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Distribution of the seagrass Halophila stipulacea: A big jump to the northwestern Mediterranean Sea

Abstract : The Red Sea and Indian Ocean seagrass Halophila stipulacea entered the Mediterranean in the late 19th century via the Suez Canal. Here, we report on the discovery of a population of H. stipulacea covering 16.5 ha off the harbour of Cannes, French Riviera, France. This represents the northernmost locality of the species and a jump of 350 km to the north from its closest western Mediterranean locality (Razza di Juncu in Sardinia). At Cannes, it was found dwelling between 11 and 17 m depth on a dead matte of Posidonia oceanica. The species has most probably been introduced through mega-yacht or cruise ship anchoring since the Bay of Cannes is among the most highly-frequented places for luxury yachting and tourism. The lack of effective regulation to prevent the introduction of non-indigenous species in France and Europe is highlighted.
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https://hal.archives-ouvertes.fr/hal-03474601
Contributor : Aurélie Blanfuné Connect in order to contact the contributor
Submitted on : Monday, December 13, 2021 - 11:04:01 AM
Last modification on : Friday, February 11, 2022 - 2:38:01 PM
Long-term archiving on: : Monday, March 14, 2022 - 6:15:37 PM

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Thierry Thibaut, Aurelie Blanfuné, Charles Boudouresque, F Holon, N Agel, et al.. Distribution of the seagrass Halophila stipulacea: A big jump to the northwestern Mediterranean Sea. Aquatic Botany, Elsevier, 2022, 176, pp.103465. ⟨10.1016/j.aquabot.2021.103465⟩. ⟨hal-03474601⟩

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