Review
Oceanography
Dong Yan, Jun Nishioka, Takenobu Toyota, Koji Suzuki
Summary: The Sea of Okhotsk plays a key role in the seawater circulation of the North Pacific Ocean. During winter, sea ice forms in the northern shelf and is transported to the southern part of the sea by the East Sakhalin Current. Diatoms are the dominant microalgae in the sea ice ecosystem, with Thalassiosira spp., Porosira glacialis, and Fragilariopsis cylindrus being the major species. The presence of the East Sakhalin Current influences the composition and abundance of microalgae in the seawater stations, with higher concentrations of dissolved Fe and ammonia. The study suggests that the winter phytoplanktonic communities in the southern Sea of Okhotsk are largely dependent on the presence of the East Sakhalin Current.
PROGRESS IN OCEANOGRAPHY
(2022)
Article
Microbiology
Stefan Thiele, Julia E. Storesund, Mar Fernandez-Mendez, Philipp Assmy, Lise Ovreas
Summary: The Arctic is warming at a rate 2-3 times faster than the global average, leading to changes in Arctic sea ice and impacting ice-associated ecosystems. Sea-ice algal blooms play a crucial role in driving the succession of bacterial and archaeal communities in Arctic sea ice.
Article
Microbiology
Huiyin Song, Yiqi Wang, Xiangxiang Ding, Nansheng Chen
Summary: A large-scale bloom event of P. globosa occurred offshore Qingdao in the winter of 2021, lasting for over one month. This event was notable because it was the first recorded P. globosa bloom in Qingdao and the temperature was much lower compared to previous blooms in China. The analysis revealed limited genetic compositions of P. globosa offshore Qingdao, with two dominant genotypes and other rare genotypes with low abundance.
Article
Marine & Freshwater Biology
Huiyin Song, Yang Chen, Kate Gibson, Shuya Liu, Zhiming Yu, Nansheng Chen
Summary: Accumulated evidence suggests that the haptophyte species Phaeocystis globosa, crucial for climate control and potentially causing harmful algal blooms, exhibits a rich genetic diversity. COX1 can effectively differentiate different P. globosa strains due to low intra-genome variations and high resolution. Analysis of 57 P. globosa strains and seven field samples revealed at least seven distinct genetic clades, demonstrating high genetic diversity in this species.
Article
Environmental Sciences
Haakon Hop, Anette Wold, Amelie Meyer, Allison Bailey, Maja Hatlebakk, Slawomir Kwasniewski, Peter Leopold, Piotr Kuklinski, Janne E. Soreide
Summary: The impact of the rapidly changing Arctic on zooplankton community structure and seasonal behavior is not yet understood. Zooplankton in the Arctic region is more dependent on surrounding water mass characteristics, such as salinity and depth, rather than geographical location. Seasonal changes in the community are closely linked to algal food availability and seasonal changes from winter to spring.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Environmental Sciences
Christine Dybwad, Philipp Assmy, Lasse M. Olsen, Ilka Peeken, Anna Nikolopoulos, Thomas Krumpen, Achim Randelhoff, Agnieszka Tatarek, Jozef M. Wiktor, Marit Reigstad
Summary: The study reveals clear seasonal patterns in the development and fate of phytoplankton blooms in the Arctic Ocean's seasonal sea ice zone, with low phytoplankton stocks and carbon fluxes in winter and pre-bloom periods, a short but intense productive season in May and June, and moderate carbon export fluxes in the autumn post-bloom conditions. The taxonomic composition of protist assemblages, large grazers, distance to open water, and Atlantic water advection play crucial roles in determining the fate of the blooms and the magnitude of organic carbon exported out of the surface water column. Intense blooms and high export events were observed in ice-covered waters, challenging previous assumptions about the productivity of the marginal ice zone in the area.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Marine & Freshwater Biology
Aini Hannani Naqiah Abdul Manaff, Kieng Soon Hii, Zhaohe Luo, Minlu Liu, Ing Kuo Law, Sing Tung Teng, Mohd Fadzil Akhir, Haifeng Gu, Chui Pin Leaw, Po Teen Lim
Summary: A large-scale sampling was conducted in the South China Sea to investigate the molecular diversity and distributions of microeukaryotic protists, focusing on potentially harmful microalgal (HAB) species along the east coast of Peninsular Malaysia. The study discovered various protistan molecular units, including previously unreported HAB taxa, and revealed interesting spatial distribution patterns. The molecular information obtained provides an updated HAB species inventory and a toolset for HAB monitoring and management decisions in the region.
Article
Environmental Sciences
B. R. Smitha, V. N. Sanjeevan, K. B. Padmakumar, Midhun Shah Hussain, T. C. Salini, J. K. Lix
Summary: Convective mixing, mesoscale eddies, and regenerated production contribute to above-average biological productivity in the North East Arabian Sea during the winter-spring transition period. The presence of mesoscale eddies and their characteristics, such as Eddy Kinetic Energy dominance and wider diameter, suggests the possible mechanism of baroclinic instability for eddy formation. The spatial variation in Available Potential Energy and its influence on regional dynamics, including chemical and biological response, are explained. Convective mixing and mesoscale eddies play a significant role in supporting diatom dominance and Noctiluca blooms in the region.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Cell Biology
Tomoyuki Shikata, Saho Kitatsuji, Koki Yuasa
Summary: A red tide is caused by the rapid increase in cell densities of autotrophic microalgae and heterotrophic protists, resulting in a change in the color of the sea. This phenomenon can negatively impact human activities such as fisheries and tourism. The factors and interactions that influence the diurnal vertical migration (DVM) behavior of red tide organisms are still unclear, preventing the precise simulation of DVM patterns and red tide development in the field.
FRONTIERS IN CELL AND DEVELOPMENTAL BIOLOGY
(2023)
Article
Environmental Sciences
Anne Gaedeke, Moritz Langer, Julia Boike, Eleanor J. Burke, Jinfeng Chang, Melissa Head, Christopher P. O. Reyer, Sibyll Schaphoff, Wim Thiery, Kirsten Thonicke
Summary: Amplified climate warming is leading to permafrost degradation and winter season shortening, impacting cost-effective overland travel across the Arctic. Results show a decrease in overland travel days and ice road construction days under different global warming scenarios, with Eastern Siberia being more resilient and regions like Alaska, Northwestern Russia, Northern Europe, and Chukotka being highly vulnerable. The reduction in travel days is most pronounced during the shoulder season, particularly in autumn.
ENVIRONMENTAL RESEARCH LETTERS
(2021)
Article
Oceanography
Jong-Ku Gal, Sun-Yong Ha, Jisoo Park, Kyung-Hoon Shin, Dongseon Kim, Nan-Young Kim, Sung-Ho Kang, Eun Jin Yang
Summary: Satellite observations and modeling data show an increase in net primary production in the Arctic Ocean due to retreating sea ice and warming, with under-ice blooms becoming more important. The role of sea-ice algae in these blooms is still unknown due to limited observations.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)
Article
Biology
Simo Njabulo Maduna, Jon Aars, Ida Floystad, Cornelya F. C. Klutsch, Eve M. L. Zeyl Fiskebeck, Oystein Wiig, Dorothee Ehrich, Magnus Andersen, Lutz Bachmann, Andrew E. Derocher, Tommi Nyman, Hans Geir Eiken, Snorre B. Hagen
Summary: Climate change-induced loss of Arctic sea ice is predicted to have negative impacts on genetic diversity and gene flow in ice-dependent species like polar bears. A study on polar bears in the Svalbard Archipelago showed a loss in genetic diversity and an increase in genetic differentiation, attributed to habitat fragmentation caused by reduced sea ice coverage leading to increased inbreeding within local populations. This highlights the importance of genetic monitoring for developing adaptive management strategies for polar bears and other ice-dependent species.
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2021)
Article
Environmental Sciences
Meilian Chen, Ji-Hoon Kim, Sungwook Hong, Yun Kyung Lee, Moo Hee Kang, Young Keun Jin, Jin Hur
Summary: The study revealed higher levels of terrestrial inputs and glaciofluvial runoffs in the Arctic fjords, especially in the southern Hornsund fjord. Extremely high levels of protein-like fluorescence were observed in summer at partially sea ice-covered fjords, consistent with near-ubiquity ice-edge blooms observed in the Arctic.
Article
Microbiology
Mengjia Zhang, Zongmei Cui, Feng Liu, Nansheng Chen
Summary: Study on the mitochondrial genome of Eucampia zodiacus revealed that common molecular markers are not sufficient to distinguish different strains, but whole mtDNA can differentiate genotypes, identifying a new molecular marker ezmt1 that can successfully differentiate different E. zodiacus strains isolated in various coastal regions in China.
FRONTIERS IN MICROBIOLOGY
(2021)
Article
Limnology
Audra Hinson, Spiro Papoulis, Lucas Fiet, Margaret Knight, Priscilla Cho, Brielle Szeltner, Ioannis Sgouralis, David Talmy
Summary: The influence of viruses on nutrient cycles and energy transfer in aquatic systems is important but still being determined. Researchers developed a dynamic model to capture the population dynamics of algal hosts and their viruses, and quantified the parameters underlying population dynamics in diverse algal groups. The study suggests a possible trade-off between virus size, infection rate, and carbon transfer efficiency from hosts to viruses upon lysis. The findings provide a quantitative trait-framework for understanding and quantifying virus activity in diverse natural communities.
LIMNOLOGY AND OCEANOGRAPHY
(2023)
Review
Multidisciplinary Sciences
Emil Boros, Marina Kolpakova
Article
Biochemistry & Molecular Biology
Kristof Korponai, Attila Szabo, Boglarka Somogyi, Emil Boros, Andrea K. Borsodi, Laura Jurecska, Lajos Voros, Tamas Felfoldi
Article
Ecology
Karoly Palffy, Lajos Voros
Article
Environmental Sciences
George S. Bullerjahn, Robert Michael L. McKay, Gabor Bernat, Ondrej Prasil, Lajos Voros, Karoly Palffy, Nora Tugyi, Boglarka Somogyi
JOURNAL OF GREAT LAKES RESEARCH
(2020)
Article
Ecology
Emil Boros, Katalin V-Balogh, Bianka Csitari, Lajos Voros, Anna J. Szekely
FRESHWATER BIOLOGY
(2020)
Article
Multidisciplinary Sciences
Attila Szabo, Kristof Korponai, Boglarka Somogyi, Balazs Vajna, Lajos Voeroes, Zsofia Horvath, Emil Boros, Nora Szabo-Tugyi, Karoly Marialigeti, Tamas Felfoeldi
SCIENTIFIC REPORTS
(2020)
Article
Marine & Freshwater Biology
Karoly Palffy, Attila W. Kovacs, Vivien Kardos, Imola Hausz, Gergely Boros
Summary: Research has shown that an increase in temperature can lead to greater variability in phytoplankton communities, particularly affecting the colonization and composition of chlorophytes and flagellated taxa. The study highlights the potential impacts of temperature on phytoplankton diversity and community structure, suggesting that higher temperatures may disrupt the predictability of annual cycles and succession pathways.
JOURNAL OF PLANKTON RESEARCH
(2021)
Article
Environmental Sciences
Katalin Zsuga, Zarina Inelova, Emil Boros
Summary: This research investigated the zooplankton community in shallow inland saline waters of Central Asia under arid steppe climate, revealing distinct characteristics of zooplankton composition in waters of different salinity levels.
Article
Environmental Sciences
Emil Boros, Anita Takacs, Peter Dobosy, Lajos Voros
Summary: This study found that the specific external phosphorus loading of waterbirds contributes significantly to the phosphorus pool in soda pans, while the contributions of groundwater and precipitation are relatively small. Waterbirds and internal phosphorus sources are the main factors influencing phosphorus concentrations in soda pans.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Review
Microbiology
Boglarka Somogyi, Tamas Felfoldi, Emil Boros, Attila Szabo, Lajos Voros
Summary: The extreme environmental conditions of diverse saline inland waters favor high abundance and contribution to phytoplankton biomass by picophytoplankton. Differences in picophytoplankton abundances exist among different saline water types, with higher abundances in hypersaline lakes compared to humic soda lakes and the highest numbers in turbid soda lakes. Despite the extreme conditions, the diversity of picophytoplankton remains remarkable.
Article
Multidisciplinary Sciences
Emil Boros
Summary: Estimating the nutrient loading of aquatic birds is complex and depends on biological, environmental, and methodological factors. Boros's generalized method estimates the carbon, nitrogen, and phosphorus loading of waterbirds based on their abundance and excrement nutrient content.
Article
Microbiology
Nora Szabo-Tugyi, Lajos Voros, Katalin Balogh, Zoltan Botta-Dukat, Gabor Bernat, Denes Schmera, Boglarka Somogyi
FEMS MICROBIOLOGY ECOLOGY
(2019)
Article
Ornithology
Richard J. Cuthbert, Tomas Aarvak, Emil Boros, Toni Eskelin, Vasiliy Fedorenko, Risto Karvonen, Andrey Kovalenko, Samuli Lehikoinen, Nicky Petkov, Attila Szilagyi, Janos Tar, Sami Timonen, Alexey Timoshenko, Konstantin Zhadan, Ivan Zuban