Too late for regulatory management on Pacific oysters in European coastal waters?

Hansen, Benni Winding; Dolmer, Per; Vismann, Bent

doi:10.1016/j.seares.2022.102331

Cited by 8 publications

(17 citation statements)

References 105 publications

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“…Thieltges et al (2009) demonstrate that the presence of M. gigas in the List tidal basin, Germany, resulted in a decreased burden of parasitic infection of M. edulis. Hansen et al (2023) further suggest that, due to their similar functional ecology to native bivalves, M. gigas can enhance the resilience of an ecosystem, reducing the impacts of potential future biodiversity and biomass reductions on the overall functioning of coastal ecosystems.…”

Section: Examples Of Potential Positive Impact Of M Gigas On Coastal ...mentioning

confidence: 97%

“…M. gigas occurs extensively throughout Europe, and is now distributed from Norway in the north to Cyprus in the south (Hansen et al, 2023). Within the UK, the species can be found as far north as the Shetland Islands, although the greatest numbers are found along the South-West and South-East coastlines (McKnight, 2011;Morgan et al, 2021;Shelmerdine et al, 2017;Syvret et al, 2008).…”

Section: Naturalisation and Dispersal Of M Gigasmentioning

confidence: 99%

“…The authors found significantly higher macrofaunal diversity associated with M. gigas reefs, particularly during the summer months. Hansen et al (2023) report that, in European waters, the presence of M. gigas is likely to lead to equal or higher biodiversity than beds of native bivalves, for example, Blue mussel (Mytilus edulis). Similar patterns are observed in Sweden, where the presence of M. gigas leads to greater abundance of associated organisms than the native M. edulis (Hollander et al, 2015).…”

Section: Examples Of Potential Positive Impact Of M Gigas On Coastal ...mentioning

confidence: 99%

“…Smothering of oyster reefs has also been attempted as a means of control. This process involves the dumping of large quantities of dredged sediment (a layer of >0.2 m thickness) on a reef (Hansen et al, 2023). In theory, this method will choke and starve the oysters, although full mortality is unlikely to be achieved given the depths of mud in which M. gigas can be found in some areas such as the Colne River in Essex, UK.…”

Section: Effectiveness Of Mitigation Strategies To Minimise the Sprea...mentioning

confidence: 99%

“…Eradication is the most extreme of the management options for M. gigas. Other options include mandating the use of unfertile triploid oysters, obtained in hatcheries by crossing female diploid oysters (2n) with male tetraploid oysters (4n) (Hansen et al, 2023). This is often suggested as a strategy in which the spread of oysters from controlled aquaculture facilities into the wild can be minimised (Nell, 2002).…”

Section: Effectiveness Of Mitigation Strategies To Minimise the Sprea...mentioning

confidence: 99%

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Restrictions on UK aquaculture of Pacific oyster (Magallana gigas) will not prevent naturalised spread but suppress ecological and economic benefits to coastal communities

Shakspeare,

Cameron,

Steinke

2024

Preprint

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The Pacific oyster (Magallana (Crassostrea) gigas) was introduced to UK waters in the mid 20th century and currently accounts for over 95% of UK oyster fishery landings. Recently however, its non native origin has led policy makers to consider a limit on UK oyster aquaculture operations. M. gigas is effectively naturalised in the UK, with multiple records of populations originating from non local sources, including from outside the UK. Neighbouring countries, most notably France, treat M. gigas as a naturalised species. The naturalised status simplifies regulation and enables the fishery to provide large quantities of nutritious and sustainable food, supporting employment in coastal communities. Further to this, alongside the potential for detrimental effects this species could have on natural habitats, M. gigas presence can have substantial positive environmental impacts, for example, for improving water quality and by providing living breakwaters for contemporary coastal protection schemes. Our review suggests that efforts to reduce the spread of M. gigas in England are unlikely to have the desired long-term effect and will fundamentally fail due to introductions in Scotland and larval connectivity throughout the southern North Sea. We recommend that UK policy on M. gigas should be updated to reflect the environmental and socioeconomic benefits of Pacific oysters to the shellfish fishery and to open its utility for the provision of nature-based solutions in the adaption to the effects of sea-level rise. Additional location-specific management interventions should focus on suitable mitigation for sensitive sites or to slow spreading events on a case-by-case basis.

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Section: Examples Of Potential Positive Impact Of M Gigas On Coastal ...mentioning

confidence: 97%

Section: Naturalisation and Dispersal Of M Gigasmentioning

confidence: 99%

Section: Examples Of Potential Positive Impact Of M Gigas On Coastal ...mentioning

confidence: 99%

Section: Effectiveness Of Mitigation Strategies To Minimise the Sprea...mentioning

confidence: 99%

Section: Effectiveness Of Mitigation Strategies To Minimise the Sprea...mentioning

confidence: 99%

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Restrictions on UK aquaculture of Pacific oyster (Magallana gigas) will not prevent naturalised spread but suppress ecological and economic benefits to coastal communities

Shakspeare,

Cameron,

Steinke

2024

Preprint

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Beyond annual metrics: Linking seasonal population dynamics to vertical oyster reef growth

Pfennings,

Hoffmann,

Hitzegrad

et al. 2024

Ecology and Evolution

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Oysters are ecosystem engineering species building reef‐like biogenic structures in temperate shallow water environments, serving as biodiversity hotspots. Recently, also their ecosystem services such as fish nursery, pollutants sink and self‐sustaining coastal protection mechanisms came into a research focus. In light of accelerated sea level rise and increasing environmental dynamics, a determination of vertical growth rates of these biosedimentary structures is paramount in assessing their resilience. This study embarked on a comprehensive survey of seasonal vertical reef growth rates using terrestrial laser scanning and related population dynamics of two intertidal reefs built by the non‐native oyster Magallana gigas in the Wadden Sea. We quantified median reef growth at 19.8 mm yr−1 for the Kaiserbalje reef and 17.5 mm yr−1 for the Nordland reef. Additionally, we tested the hypothesis that the seasonal variations in reef growth rates correspond to the local population dynamics, mainly the parameters of shell length and abundance which mirror delayed effects from previous spawning events. Shell growth rates were 0.03–0.06 mm d−1 in winter and 0.10–0.16 mm d−1 in summer, mean oyster abundance from autumn 2019 to spring 2022 was 627 ± 43 ind. m−2 and 338 ± 87 ind. m−2 at the Kaiserbalje and Nordland reefs respectively. Minor reef growth in the topmost reef area reflects an emerging equilibrium of the vertical reef position to actual sea level. Our findings are in accordance with growth of natural Crassostrea virginica reefs on the US East Coast, indicating potential resilience to actual and predicted sea level rise scenarios. Moreover, understanding local hydro‐morphodynamic feedback linked to sea level rise will be vital in predicting the three‐dimensional stability of these biosedimentary structures and habitats.

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Global warming scenarios for the Eastern Adriatic Sea indicate a higher risk of invasiveness of non-native marine organisms relative to current climate conditions

Glamuzina,

Vilizzi,

Piria

et al. 2023

Mar Life Sci Technol

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Too late for regulatory management on Pacific oysters in European coastal waters?

Cited by 8 publications

References 105 publications

Restrictions on UK aquaculture of Pacific oyster (Magallana gigas) will not prevent naturalised spread but suppress ecological and economic benefits to coastal communities

Restrictions on UK aquaculture of Pacific oyster (Magallana gigas) will not prevent naturalised spread but suppress ecological and economic benefits to coastal communities

Beyond annual metrics: Linking seasonal population dynamics to vertical oyster reef growth

Global warming scenarios for the Eastern Adriatic Sea indicate a higher risk of invasiveness of non-native marine organisms relative to current climate conditions

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