Article
Environmental Sciences
Jinhua Li, Peiyu Liu, Alima Tamaxia, Heng Zhang, Yan Liu, Jian Wang, Nicolas Menguy, Xiang Zhao, Andrew P. Roberts, Yongxin Pan
Summary: Magnetotactic bacteria (MTB) are prokaryotes that primarily inhabit the oxic-anoxic transition zone in aquatic environments, synthesizing magnetic nanocrystals and intracellular inclusions. The new magnetotactic spirillum strain WYHS-1 produces nearly isotropic magnetite crystals and contains various submicron inclusions, suggesting a role in biogeochemical elemental cycling and biomineral distribution in sediments.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2021)
Article
Geosciences, Multidisciplinary
Seth G. John, Rachel L. Kelly, Xiaopeng Bian, Feixue Fu, M. Isabel Smith, Nathan T. Lanning, Hengdi Liang, Benoit Pasquier, Emily A. Seelen, Mark Holzer, Laura Wasylenki, Tim M. Conway, Jessica N. Fitzsimmons, David A. Hutchins, Shun-Chung Yang
Summary: The study investigates the biogeochemical cycle of nickel in the oceans, revealing the distribution characteristics and influencing factors of oceanic nickel through a combination of experiments and simulations.
Article
Engineering, Environmental
Adam J. Williamson, Jonathan R. Lloyd, Christopher Boothman, Gareth T. W. Law, Samuel Shaw, Joe S. Small, Gianni F. Vettese, Heather A. Williams, Katherine Morris
Summary: This study investigated the biogeochemical processes of Tc in high pH, cementitious environments. The findings suggest that both biological and abiotic reduction play important roles in Tc removal in these environments.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Review
Microbiology
Hai-Zhen Zhu, Cheng-Ying Jiang, Shuang-Jiang Liu
Summary: Microbes in subterranean caves play a crucial role in cave evolution and biogeochemical cycling of elements, but there are still gaps in understanding how they sustain in caves with limited nutrients and interact with the cave environment.
FRONTIERS IN MICROBIOLOGY
(2022)
Review
Microbiology
Andreas Kappler, Casey Bryce, Muammar Mansor, Ulf Lueder, James M. Byrne, Elizabeth D. Swanner
Summary: The biogeochemical cycling of iron plays a crucial role in environmental processes such as ocean productivity, carbon storage, greenhouse gas emissions, and nutrient and contaminant fate. Recent studies have uncovered novel processes in the biogeochemical iron cycle and shown that oxidation and reduction of iron occur cyclically or simultaneously in many environments.
NATURE REVIEWS MICROBIOLOGY
(2021)
Article
Engineering, Environmental
Jeroen E. Sonke, Helene Angot, Yanxu Zhang, Alexandre Poulain, Erik Bjorn, Amina Schartup
Summary: Past and present anthropogenic mercury release has harmful effects on human health and has significant economic costs. The UNEP Minamata Convention on Mercury and global monitoring efforts aim to reduce mercury release and track its success. Global change factors such as deforestation and ocean stratification interact with the complex biogeochemical mercury cycle, leading to changes in mercury exposure. However, based on past declines in mercury release, it is expected that future policy impacts can be distinguished from global change effects at regional and global scales.
Article
Geography, Physical
Majed N. Turkistani, Eduard G. Reinhardt, David A. Kynaston, Janok P. Bhattacharya
Summary: This study investigates the associations between ancient deltaic environments and foram-iniferal and testate amoebae assemblages and finds clear relationships between test morphology and depositional environment.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Zhi-Lai Chi, Guang-Hui Yu
Summary: Mineral nanoparticles with enzyme-like characteristics, known as mineral nanozymes, are widely distributed in natural ecosystems and have tunable catalytic efficiency and robustness to harsh conditions. They play critical roles in environmental biogeochemical cycles and have promising prospects for applications in various fields.
SCIENCE CHINA-EARTH SCIENCES
(2021)
Review
Microbiology
Jean-Baptiste Ramond, Karen Jordaan, Beatriz Diez, Sandra M. Heinzelmann, Don A. Cowan
Summary: Arid ecosystems cover a significant portion of the Earth's terrestrial surface and contribute to the global nitrogen pool. These ecosystems are characterized by extreme conditions that limit the presence of macrofauna and flora and hinder plant growth and productivity. Microbes play a crucial role in the nitrogen cycling processes that drive primary production and nutrient biogeochemical cycling in these ecosystems. This survey provides insights into the current understanding of microbial-mediated nitrogen processes in different edaphic and refuge niches in arid environments.
MICROBIOLOGY AND MOLECULAR BIOLOGY REVIEWS
(2022)
Article
Geochemistry & Geophysics
Naman Deep Singh, Sunil Kumar Singh, Nirmalya Malla, Venkatesh Chinni
Summary: The study focuses on the marine biogeochemical cycling of Mn and its control over the production and diversity of marine phytoplankton, as well as its role as a sink for trace elements in the water column. The distribution of dissolved Mn (dMn) concentrations in the Arabian Sea (AS) shows spatial variations, with higher levels in the eastern AS compared to the central and western AS. The input of atmospheric dust deposition and other sources, such as riverine discharge and shallow shelf regions, contribute to the dMn distribution in the AS.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Environmental Sciences
Jean Claude Ndayishimiye, Tian Lin, Pascaline Nyirabuhoro, Gan Zhang, Wenjing Zhang, Yuri Mazei, Hossein Ganjidoust, Jun Yang
Summary: This study focused on examining the impact of human activities on chemical pollutants influx and environmental transformations in a large subtropical reservoir in south China. The research used a multi-proxy approach based on sediment core analysis and found that the development of the reservoir experienced two distinct stages, influenced by both anthropogenic sources and climatic factors. The study highlighted the significant relationship between testate amoebae community dynamics and environmental conditions, indicating a stronger impact of human disturbance on the ecosystem compared to natural environmental changes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Biochemistry & Molecular Biology
Ruben Gonzalez-Miguens, Milcho Todorov, Quentin Blandenier, Clement Duckert, Alfredo L. Porfirio-Sousa, Giulia M. Ribeiro, Diana Ramos, Daniel J. G. Lahr, David Buckley, Enrique Lara
Summary: In this study, the authors used Arcellinida testate amoebae as a model to test the paradigm of morphological stasis in protists. The results showed a lack of conservatism in shell outlines and widespread morphological convergences between far-related taxa. In addition, the authors revised the systematics and established a new infraorder and two new genera.
MOLECULAR PHYLOGENETICS AND EVOLUTION
(2022)
Review
Biology
Tyler P. Barnum, John D. Coates
Summary: This article summarizes the important roles of chlorine in Earth's systems and presents a comprehensive overview of its biogeochemical cycle. Chlorine enters the biosphere through volcanism and weathering of rocks and is sequestered through subduction and the formation of evaporite sediments. It undergoes transformations between different states and oxidation states, and is changed by living organisms and chemical reactions. The unified view of the chlorine cycle highlights the connections between chlorine biology, chemistry, and geology that impact life on Earth.
Article
Environmental Sciences
M. A. Davies, J. W. McLaughlin, M. S. Packalen, S. A. Finkelstein
Summary: Wetlands are the largest natural source of methane, yet the roles of source region and paleoclimate in explaining the variability in Holocene atmospheric methane concentrations remain poorly constrained. The study on Hudson Bay Lowlands (HBL) shows that total methane flux is closely related to the increasing area of land emerging from below sea level in the Middle Holocene, and due to lower evapotranspiration in a wetter and cooler climate in the Late Holocene, methane fluxes remained high.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2021)
Article
Environmental Sciences
Ruifeng Zhang, Laramie Jensen, Jessica Fitzsimmons, Robert M. Sherrell, Phoebe Lam, Yang Xiang, Seth John
Summary: The Arctic Ocean is unique, connecting the Atlantic and Pacific basins and being especially vulnerable to the impacts of a changing climate. Iron stable isotopes provide a unique window into the biogeochemical cycling of Fe in the Arctic. Research on seawater delta Fe-56 in the Western Arctic Ocean from the 2015 U.S. GEOTRACES GN01 transect has been presented.
GLOBAL BIOGEOCHEMICAL CYCLES
(2021)
Article
Plant Sciences
Fia Bengtsson, Hakan Rydin, Jennifer L. Baltzer, Luca Bragazza, Zhao-Jun Bu, Simon J. M. Caporn, Ellen Dorrepaal, Kjell Ivar Flatberg, Olga Galanina, Mariusz Galka, Anna Ganeva, Irina Goia, Nadezhda Goncharova, Michal Hajek, Akira Haraguchi, Lorna I. Harris, Elyn Humphreys, Martin Jirousek, Katarzyna Kajukalo, Edgar Karofeld, Natalia G. Koronatova, Natalia P. Kosykh, Anna M. Laine, Mariusz Lamentowicz, Elena Lapshina, Juul Limpens, Maiju Linkosalmi, Jin-Ze Ma, Marguerite Mauritz, Edward A. D. Mitchell, Tariq M. Munir, Susan M. Natali, Rayna Natcheva, Richard J. Payne, Dmitriy A. Philippov, Steven K. Rice, Sean Robinson, Bjorn J. M. Robroek, Line Rochefort, David Singer, Hans K. Stenoien, Eeva-Stiina Tuittila, Kai Vellak, James Michael Waddington, Gustaf Granath
Summary: The study investigated the impact of global and local environmental factors on the growth and carbon uptake of the Sphagnum genus across 99 Holarctic peatlands. Results showed that climate, nitrogen deposition, water table depth, and vascular plant cover had significant effects on Sphagnum growth, with different responses observed between species. Indirect effects, such as the influence of vascular plant cover on water table depth, nitrogen deposition, precipitation, and temperature, were also important in shaping Sphagnum growth patterns.
JOURNAL OF ECOLOGY
(2021)
Article
Environmental Sciences
Jean-Marc Bonmatin, Edward A. D. Mitchell, Gaetan Glauser, Elizabeth Lumawig-Heitzman, Florencia Claveria, Maarten Bijleveld van Lexmond, Kumiko Taira, Francisco Sanchez-Bayo
Summary: Residues of neonicotinoids were found in soil, water, and people's hair samples in three agricultural regions of the Philippines, indicating environmental and human contamination. The study revealed a strong correlation between hair residue levels and concentrations of neonicotinoids in soil, suggesting a potential source of human exposure to these pesticides.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Geography, Physical
Yangmin Qin, Hongkai Li, Yuri Mazei, Irina Kurina, Graeme T. Swindles, Anatoly Bobrov, Andrey N. Tsyganov, Yansheng Gu, Xianyu Huang, Jiantao Xue, Mariusz Lamentowicz, Katarzyna Marcisz, Thomas Roland, Richard J. Payne, Edward A. D. Mitchell, Shucheng Xie
Summary: Testate amoebae are commonly used as proxy indicators in ecological and palaeoecological studies, but the diversity and ecology of testate amoebae in Asian peatlands are poorly documented. This study compiled data from 42 peatlands across Asia and developed hydrological transfer functions for water table depth estimation, showing comparable predictive capability to models in Europe and North America. The developed transfer function can be used for palaeohydrological reconstructions in boreal to subtropical peatlands in Asia.
QUATERNARY SCIENCE REVIEWS
(2021)
Article
Microbiology
Florent Mazel, Lucie Malard, Helene Niculita-Hirzel, Erika Yashiro, Heidi K. Mod, Edward A. D. Mitchell, David Singer, Aline Buri, Eric Pinto, Nicolas Guex, Enrique Lara, Antoine Guisan
Summary: Protists play key trophic functions in soil and their contributions vary across large environmental gradients. In the Swiss Alps, the dominance of consumers in soil decreases at higher elevations, with a corresponding increase in the ratio of parasites. The taxonomic composition of protists also varies with elevation and soil pH, influencing their functional composition along the elevational gradient.
ENVIRONMENTAL MICROBIOLOGY
(2022)
Article
Microbiology
Luciana Burdman, Gabriela Mataloni, Edward A. D. Mitchell, Enrique Lara
Summary: Testate amoebae, a diverse group of shelled protists, have been found to have higher diversity in Tierra del Fuego peatlands compared to Northern Hemisphere peatlands. The discovery of numerous new species in this region suggests that the number of Gondwanian and Neotropical endemic testate amoeba may be substantially higher than currently known. Additionally, previous reports of Holarctic taxa in Tierra del Fuego may be due to forcing the identification of morphotypes to descriptions in literature from other regions.
EUROPEAN JOURNAL OF PROTISTOLOGY
(2021)
Article
Ecology
Leonardo D. Fernandez, Christophe V. W. Seppey, David Singer, Bertrand Fournier, Dylan Tatti, Edward A. D. Mitchell, Enrique Lara
Summary: The study tracked the phylogenetic signal of common soil protists along an elevational gradient in Switzerland, revealing different adaptation strategies to climate change among different groups of protists. The results suggest that soil protists face evolutionary constraints in colder climates, limiting their distribution and adaptation. This niche conservatism potentially drives the biogeography and macroecology of soil protists along climatic gradients.
Article
Environmental Sciences
Bernard Laubscher, Manuel Diezi, Raffaele Renella, Edward A. D. Mitchell, Alexandre Aebi, Matthieu Mulot, Gaetan Glauser
Summary: This study revealed the presence of multiple neonicotinoids and their metabolites in the cerebrospinal fluid, plasma, and urine of children. The contamination by multiple neonicotinoids is a potential hazard not only for non-target insects like bees but also for children.
ENVIRONMENTAL HEALTH
(2022)
Article
Microbiology
Anatoly Bobrov, Clement Duckert, Edward A. D. Mitchell
Summary: The article describes a new species of Certesella genus, Certesella larai, found in Sphagnum mosses and forest litter samples collected in the Dominican Republic and Chile. Although the new species shares characteristics with Porosia and Certesella genera, it also shows distinct differences, suggesting a need for molecular analyses to confirm its phylogenetic position. The presence of this new species in two distant regions - Caribbean and central Chile - suggests a likely widespread distribution, highlighting the need for more systematic sampling efforts to document the full taxonomic diversity of soil protists.
ACTA PROTOZOOLOGICA
(2021)
Article
Microbiology
Andrey N. Tsyganov, Anatoly A. Bobrov, Satoshi D. Shimano, Edward A. D. Mitchell, Yasuo Hagiwara, Adeline A. J. Wall, Natalia G. Mazei, Viktor A. Chernyshov, Manfred Wanner, Yuantan Zhong, Yoichiro Sogame, Yuri A. Mazei
Summary: The study investigated the species diversity and composition of soil- and moss-dwelling testate amoeba assemblages along an elevation gradient on Mount Fuji. The results showed that the species composition of testate amoeba assemblages was strongly influenced by elevation, with vegetation type playing a significant role in mediating this effect.
EUROPEAN JOURNAL OF PROTISTOLOGY
(2022)
Article
Soil Science
Lucie A. Malard, Heidi K. Mod, Nicolas Guex, Olivier Broennimann, Erika Yashiro, Enrique Lara, Edward A. D. Mitchell, Helene Niculita-Hirzel, Antoine Guisan
Summary: This study found that edaphic properties were the most important drivers of community diversity and composition for all microbial groups, with microbial taxa showing increased specialization in highly selective environments.
SOIL BIOLOGY & BIOCHEMISTRY
(2022)
Article
Geosciences, Multidisciplinary
Edward E. Berg, Darrell S. Kaufman, R. Scott Anderson, Gregory C. Wiles, Thomas V. Lowell, Edward A. D. Mitchell, Feng Sheng Hu, Alan Werner
Summary: Recent decades of warming climate in southern Alaska have led to drying wetlands and falling lake levels. This study examines the historical fluctuations in lake levels, including high and low stands, and the impact of these changes on vegetation succession. The research also highlights how data from peat records in satellite fens can be used to reconstruct paleo-lake levels.
Article
Biochemistry & Molecular Biology
Stefan Geisen, Enrique Lara, Edward Mitchell
Summary: Soil protists are being increasingly studied due to their diversity and importance in ecosystems, but many of these studies lack depth in knowledge and use incorrect terms and interpretations. This paper aims to help non-experts avoid common errors in studying soil protists, providing suggestions for appropriate terms and highlighting challenges in interpreting data. It warns against relying on incomplete reference databases and drawing causal inferences without experimental confirmation and understanding of taxa biology. The authors envision this work to contribute to a better understanding of soil ecology by facilitating the inclusion of protists in ecological analyses.
MOLECULAR ECOLOGY RESOURCES
(2023)
Article
Biochemistry & Molecular Biology
Guillaume Lentendu, Estelle P. Bruni, Claudine Ah-Peng, Junichi Fujinuma, Yasuhiro Kubota, Juan Lorite, Julio Penas, Shuyin Huang, Dominique Strasberg, Pascal Vittoz, Edward A. D. Mitchell
Summary: By using a filtration-sedimentation method, we improved the recovery of soil protist environmental DNA while reducing the co-extraction of non-target organisms. The method showed a 2-3 fold enrichment in shelled protists, with a decrease in fungi and plants. The findings suggest that this method can significantly enhance the resolution of soil protist diversity estimation in eDNA metabarcoding studies.
MOLECULAR ECOLOGY RESOURCES
(2023)
Article
Ecology
Shuyin Huang, Guillaume Lentendu, Junichi Fujinuma, Takayuki Shiono, Yasuhiro Kubota, Edward A. D. Mitchell
Summary: The development of high-throughput sequencing of environmental DNA has facilitated the study of soil microbial diversity patterns. This study compared two sampling approaches for soil protists along an elevation gradient in Japan and found that sampling a single plot per elevation band was sufficient to estimate soil micro-eukaryotic diversity patterns along elevation gradients.
Meeting Abstract
Medicine, General & Internal
B. Laubscher, M. Diezi, R. Renella, E. A. D. Mitchell, A. Aebi, M. Mulot, G. Glauser
SWISS MEDICAL WEEKLY
(2022)