Significance of Suspension-Feeder Systems on Different Spatial Scales

Asmus, Harald; Asmus, Ragnhild

doi:10.1007/1-4020-3030-4_12

Cited by 16 publications

(8 citation statements)

References 69 publications

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“…The Arenicola sandflat is the most represented intertidal habitat in the bay with 91 km 2 (67%) (Asmus and Asmus 2005). However, Zostera noltii seagrass beds expanded over the last years, from 15 km 2 in 1995 to 83 km 2 (i.e.…”

Section: Sylt-rømø Bightmentioning

confidence: 99%

How do food sources drive meiofauna community structure in soft-bottom coastal food webs?

et al. 2018

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Meiofauna have a strong role in the functioning of coastal ecosystems but how their food sources affect their community structure remains unclear, likely due to the influence of abiotic parameters and the small size of these organisms. The meiofauna and their potential food sources were sampled in several intertidal habitats (i.e. mudflat, seagrass bed, sandflat) of the Marennes-Oléron Bay, France, and the Sylt-Rømø Bight, Germany, to assess the relationships between habitat characteristics and meiofauna community structure. Biomass and quality (carbon/chlorophyll a ratios) of food sources were estimated.Meiofauna community structure based on density and biomass was determined, as well as nematode diversity and feeding types. Meiofauna density and biomass varied highly within habitats and within ecosystems, ranging from 1.7*10 5 ind. m -2 to 3.4*10 6 ind. m -2 and from 0.057 gC m -2 to 1.541 gC m -2 , respectively. Benthic microalgae and sediment organic matter are important drivers in these food webs as the density of two important trophic groups of nematodes, non-selective deposit feeders and epigrowth feeders, varied in accordance with these food sources. No clear relationship was observed between bacterial biomass and selective deposit feeders (i.e. bacterivores) probably due to the high production rate of bacteria. Complementary information about production rates of food source as well as data from trophic markers would provide complimentary information to better understand flows of organic matter in intertidal habitats, particularly for opportunistic species such as non-selective deposit feeders.

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Section: Sylt-rømø Bightmentioning

confidence: 99%

How do food sources drive meiofauna community structure in soft-bottom coastal food webs?

et al. 2018

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“…While mussel beds only occupy small areas of about 1% of the intertidal part, cockles can settle in sandflats and mudflats that form about 70-80% of the inter tidal region (Asmus and Asmus, 2005). may reach high abundances in sandy areas and muddy sands, where they feed on phytoplankton and partly also on resuspended microphytobenthos.…”

Section: Temperate Regionsmentioning

confidence: 99%

“…Trophic interactions between suspension-feeder communities and their ambient environment are among the most important ecological processes in shallow waters and may dominate benthic pelagic coupling particularly in coastal areas (Prins and Smaal, 1990;Dame et al, 1991aDame et al, , 1991bNienhuis, 1992, 1999;Smaal and Haas, 1997;Smaal and Zurburg, 1997;Prins et al, 1998;Asmus and Asmus, 2005). Although this is an important function, there have only been few attempts to quantify the trophic web of suspension-feeder communities integrating the different pathways from grazing phytoplankton to predation by birds (Baird et al, 2007).…”

mentioning

confidence: 99%

Food Web of Intertidal Mussel and Oyster Beds

Asmus

2011

Treatise on Estuarine and Coastal Science

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“…The edible cockle (Mollusca: Cardiidae)— Cerastoderma edule (Linnaeus 1758) is a native, infaunal siphonate, and filter feeder bivalve [ 1 , 2 ]. It occurs in subtidal and intertidal zones in sandy bays and estuaries in coastal areas around the northeast Atlantic from Norway to Morocco and across the Baltic, Mediterranean, and Black Sea [ 3 , 4 ].…”

Section: Introductionmentioning

confidence: 99%

A case study of local ecological knowledge of shellfishers about edible cockle (Cerastoderma edule) in the Ria de Aveiro lagoon, Western Iberia

Braga

Azeiteiro

Magalhães

2022

J Ethnobiology Ethnomedicine

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Background The cockle is available to numerous fishing villages in Europe, especially Portugal. In the Ria de Aveiro, there is a lack of a fisheries management program and the need for new ecological studies on cockle biology, ecology, and conservation. We shared local ecological knowledge (LEK) highlights about the cockle—Cerastoderma edule (Linnaeus 1758) in the Ria de Aveiro in favor of adaptive management of this bioresource. Methods Semi-structured interviews with sixty shellfishers in this coastal lagoon were carried out during April and May 2021. LEK data on the biology and ecology of the cockle were analyzed using an ethical-emic approach and the model of integration of different individual skills. These informal data were compared with previously published data for the species, the Fish Base, and GBIF databases. Results and discussion The average minimum size of the cockle for capture was 23.4 mm, and the average capture per tide was 137.12 kg. The areas with the highest productivity and the most shellfish were RIAV1 and RIAV2. Cockles inhabit areas of sand and mud at an average depth of 2.71 cm. Feeds are mainly small particles, plankton, mud, and algae. The main predators were crabs, European plaice, and bird species. Cockles spawn primarily in late spring and summer. As of 2010, there was a slight decrease in cockle stocks in the Ria de Aveiro due to overfishing, increased rainfall, and changes in the sediment. Considering and analyzing this knowledge is essential for a better understanding of the environmental context the cockles thrive in the view of users of the natural resource. Conclusion Informal data shared by shellfishers in the Ria de Aveiro were typical of filter-feeding bivalves. LEK may assist in planning future management plans for cockles, and unrefuted data may serve as untestable hypotheses. Ethnobiological studies in the Ria de Aveiro lagoon with other species may improve the management of this system since multiple fisheries are carried out in this coastal area.

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Significance of Suspension-Feeder Systems on Different Spatial Scales

Cited by 16 publications

References 69 publications

How do food sources drive meiofauna community structure in soft-bottom coastal food webs?

How do food sources drive meiofauna community structure in soft-bottom coastal food webs?

Food Web of Intertidal Mussel and Oyster Beds

A case study of local ecological knowledge of shellfishers about edible cockle (Cerastoderma edule) in the Ria de Aveiro lagoon, Western Iberia

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