Non-indigenous and cryptogenic marine species in the Port of Algiers (Western Mediterranean)

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Published: Jun 12, 2025
DOI: https://doi.org/10.12681/mms.39689
Keywords:
Non-indigenous species Cryptogenic species Fouling species Algerian coast Port
BILEL BENSARI
Biological Oceanography and Marine Environment Laboratory, Faculty of Biological Science, University of Science and Technology, Houari Boumediene. B.P 32 El Alia 16111 Bab Ezzouar, Algeria
LAMIA BAHBAH
Biological Oceanography and Marine Environment Laboratory, Faculty of Biological Science, University of Science and Technology, Houari Boumediene. B.P 32 El Alia 16111 Bab Ezzouar, Algeria & National Higher School of Marine Sciences and Coastal Management, 16320 Algiers, Algeria
ADEL KACIMI
Marine and Coastal Ecosystems Laboratory (ECOSYSMarL), Department of Marine and Coastal Environment, National Higher School of Marine Sciences and Coastal Management, 16320 Algiers, Algeria
RYM BACHETARZI
Biological Oceanography and Marine Environment Laboratory, Faculty of Biological Science, University of Science and Technology, Houari Boumediene. B.P 32 El Alia 16111 Bab Ezzouar, Algeria
NOUR EL ISLAM BACHARI
Biological Oceanography and Marine Environment Laboratory, Faculty of Biological Science, University of Science and Technology, Houari Boumediene. B.P 32 El Alia 16111 Bab Ezzouar, Algeria
Abstract

This study addresses the growing concern of non-indigenous and cryptogenic marine species in the Mediterranean Sea, particularly in high-risk zones such as ports. The Port of Algiers, a significant maritime hub in Algeria, was selected as the study site to document the presence of such species due to its susceptibility to introductions through vessel traffic. Sampling was conducted from 2021 to 2024 across various submerged structures, including mooring buoys and ship fenders. Specimens were collected by scraping surfaces and preserved for identification, which was performed to the lowest taxonomic level possible. The results revealed 18 distinct species, of which 13 were non-indigenous and five cryptogenic. Notably, 11 of these species are recorded for the first time on the Algerian coast. Taxonomically, the species included Ascidiacea (six species), Bryozoa (five species), Crustacea (three species), Polychaeta (three species), and Porifera (one species). This research contributes to the baseline knowledge of non-indigenous and cryptogenic species in Algerian marine environments, providing essential data to support further ecological and biogeographic studies on species introductions in the Mediterranean Sea.

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  • Early View_vol. 26, n. 3, 2025

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Author Biography
LAMIA BAHBAH, Biological Oceanography and Marine Environment Laboratory, Faculty of Biological Science, University of Science and Technology, Houari Boumediene. B.P 32 El Alia 16111 Bab Ezzouar, Algeria & National Higher School of Marine Sciences and Coastal Management, 16320 Algiers, Algeria

This study addresses the growing concern of non-indigenous and cryptogenic marine species in the Mediterranean Sea, particularly in high-risk zones such as ports. The Port of Algiers, a significant maritime hub in Algeria, was selected as the study site to document the presence of such species due to its susceptibility to introductions through vessel traffic. Sampling was conducted from 2021 to 2024 across various submerged structures, including mooring buoys and ship fenders. Specimens were collected by scraping surfaces and preserved for identification, which was performed to the lowest taxonomic level possible. The results revealed 18 distinct species, of which 13 were non-indigenous and five cryptogenic. Notably, 11 of these species are recorded for the first time on the Algerian coast. Taxonomically, the species included Ascidiacea (six species), Bryozoa (five species), Crustacea (three species), Polychaeta (three species), and Porifera (one species). This research contributes to the baseline knowledge of non-indigenous and cryptogenic species in Algerian marine environments, providing essential data to support further ecological and biogeographic studies on species introductions in the Mediterranean Sea.

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