Document of bibliographic reference 201885

BibliographicReference record

Type
Bibliographic resource
Type of document
Book chapters
BibLvlCode
AMS
Title
The subtidal macrobenthos in the mesohaline part of the Schelde Estuary (Belgium): influenced by man?
Abstract
The macrobenthos of the subtidal, mesohaline zone of the Schelde Estuary (Belgium) was sampled in October 1996 and 1997 at 54 and 73 sampling locations respectively. Sediments ranged fr om silty to very coarse, with the dominant sediment type being silt (33% of all locations). Of the 35 macrobenthic species observed, only seven species occurred in more than 20% of the samples. The polychaete Heteromastus filiformis and Oligochaeta were most common. Multivariate techniques revealed three distinct communities, linked mainly with sedimentological factors: (1) a species-poor (nine species) community with a dominance of the amphipod Bathyporeia pilosa, a low mean abundance and biomass (86 ind/m², 0.0189 g ash-free dry weight (AFDW)/m²), and a mean median grain size of 215 +/- 19 µm (fine sand); (2) a species-rich (22) community, with the small polychaete Polydora ligerica as indicator species, a relatively high mean abundance and biomass (2298 ind/m², 1.395 g AFDW/m², oysters excluded), a mean median grain size of 133 +/- 41 µm, and also the occurrence of sediments with hard substrates being characteristic for this community; (3) a community with an intermediate species richness (12), abundance and biomass (248 ind/m², 0.249 g AFDW/m²), with H. filiformis and Oligochaeta as indicator species, and a median grain size of 76 +/- 9 µm. In the study area several typical brackish water species were observed (e.g. Polydora ligerica, Corophium lacustre, Gammarus salinus). Mean total abundance and biomass were very low, and the benthic communities appeared to be under stress, with a dominance of mainly small, subsurface deposit and surface deposit feeding opportunistic species. This is probably a combined effect of both natural physical and human-induced disturbance. Only sediments with hard substrates (e.g. rocks) seems to favour species richness, providing a shelter against physical disturbance.
Bibliographic citation
Ysebaert, T.J.; De Neve, L.; Meire, P. (2000). The subtidal macrobenthos in the mesohaline part of the Schelde Estuary (Belgium): influenced by man?, in: Ysebaert, T.J. Macrozoobenthos and waterbirds in the estuarine environment: spatio-temporal patterns at different scales = Macrozoöbenthos en watervogels in het Schelde-estuarium, ruimtelijke en temporele patronen. Mededelingen van het Instituut voor Natuurbehoud, 16: pp. 98-110
location created
Kliniekstraat 25
Topic
Marine
Brakish water
Access rights
open access
Is accessible for free
true

Authors

author
Name
Tom Ysebaert
Affiliation
/id/institute/16
author
Name
Liesbeth De Neve
Identifier
https://orcid.org/0000-0003-0041-9824
Affiliation
/id/institute/16
author
Name
Patrick Meire
Identifier
https://orcid.org/0000-0003-2599-5350
Affiliation
/id/institute/16

thesaurus terms

term
Biological stress (term code: 990 - defined in term set: ASFA Thesaurus List)
Community composition (term code: 1730 - defined in term set: ASFA Thesaurus List)
Environmental effects (term code: 2807 - defined in term set: ASFA Thesaurus List)
Man-induced effects (term code: 4940 - defined in term set: ASFA Thesaurus List)
Particle size (term code: 6024 - defined in term set: ASFA Thesaurus List)
Salinity effects (term code: 7096 - defined in term set: ASFA Thesaurus List)
Sediment properties (term code: 7378 - defined in term set: ASFA Thesaurus List)
Silting (term code: 7666 - defined in term set: ASFA Thesaurus List)
Zoobenthos (term code: 9438 - defined in term set: ASFA Thesaurus List)

Other terms

other terms associated with this publication
Gammarus salinus
heteromastus filiformis
Bathyporeia pilosa
Corophium lacustre
Polydora ligerica

geographic terms

geographic terms associated with this publication
Belgium, Zeeschelde

Document metadata

date created
2011-01-27
date modified
2019-09-20