Changes in the sublittoral hard substrate communities in the Oosterschelde estuary (SW Netherlands), caused by changes in the environmental parameters

Kluijver, M.J. de; Leewis, R. J.

doi:10.1007/978-94-011-1174-4_20

Cited by 12 publications

(14 citation statements)

References 11 publications

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“…The fixed zonation pattern changed its position, owing to the contracted tidal amplitude. The increased overall shelter of the estuary allows sessile animals and plants to grow in spots previously inaccessible (De Kluijver & Leewis, 1994 ;Meier & Waardenburg, 1994) .…”

Section: Responses At the Ecosystem Levelmentioning

confidence: 99%

The Oosterschelde estuary, a case-study of a changing ecosystem: an introduction

Nienhuis

Smaal²

1994

Hydrobiologia

121

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During the period 1980-1990 long-term physical, chemical and ecological studies were carried out, to study the changes induced by the building of a storm-surge barrier in the mouth of the Oosterschelde estuary and two large auxiliary compartment dams in the rear ends of the estuary . The storm-surge barrier was constructed in the mouth of Oosterschelde estuary (SW Netherlands) during the period 1979-1986 . The barrier allows the tides to enter the estuary freely, and, on the other hand, the barrier guarantees safety for the human population and their properties when a stormflood threatens the area .Oosterschelde estuary is isolated from the river input, the rear ends of the ecosystem were separated from the estuary by sea-walls and the strongly decreased tidal exchange with the North Sea induced sheltered circumstances . The Oosterschelde changed from a turbid estuary into a tidal bay, and yet primary production responses appear to be robust and resilient, and the biological communities showed only quantitative shifts from the dominance of specific species assemblages to other assemblages . In many cases predicted changes in the structure of the biological communities could not be verified owing to the large natural variability mainly caused by physical factors (e .g . temperature) . The Delta Project -Storm flood protection in the OosterscheldeThe Netherlands Delta Project covers the socalled Delta area, created by the rivers Rhine, Meuse and Scheldt . Like most delta-estuarine environments, this area represents, in its natural state, complicated ecosystems consisting of a complex hydrodynamic regime, with fast-flowing water masses in tidal channels, changing estuarine configurations, inhomogeneous tidal and subtidal sediments, and salt-marsh areas subject to periodic flooding . The history of the SW Netherlands is marked by a continuous struggle between man and the sea . Since the year 1000 man reclaimed salt-marsh areas and transformed those into agricultural land . But irregularly occurring stormfloods broke the man-built seawalls and recaptured parts of the gained land. On February 1, 1953, a northwesterly storm induced tides to 3 m above normal levels, breached approximately 180 km of coastal-defense dikes and flooded 160000 hectares of polderland . 1835 people lost their lives in this large storm flood, more than 46000 farms and buildings were destroyed or damaged, and approximately 200000 farm animals were lost .The Delta Project, formalized in 1957 by an act

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Section: Responses At the Ecosystem Levelmentioning

confidence: 99%

The Oosterschelde estuary, a case-study of a changing ecosystem: an introduction

Nienhuis

Smaal²

1994

Hydrobiologia

121

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“…They were made using micro-electronic equipment [WTW salinity-conductivity-O 2 meter (Hanna Instruments, Vila do Conde, Portugal), Lovibond Checkit pH-meter (Hanna Instruments)]; water clarity was determined using the Secchi disc (KC Denmark, Research Equipment, Silkeborg, Denmark). Furthermore, the total hydro-dynamism was measured, based on the corrosion of plaster in the water (Kaandorp 1986;Kluijver and Leewis 1994).…”

Section: Abiotic Parametersmentioning

confidence: 99%

Peracarida populations of hard substrate assemblages in ports of the NW Aegean Sea (eastern Mediterranean)

Chintiroglou

Antoniadou

Baxevanis

et al. 2004

Helgoland Marine Research

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This study deals with the structure of Peracarida populations in four ports in the NW Aegean Sea, Greece, and with the degree this structure is influenced by the particular biotic and abiotic conditions that prevail in the ports. Quantitative samples were taken during summer and winter in two successive years from artificial hard substrates and were analysed using common biocoenotic methods. The examination of approximately 81,250 specimens revealed the presence of 24 Peracarida species, the most dominant of which were Corophium acutum, Leptochelia savignyi and Elasmopus rapax. All species are very common and have been reported from many sites and assemblages in the N Aegean Sea. The ratios of certain Peracarida genera are discussed as possible indicators of environmental health that may be used in long-term biomonitoring programmes on the impact of pollution in harbours.

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“…Therefore, our deWnition of communities used here is a directly or indirectly interacting assemblage of algae and invertebrates which remains stable in time under a given set of abiotic factors. This classiWcation allows to recognise diVerent intertidal communities and to identify changes within its elements (de Kluijver 1997). In this concept, biotic interactions are not negated, but compared to the regulation by the physical environment they are considered of minor importance.…”

Section: Discussionmentioning

confidence: 99%

“…hydrozoans, mussels, tube-building polychaetes). The encrusting layer (EL) was formed by epilithic organisms adhering directly to the substratum, such as bryozoans or encrusting algae of the genus Phymatolithon or Ralfsia (see also de Kluijver 1991de Kluijver , 1993de Kluijver , 1997.…”

Section: Survey Methodsmentioning

confidence: 99%

“…The classiWcation method based on logarithmically transformed data used the BrayCurtis similarity index and the average linkage method for clustering was applied. For the distinction of communities, the variable stopping rule was used, as it allows for diVerences in the mosaic species composition in diVerent communities (de Kluijver 1997). For cluster analysis the programme PRIMER 5 was used.…”

Section: Community Analysismentioning

confidence: 99%

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Community composition of the rocky intertidal at Helgoland (German Bight, North Sea)

2008

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At the rocky island of Helgoland (North Sea), the distribution and abundances of intertidal communities were assessed and the eVects of wave exposure and tidal height on the spatial distribution patterns of the communities were evaluated. Macroalgae and invertebrates were sampled quantitatively along line transects in three intertidal locations, a semi-exposed, an exposed and a sheltered one. The semi-exposed location was characterised by (1) Ulva spp. at the high intertidal (Ulva-community), (2) mussels and periwinkles at the mid intertidal (Mytilus-community) and (3) Corallina oYcinalis and mainly the large brown alga Fucus serratus at the low intertidal (Fucuscommunity). The exposed location encompassed the mid and low intertidal; at both zones the Fucus-community occurred. The sheltered location was characterised by (1) barnacles (Balanus-community) and (2) bryozoans, hydrozoans and mainly the large brown alga Ascophyllum nodosum (Ascophyllum-community). At the semi-exposed, but not at the exposed location the communities changed with the intertidal position. A relationship between wave exposure and the occurrence of speciWc communities was shown for the sheltered location; in contrast, communities of the semi-exposed and the exposed location appear to be little inXuenced by wave exposure directly. The community concept and the potential causes of distribution patterns of the deWned communities are discussed and suggestions for a future monitoring are given. Variations in the communities at diVerent spatial scales speak in favour of a multiple scale sampling design to monitor changes in the intertidal communities at Helgoland.

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Changes in the sublittoral hard substrate communities in the Oosterschelde estuary (SW Netherlands), caused by changes in the environmental parameters

Cited by 12 publications

References 11 publications

The Oosterschelde estuary, a case-study of a changing ecosystem: an introduction

The Oosterschelde estuary, a case-study of a changing ecosystem: an introduction

Peracarida populations of hard substrate assemblages in ports of the NW Aegean Sea (eastern Mediterranean)

Community composition of the rocky intertidal at Helgoland (German Bight, North Sea)

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