. Zero hunger Ecology food and beverages trees 04 agricultural and veterinary sciences Mineralization (soil science) 15. Life on land nitrification savanna Agronomy chemistry 13. Climate action Soil water 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Environmental science Nitrification [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
Zdroj: | Ecology and Evolution Ecology and Evolution, Wiley Open Access, 2021, 11 (15), pp.9958-9969. ⟨10.1002/ece3.7661⟩ Ecology and Evolution, Vol 11, Iss 15, Pp 9958-9969 (2021) |
ISSN: | 2045-7758 |
Popis: | 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. In some humid savannas, perennial grasses inhibit nitrification and trees stimulate nitrification, which likely favors coexistence between trees and grasses. Fires may influence plant capacity to control nitrogen cycling. In this study, after the fire, the archaeal nitrifier transcriptional activities and the nitrification enzymatic activity decreased, 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). |
Databáze: | OpenAIRE |
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