Article
Biology
Fehmida Bibi, Esam Ibraheem Azhar
Summary: This study investigated the microbial diversity of two sponges and a coral sample from the Red Sea in Saudi Arabia using pyrosequencing. The results revealed that sponge H. caerulea had significantly high bacterial diversity and identified 17 different bacterial genera across the three samples.
SAUDI JOURNAL OF BIOLOGICAL SCIENCES
(2021)
Article
Entomology
Isabel Ballesteros, Mishell Bravo-Castro, Santiago Villamarin-Cortez, Gabriela Jijon, Narcis Prat, Blanca Rios-Touma, Christian Villamarin
Summary: This study aims to investigate the impact of environmental characteristics on Polypedilum diversity and distribution, revealing high genetic variability and richness, with dissolved oxygen and temperature identified as the main environmental factors affecting their distribution.
Review
Engineering, Marine
Conny Sjoqvist
Summary: Phytoplankton, as photosynthetic organisms, are essential for the marine food web and oxygen production. They have high levels of genetic diversity and potential for adaptive evolution, which can be influenced by global change. However, current research on their genetic diversity and adaptation is limited. The low number of reference genomes and functional annotation hinder the understanding of genomic diversity. Emerging technologies, such as metagenome and transcriptome data, provide a more realistic view of phytoplankton diversity.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Soil Science
Nakul Dar, Charleton P. P. Thompson, Kurt Williamson
Summary: Despite limited knowledge about viruses in soil, this study utilized marker genes to investigate the genetic diversity of viruses in 42 soil samples. The results suggest that geographic distance may be more important than environmental source in explaining sequence-based differences across samples.
BIOLOGY AND FERTILITY OF SOILS
(2023)
Article
Agricultural Engineering
Jafar Mehdi, Danish Husain, Abhilasha Srivastava, Namita Gupta, Karuna Shanker, Mohammad Talha, Raj Kishori Lal, Birendra Kumar, Anil Kumar Gupta
Summary: This study conducted extensive morphometric and chemometric mapping of natural populations of Cannabis in India, revealing a strong correlation between their genetic diversity and regional distribution. The findings provide a foundation for identifying and selecting lines with key agronomic traits for maximizing the potential of this promising crop.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Article
Environmental Sciences
Yonggang Wang, Jiangqin Wang, Feifan Leng, Jixiang Chen
Summary: 454 pyrosequencing was used to analyze the microbial community and diversity of oily farmland soil from Fushun, Liaoning Province, China. The study found that petroleum hydrocarbons significantly altered the structure and diversity of soil microbial communities, with dominant bacterial flora changing in oil-contaminated areas.
GEOMICROBIOLOGY JOURNAL
(2021)
Article
Plant Sciences
Shiva Hamidzadeh Moghadam, Mohammad Taghi Alebrahim, Mehdi Mohebodini, Dana R. R. MacGregor
Summary: In this study, DNA from Amaranthus retroflexus L. and Chenopodium album L. was collected from three different countries to assess genetic diversity using ISSR markers. The analysis showed low genetic diversity within populations and high genetic diversity among populations for both weed species. Furthermore, gene flow among populations was found to be low. Clustering analysis and principal coordinate analysis revealed the presence of four distinct genetic groups for both A. retroflexus L. and C. album L. These findings suggest that each population was independently introduced, and the genetic variability of these weeds allows them to adapt and avoid management practices. However, the results do not support the native status of C. album L. in Iran.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Ecology
Charles Bachy, Charmaine C. M. Yung, David M. Needham, Maria Consuelo Gazitua, Simon Roux, Alexander J. Limardo, Chang Jae Choi, Danielle M. Jorgens, Matthew B. Sullivan, Alexandra Z. Worden
Summary: The study identified two ecotypes of the marine picoeukaryote Bathycoccus prasinos, Clade BI and newly named Clade BII (Bathycoccus calidus). Different viruses targeting these ecotypes showed distinct infection characteristics, with BII viruses demonstrating higher infectivity and mortality rates. The geographically linked distribution of host and virus clades suggests species-level host specificity and highlights the importance of strain-level variations in infection parameters.
Review
Biochemistry & Molecular Biology
Domenico Tierno, Gabriele Grassi, Serena Scomersi, Marina Bortul, Daniele Generali, Fabrizio Zanconati, Bruna Scaggiante
Summary: The poor survival of triple-negative breast cancer (TNBC) is attributed to its aggressive behavior, large heterogeneity, and high risk of recurrence. Next-generation sequencing (NGS) has been used to investigate the molecular characteristics of TNBC, revealing recurrent pathogenic alterations in TP53, immunocheckpoint response genes, and PIK3CA and DNA repair pathways. NGS has also identified potential personalized treatments and novel biomarkers such as AURKA, MYC, and JARID2 mutations. Additionally, NGS studies have identified ethnicity-specific alterations in African and African American TNBC, including EZH2 overexpression, BRCA1 alterations, and a BRCA2-delaAAGA mutation. The development of long-read sequencing methods and their combination with optimized short-read techniques hold promise for improving the efficiency of NGS approaches in future clinical use.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Entomology
Cuong Van Duong, Ji Hyoun Kang, Van Vinh Nguyen, Yeon Jae Bae
Summary: This study assessed the invasion pattern of the yellow fever mosquito Aedes aegypti in Vietnam by investigating its distribution, relative abundance with its competitor Aedes albopictus, and genetic diversity. The results revealed that the distribution and abundance of Aedes aegypti are influenced by climate region, larval habitat, and the presence of Aedes albopictus. Additionally, a high level of genetic diversity was found in Aedes aegypti, forming two major genetic lineages. These findings are important for optimizing vector control strategies for mosquito invasion and outbreak prediction in Asia.
Review
Microbiology
Kassia J. G. da Silva, Jose A. L. Fernandes, Franco Magurno, Larissa B. A. Leandro, Bruno T. Goto, Raquel C. Theodoro
Summary: This review examines the wall ornamentation of Acaulospora species and conducts phylogenetic analyses based on ITS and SSU-ITS-LSU (nrDNA). The study reveals that temperate and tropical zones are the most diverse regions for Acaulospora species. It also confirms the inclusion of Kuklospora species in the Acaulospora genus and determines that A. sporocarpia does not belong to Acaulospora.
Article
Ecology
Chunmei Zhang, Huirong Li, Yinxin Zeng, Haitao Ding, Bin Wang, Yangjie Li, Zhongqiang Ji, Yonghong Bi, Wei Luo
Summary: This study investigated the diversity and assembly processes of microbial eukaryotes in freshwater lakes on the Fildes Peninsula using high-throughput sequencing. The results revealed significant differences in community structures and co-occurrence patterns among the lakes, with water temperature and phosphate identified as the driving factors. Stochastic processes predominated in community assembly over deterministic processes.
Article
Biodiversity Conservation
Izabela S. Mendes, Bruno F. Melo, Junio S. Damasceno, Daniel F. Teixeira, Daniel C. Carvalho
Summary: Using molecular analysis with mitochondrial and nuclear loci, it is discovered that H. copelandii has two well-defined genetic lineages, which might be related to headwater capture events around 2.8 million years ago. This hidden diversity provides valuable information for taxonomy and conservation in a severely impacted region of Brazil.
Article
Environmental Sciences
Yitong Ding, Ming Li, Baozhu Pan, Gengnan Zhao, Li Gao
Summary: The study found that the phytoplankton community composition in different regions of the Yellow River is greatly influenced by spatial and climatic factors, with a lesser impact from water quality. Phytoplankton biomass in impoundments was significantly higher than in free-flowing rivers, primarily due to anthropogenic impacts.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Genetics & Heredity
Yiqing Peng, Alam Nafee-Ul, Mingzhi Liu, Qiuling He, Zongsuo Liang
Summary: Radix bupleuri, a bulk medicinal material in China, is widely used in clinical applications and drug discovery. This research investigated the variations in agronomic traits, active component content, and genetic diversity in different Radix bupleuri germplasms, providing evidence for selecting better strains.
Review
Environmental Sciences
Ingrid Wiedmann, Elizaveta Ershova, Bodil Annikki Bluhm, Eva-Maria Noethig, Rolf R. Gradinger, Ksenia Kosobokova, Antje Boetiusa
FRONTIERS IN MARINE SCIENCE
(2020)
Article
Environmental Sciences
Eva-Maria Noethig, Simon Ramondenc, Antonie Haas, Laura Hehemann, Andreas Walter, Astrid Bracher, Catherine Lalande, Katja Metfies, Ilka Peeken, Eduard Bauerfeind, Antje Boetius
FRONTIERS IN MARINE SCIENCE
(2020)
Article
Oceanography
Gabrielle Nadai, Eva-Maria Noethig, Louis Fortier, Catherine Lalande
Summary: This study investigated the impact of snow and sea ice cover on microalgal fluxes in the Beaufort Sea, finding that delayed sea ice breakup and early snowmelt in 2016 contributed to higher diatom fluxes, while delayed sea ice algae release led to lower diatom and PPC fluxes when snowmelt occurred late. The ongoing sea ice reduction due to global warming may increase PPC fluxes to the seafloor and carbon sequestration at depth in the Arctic Ocean.
PROGRESS IN OCEANOGRAPHY
(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
Oceanography
Bianca T. P. Liguori, Claudia Ehlert, Eva-Maria Noethig, Jan C. van Ooijen, Katharina Pahnke
Summary: In the ice-covered Central Arctic Ocean, diatom production is limited by light availability and nutrient supply, with higher production at the sea ice edge and over partially ice-free shelf areas. The Transpolar Drift transports terrestrial-derived material across the CAO, impacting the Si cycle. Si isotopes help understand the differences in biological production areas and the potential influence of the TPD.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2021)
Article
Biology
Eduard Fadeev, Andreas Rogge, Simon Ramondenc, Eva-Maria Noethig, Claudia Wekerle, Christina Bienhold, Ian Salter, Anya M. Waite, Laura Hehemann, Antje Boetius, Morten H. Iversen
Summary: The study found that large aggregates from sea-ice and under-ice diatom blooms play a key role in carbon export dynamics along the water column, increasing export efficiency and microbial connectivity. Continuous sea-ice loss may decrease vertical export efficiency, impacting Arctic deep-sea ecosystems.
COMMUNICATIONS BIOLOGY
(2021)
Article
Microbiology
Anabel von Jackowski, Kevin W. Becker, Matthias Wietz, Christina Bienhold, Birthe Zancker, Eva-Maria Noethig, Anja Engel
Summary: The seasonal variations in biopolymers, microbial abundance, and microbial composition in the upper 100 meters of the Fram Strait were investigated during summer and fall. The study found a shift in the autotrophic community from picoeukaryotes dominating in summer to an increase of Synechococcus by fall. Additionally, a decline in biopolymers concentrations was observed along with increasing microbial diversity and a community shift towards fewer polymer-degrading genera in fall.
ENVIRONMENTAL MICROBIOLOGY
(2022)
Article
Microbiology
Charles Bachy, Lisa Sudek, Change Jae Choi, Charlotte A. Eckmann, Eva-Maria Noethig, Katja Metfies, Alexandra Z. Worden
Summary: There are critical questions regarding the abundance and export of picophytoplankton in the Arctic. This study analyzes samples from the Fram Strait and reveals the importance of the prasinophyte Micromonas in the Arctic marine ecosystem, despite its small size.
Article
Ecology
Jennifer Provencher, Tanja Kogel, Amy Lusher, Katrin Vorkamp, Alessio Gomiero, Ilka Peeken, Maria Granberg, Sjurdur Hammer, Julia Baak, Jan Rene Larsen, Eivind Farmen
Summary: Lack of knowledge on litter and microplastics in the Arctic hinders global efforts to reduce their presence. To address this, monitoring in four priority compartments is recommended, with refinement of methods for other compartments to monitor future sources and effects. Community-based local components should be included, and coordination for pan-Arctic assessments is important.
Article
Limnology
Simon Ramondenc, Eva-Maria Nothig, Lili Hufnagel, Eduard Bauerfeind, Kathrin Busch, Nadine KnUppel, Angelina Kraft, Franz Schroter, Miriam Seifert, Morten H. Iversen
Summary: The collection of zooplankton swimmers and sinkers in time-series sediment traps provides unique insight into year-round and interannual trends in zooplankton population dynamics. The study investigated zooplankton composition based on swimmers and sinkers collected by sediment traps, displaying seasonal and interannual variations in dominant zooplankton groups.
LIMNOLOGY AND OCEANOGRAPHY
(2023)
Article
Ecology
Valerie Gros, Bernard Bonsang, Roland Sarda-Esteve, Anna Nikolopoulos, Katja Metfies, Matthias Wietz, Ilka Peeken
Summary: Dimethyl sulfide (DMS) and methanethiol (MeSH) were quantified in North Atlantic and Arctic Ocean surface waters, revealing unique spatial patterns. DMS had higher concentrations in polar waters due to its origin from sea ice, while MeSH showed decoupled processes of production and conversion. The contribution of MeSH to the sulfur budget was higher than previously observed, indicating its potential importance as a sulfur source. Correlations with bacterial taxa and isoprene-producing phytoplankton further highlighted the significance of MeSH and isoprene in the marine ecosystem.
Article
Geography, Physical
Stefanie Arndt, Christian Haas, Hanno Meyer, Ilka Peeken, Thomas Krumpen
Summary: The recent decrease in summer sea ice extent in the Weddell Sea has led to questions about the contributions of dynamic and thermodynamic atmospheric and oceanic energy fluxes. Research findings show that snow depth, superimposed ice, and snow ice play important roles in the ice's energy balance, and their properties have remained relatively constant in the past decades. Additional analyses using atmospheric reanalysis data and satellite observations indicate limited recent changes in the summer energy balance and melt onset.
Article
Limnology
Judith Piontek, Luisa Galgani, Eva-Maria Noethig, Ilka Peeken, Anja Engel
Summary: Research shows that the Arctic Ocean is highly sensitive to climate change with rapid ice loss, leading to changes in dissolved organic matter production and inventories that have the potential to enhance bacterial remineralization in seawater and sea ice.
LIMNOLOGY AND OCEANOGRAPHY
(2021)
Article
Geography, Physical
Jutta E. Wollenburg, Morten Iversen, Christian Katlein, Thomas Krumpen, Marcel Nicolaus, Giulia Castellani, Ilka Peeken, Hauke Flores
