Repeated rapid assessment surveys reveal contrasting trends in occupancy of marinas by non-indigenous species on opposite sides of the western English Channel

This paper provides a current view of the bryozoan biodiversity of the Mediterranean Sea updating the checklist by Rosso (2003). Bryozoans presently living in the Mediterranean increase to 556 species, 212 genera and 93 families. Cheilostomes largely prevail (424 species, 159 genera and 64 families) followed by cyclostomes (75 species, 26 genera and 11 families) and ctenostomes (57 species, 27 genera and 18 families). Few families and genera make the bulk of this biodiversity whereas one third of families are monospecific. The number of species-rank taxa has increased by 81 in the last dozen years but most of these additions relate to the revision of material from old collections and to the introduction of non-indigenous species. Most of the bryozoan diversity is distributed in the coralligenous and dark and semi-dark cave biocoenoses followed by detritic bottoms. Diversity lowers in shallow-water vegetated bottoms and in bathyal habitats. Further increase in diversity is expected from investigation of still poorly known areas and habitats and the need for rapid assessment is remarked on in view of the management of Mediterranean habitats through the EU Marine Strategy Directive.

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Meta-analysis on the ecological impacts of widely spread non-indigenous species in the Baltic Sea

The Science of The Total Environment ◽

10.1016/j.scitotenv.2021.147375 ◽

2021 ◽

pp. 147375

Author(s):

Henn Ojaveer ◽

Jonne Kotta ◽

Okko Outinen ◽

Heli Einberg ◽

Anastasija Zaiko ◽

...

Keyword(s):

Baltic Sea ◽

Meta Analysis ◽

Ecological Impacts ◽

Indigenous Species ◽

The Baltic Sea ◽

The Baltic ◽

Non Indigenous Species

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Ecological status assessment and non-indigenous species in industrial and fishing harbours of the Gulf of Gabès (central Mediterranean Sea)

Environmental Science and Pollution Research ◽

10.1007/s11356-021-14729-1 ◽

2021 ◽

Author(s):

Nawfel Mosbahi ◽

Jean-Philippe Pezy ◽

Lassad Neifar ◽

Jean-Claude Dauvin

Keyword(s):

Mediterranean Sea ◽

Ecological Status ◽

Indigenous Species ◽

Central Mediterranean ◽

Gulf Of Gabes ◽

Gulf Of Gabès ◽

Central Mediterranean Sea ◽

Ecological Status Assessment ◽

Status Assessment ◽

Non Indigenous Species

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First Record of the Alien Species Procambarus virginalis Lyko, 2017 in Fresh Waters of Sardinia and Insight into Its Genetic Variability

Life ◽

10.3390/life11070606 ◽

2021 ◽

Vol 11 (7) ◽

pp. 606

Author(s):

Daria Sanna ◽

Ilenia Azzena ◽

Fabio Scarpa ◽

Piero Cossu ◽

Angela Pira ◽

...

Keyword(s):

Genetic Variability ◽

Alien Species ◽

Procambarus Clarkii ◽

Mitochondrial Gene ◽

First Record ◽

Indigenous Species ◽

Fresh Waters ◽

Mediterranean Island ◽

Marbled Crayfish ◽

Non Indigenous Species

In the fresh waters of Sardinia (Italy), the non-indigenous crayfish species Procambarus clarkii has been reported from 2005, but, starting from 2019, there have been several reports of a new non-indigenous crayfish in southern and central areas of this Mediterranean island, and its morphology suggests that this species may be the marbled crayfish Procambarus virginalis. Forty-seven individuals of this putative species were analyzed, using the mitochondrial gene Cytochrome c Oxidase subunit I as molecular marker to identify this crayfish and investigate the level of genetic variability within the recently established population. Phylogenetic and phylogeographic analyses were carried out on a dataset including sequences from the Sardinian individuals and from all congenerics available in GenBank. Results showed that the new Sardinian crayfish belong to the species P. virginalis. All the sequences belonging to P. virginalis from European countries are identical, with only few exceptions found among Sardinian individuals. In conclusion, this paper highlights the occurrence of a new further alien species in the Sardinian fresh waters, which are already characterized by the high presence of non-indigenous species.

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