Effects of mechanical and manual harvesting of lugworms Arenicola marina L. on the benthic fauna of tidal flats in the Dutch Wadden sea

1987 ◽  
Vol 39 (3) ◽  
pp. 165-177 ◽  
Author(s):  
Taco van den Heiligenberg
Keyword(s):  
Wadden Sea ◽  
Benthic Fauna ◽  
Tidal Flats ◽  
Arenicola Marina

scholarly journals Marine Turf of an Invasive Alga Ousts Lugworms From Lower Shore

2021 ◽  
Author(s):  
Karsten Reise ◽  
Dagmar Lackschewitz
Keyword(s):  
North Sea ◽  
Wadden Sea ◽  
Benthic Fauna ◽  
Algal Turf ◽  
The Novel ◽  
Mosaic Pattern ◽  
Arenicola Marina ◽  
Lower Shore ◽  
Tide Level ◽  
Invasive Alga

Abstract Bare sandy flats at and below low tide level were observed in 2020 to have been invaded by an introduced grass-like alga, Vaucheria cf. velutina (Xanthophyceae). A dense algal turf accumulated and stabilized mud where resident seniors of the lugworm Arenicola marina had reworked rippled sand. Algae and worms were incompatible. Initially, rising patches with algal turf alternated with bare pits where lugworms crowded. Their bioturbation inhibited young algae, while the felt of established algal rhizoids clogged feeding funnels of worm burrows. Eventually, the mosaic pattern of competitors gave way to a coherent algal turf without lugworms. Concomitantly, a rich small-sized benthic fauna took advantage of the novel algal turf. This exotic Vaucheria has the potential for taking over at the lower shore of the Wadden Sea (eastern North Sea, European Atlantic).

scholarly journals Marine turf of an invasive alga expels lugworms from the lower shore

2021 ◽  
Vol 169 (1) ◽  
Author(s):  
Karsten Reise ◽  
Dagmar Lackschewitz ◽  
K. Mathias Wegner
Keyword(s):  
North Sea ◽  
Wadden Sea ◽  
Benthic Fauna ◽  
Algal Turf ◽  
The Novel ◽  
Mosaic Pattern ◽  
Arenicola Marina ◽  
Lower Shore ◽  
Tide Level ◽  
Invasive Alga

AbstractBare sandy flats at and below low tide level of the Wadden Sea (eastern North Sea, European Atlantic) were observed in 2020 to have been invaded by an introduced grass-like alga, Vaucheria cf. velutina (Xanthophyceae). A dense algal turf accumulated and stabilized mud, where resident seniors of the lugworm Arenicola marina had reworked rippled sand. Algae and worms were incompatible. Initially, rising patches with algal turf alternated with bare pits where lugworms crowded. Their bioturbation inhibited young algae, while the felt of established algal rhizoids clogged feeding funnels of worm burrows. Eventually, a mosaic pattern of competitors gave way to a coherent algal turf without lugworms. Concomitantly, a rich small-sized benthic fauna took advantage of the novel algal turf. This exotic Vaucheria may have the potential for drastically altering the ecological web at the lower shore.

Species composition of foraging birds in association with benthic fauna in four intertidal habitats of the Wadden Sea

2020 ◽  
Vol 233 ◽  
pp. 106537 ◽  
Author(s):  
Sabine Horn ◽  
Philipp Schwemmer ◽  
Moritz Mercker ◽  
Leonie Enners ◽  
Ragnhild Asmus ◽  
...  
Keyword(s):  
Species Composition ◽  
Wadden Sea ◽  
Benthic Fauna ◽  
Intertidal Habitats
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