Vol.:(0123456789)
1 3
Environ Monit Assess
(2021) 193:333
https://doi.org/10.1007/s10661-021-09117-8
Dynamics of the genus Ostreopsis (Gonyaulacales,
Dinophyceae) in a Mediterranean fish farm
Ryhane Lounas · Hamza Kasmi · Safia Chernai ·
Nadia Amarni · Boualem Hamdi
Received: 26 October 2020 / Accepted: 2 May 2021
© The Author(s), under exclusive licence to Springer Nature Switzerland AG 2021
0.60 μmol L
−1
. Our results highlight the importance
of monitoring the proliferation of this harmful dinoflagellate in southern Mediterranean waters.
Keywords Algeria · Aquaculture · Harmful algae
bloom · Sparus aurata · Palytoxin
Introduction
Ostreopsis sp. is well known in the tropics as a potentially harmful tychoplanktonic dinoflagellate (Parsons
et al., 2012). In the recent decades, species of the genus
Ostreopsis are proliferating in temperate latitudes (Soliño
et al., 2020), including the Mediterranean Sea coasts,
where recurrent blooms have occurred in Lebanon (Açaf
et al., 2020), Tunisia (Ben Gharbia et al., 2019), Italy
(Accoroni et al., 2017), Spain (Casabianca et al., 2014),
Algeria (Illoul et al., 2012), and Monaco (Cohu et al.,
2011).
Abstract This study revealed the dynamics of the
genus Ostreopsis in the south-western Mediterranean Sea fish farm during the 2016 and 2017 summers. This phytoplankton is known to produce palytoxin-like compounds, listed among the most potent
marine toxins known, and can pose a serious concern
for humans in the Mediterranean area. Principal component analysis (PCA) explained the significance of
temperature, salinity, and dissolved inorganic nitrogen in the proliferation of this toxic dinoflagellate.
The peak of the Ostreopsis sp. (6.34 × 10
3
cells L
−1
)
was recorded at 28.4 °C, at a salinity of 38.3 PSU,
and the dissolved inorganic nitrogen had a value of
Highlights
• Ostreopsis sp. reported in sea bream fish farm.
• Positive correlation between Ostreopsis sp. proliferation,
and temperature, salinity, and dissolved inorganic nitrogen.
• Competition between Ostreopsis sp. proliferation, and
other microorganisms
R. Lounas (*) · S. Chernai · N. Amarni · B. Hamdi
Laboratory of Conservation and Valorization of Marine
Resources, National Higher School of Marine Science
and Coastal Management (ENSSMAL), University
Campus of Dely Ibrahim, Bois des Cars, 16320 Algiers,
Algeria
e-mail: louna.ryhane@gmail.com
S. Chernai
e-mail: shamdi.01sh@gmail.com
N. Amarni
e-mail: amarninadia@hotmail.com
B. Hamdi
e-mail: bhamdi_99@yahoo.fr
H. Kasmi
Sécurité de Convoyage de Fonds Et de Produits Sensibles
Et/Ou Dangereux, SGS Centre, Bois des cars III Villa n°96
Dely-Ibrahim, 16320 Algiers, Algeria
e-mail: ks.amza@yahoo.fr
1 3
Environ Monit Assess
(2021) 193:333
https://doi.org/10.1007/s10661-021-09117-8
Dynamics of the genus Ostreopsis (Gonyaulacales,
Dinophyceae) in a Mediterranean fish farm
Ryhane Lounas · Hamza Kasmi · Safia Chernai ·
Nadia Amarni · Boualem Hamdi
Received: 26 October 2020 / Accepted: 2 May 2021
© The Author(s), under exclusive licence to Springer Nature Switzerland AG 2021
0.60 μmol L
−1
. Our results highlight the importance
of monitoring the proliferation of this harmful dinoflagellate in southern Mediterranean waters.
Keywords Algeria · Aquaculture · Harmful algae
bloom · Sparus aurata · Palytoxin
Introduction
Ostreopsis sp. is well known in the tropics as a potentially harmful tychoplanktonic dinoflagellate (Parsons
et al., 2012). In the recent decades, species of the genus
Ostreopsis are proliferating in temperate latitudes (Soliño
et al., 2020), including the Mediterranean Sea coasts,
where recurrent blooms have occurred in Lebanon (Açaf
et al., 2020), Tunisia (Ben Gharbia et al., 2019), Italy
(Accoroni et al., 2017), Spain (Casabianca et al., 2014),
Algeria (Illoul et al., 2012), and Monaco (Cohu et al.,
2011).
Abstract This study revealed the dynamics of the
genus Ostreopsis in the south-western Mediterranean Sea fish farm during the 2016 and 2017 summers. This phytoplankton is known to produce palytoxin-like compounds, listed among the most potent
marine toxins known, and can pose a serious concern
for humans in the Mediterranean area. Principal component analysis (PCA) explained the significance of
temperature, salinity, and dissolved inorganic nitrogen in the proliferation of this toxic dinoflagellate.
The peak of the Ostreopsis sp. (6.34 × 10
3
cells L
−1
)
was recorded at 28.4 °C, at a salinity of 38.3 PSU,
and the dissolved inorganic nitrogen had a value of
Highlights
• Ostreopsis sp. reported in sea bream fish farm.
• Positive correlation between Ostreopsis sp. proliferation,
and temperature, salinity, and dissolved inorganic nitrogen.
• Competition between Ostreopsis sp. proliferation, and
other microorganisms
R. Lounas (*) · S. Chernai · N. Amarni · B. Hamdi
Laboratory of Conservation and Valorization of Marine
Resources, National Higher School of Marine Science
and Coastal Management (ENSSMAL), University
Campus of Dely Ibrahim, Bois des Cars, 16320 Algiers,
Algeria
e-mail: louna.ryhane@gmail.com
S. Chernai
e-mail: shamdi.01sh@gmail.com
N. Amarni
e-mail: amarninadia@hotmail.com
B. Hamdi
e-mail: bhamdi_99@yahoo.fr
H. Kasmi
Sécurité de Convoyage de Fonds Et de Produits Sensibles
Et/Ou Dangereux, SGS Centre, Bois des cars III Villa n°96
Dely-Ibrahim, 16320 Algiers, Algeria
e-mail: ks.amza@yahoo.fr