Article
Limnology
Hannah E. Blossom, Per Juel Hansen
Summary: The study on Alexandrium pseudogonyaulax demonstrates that mixotrophy is more beneficial than lytic toxicity and mucus trap production. Despite a strain losing its mixotrophic ability, it exhibited higher lytic toxicity, yet was unable to outcompete faster growing competitors.
LIMNOLOGY AND OCEANOGRAPHY
(2021)
Article
Marine & Freshwater Biology
Vanessa Virginia Barbosa, Ranielle Daiana dos Santos Silva, Juliana dos Santos Severiano, Mathias Ahii Chia, Jose Etham de Lucena Barbosa
Summary: Investigations on the influence of green microalgae associated with cyanobacteria exposure to macrophytes and the production of cyanotoxins have not been previously explored. The effects of the presence of live plants and extracts of the Egeria densa, on the growth and saxitoxin production of Raphidiopsis raciborskii were investigated in the presence and absence of Chlorella vulgaris. The physical presence of the macrophyte reduced the biovolume of the cyanobacterium and its production of saxitoxins, while cultures exposed to aqueous extract had elevated saxitoxin levels. The green microalgae also increased the amount of cyanotoxins, especially when the macrophyte biomass was low. These findings suggest that E. densa can inhibit the growth of R. raciborskii and the production of cyanotoxins and that the presence of C. vulgaris can alter these processes.
Article
Marine & Freshwater Biology
Marc Long, Alexandra Peltekis, Carmen Gonzalez-Fernandez, Helene Hegaret, Benjamin Bailleul
Summary: Allelopathy is an efficient strategy used by some microalgae to outcompete other species, where allelochemicals from toxic dinoflagellates have deleterious effects on diatoms, giving a competitive advantage to the dinoflagellates. The study found that these unknown chemicals induced depolarization of diatom cytoplasmic membranes and impaired photosynthesis through inhibition of electron transfer, but the exact mechanisms and molecular targets remain unknown. Further research is needed to clarify the relationship between cytoplasmic membranes and inhibition of photosynthetic electron transfer.
Article
Biochemistry & Molecular Biology
Jacqueline Jerney, Karin Rengefors, Satoshi Nagai, Bernd Krock, Conny Sjoqvist, Sanna Suikkanen, Anke Kremp
Summary: This study on the toxic dinoflagellate Alexandrium ostenfeldii found that the benthic seed bank and pelagic population were equally diverse, and the pelagic population remained temporally homogeneous despite seasonal fluctuation. Frequent sexual reproduction and benthic-pelagic coupling help maintain high clonal diversity in both habitats, preventing dominance of single clonal lineages and seasonal population differentiation.
Article
Biodiversity Conservation
Xuexia Zhu, Zeshuang Wang, Qiming Zhou, Yunfei Sun, Lu Zhang, Jun Wang, Zhou Yang, Yuan Huang
Summary: Predation and competition are the primary interspecies interactions in aquatic ecosystem, and understanding how these two stressors interactively affect organisms is critical to predict food web dynamics. This study revealed that both predation risk from zooplankton and allelopathy from different macrophytes induced multi-celled colony formation in the green alga Scenedesmus obliquus, with Daphnia cues having a stronger effect. The four macrophytes did not impact algal growth rate, but they did alter the morphological defense in algae in a species-specific manner.
ECOLOGICAL INDICATORS
(2021)
Article
Food Science & Technology
Marc Long, Bernd Krock, Justine Castrec, Urban Tillmann
Summary: Various species of Alexandrium can produce bioactive compounds, including uncharacterized bioactive extracellular compounds (BECs) which may have significant ecological impacts. Due to a lack of information on BECs in experimental strains, contrasting results in literature make it impossible to distinguish between the effects of PSTs and BECs. Further research is needed to identify the nature of Alexandrium BECs and understand their potential ecological importance and collateral damage to marine organisms.
Article
Ecology
Joseph A. Tonin, Bryanna Sherbo, Scott N. Higgins, Sherry L. Schiff, Michael J. Paterson
Summary: Concentrations of dissolved organic carbon (DOC) are increasing in lakes worldwide, which has significant effects on zooplankton. Deep chlorophyll maxima (DCMs) occur in lakes with lower DOC concentrations and provide an important resource for zooplankton. The increase in DOC can suppress zooplankton by affecting both resource quality and the availability of metalimnetic phytoplankton resources.
FRESHWATER BIOLOGY
(2022)
Review
Environmental Sciences
Sylwia Sliwinska-Wilczewska, Kinga Wisniewska, Zofia Konarzewska, Agata Cieszynska, Aldo Barreiro Felpeto, Anita U. Lewandowska, Adam Latala
Summary: Allelopathy, the phenomenon of one plant species affecting the growth of another, is common in marine, brackish, and freshwater habitats. It can provide a competitive advantage for some phytoplankton species and may influence species succession and bloom development. Understanding the interactions of allelopathy with other factors is crucial for future research in this field.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Automation & Control Systems
Yu Mu, Wing-Cheong Lo
Summary: This study investigates the delayed toxic effects of chemicals on species' growth in a competitive system. Theoretical analysis and numerical simulations reveal the influence of delayed toxic factors on the oscillation of species' concentration and the stability of equilibria.
JOURNAL OF THE FRANKLIN INSTITUTE-ENGINEERING AND APPLIED MATHEMATICS
(2022)
Article
Environmental Sciences
Suhyung Cho, Sang-Hyeok Cho, So-Ra Ko, Yujin Jeong, Eunju Lee, Sangrak Jin, Bo-Seong Jeong, Byung-Ha Oh, Hee-Mock Oh, Chi-Yong Ahn, Byung-Kwan Cho
Summary: The marine bacterium Pseudoruegeria sp. M32A2M exhibits algicidal activity against Alexandrium catenella, affecting its photosystem and related metabolic pathways while enhancing its own metabolic activities. During co-culture, the secondary metabolite-synthesizing clusters of Pseudoruegeria are upregulated, potentially contributing to its algicidal activity.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
Lavenia Ratnarajah, Stephane Blain, Philip W. Boyd, Marion Fourquez, Ingrid Obernosterer, Alessandro Tagliabue
Summary: The study examined competition for iron between phytoplankton and bacteria in the iron-limited Southern Ocean. Results show that increased iron and light favor phytoplankton dominance, while increased LDOC and decreased light favor bacterial dominance. Bacteria can outcompete phytoplankton for iron under elevated LDOC conditions.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Environmental Sciences
So-Ra Ko, Yujin Jeong, Sang-Hyeok Cho, Eunju Lee, Bo-Seong Jeong, Seung Ho Baek, Byung-Ha Oh, Chi-Yong Ahn, Hee-Mock Oh, Byung-Kwan Cho, Suhyung Cho
Summary: In this study, a novel compound secreted by a marine bacterium was found to have algicidal activity against a specific marine phytoplankton species, suggesting its potential as a photosynthesis inhibitor.
Article
Biotechnology & Applied Microbiology
Zhaoyang Chai, Zhangxi Hu, Yunyan Deng, Yufeng Yang, Ying Zhong Tang
Summary: The study demonstrates that the seaweed Gracilaria lemaneiformis can inhibit the growth of harmful algal blooms-forming dinoflagellate Akashiwo sanguinea, but the dead cells of A. sanguinea promote bacterial growth, consequently slowing the growth of G. lemaneiformis in a feedback loop.
JOURNAL OF APPLIED PHYCOLOGY
(2021)
Article
Ecology
Andrea Buresova, Vaclav Tejnecky, Jan Kopecky, Ondrej Drabek, Pavla Madrova, Nada Rerichova, Marek Omelka, Petra Krizova, Karel Nemecek, Thomas B. Parr, Tsutomu Ohno, Marketa Sagova-Mareckova
Summary: The study compared the soil forming processes and microbial community structures under beech and spruce forests, finding higher litter decomposition rates in beech forests and lower rates in spruce forests.
EUROPEAN JOURNAL OF SOIL BIOLOGY
(2021)
Review
Marine & Freshwater Biology
Judit Padisak, Luigi Naselli-Flores
Summary: The article explores the characteristics of species living in extreme environments and their impact on phytoplankton communities. In extreme environments, specific species adapted to the conditions are selected, leading to a dominance of one species in the phytoplankton community, while under less extreme conditions, a relatively stable equilibrium can be maintained.
Article
Engineering, Environmental
Agneta Andersson, H. E. Markus Meier, Matyas Ripszam, Owen Rowe, Johan Wikner, Peter Haglund, Kari Eilola, Catherine Legrand, Daniela Figueroa, Joanna Paczkowska, Elin Lindehoff, Mats Tysklind, Ragnar Elmgren
Article
Ecology
D. Figueroa, O. F. Rowe, J. Paczkowska, C. Legrand, A. Andersson
Article
Ecology
Anna Godhe, Conny Sjoqvist, Sirje Sildever, Josefin Sefbom, Sara Hardardottir, Mireia Bertos-Fortis, Carina Bunse, Susanna Gross, Emma Johansson, Per R. Jonsson, Saghar Khandan, Catherine Legrand, Inga Lips, Nina Lundholm, Karin E. Rengefors, Ingrid Sassenhagen, Sanna Suikkanen, Lisa Sundqvist, Anke Kremp
JOURNAL OF BIOGEOGRAPHY
(2016)
Article
Marine & Freshwater Biology
J. Paczkowska, Of Rowe, L. Schluster, C. Legrand, B. Karlson, A. Andersson
JOURNAL OF PLANKTON RESEARCH
(2017)
Article
Chemistry, Medicinal
Hanna Mazur-Marzec, Mireia Bertos-Fortis, Anna Torunska-Sitarz, Anna Fidor, Catherine Legrand
Article
Microbiology
Carina Bunse, Mireia Bertos-Fortis, Ingrid Sassenhagen, Sirje Sildever, Conny Sjoqvist, Anna Godhe, Susanna Gross, Anke Kremp, Inga Lips, Nina Lundholm, Karin Rengefors, Josefin Sefbom, Jarone Pinhassi, Catherine Legrand
FRONTIERS IN MICROBIOLOGY
(2016)
Article
Microbiology
Mireia Bertos-Fortis, Hanna M. Farnelid, Markus V. Lindh, Michele Casini, Agneta Andersson, Jarone Pinhassi, Catherine Legrand
FRONTIERS IN MICROBIOLOGY
(2016)
Editorial Material
Microbiology
Corina P. D. Brussaard, Kay D. Bidle, Carlos Pedros-Alio, Catherine Legrand
NATURE MICROBIOLOGY
(2017)
Article
Microbiology
Markus V. Lindh, Johanna Sjostedt, Borje Ekstam, Michele Casini, Daniel Lundin, Luisa W. Hugerth, Yue O. O. Hu, Anders F. Andersson, Agneta Andersson, Catherine Legrand, Jarone Pinhassi
ENVIRONMENTAL MICROBIOLOGY
(2017)
Article
Marine & Freshwater Biology
A. Andersson, S. Brugel, J. Paczkowska, O. F. Rowe, D. Figueroa, S. Kratzer, C. Legrand
ESTUARINE COASTAL AND SHELF SCIENCE
(2018)
Article
Marine & Freshwater Biology
Emil Fridolfsson, Elin Lindehoff, Catherine Legrand, Samuel Hylander
JOURNAL OF PLANKTON RESEARCH
(2020)
Article
Engineering, Environmental
Quyen Nham, Lina Mattsson, Catherine Legrand, Elin Lindehoff
Summary: Microalgal cultivation for biodiesel and feed can use whey permeate as a sustainable source of nutrients. Green algae strains and polyculture showed an ability to use organic phosphorus from whey permeate and had similar or higher growth rates and nutrient removal rates compared to chemical phosphate treatments. This study demonstrated that raw whey permeate can replace mineral phosphorus fertilizer for algal cultivation.
WATER ENVIRONMENT RESEARCH
(2023)
Article
Computer Science, Interdisciplinary Applications
Lina Mattsson, Elin Lindehoff, Martin Olofsson, Catherine Legrand
ENGINEERING REPORTS
(2019)
Article
Ecology
Federico Baltar, Catherine Legrand, Jarone Pinhassi
Meeting Abstract
Plant Sciences
E. Lindehoff, J. Jerney, A. Le Tortorec, C. Legrand, H. Savela, E. Svahn, S. Suikkanen, A. Kremp