Biological Invasions in the Aegean Sea: Temporal Trends, Pathways, and Impacts

Katsanevakis, Stelios; Zenetos, Argyro; Tsiamis, Konstantinos

doi:10.1007/698_2020_642

Cited by 19 publications

(11 citation statements)

References 84 publications

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“…Northern areas, like the Adriatic Sea and the Gulf of Lions in the western Mediterranean, characterized by colder thermal conditions, are predicted to act as both a refuge and a 'trap' for cold-water species if warming intensifies (Ben Rais Lasram et al, 2010). On the other hand, the Aegean Sea, which is projected to host a substantial number of high climate risk species, is already impacted by growing populations of invasive species, most of which are Lessepsian thermophilic migrants (Katsanevakis, Zenetos, et al, 2020). Therefore, different areas of the Mediterranean basin would have to cope with different conflicts according to the particular pressures they face, thus, necessitating differing management measures.…”

Section: Discussionmentioning

confidence: 99%

Are Mediterranean marine threatened species at high risk by climate change?

Chatzimentor

Doxa

Katsanevakis

et al. 2023

Global Change Biology

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Rapid anthropogenic climate change is driving threatened biodiversity one step closer to extinction. Effects on native biodiversity are determined by an interplay between species' exposure to climate change and their specific ecological and life‐history characteristics that render them even more susceptible. Impacts on biodiversity have already been reported, however, a systematic risk evaluation of threatened marine populations is lacking. Here, we employ a trait‐based approach to assess the risk of 90 threatened marine Mediterranean species to climate change, combining species' exposure to increased sea temperature and intrinsic vulnerability. One‐quarter of the threatened marine biodiversity of the Mediterranean Sea is predicted to be under elevated levels of climate risk, with various traits identified as key vulnerability traits. High‐risk taxa including sea turtles, marine mammals, Anthozoa and Chondrichthyes are highlighted. Climate risk, vulnerability and exposure hotspots are distributed along the Western Mediterranean, Alboran, Aegean, and Adriatic Seas. At each Mediterranean marine ecoregion, 21%–31% of their threatened species have high climate risk. All Mediterranean marine protected areas host threatened species with high risk to climate change, with 90% having a minimum of 4 up to 19 species of high climate risk, making the objective of a climate‐smart conservation strategy a crucial task for immediate planning and action. Our findings aspire to offer new insights for systematic, spatially strategic planning and prioritization of vulnerable marine life in the face of accelerating climate change.

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Section: Discussionmentioning

confidence: 99%

Are Mediterranean marine threatened species at high risk by climate change?

Chatzimentor

Doxa

Katsanevakis

et al. 2023

Global Change Biology

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“…toxicity; Bentur et al, 2008; Galanidi et al, 2019) or (iii) commercial exploitation (e.g. for human consumption; Katsanevakis et al, 2020; Morris, 2012; Streftaris & Zenetos, 2006). The list of species selected based on an IUCN report (Otero et al, 2013), literature (Streftaris & Zenetos, 2006) and expert judgement is by no means exhaustive, but its purpose is to illustrate the innovative method presented herein.…”

Section: Methodsmentioning

confidence: 99%

“…toxicity; Bentur et al, 2008;Galanidi et al, 2019) or (iii) commercial exploitation (e.g. for human consumption; Katsanevakis et al, 2020;Morris, 2012;Streftaris & Zenetos, 2006).…”

Section: Studied Species and Origin Of Occurrence Datamentioning

confidence: 99%

Improving predictions of invasive fish ranges combining functional and ecological traits with environmental suitability under climate change scenarios

Schickele

Guidetti

Giakoumi

et al. 2021

Global Change Biology

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Biological invasions represent one of the main threats to marine biodiversity. From a conservation perspective, especially in the context of increasing sea warming, it is critical to examine the suitability potential of geographical areas for the arrival of Range-Expanding Introduced and Native Species (REINS), and hence anticipate the risk of such species to become invasive in their new distribution areas. Here, we developed an empirical index, based on functional and bio-ecological traits, that estimates the Invasive Potential (IP; i.e. the potential success in transport, introduction and population establishment) for a set of 13 fishes that are expanding their distributional range into the Mediterranean Sea, the most invaded sea in the world. The IP index showed significant correlation with the observed spreading of REINS. For the six species characterized by the highest IP, we calculated contemporary and future projections of their Environmental Suitability Index (ESI). By using an ensemble modelling approach, we estimated the geographical areas that are likely to be the most impacted by REINS spreading under climate change. Our results demonstrated the importance of functional traits related to reproduction for determining high invasion potential. For most species, we found high contemporary ESI values in the South-eastern Mediterranean Sea and low to intermediate contemporary ESI values in the Adriatic Sea and Northwestern Mediterranean sector. Moreover, we highlighted a major potential future expansion of high ESI values, and thus REINS IP, towards the northern Mediterranean, especially in the northern Adriatic Sea. This potential future northward expansion highlights the risk associated with climate-induced impacts on ecosystem conservation and fish stock management throughout the entire Mediterranean Sea.

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“…followed by "Transport-stowaway" (35%) (Katsanevakis et al, 2020). In the Baltic Sea, shipping and natural NIS spread from the North Sea dominate among the pathways for established NIS (Ojaveer et al, 2017).…”

Section: B a Figurementioning

confidence: 99%

Marine invasive alien species in Europe: 9 years after the IAS Regulation

Katsanevakis,

Olenin,

Puntila-Dodd

et al. 2023

Front. Mar. Sci.

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Biological invasions, resulting from human activities, exert substantial impacts on ecosystems worldwide. This review focuses on marine invasive alien species (IAS) in Europe, examining the current state, proposing strategies to address the problem, and offering recommendations for enhanced management. Effective management of biological invasions relies on accessible, accurate data to inform decision-making. Information systems such as the European Alien Species Information Network (EASIN), Aquatic Non-Indigenous and Cryptogenic Species (AquaNIS), and World Register of Introduced Marine Species (WriMS) provide comprehensive databases on IAS, but their sustainability requires long-term maintenance, continuous updates, and support. Most countries lack specific monitoring programs for marine IAS, and standardization and improvement of monitoring methods are needed. Port monitoring plays a vital role in the early detection of new arrivals, and recent advancements in molecular techniques show promise for effective IAS monitoring. Risk screening tools are commonly employed to rank taxa based on their invasiveness potential in European regions, but variations in protocols can yield inconsistent results. European impact assessments highlight resource competition, novel habitat creation, and predation as primary mechanisms for negative impacts on biodiversity, while the creation of novel habitats represents a key mechanism for positive impacts. Preventing IAS introductions is critical, and measures such as ballast water treatment systems are implemented to reduce the likelihood of marine introductions. However, understanding introduction pathways remains uncertain for many IAS. Eradication and control efforts for marine IAS have limited success, emphasizing the need for enhanced biosecurity measures. Climate change, especially ocean warming, can intensify IAS impacts on native species and ecosystems. In climate change hotspots, some tropical aliens may, however, compensate for the loss of thermally sensitive natives with similar traits. Therefore, it is imperative to consider the interactions between climate change and IAS in developing effective management and conservation strategies. Enhancing IAS management in Europe entails i) securing adequate funding, ii) expanding the list of IAS of Union Concern to adequately cover marine invasions, iii) learning from countries with successful biosecurity practices, iv) sustaining information systems, v) improving monitoring and early warning systems with innovative technologies, vi) enhancing prediction models, vii) conducting integrated impact assessments and mapping cumulative IAS impacts, and vii) considering the potential benefits of IAS in ecosystem functioning and services.

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Biological Invasions in the Aegean Sea: Temporal Trends, Pathways, and Impacts

Cited by 19 publications

References 84 publications

Are Mediterranean marine threatened species at high risk by climate change?

Are Mediterranean marine threatened species at high risk by climate change?

Improving predictions of invasive fish ranges combining functional and ecological traits with environmental suitability under climate change scenarios

Marine invasive alien species in Europe: 9 years after the IAS Regulation

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