Document of bibliographic reference 23818

BibliographicReference record

Type
Bibliographic resource
Type of document
Journal article
BibLvlCode
AS
Title
Dynamics and trophic roles of heterotrophic protists in the plankton of a freshwater tidal estuary
Abstract
Freshwater tidal estuaries comprise the most upstream reaches of estuaries and are often characterised by the presence of dense bacterial and algal populations which provide a large food source for bacterivorous and algivorous protists. In 1996, the protistan community in the freshwater tidal reaches of the Schelde estuary was monitored to evaluate whether these high food levels are reflected in a similarly high heterotrophic protistan biomass. Protistan distribution patterns were compared to those of metazoan zooplankton to evaluate the possible role of top-down regulation of protists by metazoans. Apart from the algivorous sarcodine Asterocaelum, which reached high densities in summer, heterotrophic protistan biomass was dominated by ciliates and, second in importance, heterotrophic nanoflagellates (HNAN). HNAN abundance was low (annual average 2490 cells ml–1) and did not display large seasonal variation. It is hypothesised that HNAN were top-down controlled by oligotrich ciliates throughout the year and by rotifers in summer. Ciliate abundance was generally relatively high (annual average 65 cells ml–1) and peaked in winter (maximum 450 cells ml–1). The decline of ciliate populations in summer was ascribed to grazing by rotifers, which developed dense populations in that season. In winter, ciliate populations were probably regulated `internally' by carnivorous ciliates (haptorids and Suctoria). Our observations suggest that, in this type of productive ecosystems, the microbial food web is mainly top-down controlled rather than regulated by food availability.
WebOfScience code
https://www.webofscience.com/wos/woscc/full-record/WOS%3A000089348100003
Bibliographic citation
Muylaert, K.; Van Mieghem, R.; Sabbe, K.; Tackx, M.; Vyverman, W. (2000). Dynamics and trophic roles of heterotrophic protists in the plankton of a freshwater tidal estuary. Hydrobiologia 432(1-3): 25-36. https://dx.doi.org/10.1023/A:1004017018702
Topic
Fresh water
Is peer reviewed
true

Authors

author
Name
Koenraad Muylaert
Identifier
https://orcid.org/0000-0001-9645-4063
Affiliation
/id/institute/732
author
Name
Riet Van Mieghem
Affiliation
/id/institute/33
author
Name
Koen Sabbe
Identifier
https://orcid.org/0000-0001-5163-5581
Affiliation
/id/institute/732
author
Name
Micky Tackx
Affiliation
/id/institute/33
author
Name
Wim Vyverman
Identifier
https://orcid.org/0000-0003-0850-2569
Affiliation
/id/institute/732

Links

referenced creativework
type
DOI
accessURL
https://dx.doi.org/10.1023/A:1004017018702

thesaurus terms

term
Dynamics (term code: 2557 - defined in term set: ASFA Thesaurus List)
Estuaries (term code: 2895 - defined in term set: ASFA Thesaurus List)
Heterotrophic organisms (term code: 3993 - defined in term set: ASFA Thesaurus List)
Trophic relationships (term code: 8759 - defined in term set: ASFA Thesaurus List)

taxonomic terms

taxonomic terms associated with this publication
Bacteria
Ciliophora
Rotifera

geographic terms

geographic terms associated with this publication
ANE, Belgium

Document metadata

date created
2002-04-03
date modified
2019-08-28