ORCID Profile
0000-0001-6887-0414
Current Organisation
UniLaSalle - Campus de Rouen
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Publisher: Elsevier BV
Date: 2022
DOI: 10.2139/SSRN.4004965
Publisher: California Digital Library (CDL)
Date: 22-02-2022
Publisher: Elsevier BV
Date: 02-2021
Publisher: California Digital Library (CDL)
Date: 29-07-2019
Publisher: No publisher found
Date: 2019
Publisher: Springer Science and Business Media LLC
Date: 24-02-2022
DOI: 10.1007/S00374-022-01627-Y
Abstract: The influence of soil phosphorous (P) content on the N-cycling communities and subsequent effects on N 2 O emissions remains unclear. Two laboratory incubation experiments were conducted on soils collected from a long-term (est. 1995) P-addition field trial s led in summer 2018 and winter 2019. Incubations were treated with a typical field amendment rate of N as well as a C-amendment to stimulate microbial activity. Throughout both incubations, soil subs les were collected prior to fertiliser amendment and then throughout the incubations, to quantify the abundance of bacteria (16S rRNA ), fungi (ITS) and Thaumarcheota (16S rRNA ) as well as functional guilds of genes involved in nitrification (bacterial and archaeal amoA, and comammox) and denitrification ( nirS , nirK , nosZ clade I and II) using quantitative PCR (qPCR). We also evaluated the correlations between each gene abundance and the associated N 2 O emissions depending on P-treatments. Our results show that long-term P-application influenced N-cycling genes abundance differently. Except for comammox, overall nitrifiers’ genes were most abundant in low P while the opposite trend was found for denitrifiers’ genes. C and N-amendments strongly influenced the abundance of most genes with changes observed as soon as 24 h after application. ITS was the only gene correlated to N 2 O emissions in the low P-soils while microbes were mostly correlated to emissions in high P, suggesting possible changes in the organisms involved in N 2 O production depending on soil P-content. This study highlights the importance of long-term P addition on shaping the microbial community function which in turn stimulates a direct impact on the subsequent N emissions.
Publisher: California Digital Library (CDL)
Date: 23-02-2023
DOI: 10.32942/X2CS33
Abstract: Across free-living organisms, the ecology and evolution of offspring morphology is shaped by interactions with biotic and abiotic environments during dispersal and early establishment in new habitats. However, the ecology and evolution of offspring morphology for symbiotic species has been largely ignored despite host-symbiont interactions being ubiquitous in all ecosystems and across all branches of the tree of life. The kingdom Fungi provides an excellent opportunity to address this fundamental knowledge gap since symbiosis has been a major driver in trait evolution of this group. We assembled a database of fungal offspring morphology covering over 26,000 species of free-living to symbiotic fungi, including symbiotic relationships with plants, insects and humans and found more than eight orders of variation in offspring size. Evolutionary shifts in symbiotic status correlated with shifts in spore size, but the strength of this effect varied widely among phyla. Among plant associated fungi, symbiotic status explained more variation than environmental gradients in the current distribution of offspring sizes at a global scale while being plant-associated limited the dispersal potential of fungal spores: in free-living saprotrophic fungi shifts to smaller spore size correlated with larger species’ extent of occurrence while in plant associated fungi this relationship does not hold. Our work advances life-history theory by highlighting how the interaction between symbiosis and offspring morphology shapes the reproductive and dispersal strategies among living forms
Publisher: Wiley
Date: 17-06-2023
DOI: 10.1111/ELE.14271
Abstract: Despite host‐fungal symbiotic interactions being ubiquitous in all ecosystems, understanding how symbiosis has shaped the ecology and evolution of fungal spores that are involved in dispersal and colonization of their hosts has been ignored in life‐history studies. We assembled a spore morphology database covering over 26,000 species of free‐living to symbiotic fungi of plants, insects and humans and found more than eight orders of variation in spore size. Evolutionary transitions in symbiotic status correlated with shifts in spore size, but the strength of this effect varied widely among phyla. Symbiotic status explained more variation than climatic variables in the current distribution of spore sizes of plant‐associated fungi at a global scale while the dispersal potential of their spores is more restricted compared to free‐living fungi. Our work advances life‐history theory by highlighting how the interaction between symbiosis and offspring morphology shapes the reproductive and dispersal strategies among living forms.
Publisher: Springer Science and Business Media LLC
Date: 30-01-2019
Publisher: Wiley
Date: 03-09-2019
Publisher: Elsevier BV
Date: 05-2022
Publisher: Wiley
Date: 12-03-2018
DOI: 10.1111/MEC.14536
Abstract: Future climate scenarios predict changes in rainfall regimes. These changes are expected to affect plants via effects on the expression of root traits associated with water and nutrient uptake. Associated microorganisms may also respond to these new precipitation regimes, either directly in response to changes in the soil environment or indirectly in response to altered root trait expression. We characterized arbuscular mycorrhizal (AM) fungal communities in an Australian grassland exposed to experimentally altered rainfall regimes. We used Illumina sequencing to assess the responses of AM fungal communities associated with four plant species s led in different watering treatments and evaluated the extent to which shifts were associated with changes in root traits. We observed that altered rainfall regimes affected the composition but not the richness of the AM fungal communities, and we found distinctive communities in the increased rainfall treatment. We found no evidence of altered rainfall regime effects via changes in host physiology because none of the studied traits were affected by changes in rainfall. However, specific root length was observed to correlate with AM fungal richness, while concentrations of phosphorus and calcium in root tissue and the proportion of root length allocated to fine roots were correlated to community composition. Our study provides evidence that climate change and its effects on rainfall may influence AM fungal community assembly, as do plant traits related to plant nutrition and water uptake. We did not find evidence that host responses to altered rainfall drive AM fungal community assembly in this grassland ecosystem.
Publisher: Elsevier BV
Date: 08-2020
Publisher: Wiley
Date: 09-04-2020
DOI: 10.1111/NPH.16527
Location: Ireland
No related grants have been discovered for Coline Deveautour.