Article
Environmental Sciences
Zhengdong Wang, Bingfang Wu, Miao Zhang, Hongwei Zeng, Leidong Yang, Fuyou Tian, Zonghan Ma, Hantian Wu
Summary: Biological soil crusts (BSCs) are important in drylands, but accurate data on their distribution is lacking. This study developed indices and a machine learning framework to map BSC distribution in the Mu Us Sandy Land and Gurbantunggut Desert in China, enhancing mapping accuracy and providing basic data for exploring the ecological effects of BSCs.
REMOTE SENSING OF ENVIRONMENT
(2022)
Article
Entomology
Roland Bamou, Adama Zan Diarra, Marie Paul Audrey Mayi, Borel Djiappi-Tchamen, Christophe Antonio-Nkondjio, Philippe Parola
Summary: Wolbachia bacteria, which can change host biology and suppress vector population, were found in 8 out of 22 mosquito species collected in Cameroon. Main vectors of diseases like dengue and malaria were not infected, while other species like C. moucheti showed relatively high infection rates. Further characterization of the Wolbachia strains is warranted.
Article
Plant Sciences
Lauren M. Baldarelli, Nicole Pietrasiak, Karina Osorio-Santos, Jeffrey R. Johansen
Summary: This study described two new Mojavia species from the Atacama Desert in Chile and the Mojave Desert in the USA, which strengthened Mojavia's position as a sister genus to Nostoc. The two new species exhibited unique morphological and ecological characteristics, as well as clear differences from Nostoc.
JOURNAL OF PHYCOLOGY
(2022)
Article
Soil Science
Chao Guan, Peng Zhang, Changming Zhao, Xinrong Li
Summary: The study found that soil respiration in BSC-dominated microsites was inhibited under warming treatment, with moss-dominated crusts experiencing a higher level of inhibition compared to lichen-dominated crusts. Soil respiration rates were significantly increased by rainfall pulses during precipitation events and then gradually declined.
Article
Public, Environmental & Occupational Health
Dmitriy V. Volokhov, Lauren R. Lock, Kristin E. Dyer, Isabella K. DeAnglis, Benjamin R. Andrews, Molly C. Simonis, Sebastian Stockmaier, Gerald G. Carter, Cynthia J. Downs, M. Brock Fenton, Nancy B. Simmons, Daniel J. Becker
Summary: This study uncovered additional hemoplasma diversity in bats by targeting rare or undersampled host species.
Article
Environmental Sciences
Jennifer Mills, Gregory E. Maurer, Laura N. Lammers, Ronald Amundson
Summary: The Mojave Desert has experienced significant warming and aridification in the past 50 years, leading to accelerated cycling of carbon and nitrogen in the soil and their subsequent loss. This indicates chemical impacts on the coupled carbon and nitrogen cycles in response to climate change.
GLOBAL BIOGEOCHEMICAL CYCLES
(2022)
Article
Parasitology
Priscila Ikeda, Jaire Marinho Torres, Elizabete Captivo Lourenco, Gregory F. Albery, Heitor Miraglia Herrera, Carina Elisei de Oliveira, Rosangela Zacarias Machado, Marcos Rogerio Andre
Summary: The occurrence and genetic diversity of hemoplasmas in bats and ectoparasites in central-western Brazil were investigated. High genetic diversity was found among the 16S rRNA hemoplasma sequences detected in non-hematophagous bats, with 12 distinct genotypes identified.
Article
Plant Sciences
Nicole Pietrasiak, Sharon Reeve, Karina Osorio-Santos, David A. Lipson, Jeffrey R. Johansen
Summary: Cyanobacteria are vital components of dryland soils and the newly described genus Trichotorquatus is based on four new species isolated from various regions in California, USA and Chile. These species are morphologically distinct but phylogenetically closely related, with potential for further differentiation using molecular data. The study highlights the challenge of recognizing diversity in this cryptic genus due to the presence of multiple ribosomal operons.
JOURNAL OF PHYCOLOGY
(2021)
Article
Biodiversity Conservation
Fangfang Cai, Shuheng Li, Hang Zhang, Gongliang Yu, Renhui Li
Summary: A new species of cyanobacteria, Nodosilinea hunanesis, was isolated from a freshwater pond in Zhangjiajie National Forest Park, China. It was characterized through a polyphasic study and found to be distinct from other known Nodosilinea species based on morphological, ecological, and molecular data.
Article
Microbiology
Jie Tang, Mahfuzur R. Shah, Dan Yao, Ying Jiang, Lianming Du, Kelei Zhao, Liheng Li, Meijin Li, Michal M. Waleron, Malgorzata Waleron, Krzysztof Waleron, Maurycy Daroch
Summary: In this study, a thermophilic strain, PKUAC-SCTAE412, recovered from Lotus Lake hot spring in China, was characterized using polyphasic approaches. The results supported the existence of a novel genus within Leptolyngbyaceae, which was further confirmed by genomic analyses. The complete genome of this strain provided insights into its adaptation to the hot spring environment and revealed a large number of genes possibly acquired through horizontal gene transfer. The study lays the foundation for future global ecogenomic and geogenomic studies.
FRONTIERS IN MICROBIOLOGY
(2022)
Article
Biodiversity Conservation
Denis Davydov, Anna Vilnet, Irina Novakovskaya, Elena Patova
Summary: The strains of Drouetiella species from a terrestrial biotope in the Arctic and Subarctic areas of European Russia were isolated and characterized using an integrative approach. The study showed the morphological plasticity of Drouetiella species and identified a new taxon. The analysis of 16S-23S ITS rRNA sequences revealed differences in length and nucleotide composition, affecting the hypothetical secondary structures of certain helices.
Article
Microbiology
Jie Tang, Liheng Li, Meijin Li, Lianming Du, Md Mahfuzur R. Shah, Michal M. Waleron, Malgorzata Waleron, Krzysztof F. Waleron, Maurycy Daroch
Summary: The study identified a thermophilic strain and proposed a new taxon Thermoleptolyngbya sichuanensis sp. nov. based on polyphasic approaches. The strain showed genetic adaptations to hot spring environments and displayed genetic divergence from other strains at the genome scale.
FRONTIERS IN MICROBIOLOGY
(2021)
Article
Soil Science
Yang Wang, Yu Hong, Yulu Tian, Guiquan Tian, Jinghui Zhang, Huawu Wu, Yan Bai, Jingmei Qian
Summary: Soil water availability is a critical limitation for soil respiration and ecosystem functions in biological soil crusts of arid ecosystems. A 3-year field experiment in a desert shrub in northwestern China revealed that increased rainfall led to an increase in microbial biomass carbon and nitrogen, while soil organic carbon, total nitrogen, pH, and biological thickness remained relatively stable. Water addition significantly altered the bacterial community composition, with Actinobacteria increasing and Bacteroidetes and Cyanobacteria decreasing in abundance. The effects of soil physiochemical properties and bacterial community composition on soil respiration varied, with soil physiochemical properties having a larger impact.
Article
Microbiology
Sierra D. D. Jech, Caroline A. A. Havrilla, Nichole N. N. Barger
Summary: Up to 35% of global drylands have undergone degradation, resulting in the loss of soil communities and important functions. The extent of disturbance plays a role in the natural recovery of these soil communities. Our study found that disturbance extents smaller than 1 m(2) recover at similar rates, with soil stability returning to high levels after 1.5 years of natural recovery.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Microbiology
Joseph R. Petrone, Paula Rios Glusberger, Christian D. George, Patricia L. Milletich, Angelica P. Ahrens, Luiz Fernando Wurdig Roesch, Eric W. Triplett
Summary: Despite the availability of third-generation sequencing technologies, Illumina sequencing is still widely used in modern bacterial ecology studies for phylogenetic classification. Nanopore sequencing has now become a leading method for performing differential bacterial abundance analysis due to its ease, cost, and portability. A pipeline called RESCUE was developed to sequence bacterial rrn operons and improve taxonomic resolution, and it was shown to accurately classify species and resolve errors caused by short reads.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Plant Sciences
Sandra C. Akagham, Jeffrey R. Johansen, Dike Nwankwo, Kedong Yin
Article
Plant Sciences
Laura Gonzalez-Resendiz, Jeffrey R. Johansen, Hilda Leon-Tijera, Leon Sanchez, Claudia Segal-Kischinevzky, Viviana Escobar-Sanchez, Marcia Morales
JOURNAL OF PHYCOLOGY
(2019)
Article
Plant Sciences
Sergei Shalygin, Regina R. Shalygina, Vera V. Redkina, Cory B. Gargas, Jeffrey R. Johansen
Article
Plant Sciences
Melaku Mesfin, Jeffrey R. Johansen, Nicole Pietrasiak, Lauren M. Baldarelli
Article
Plant Sciences
Jiri Komarek, Jeffrey R. Johansen, Jan Smarda, Otakar Strunecky
Article
Plant Sciences
Nicole Pietrasiak, Sharon Reeve, Karina Osorio-Santos, David A. Lipson, Jeffrey R. Johansen
Summary: Cyanobacteria are vital components of dryland soils and the newly described genus Trichotorquatus is based on four new species isolated from various regions in California, USA and Chile. These species are morphologically distinct but phylogenetically closely related, with potential for further differentiation using molecular data. The study highlights the challenge of recognizing diversity in this cryptic genus due to the presence of multiple ribosomal operons.
JOURNAL OF PHYCOLOGY
(2021)
Article
Plant Sciences
Jeffrey R. Johansen, Laura Gonzalez-Resendiz, Viviana Escobar-Sanchez, Claudia Segal-Kischinevzky, Jose Martinez-Yerena, Joaquin Hernandez-Sanchez, Gabriela Hernandez-Perez, Hilda Leon-Tejera
Summary: A number of heterocytous, tapering cyanobacteria in the Rivulariaceae family have been observed on the Atlantic and Pacific coasts, with new species characterized and described from the coasts of Mexico. Genetic separation based on the 16S-23S ITS region was pronounced. Despite the addition of new species, Nunduva and Kyrtuthrix remain morphologically and phylogenetically separate.
JOURNAL OF PHYCOLOGY
(2021)
Article
Biochemistry & Molecular Biology
Radka Hauerova, Tomas Hauer, Jan Kastovsky, Jiri Komarek, Olga Lepsova-Skacelova, Jan Mares
Summary: Recent research revealed that the previously thought similar Tenebriella actually belongs to a new genus and is capable of forming prominent microbial mats. Molecular phylogenetics analysis identified unique morphological and ecological characteristics of Tenebriella, leading to the recognition of two new species within this genus.
MOLECULAR PHYLOGENETICS AND EVOLUTION
(2021)
Article
Microbiology
Ryan D. Ward, Jason E. Stajich, Jeffrey R. Johansen, Marcel Huntemann, Alicia Clum, Brian Foster, Bryce Foster, Simon Roux, Krishnaveni Palaniappan, Neha Varghese, Supratim Mukherjee, T. B. K. Reddy, Chris Daum, Alex Copeland, I-M A. Chen, Natalia N. Ivanova, Nikos C. Kyrpides, Nicole Shapiro, Emiley A. Eloe-Fadrosh, Nicole Pietrasiak
Summary: Metagenomes of 50 terrestrial cyanobacterial cultures have been constructed to support phylogenomic studies of evolutionary relationships and gene content among these unique algae and their aquatic relatives.
MICROBIOLOGY RESOURCE ANNOUNCEMENTS
(2021)
Article
Marine & Freshwater Biology
I-Shuo Huang, Nicole Pietrasiak, Christopher J. Gobler, Jeffrey R. Johansen, JoAnn M. Burkholder, Sue D'Antonio, Paul Zimba
Summary: Cyanobacterial blooms have been on the rise due to climate change and human activities, leading to the accumulation of bioactive compounds that can impact human health and the environment. This study analyzed bioactive metabolites in 71 genera of cyanobacteria from different habitats, revealing varying patterns of metabolite production among freshwater, marine, and terrestrial genera. The findings provide valuable insights for environmental management and highlight the toxin potential of terrestrial cyanobacteria.
Article
Plant Sciences
Amber O. Brown, Caitlin S. Romanis, Petr Dvorak, Amanda J. Foss, Quincy A. Gibson, Chelsea D. Villanueva, Wendy N. Durden, Alyssa D. Garvey, Phillip Jenkins, Petr Hasler, Jeffrey R. Johansen, Brett A. Neilan, Dale A. Casamatta
Summary: Two cyanobacterial strains collected from St. Johns River in Jacksonville, Florida, were identified as a new species, Komarekiella delphini-convector, with similar 16S rRNA gene sequences. However, there is controversy over their toxin-producing potential, and further analysis is needed to determine their pathogenicity.
Article
Plant Sciences
Lauren M. Baldarelli, Nicole Pietrasiak, Karina Osorio-Santos, Jeffrey R. Johansen
Summary: This study described two new Mojavia species from the Atacama Desert in Chile and the Mojave Desert in the USA, which strengthened Mojavia's position as a sister genus to Nostoc. The two new species exhibited unique morphological and ecological characteristics, as well as clear differences from Nostoc.
JOURNAL OF PHYCOLOGY
(2022)
Article
Biodiversity Conservation
Lira A. Gaysina, Jeffrey R. Johansen, Aniket Saraf, Rezeda Z. Allaguvatova, Sagarika Pal, Prashant Singh
Summary: A new species of the genus Roholtiella, Roholtiella volcanica sp. nov., was discovered during the study of biodiversity of cyanobacteria in Gorely volcano soils. Morphological, ecological, and phylogenetic analyses were conducted to describe and classify the new species. This research contributes to the understanding of cyanobacterial diversity and taxonomy.
Article
Biodiversity Conservation
Jan Kastovsky, Jeffrey R. Johansen, Radka Hauerova, Mildred U. Akagha
Summary: In this study, cyanobacterial samples were collected from thermal sites in Yellowstone National Park, and the richness of filamentous cyanobacteria was discussed. A new genus and several new species were described, and the merging of other genera was proposed based on molecular data analysis.
Article
Ecology
L. A. Gaysina, A. Fazlutdinova, N. Mukhina, L. E. Akhrnadeyeva, D. Yu Rogozin, A. O. Bul'khin, N. Sulehanova, J. R. Johansen
THEORETICAL AND APPLIED ECOLOGY
(2020)