AustralieFrV1, PascalFrancis, Corpus, bibRecord, 002044

Hidden diversity among aquatic heterotrophic flagellates: ecological potentials of zoosporic fungi

Identifieur interne : 002044 ( PascalFrancis/Corpus ); précédent : 002043; suivant : 002045

Hidden diversity among aquatic heterotrophic flagellates: ecological potentials of zoosporic fungi

Auteurs : Télesphore Sime-Ngando ; Emilie Lefevre ; Frank H. Gleason

Source :

Hydrobiologia : (The Hague) [ 0018-8158 ] ; 2011.

RBID : Pascal:11-0083746

Descripteurs français

Pascal (Inist)
- Diversité, Hétérotrophie, Ecologie, Microorganisme, Réseau trophique, Dynamique, Hydrobiologie, Milieu aquatique, Fungi.

English descriptors

KwdEn :
- Aquatic environment, Diversity, Dynamics, Ecology, Food web, Fungi, Heterotrophy, Hydrobiology, Microorganism.

Abstract

Since the emergence of the 'microbial loop' concept, heterotrophic flagellates have received particular attention as grazers in aquatic ecosystems. These microbes have historically been regarded incorrectly as a homogeneous group of bacterivorous protists in aquatic systems. More recently, environmental rDNA surveys of small heterotrophic flagellates in the pelagic zone of freshwater ecosystems have provided new insights. (i) The dominant phyla found by molecular studies differed significantly from those known from morphological studies with the light microscope, (ii) the retrieved phylotypes generally belong to well-established eukaryotic clades, but there is a very large diversity within these clades and (iii) a substantial part of the retrieved sequences cannot be assigned to bacterivorous but can be assigned instead to parasitic and saprophytic organisms, such as zoosporic true fungi (chytrids), fungus-like organisms (stramenopiles), or virulent alveolate parasites (Perkinsozoa and Amoebophrya sp.). All these microorganisms are able to produce small zoospores to assure dispersal in water during their life-cycles. Based on the existing literature on true fungi and fungus-like organisms, and on the more recently published eukaryotic rDNA environmental studies and morphological observations, we conclude that previously overlooked microbial diversity and related ecological potentials require intensive investigation (i) for an improved understanding of the roles of heterotrophic flagellates in pelagic ecosystems and (ii) to properly integrate the concept of 'the microbial loop' into modem pelagic microbial ecology.

Notice en format standard (ISO 2709)

Pour connaître la documentation sur le format Inist Standard.

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Format Inist (serveur)

NO :	PASCAL 11-0083746 INIST
ET :	Hidden diversity among aquatic heterotrophic flagellates: ecological potentials of zoosporic fungi
AU :	SIME-NGANDO (Télesphore); LEFEVRE (Emilie); GLEASON (Frank H.); SIME-NGANDO (Télesphore); NIQUIL (Nathalie)
AF :	LMGE, Laboratoire Microorganismes: Génome & Environnement, UMR CNRS 6023, Université Blaise Pascal, Clermont-Ferrand II/63177 Aubière/France (1 aut., 2 aut.); School of Biological Sciences A12, University of Sydney/Sydney, NSW 2006/Australie (3 aut.); Lab. 'Microorganismes: Génome & Environnement', UMR CNRS 6023, Université Blaise Pascal/63177 Aubière/France (1 aut.); LIENSs (Littoral Environnement et Sociétés), UMR CNRS 6250, Université de la Rochelle, 2 rue Olympe de Gouge/17000 La Rochelle/France (2 aut.)
DT :	Publication en série; Niveau analytique
SO :	Hydrobiologia : (The Hague); ISSN 0018-8158; Coden HYDRB8; Pays-Bas; Da. 2011; Vol. 659; Pp. 5-22; Bibl. 5 p.1/4
LA :	Anglais
EA :	Since the emergence of the 'microbial loop' concept, heterotrophic flagellates have received particular attention as grazers in aquatic ecosystems. These microbes have historically been regarded incorrectly as a homogeneous group of bacterivorous protists in aquatic systems. More recently, environmental rDNA surveys of small heterotrophic flagellates in the pelagic zone of freshwater ecosystems have provided new insights. (i) The dominant phyla found by molecular studies differed significantly from those known from morphological studies with the light microscope, (ii) the retrieved phylotypes generally belong to well-established eukaryotic clades, but there is a very large diversity within these clades and (iii) a substantial part of the retrieved sequences cannot be assigned to bacterivorous but can be assigned instead to parasitic and saprophytic organisms, such as zoosporic true fungi (chytrids), fungus-like organisms (stramenopiles), or virulent alveolate parasites (Perkinsozoa and Amoebophrya sp.). All these microorganisms are able to produce small zoospores to assure dispersal in water during their life-cycles. Based on the existing literature on true fungi and fungus-like organisms, and on the more recently published eukaryotic rDNA environmental studies and morphological observations, we conclude that previously overlooked microbial diversity and related ecological potentials require intensive investigation (i) for an improved understanding of the roles of heterotrophic flagellates in pelagic ecosystems and (ii) to properly integrate the concept of 'the microbial loop' into modem pelagic microbial ecology.
CC :	002A14B04A
FD :	Diversité; Hétérotrophie; Ecologie; Microorganisme; Réseau trophique; Dynamique; Hydrobiologie; Milieu aquatique; Fungi
ED :	Diversity; Heterotrophy; Ecology; Microorganism; Food web; Dynamics; Hydrobiology; Aquatic environment; Fungi
SD :	Diversidad; Heterotrofía; Ecología; Microorganismo; Red trófica; Dinámica; Hidrobiología; Medio acuático; Fungi
LO :	INIST-5329.354000191848610010
ID :	11-0083746

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Pascal:11-0083746

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<front><div type="abstract" xml:lang="en">Since the emergence of the 'microbial loop' concept, heterotrophic flagellates have received particular attention as grazers in aquatic ecosystems. These microbes have historically been regarded incorrectly as a homogeneous group of bacterivorous protists in aquatic systems. More recently, environmental rDNA surveys of small heterotrophic flagellates in the pelagic zone of freshwater ecosystems have provided new insights. (i) The dominant phyla found by molecular studies differed significantly from those known from morphological studies with the light microscope, (ii) the retrieved phylotypes generally belong to well-established eukaryotic clades, but there is a very large diversity within these clades and (iii) a substantial part of the retrieved sequences cannot be assigned to bacterivorous but can be assigned instead to parasitic and saprophytic organisms, such as zoosporic true fungi (chytrids), fungus-like organisms (stramenopiles), or virulent alveolate parasites (Perkinsozoa and Amoebophrya sp.). All these microorganisms are able to produce small zoospores to assure dispersal in water during their life-cycles. Based on the existing literature on true fungi and fungus-like organisms, and on the more recently published eukaryotic rDNA environmental studies and morphological observations, we conclude that previously overlooked microbial diversity and related ecological potentials require intensive investigation (i) for an improved understanding of the roles of heterotrophic flagellates in pelagic ecosystems and (ii) to properly integrate the concept of 'the microbial loop' into modem pelagic microbial ecology.</div>
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<ET>Hidden diversity among aquatic heterotrophic flagellates: ecological potentials of zoosporic fungi</ET>
<AU>SIME-NGANDO (Télesphore); LEFEVRE (Emilie); GLEASON (Frank H.); SIME-NGANDO (Télesphore); NIQUIL (Nathalie)</AU>
<AF>LMGE, Laboratoire Microorganismes: Génome & Environnement, UMR CNRS 6023, Université Blaise Pascal, Clermont-Ferrand II/63177 Aubière/France (1 aut., 2 aut.); School of Biological Sciences A12, University of Sydney/Sydney, NSW 2006/Australie (3 aut.); Lab. 'Microorganismes: Génome & Environnement', UMR CNRS 6023, Université Blaise Pascal/63177 Aubière/France (1 aut.); LIENSs (Littoral Environnement et Sociétés), UMR CNRS 6250, Université de la Rochelle, 2 rue Olympe de Gouge/17000 La Rochelle/France (2 aut.)</AF>
<DT>Publication en série; Niveau analytique</DT>
<SO>Hydrobiologia : (The Hague); ISSN 0018-8158; Coden HYDRB8; Pays-Bas; Da. 2011; Vol. 659; Pp. 5-22; Bibl. 5 p.1/4</SO>
<LA>Anglais</LA>
<EA>Since the emergence of the 'microbial loop' concept, heterotrophic flagellates have received particular attention as grazers in aquatic ecosystems. These microbes have historically been regarded incorrectly as a homogeneous group of bacterivorous protists in aquatic systems. More recently, environmental rDNA surveys of small heterotrophic flagellates in the pelagic zone of freshwater ecosystems have provided new insights. (i) The dominant phyla found by molecular studies differed significantly from those known from morphological studies with the light microscope, (ii) the retrieved phylotypes generally belong to well-established eukaryotic clades, but there is a very large diversity within these clades and (iii) a substantial part of the retrieved sequences cannot be assigned to bacterivorous but can be assigned instead to parasitic and saprophytic organisms, such as zoosporic true fungi (chytrids), fungus-like organisms (stramenopiles), or virulent alveolate parasites (Perkinsozoa and Amoebophrya sp.). All these microorganisms are able to produce small zoospores to assure dispersal in water during their life-cycles. Based on the existing literature on true fungi and fungus-like organisms, and on the more recently published eukaryotic rDNA environmental studies and morphological observations, we conclude that previously overlooked microbial diversity and related ecological potentials require intensive investigation (i) for an improved understanding of the roles of heterotrophic flagellates in pelagic ecosystems and (ii) to properly integrate the concept of 'the microbial loop' into modem pelagic microbial ecology.</EA>
<CC>002A14B04A</CC>
<FD>Diversité; Hétérotrophie; Ecologie; Microorganisme; Réseau trophique; Dynamique; Hydrobiologie; Milieu aquatique; Fungi</FD>
<ED>Diversity; Heterotrophy; Ecology; Microorganism; Food web; Dynamics; Hydrobiology; Aquatic environment; Fungi</ED>
<SD>Diversidad; Heterotrofía; Ecología; Microorganismo; Red trófica; Dinámica; Hidrobiología; Medio acuático; Fungi</SD>
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Hidden diversity among aquatic heterotrophic flagellates: ecological potentials of zoosporic fungi

Hidden diversity among aquatic heterotrophic flagellates: ecological potentials of zoosporic fungi

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