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Spatio-temporal patterns in benthic macrofauna on a brackish mudflat (Schelde estuary, NW-Europe): results of ten years monitoring Verbessem, I.; Ysebaert, T.J.; Van den Bergh, E.; Meire, P. (2002). Spatio-temporal patterns in benthic macrofauna on a brackish mudflat (Schelde estuary, NW-Europe): results of ten years monitoring, in: ECSA Local Meeting: ecological structures and functions in the Scheldt Estuary: from past to future, Antwerp, Belgium October 7-10, 2002: abstract book. pp. 67 In: (2002). ECSA Local Meeting: Ecological structures and functions in the Scheldt Estuary: from past to future, Antwerp, Belgium October 7-10, 2002: abstract book. University of Antwerp: Antwerp. 73 + 1 cd-rom pp., meer

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Beschikbaar in	Auteurs
VLIZ: Open access 283398 [ download pdf ]
Documenttype: Samenvatting

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Trefwoorden

Aquatic communities > Benthos Aquatic communities > Benthos > Zoobenthos Distribution > Geographical distribution Ecosystems Environments Monitoring Population characteristics > Population number Sedimentary structures > Mud flats Sediments Spatial variations Taxa > Species > Dominant species Temporal variations Temporal variations > Periodic variations > Seasonal variations Water bodies > Coastal waters > Coastal landforms > Coastal inlets > Estuaries Corophium Latreille, 1806 [WoRMS]; Heteromastus Eisig, 1887 [WoRMS]; Oligochaeta [WoRMS] ANE, Europa, Noordwest [Marine Regions]; België, Schelde R. [Marine Regions]

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Auteurs		Top
Verbessem, I. Ysebaert, T.J. Van den Bergh, E. Meire, P.

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Abstract

Estuarine ecosystems are charac­terized by largely varying physicochemi­cal condi­tions, especially in the meso-/oligohaline zones. Knowledge of the environmental variability and related population effects on a range of spatio-temporal scales is fundamental to a better understanding of their functioning, stability, resilience and the way they are influenced by human impacts. This study combines spatial and temporal variations in macrobenthic populations (and their environment) on a brackish mudflat in the Schelde estuary (NW-Europe). From 1990 to 1999, long -term year-to-year variations were monitored on 24 sites, short -term monthly variations on two sites. The variation in macrobenthos and the physicochemical environment due to seasonal dynamics, spatial pattern, and annual as well as long-term trends, was quantified. The macrobenthic community on the mudflat was characterized by a few dominant species (Corophium, Heteromastus, Nereis, Oligochaeta), with spatial distributions related to sediment characteristics. Considerable year-to-year variation was observed and seasonality was evident for all species. It is argued that in the meso-/oligohaline zone, where salinity shows large seasonal fluctuations, benthic communities change frequently during the year, resulting in communities that seldom progress beyond early benthic-community succession. Annual variations are less pronounced. The impact of the construction of a containerterminal (1994), adjacent to the mudflat, on the macrobentic species distributions is discussed.

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