Expansion of Mnemiopsis leidyi in the French Mediterranean lagoons along the Gulf of Lion

Marchessaux, Guillaume; Belloni, Bruno

doi:10.1016/j.seares.2021.101995

Cited by 5 publications

(2 citation statements)

References 56 publications

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“…This was the case for Berre lagoon's invasion by the ctenophore M. leidyi, where it was not possible to simply trace back this event to hydrological modification or salinity variations (Delpy et al, 2012). This widely recognized invader is rapidly expanding in multiple different lagoon environments, like French Palavasian complex lagoons and Spanish Mar Menor lagoon (Marambio et al, 2013;Marchessaux and Belloni, 2021), and is also well established in the Biguglia lagoon. However, M. leidyi is not the only non-native species in the Biguglia lagoon, as its degraded status in the past probably favored the successful establishment of multiple invasive species in the lagoon.…”

Section: Global Ecological Evolution Contextmentioning

confidence: 99%

“…Other very recent and rapidly wide-spreading invaders in Mediterranean lagoons are the ctenophore Mnemiopsis leidyi (Agassiz, 1865) and the blue crab Callinectes sapidus (Rathbun, 1896). M. leidyi has colonized Mar Menor (Spain), S'Ena Arrubia (Italy), and eight Gulf of Lion French lagoons over the last 20 years, causing direct and indirect negative effects on fishing activities, through physical clogging of fish nets and predation on plankton (Marambio et al, 2013;Diciotti et al, 2016;Marchessaux and Belloni, 2021). C. sapidus invasions reported in Mediterranean lagoons are relatively recent and rapidly growing, probably linked to climate change, but they are extremely detrimental to the environment and fishing activities (Cilenti et al, 2015;Fuentes, 2019;Taybi and Mabrouki, 2020).…”

Section: Introductionmentioning

confidence: 99%

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Long-term ecological trajectories of a disturbed Mediterranean coastal lagoon (Biguglia lagoon): Ecosystem-based approach and considering its resilience for conservation?

Ligorini

Garrido²,

Four

et al. 2022

Front. Mar. Sci.

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Coastal lagoons are subjected to ever-increasing direct or indirect anthropic pressures and are inexorably deteriorating with serious issues regarding their resilience. In this paper, we assessed the functioning and evolution of the highly disturbed Biguglia coastal lagoon (Mediterranean Sea, Corsica) through an ecosystem-based approach (EBA), using multiple biotic and abiotic proxies (hydro-climatic context and eutrophication), considering its connectivity to sea and watershed and biological compartments (macrophytes, phytoplankton, and invasive species) and taking into account human influence (management actions and fishing activities). The aim of this work is firstly to provide a comprehensive analysis of its long-term (2000–2021) ecological evolution trajectory and then, based on these results, to anticipate management strategies for supporting its conservation and restoration, and the maintenance of ecosystem services it offers. Results revealed that while the lagoon showed these days a good capacity to recover after disturbance and absorb change, it recently exhibited considerable changes in its phytoplankton community composition, developed an increased susceptibility to biological invasion, and experienced a drastic reduction in fish stocks. The major interannual variations of the mean salinity, strongly dependent on management interventions beyond natural climatic variability, summarized this instability. In the future, the lagoon may no longer be able to cope with even small disturbances, which could then be sufficient to reach a breakpoint and tip the system permanently into undesired/degraded states. We demonstrated that local and punctual management actions are not always beneficial for the entire ecosystem or even detrimental in some instances. Such a retrospective ecosystem-based approach is fundamental for producing the holistic insights required to implement efficient integrated ecosystem management. This further helps enhance lagoon resilience and hence preserve its ecosystem services in the context of increasing global changes. Such lessons are useful anywhere for comparable ecosystems.

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Section: Global Ecological Evolution Contextmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Long-term ecological trajectories of a disturbed Mediterranean coastal lagoon (Biguglia lagoon): Ecosystem-based approach and considering its resilience for conservation?

Ligorini

Garrido²,

Four

et al. 2022

Front. Mar. Sci.

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An interdisciplinary assessment of the impact of invasive gelatinous zooplankton in a French Mediterranean lagoon

2022

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Assessing the impact of the invasive ctenophore Mnemiopsis leidyi on artisanal fisheries in the Venice Lagoon: an interdisciplinary approach

Piccardi,

Poli,

Sguotti

et al. 2024

Hydrobiologia

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The sea walnut, Mnemiopsis leidyi, has invaded and expanded throughout the whole Mediterranean Sea basin. Large blooms were recorded also in the Venice Lagoon (Italy), an ecosystem rich with biodiversity which supports multiple services, including artisanal fishery production. To investigate M. leidyi impacts on lagoon artisanal fisheries, we combined fishers’ local ecological knowledge, fishery landing time series analysis, and field sampling. Firstly, we interviewed artisanal fishers to date the blooms of M. leidyi. Secondly, we analyzed long-term fishery landings records to detect whether changes in landings quantity and composition were related to the ctenophore invasion. Thirdly, we sampled catches of the lagoon fyke nets. This interdisciplinary approach overcame the weaknesses of single methodologies and allowed us to reconstruct the temporal phases of M. leidyi invasion in the Venice Lagoon. Moreover, our results indicate that the lagoon landings significantly declined with the blooms, paralleled by the increase of water temperature. Finally, we showed that the mechanical obstruction of the nets, caused by the massive ctenophore blooms, strongly impacts fishing activities. Our results are a first step in assessing the short and long-term impacts of this invasive species on lagoon ecosystems, including its socioeconomic consequences, whose better understanding is fundamental to inform mitigation and adaptation measures.

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Expansion of Mnemiopsis leidyi in the French Mediterranean lagoons along the Gulf of Lion

Cited by 5 publications

References 56 publications

Long-term ecological trajectories of a disturbed Mediterranean coastal lagoon (Biguglia lagoon): Ecosystem-based approach and considering its resilience for conservation?

Long-term ecological trajectories of a disturbed Mediterranean coastal lagoon (Biguglia lagoon): Ecosystem-based approach and considering its resilience for conservation?

An interdisciplinary assessment of the impact of invasive gelatinous zooplankton in a French Mediterranean lagoon

Assessing the impact of the invasive ctenophore Mnemiopsis leidyi on artisanal fisheries in the Venice Lagoon: an interdisciplinary approach

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