Non-indigenous seaweeds in the Northeast Atlantic Ocean, the Mediterranean Sea and Macaronesia: a critical synthesis of diversity, spatial and temporal patterns - Université de Bretagne Occidentale Access content directly
Journal Articles European Journal of Phycology Year : 2023

Non-indigenous seaweeds in the Northeast Atlantic Ocean, the Mediterranean Sea and Macaronesia: a critical synthesis of diversity, spatial and temporal patterns

Luna van der Loos
Quinten Bafort
Samuel Bosch
Enric Ballesteros
Ignacio Bárbara
Estibaliz Berecibar
  • Function : Author
Aurélie Blanfuné
Kenny Bogaert
Silke Bouckenooghe
Juliet Brodie
Ester Cecere
Pilar Díaz-Tapia
Aschwin Engelen
Karl Gunnarson
Soha Hamdy Shabaka
Razy Hoffman
Vivian Husa
Álvaro Israel
  • Function : Author
Mart Karremans
  • Function : Author
Jessica Knoop
Christine Maggs
Manuela Parente
Frank Perk
  • Function : Author
Antonella Petrocelli
Conxi Rodríguez-Prieto
Sandrine Ruitton
Marta Sansón
Ester Serrão
Adriano Sfriso
Kjersti Sjøtun
Ergün Taşkin
Thierry Thibaut
Konstantinos Tsiamis
Lotte van de Weghe
Marc Verlaque
Sofie Vranken
Frederik Leliaert
Olivier de Clerck

Abstract

Effective monitoring of non-indigenous seaweeds and combatting their effects relies on a solid confirmation of the non-indigenous status of the respective species. We critically analysed the status of presumed non-indigenous seaweed species reported from the Mediterranean Sea, the Northeast Atlantic Ocean and Macaronesia, resulting in a list of 140 species whose non-indigenous nature is undisputed. For an additional 87 species it is unclear if they are native or non-indigenous (cryptogenic species) or their identity requires confirmation (data deficient species). We discuss the factors underlying both taxonomic and biogeographic uncertainties and outline recommendations to reduce uncertainty about the non-indigenous status of seaweeds. Our dataset consisted of over 19,000 distribution records, half of which can be attributed to only five species (Sargassum muticum, Bonnemaisonia hamifera, Asparagopsis armata, Caulerpa cylindracea and Colpomenia peregrina), while 56 species (40%) are recorded no more than once or twice. In addition, our analyses revealed considerable variation in the diversity of non-indigenous species between the geographic regions. The Eastern Mediterranean Sea is home to the largest fraction of non-indigenous seaweed species, the majority of which have a Red Sea or Indo-Pacific origin and have entered the Mediterranean Sea mostly via the Suez Canal. Non-indigenous seaweeds with native ranges situated in the Northwest Pacific make up a large fraction of the total in the Western Mediterranean Sea, Lusitania and Northern Europe, followed by non-indigenous species with a presumed Australasian origin. Uncertainty remains, however, regarding the native range of a substantial fraction of non-indigenous seaweeds in the study area. In so far as analyses of first detections can serve as a proxy for the introduction rate of non-indigenous seaweeds, these do not reveal a decrease in the introduction rate, indicating that the current measures and policies are insufficient to battle the introduction and spread of non-indigenous species in the study area.
Fichier principal
Vignette du fichier
107351.pdf (3.55 Mo) Télécharger le fichier
Origin Files produced by the author(s)

Dates and versions

hal-04373042 , version 1 (04-04-2024)

Identifiers

Cite

Luna van der Loos, Quinten Bafort, Samuel Bosch, Enric Ballesteros, Ignacio Bárbara, et al.. Non-indigenous seaweeds in the Northeast Atlantic Ocean, the Mediterranean Sea and Macaronesia: a critical synthesis of diversity, spatial and temporal patterns. European Journal of Phycology, 2023, pp.1-30. ⟨10.1080/09670262.2023.2256828⟩. ⟨hal-04373042⟩
91 View
8 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More