Allelopathic inhibition of primary producer growth and photosynthesis by aquatic fungi

Allen, Joey; Leflaive, Joséphine; Bringuier, Charlotte; Ten-Hage, Loı̈c; Chauvet, Éric; Cornut, Julien; Danger, Michaël

doi:10.1016/j.funeco.2017.07.001

Cited by 16 publications

(6 citation statements)

References 22 publications

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“…v) Fungi-primary producers Zoosporic fungi are well known as parasites of freshwater and marine phytoplankton 23 and mutualistic symbiosis are rare exceptions 141 . Other antagonistic interactions such as allelopathic interactions between diatoms and aquatic hyphomycetes fungi have been demonstrated to negatively affect primary production in biofilms 142 . In contrast, mutualism is the predominant life form of aquatic lichens in freshwater and marine ecosystems 143 , yet rather little is known about their ecological role.…”

Section: Box 1: Biotic Interactions With Aquatic Fungimentioning

confidence: 99%

Fungi in aquatic ecosystems

et al. 2019

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Fungi are phylogenetically and functionally diverse ubiquitous components of almost all ecosystems on Earth, including aquatic environments stretching from high montane lakes down to the deep ocean. Aquatic ecosystems, however, remain frequently overlooked as fungal habitats, although fungi potentially hold important roles for organic matter cycling and food web dynamics. Within a broad ecological framework, we conceptualize the spatio-temporal dimensions, diversity, functions and organismic interactions of fungi in structuring aquatic foodwebs. We focus on currently unexplored fungal diversity, highlighting poorly understood ecosystems, including emerging artificial aquatic habitats. Recent methodological improvements have facilitated a greater appreciation of the importance of fungi in many aquatic systems, yet a conceptual framework is still missing. To date, aquatic fungi and their interactions have largely remained "hidden" and require interdisciplinary efforts to be explored in an ecosystem context. There remain obvious methodological and knowledge gaps to explore potential functions of aquatic fungi, moving from the microscale to the global scale. This knowledge is urgently needed since we humans strongly interfere with structure and function of natural ecosystems by permanently reshaping most of the Earth's surface and creating vast areas of novel urban habitats. Introduction: Recent advances in DNA sequencing technology have revealed that fungi are abundant in many, if not all aquatic ecosystems, however their diversity, quantitative abundance, ecological function and, in particular, their interactions with other microorganisms, remain largely speculative, unexplored and missing from current general concepts in aquatic ecology and biogeochemistry 1-4. This is surprising since terrestrial-focused research has understood the outstanding ecological role of fungi for >100 years, and therefore fungi constitute a major component of general concepts in terrestrial science 5,6. In aquatic ecosystems, the systematic analysis of fungal diversity and their ecological roles has faced several setbacks due to methodological limitations and a too small scientific community, in particular in the marine environment 7-11. This review focusses on aquatic fungi, which form a morphologically, phylogenetically, and ecologically diverse group 7. We here broadly define "aquatic fungi" as fungi that rely for the whole or part of their life cycle on aquatic habitats (FIG. 1). Three groups (indwellers, periodic immigrants and versatile immigrants) based on their degree of adaptation and dependence on aquatic habitats have been previously defined 12. We highlight the numerous knowledge gaps in their diversity, interactions and functional roles, as well as methodological limitations. In this review we propose new research avenues to set aquatic fungi in a broad ecological framework. Here, we do not explore the many existing gaps in the fungal phylogenetic tree. In aquatic systems, fungi constitute a significant proportion of eukaryo...

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Section: Box 1: Biotic Interactions With Aquatic Fungimentioning

confidence: 99%

Fungi in aquatic ecosystems

et al. 2019

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“…This trait, combined with high growth rates, may be responsible for its dominance in both mixed assemblages in the decomposition test (S medium). While the importance of competition for AH succession and community structure in salinized environments seems clear (see [32,39,64]), our results also underline its unpredictability under natural conditions. Overall, our results corroborate the hypothesis that AHs are highly halotolerant [22], which may largely guarantee leaf litter processing in temporary or historically salt-contaminated streams.…”

Section: Discussionmentioning

confidence: 45%

Section: Discussionmentioning

confidence: 45%

Are fungal strains from salinized streams adapted to salt-rich conditions?

Gonçalves

Carvalho

Bärlocher

et al. 2018

Phil. Trans. R. Soc. B

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“…) and, in particular, with the most abundant and diverse subphylum, the Pezizomycotina. This observed pattern of negative fungi‐diatoms associations could be explained by antagonistic interactions, such as allelopathic interactions between aquatic fungi and diatoms that have previously been reported and showed a negative impact of fungi on primary production (Allen et al ., ).…”

Section: Discussionmentioning

confidence: 97%

Analysis of interdomain taxonomic patterns in urban street mats

Hervé

Lopez

2020

Environmental Microbiology

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Summary Streets are constantly crossed by billions of vehicles and pedestrians. Their gutters, which convey stormwater and contribute to waste management, and are important for human health and well‐being, probably play a number of ecological roles. Street surfaces may also represent an important part of city surface areas. To better characterize the ecology of this yet poorly explored compartment, we used filtration and DNA metabarcoding to address microbial community composition and assembly across the city of Paris, France. Diverse bacterial and eukaryotic taxonomic groups were identified, including members involved in key biogeochemical processes, along with a number of parasites and putative pathogens of human, animals and plants. We showed that the beta diversity patterns between bacterial and eukaryotic communities were correlated, suggesting interdomain associations. Beta diversity analyses revealed the significance of biotic factors (cohesion metrics) in shaping gutter microbial community assembly and, to a lesser extent, the contribution of abiotic factors (pH and conductivity). Co‐occurrences analysis confirmed contrasting non‐random patterns both within and between domains of life, specifically when comparing diatoms and fungi. Our results highlight microbial coexistence patterns in streets and reinforce the need to further explore biodiversity in urban ground transportation infrastructures.

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Allelopathic inhibition of primary producer growth and photosynthesis by aquatic fungi

Cited by 16 publications

References 22 publications

Fungi in aquatic ecosystems

Fungi in aquatic ecosystems

Are fungal strains from salinized streams adapted to salt-rich conditions?

Analysis of interdomain taxonomic patterns in urban street mats

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