Article
Biodiversity Conservation
Marco R. Hernandez, Justin R. Barker, Hugh J. Macisaac
Summary: This study models the risk differences in cargo vessel discharges that meet the IMO D-2 standards and analyzes the impact on invasion risk. The results indicate that community composition strongly affects the risk, and colonization pressure has a significant influence at low community propagule pressure. The IMO D-2 standards require very low individual propagule pressures and community propagule pressures, and more empirical research is needed to determine if vessels can meet these requirements.
DIVERSITY AND DISTRIBUTIONS
(2023)
Article
Environmental Sciences
Sondes Melliti Ben Garali, Ines Sahraoui, Hiba Ben Othman, Abdessalem Kouki, Pablo de la Iglesia, Jorge Diogene, Celine Lafabrie, Karl B. Andree, Margarita Fernandez-Tejedor, Kaouther Mejri, Marouan Meddeb, Olivier Pringault, Asma Sakka Hlaili
Summary: This study reveals that polycyclic aromatic hydrocarbons can impact the growth and physiology of potentially toxic diatoms, with P. mannii showing higher tolerance and faster growth compared to P. hasleana. Both species were also capable of bioconcentrating and degrading PAHs, with P. mannii harboring more efficient hydrocarbon-degrading bacteria.Further research should explore the bacterial community associated with Pseudo-nitzschia species for a better understanding of their responses to pollutants and other environmental stressors.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2021)
Article
Genetics & Heredity
Ziyan He, Yang Chen, Zongmei Cui, Mengjia Zhang, Yongfang Zhao, Feng Liu, Nansheng Chen
Summary: Pseudo-nitzschia is an important genus of diatoms capable of inducing harmful algae blooms and producing toxins. This study revealed the complete mitochondrial genome of P. delicatissima for the first time, which contains a group II intron in the cox1 gene.
MITOCHONDRIAL DNA PART B-RESOURCES
(2021)
Article
Microbiology
Timotej Turk Dermastia, Ivano Vascotto, Janja France, David Stankovic, Patricija Mozetic
Summary: Diatoms are important phytoplankton in the oceans, contributing up to 40% of photosynthetic activity and playing a vital role in carbon and silicon cycles. Traditional microscopy methods for assessing diatom diversity are unreliable, but next-generation sequencing using rbcL marker can provide more accurate results. Through comparing microscopy, 18S-V9 metabarcoding, and rbcL metabarcoding, we identified new genera and species in the Gulf of Trieste and highlighted the limitations of microscopy and reference databases.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Ecology
Sarah C. Donelan, A. Whitman Miller, Jim R. Muirhead, Gregory M. Ruiz
Summary: The introduction of nonindigenous species poses a threat to global ecosystems, and the variability in reproductive responses across species and transit routes is an important driver of species invasions. Integrating reproductive potential into management strategies is crucial for limiting the spread of nonindigenous species.
FRONTIERS IN ECOLOGY AND THE ENVIRONMENT
(2022)
Article
Marine & Freshwater Biology
Ryan M. McCabe, Barbara M. Hickey, Vera L. Trainer
Summary: This article discusses a bulletin that communicates the risk of toxic Pseudo-nitzschia blooms to shellfish harvest in the Pacific Northwest region of the United States. The bulletin provides information and alerts to shellfish managers about adverse environmental conditions that could lead to toxic blooms. It complements beach phytoplankton monitoring programs and offers additional forewarning about potential toxin outbreaks.
Article
Environmental Sciences
Alexandre Castagna, Heidi Dierssen, Emanuele Organelli, Margarita Bogorad, Jonas Mortelmans, Wim Vyverman, Koen Sabbe
Summary: Recent research has found that previous interpretations of the optical signals from Phaeocystis globosa were incorrect, and that previous methods are not specific to this species, even within the phytoplankton assemblage of the southern North Sea. Additionally, the optical and pigment signatures of Phaeocystis species are part of a broad pigmentation trend across unrelated taxonomic groups, highlighting the importance of understanding chlorophyll c(3) presence for the interpretation of pigment and optical data.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Engineering, Marine
Jasna Arapov, Tina Tomasevic, Tina Bonacic, Mia Pejkovic, Mia Buzancic, Ivana Buselic, Ivana Lepen Pleic, Silvia Casabianca, Antonella Penna, Sanda Skejic, Zivana Nincevic Gladan
Summary: This study examined the composition of Pseudo-nitzschia species in four aquaculture areas using both morphological and molecular analyses. The results confirmed the presence of four species, namely Pseudo-nitzschia brasiliana, Pseudo-nitzschia hasleana, Pseudo-nitzschia galaxiae, and Pseudo-nitzschia linea. P. galaxiae was the most frequently occurring species, P. linea was found in all investigated areas, while P. hasleana and P. brasiliana were rare and mainly distributed in Kastela Bay. Interestingly, the findings of P. brasiliana and P. hasleana represent the first confirmation for the Adriatic Sea, and P. galaxiae and P. linea have not been previously reported along the eastern Adriatic coast.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Fisheries
Francesco Cipolletta, Ademy Russo, Domenico D'Alelio, Francesca Margiotta, Diana Sarno, Adriana Zingone, Marina Montresor
Summary: This study investigated the vertical distribution of Pseudo-nitzschia species in the Gulf of Naples and found that they are primarily abundant in surface waters. The species showed different adaptations to environmental factors. Additionally, the study revealed that Pseudo-nitzschia species are present at low concentrations throughout the year, suggesting the presence of rare overwintering cells that serve as bloom inocula.
MEDITERRANEAN MARINE SCIENCE
(2022)
Article
Marine & Freshwater Biology
Marco Sandoval-Belmar, Jayme Smith, Allison R. Moreno, Clarissa Anderson, Raphael M. Kudela, Martha Sutula, Faycal Kessouri, David A. Caron, Francisco P. Chavez, Daniele Bianchi
Summary: Pseudo-nitzschia species that produce the neurotoxin domoic acid are the main cause of harmful algal blooms (HABs) along the U.S. West Coast, with significant impacts on ecosystems, fisheries, and human health. A 20-year time series of in situ particulate DA and environmental observations was analyzed to characterize the drivers of PN HABs along the California coast. The study found that DA outbreaks are strongly correlated with upwelling, chlorophyll-a, and silicic acid limitation, and there are clear differences in the response to climate regimes across different regions.
Article
Plant Sciences
Valeria Sabatino, Ida Orefice, Pina Marotta, Luca Ambrosino, Maria Luisa Chiusano, Giuliana d'Ippolito, Giovanna Romano, Angelo Fontana, Maria Immacolata Ferrante
Summary: The study identified and characterized a LOX gene, PaLOX, in the marine diatom Pseudo-nitzschia arenysensis, showing that RNA interference of PaLOX resulted in decreased lipid-peroxidizing activity and oxylipin synthesis, as well as reduced growth of the diatom. The presence of a single LOX gene in the genome suggests PaLOX encodes for a 12/15S-LOX with dual specificity, providing additional support to the correlation between cell growth and oxylipin biosynthesis in diatoms.
Article
Marine & Freshwater Biology
Hally B. Stone, Neil S. Banas, Parker MacCready, Vera L. Trainer, Daniel L. Ayres, Matthew Hunter
Summary: The Pacific Northwest HAB Bulletin project utilizes a combination of monitoring data and ocean forecast modeling to study the formation, evolution, and transport of harmful algal blooms in the region. This study aimed to improve the forecast model used in the Bulletin through a retrospective particle-tracking experiment. The analysis identified the most useful beaching definition and cell count threshold for describing harmful algal bloom events. Additionally, the performance of different model resolutions was compared, with the high-resolution model showing better accuracy in beaching definition.
Article
Marine & Freshwater Biology
Aude Boivin-Rioux, Michel Starr, Joel Chasse, Michael Scarratt, William Perrie, Zhenxia Long, Diane Lavoie
Summary: Harmful algal blooms pose a threat to human health, local economies, and coastal ecosystems. The use of GAMMs and climate simulations predicts an increase in blooms of Dinophysis acuminata and Dinophysis norvegica, while blooms of Pseudo-nitzschia seriata are predicted to stabilize or decrease in the future on the Canadian East Coast.
Article
Environmental Sciences
Raquel Rios-Castro, Beatriz Novoa, Jorge Hernandez-Urcera, Francisco Rodriguez, Antonio Figueras
Summary: In this study, eDNA amplicon sequencing was used to detect harmful algal species in a shallow marine environment. The results showed the presence of 25 potential harmful species, including diatoms and dinoflagellates. The study also highlighted the importance of including both sediment and plankton fractions in eDNA monitoring studies.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Marine & Freshwater Biology
M. J. Lima, P. Relvas, A. B. Barbosa
Summary: This study aimed to evaluate the spatial-temporal variability patterns and phenology of key toxigenic phytoplankton species in southern Portugal and identify the environmental drivers and predictors. The study found several environmental factors that influence harmful algal blooms and made suggestions for improving prediction models.