Article
Microbiology
Ying Pan, Guihao Li, Lei Su, Pengfei Zheng, Yaping Wang, Zhuo Shen, Zigui Chen, Qiuying Han, Jun Gong
Summary: Seagrass colonization significantly affects the structure and function of belowground microeukaryotes, reducing their diversity and increasing heterotroph biomass. This study also highlights the relationship between eukaryotic parasites hotspot and high productivity in natural ecosystems.
FRONTIERS IN MICROBIOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Feilun Wu, Yuanchi Ha, Andrea Weiss, Meidi Wang, Jeffrey Letourneau, Shangying Wang, Nan Luo, Shuquan Huang, Charlotte T. Lee, Lawrence A. David, Lingchong You
Summary: Spatial partitioning modulates the dynamics of microbial communities, promoting the persistence of populations with negative interactions and suppressing those with positive interactions. An intermediate level of partitioning maximizes the overall diversity of the community.
NATURE CHEMICAL BIOLOGY
(2022)
Review
Virology
Mohammadreza Sadeghi, Yuji Tomaru, Tero Ahola
Summary: RNA viruses are a major component of marine virus assemblages, with limited species described, but recent studies suggest extraordinary diversity in aquatic RNA viromes. These viruses likely play a significant ecological role for marine unicellular eukaryotic hosts.
Article
Evolutionary Biology
Emma E. George, Daria Tashyreva, Waldan K. Kwong, Noriko Okamoto, Ales Horak, Filip Husnik, Julius Lukes, Patrick J. Keeling
Summary: Gene transfer agents (GTAs) are virus-like structures that facilitate DNA transfer between prokaryotic cells, and are found in the highly reduced genomes of bacterial endosymbionts from microbial eukaryotes. Studies indicate that GTAs in endosymbionts undergo purifying selection and are likely functional, but their ecological role remains unknown and further research is needed to understand how they contribute to host interactions.
GENOME BIOLOGY AND EVOLUTION
(2022)
Article
Environmental Sciences
Xiuping Liu, Ningdong Xie, Mohan Bai, Jiaqian Li, Guangyi Wang
Summary: The study revealed significant and distinct impacts of coastal upwelling on the abundance, diversity, and community structure of microbial eukaryotes. While the evenness of the microbial eukaryotes was reduced and Shannon diversity slightly decreased, the community composition showed obvious variations, especially between upwelling and non-upwelling stations in the surface waters. Additionally, temperature was identified as the most important factor influencing the microbial eukaryotic community composition.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Biology
Ali Ebrahimi, Akshit Goyal, Otto X. Cordero
Summary: Microbial foraging in patchy environments, particularly in the oceans, is influenced by the interaction between detachment rates from particles and net growth and mortality rates. Our mathematical model explains how different detachment rates can lead to stable coexistence of marine populations. Fluctuating environments increase the likelihood of coexistence by favoring both growth and mortality.
Article
Environmental Sciences
Christina Bonsell, Kenneth H. Dunton
Summary: Our study in a shallow High Arctic kelp bed in the Beaufort Sea, Alaska, examined patterns of propagule recruitment to assess succession timescale and trajectory. We found that bottom waters remain frozen with low light levels for 8-9 months, while summer period is characterized by higher temperatures and measurable irradiance. Spatial differences in epilithic assemblages were observed, with a positive correlation between cover by crustose coralline algae and distance to river inputs.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Ecology
Kate Lazzeri, Linda A. Auker
Summary: Non-native basibionts may facilitate invasions through epibiosis in Maine, while native basibionts have a higher Shannon Diversity Index.
FRONTIERS IN ECOLOGY AND EVOLUTION
(2022)
Article
Multidisciplinary Sciences
Nastasia J. Freyria, Nathalie Joli, Connie Lovejoy
Summary: The study shows the seasonal dynamics of microbial communities in the North Water region, indicating that summer communities are more variable, while autumn communities favor undescribed dinoflagellates. Despite nutrient input, autumn chlorophyll concentrations remained low.
SCIENTIFIC REPORTS
(2021)
Article
Limnology
Yu Wang, Rui Zhang, Yunfeng Yang, Qichao Tu, Jizhong Zhou, Nianzhi Jiao
Summary: Ocean acidification significantly changes the metabolism and structure of plankton communities in the ocean. Evaluating the response of marine bacterioplankton to acidification is important for understanding future biogeochemical processes in the ocean. However, the influence of acidification on the functional diversity of bacterioplankton is still unclear.
LIMNOLOGY AND OCEANOGRAPHY
(2023)
Article
Environmental Sciences
Ying Li, Wei Chen, Xiaoying Zheng, Qiang Liu, Wei Xiang, Jixiang Qu, Chengfang Yang
Summary: The study found that the sludge retention time (SRT) can significantly affect the microbial community structure in a hybrid membrane bioreactor (HMBR), with different trends appearing in the three functional units. The largest number of mutual operational taxonomic units was found in the suspended filler mixture and suspended carrier with SRTs of 20 days and 30 days. Species belonging to Proteobacteria had the greatest contribution to between-group differences in the 10-day SRT group.
Review
Biochemistry & Molecular Biology
Katherine E. Dougan, Raul A. Gonzalez-Pech, Timothy G. Stephens, Sarah Shah, Yibi Chen, Mark A. Ragan, Debashish Bhattacharya, Cheong Xin Chan
Summary: Modern microbial taxonomy often relies on single or concatenated marker genes for classification. However, using whole-genome data can provide more accurate classification, especially for microbial eukaryotes.
TRENDS IN MICROBIOLOGY
(2022)
Article
Biotechnology & Applied Microbiology
Ningdong Xie, Dana E. Hunt, Zackary Johnson, Yaodong He, Guangyi Wang
Summary: This study focuses on the role of heterotrophic microeukaryotes, particularly the Labyrinthulomycetes, in remineralizing organic material in the coastal ocean. The research reveals distinct community patterns of Labyrinthulomycetes compared to bacteria and fungi, highlighting their potentially multifaceted involvement in marine food webs. The study emphasizes the importance of incorporating heterotrophic microeukaryotes into marine ecosystem models to enhance our understanding of microbial community ecology and broader studies of biogeochemistry and climate change.
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
(2021)
Article
Environmental Sciences
Peter Stimmler, Anders Prieme, Bo Elberling, Mathias Goeckede, Joerg Schaller
Summary: Global warming is causing increased greenhouse gas release from Arctic soils, potentially changing the Arctic from a carbon sink to a future source. It is important to understand the factors controlling soil microbial community structure and activity to accurately predict future greenhouse gas release. Soil conditions, such as salinity, influenced by changes in Si and Ca concentrations due to climate change, can affect microbial activity and CO2 production in Arctic soils.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Peter Stimmler, Anders Prieme, Bo Elberling, Mathias Goeckede, Joerg Schaller
Summary: Global warming is causing an increase in greenhouse gas release from Arctic soils, potentially changing the Arctic from a carbon sink to a carbon source. The concentration of Si and Ca in soil plays a crucial role in organic carbon turnover and should be considered in estimating Arctic carbon budgets.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Jung-Woo Park, Yejin Kim, Kwan-Woo Kim, Amane Fujiwara, Hisatomo Waga, Jae Joong Kang, Sang-Heon Lee, Eun-Jin Yang, Toru Hirawake
Summary: The northern Bering and Chukchi seas are biologically productive regions, but recent environmental changes have had unprecedented effects. This study investigated the dominant phytoplankton communities and their contributions to primary production in these regions. The results showed that diatoms and phaeocystis were dominant phytoplankton communities in 2016, while diatoms and Prasinophytes were dominant in 2017. Small phytoplankton contributed differently to total primary production in the two years. Furthermore, there were distinct biochemical differences between small and large phytoplankton.
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
Environmental Sciences
Youngju Lee, Jinyoung Jung, Tae Wan Kim, Eun Jin Yang, Jisoo Park
Summary: In the Amundsen Sea, global warming has accelerated ice melt and affected various ocean properties. A study on phytoplankton growth found that light limitation plays a role in determining phytoplankton abundance and biomass. Different responses to light and sinking rates of each species were found to control the distribution of phytoplankton in the surface layer.
ENVIRONMENTAL RESEARCH
(2022)
Article
Limnology
Jun Xia, Sohiko Kameyama, Florian Prodinger, Takashi Yoshida, Kyoung-Ho Cho, Jinyoung Jung, Sung-Ho Kang, Eun-Jin Yang, Hiroyuki Ogata, Hisashi Endo
Summary: This study investigated the relationship between microbial eukaryotic communities and viruses in the northern Chukchi Sea. The results showed a significant correlation between the two communities, indicating that viruses have a strong impact on eukaryotic communities in this region of the Arctic Ocean.
LIMNOLOGY AND OCEANOGRAPHY
(2022)
Article
Multidisciplinary Sciences
H. W. Yang, T-W Kim, Pierre Dutrieux, A. K. Wahlin, Adrian Jenkins, H. K. Ha, C. S. Kim, K-H Cho, T. Park, S. H. Lee, Y-K Cho
Summary: This study investigates the seasonal variability and local forcing for the currents moving into and out of the Dotson ice shelf cavity using data from three bottom-mounted mooring arrays. It reveals that warm, salty water flows southward along the eastern channel slope, with maximum current velocities. On the other hand, freshened ice shelf meltwater flows northward at intermediate depth above the western slope. The inflow is correlated with local ocean surface stress curl, while the outflow follows the warm influx with a delay of about 2-3 months. Ocean circulation near Dotson Ice Shelf, affected by sea ice distribution and wind, significantly controls the inflow of warm water and subsequent ice shelf melting on seasonal time-scales.
NATURE COMMUNICATIONS
(2022)
Article
Ecology
Sehwa Chun, Hyoung Sul La, Wuju Son, Young Cheol Kim, Kyoung-Ho Cho, Eun Jin Yang
Summary: This study developed an automated, quantitative method for detecting diel vertical migration (DVM) using 2D cross-correlation. The method showed better performance than previous methods and had a high detection rate of 88%. This method provides a robust and efficient way to analyze DVM behaviors in ocean environments.
METHODS IN ECOLOGY AND EVOLUTION
(2022)
Article
Oceanography
Jee-Hoon Kim, Hyoung Sul La, Kyoung-Ho Cho, Jinyoung Jung, Sung-Ho Kang, Kanghyun Lee, Eun Jin Yang
Summary: This study is the first comprehensive investigation of Arctic zooplankton, revealing significant spatial variations in the distribution and structure of these communities in the western Arctic Ocean, which are influenced by factors such as water temperature, salinity, and sea ice.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)
Article
Oceanography
Cecilia Bertosio, Christine Provost, Marylou Athanase, Nathalie Sennechael, Gilles Garric, Jean-Michel Lellouche, Clement Bricaud, Joo-Hong Kim, Kyoung-Ho Cho, Taewook Park
Summary: This study examined the changes in Arctic freshwater distribution and circulation using model simulations and observations. The findings suggest that the Beaufort Gyre serves as the major reservoir of freshwater in the Arctic Ocean, with a northward extension in recent years. Changes in freshwater content were also observed in other regions, which subsequently affected the freshwater export pattern from the Arctic Ocean.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)
Article
Oceanography
Cecilia Bertosio, Christine Provost, Marylou Athanase, Nathalie Sennechael, Gilles Garric, Jean-Michel Lellouche, Joo-Hong Kim, Kyoung-Ho Cho, Taewook Park
Summary: This study examines the evolution of halocline waters in the Makarov Basin and along the East Siberian continental slope from 2007 to 2020. It finds that Atlantic-derived lower halocline waters have been progressing eastward, leading to a strengthening of boundary currents and the shedding of mesoscale eddies. The increasing contribution from Atlantic waters has weakened the halocline, suggesting a new Arctic Ocean regime extending into the Amerasian Basin.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)
Article
Oceanography
Jinyoung Jung, Youngju Lee, Kyoung-Ho Cho, Eun Jin Yang, Sung-Ho Kang
Summary: The distribution of dissolved organic carbon (DOC) in the western Arctic Ocean during the summer season was investigated. The concentration and contribution of riverine DOC in the surface layer of the Chukchi Borderland/northern Chukchi Sea region were higher than those in the East Siberian Sea/Mendeleyev Ridge region. Marine DOC was the dominant component in both regions, but the East Siberian shelf/slope region had higher concentration and contribution of marine DOC, which was attributed to high bacterial abundance and nutrient supply from the deep layer.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)