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Influence of environmental factors on biodiversity, abundance and the distribution pattern of dinoflagellates and ciliates during spring and summer in coastal waters of Algeria (southwestern Mediterranean Sea)

Published online by Cambridge University Press:  18 July 2023

Redha Sidi Ali Open the ORCID record for Redha Sidi Ali [Opens in a new window] ,
Ghollame Ellah Yacine Khames Open the ORCID record for Ghollame Ellah Yacine Khames [Opens in a new window] ,
Zakia Alioua Open the ORCID record for Zakia Alioua [Opens in a new window]  and
Rabea Seridji Open the ORCID record for Rabea Seridji [Opens in a new window]
Redha Sidi Ali*
Affiliation:
Pelagic-ecosystem Laboratory, Faculty of Biological Sciences, University of Sciences and Technology Houari Boumediene (USTHB), BP. 32, El-Alia Bab-Ezzouar 16111, Algiers, Algeria
Ghollame Ellah Yacine Khames
Affiliation:
Pelagic-ecosystem Laboratory, Faculty of Biological Sciences, University of Sciences and Technology Houari Boumediene (USTHB), BP. 32, El-Alia Bab-Ezzouar 16111, Algiers, Algeria
Zakia Alioua
Affiliation:
Fisheries Laboratory, Faculty of Biological Sciences, University of Sciences and Technology Houari Boumediene (USTHB), BP. 32, El-Alia Bab-Ezzouar 16111, Algiers, Algeria
Rabea Seridji
Affiliation:
Pelagic-ecosystem Laboratory, Faculty of Biological Sciences, University of Sciences and Technology Houari Boumediene (USTHB), BP. 32, El-Alia Bab-Ezzouar 16111, Algiers, Algeria
*
Corresponding author: Redha Sidi Ali; Email: redha221@gmail.com
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Abstract

The objective of this study was to assess the distribution patterns of dinoflagellates and ciliates communities during planktonic bloom and post-bloom development periods, in relation to environmental parameters. Their distribution was studied during spring and summer 2012, in coastal waters of Algeria at six sampling stations (four sampling layers). Overall, 116 species were identified, including 98 dinoflagellates. The species richness of microzooplankton was higher in summer (81 species: 67 dinoflagellates, seven tintinnids and seven ciliates) than in spring (76 species: 72 dinoflagellates, three naked ciliates and one tintinnid). Significant difference in total abundances was observed between spring (median = 145 ind l−1) and summer (median = 90 ind l−1) but no significance (P > 0.05, Mann–Whitney test) in Shannon–Wiener (H′spring: 3.31 bits ind−1; H′summer: 3.70 bits ind−1) and evenness (Espring: 0.77; Esummer: 0.84) indices. The ciliate average abundance was higher in summer (11.3 ind l−1) than in spring (1.95 ind l−1), whereas dinoflagellate average abundance was lower in summer (127.92 ind l−1) than spring (190.19 ind l−1). Non-metric multidimensional scaling was used to identify different sample assemblages. It showed that temperature and salinity influenced the distribution pattern in the canonical correspondence analysis followed by chlorophyll a, silicate and nitrate concentrations. Our framework provides insight regarding trait trade off with implications for feedbacks to ecosystems, aiming to bridge the gap of plankton community ecology in Algeria. It elaborates a taxonomic list of dinoflagellates and ciliates in the marine pelagic ecosystem and performs their ecological characterization in their environment.

Keywords

abundanceAlgerian coastciliatesdinoflagellatesdiversityHabibas IslandsMediterranean Sea
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 103 , 2023 , e54
Copyright
Copyright © The Author(s), 2023. Published by Cambridge University Press on behalf of Marine Biological Association of the United Kingdom

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