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New record of the alien seagrass Halophila stipulacea (Hydrocharitaceae) in the western Mediterranean: a further clue to changing Mediterranean Sea biogeography

  • Maria Cristina Gambi (a1), Fabio Barbieri (a2) and Carlo Nike Bianchi (a3)
Abstract

The occurrence of the tropical seagrass species Halophila stipulacea (Hydrocharitaceae) is reported within the harbour of Palinuro (Salerno, central Tyrrhenian Sea, Italy). The bottom covered by the seagrass has been evaluated in about 16 m2, fragmented in various small patches distributed in a narrow belt between 0.5 and 5 m depth, and all settled on dead matte of the endemic Mediterranean seagrass Posidonia oceanica. Mean density was 10,500 shoots m−2. This record documents a displacement of about 180 km north of the previously documented limit of Halophila stipulacea in the western Mediterranean, likely mediated by pleasure boat traffic and anchoring, and favoured by climate change. This record illustrates a further example of the changing Mediterranean Sea biogeography: north–south patterns in biotic ranges will probably replace the presently well established west–east patterns in the Mediterranean Sea of tomorrow.

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Corresponding author
Correspondence should be addressed to: M.C. Gambi, Laboratorio di Ecologia del Benthos – Stazione Zoologica, Anton Dohrn, Napoli, Italy email: gambimc@szn.it
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This list contains references from the content that can be linked to their source. For a full set of references and notes please see the PDF or HTML where available.

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Marine Biodiversity Records
  • ISSN: -
  • EISSN: 1755-2672
  • URL: /core/journals/marine-biodiversity-records
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