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
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)
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
Biodiversity Conservation
Thomas G. Sim, Graeme T. Swindles, Paul J. Morris, Andy J. Baird, Dan J. Charman, Matthew J. Amesbury, Dave Beilman, Alex Channon, Angela V. Gallego-Sala
Summary: This study utilized new transfer functions to reconstruct water-table depth (WTD) and pH in Svalbard peatlands, enabling a greater understanding of the long-term impact of climate change on these ecosystems.
ECOLOGICAL INDICATORS
(2021)
Article
Paleontology
Nawaf A. Nasser, Braden R. B. Gregory, David Singer, R. Timothy Patterson, Helen M. Roe
Summary: Testate lobose amoebae of the order Arcellinida are a diverse group of shelled protists found in various environments. The family Difflugidae includes many species and subspecies, with molecular evidence suggesting that test morphology is more important in categorizing distinct taxa than test composition. The reclassification of Difflugia bidens as the type species of genus Erugomicula highlights the importance of test morphology in taxonomy.
PALAEONTOLOGIA ELECTRONICA
(2021)
Article
Biodiversity Conservation
Rafael Carballeira, Xabier Pontevedra-Pombal
Summary: Testate amoebae are important bioindicators of Sphagnum peatland ecosystems, which are threatened wetland types with a delicate biogeochemical balance. A study on chemical parameters and testate amoebae diversity in the western Iberian Peninsula revealed an inverse relationship between diversity and conservation status, influenced by anthropogenic activities and geographical patterns of disturbance.
Review
Microbiology
Aaron Kofman, Jeannette Guarner
Summary: Infections caused by Naegleria fowled, Acanthamoeba spp., and Balamuthia mandrillaris have various clinical manifestations in humans. These amoebae are widely present in water and soil worldwide. Naegleria fowleri causes primary amoebic meningoencephalitis (PAM), while Acanthamoeba spp. and B. mandrillaris cause granulomatous amoebic encephalitis (GAE). Acanthamoeba spp. can also cause keratitis, and both Acanthamoeba spp. and B. mandrillaris can cause skin and respiratory mucosa lesions. Clinical diagnosis of these infections can be difficult due to their rarity, and they can be misdiagnosed if not suspected. Microscopy is the key first step in diagnosis, but expertise in infectious disease pathology or clinical microbiology is required to distinguish the amoebae from macrophages or other infectious agents. Molecular methods can be helpful but are only available in referral centers. Treatment involves a combination of antibiotics and antifungals, but even with prompt diagnosis and treatment, the mortality rate for neurological disease is extremely high.
JOURNAL OF CLINICAL MICROBIOLOGY
(2022)
Article
Microbiology
Angela L. Creevy, David M. Wilkinson, Roxane Andersen, Richard J. Payne
Summary: The extensive drainage of peatlands in north-west Europe for afforestation has led to changes in carbon balance and biodiversity value. Large-scale restoration projects aim to restore the hydrological conditions and promote active peat growth. This study investigated the response of testate amoebae assemblages and vegetation composition after tree removal on a drained raised bog. The results show that microbial recovery is a slow process, with vegetation composition responding faster than the microbial assemblages.
EUROPEAN JOURNAL OF PROTISTOLOGY
(2023)
Article
Microbiology
Simon R. M. Jones, Derek Price
Summary: This study investigated the occurrence of amoebic gill disease in farmed Atlantic salmon in British Columbia, Canada, and found distinct spatial and temporal patterns. The results showed a significant relationship between seawater temperature and gill scores, indicating temperature as a major risk factor.
Article
Microbiology
Kenneth Dumack, Ferry Siemensma, Steffen Clauss
Summary: Thecofilosea is a class in Cercozoa that mainly consists of freshwater algivores. In this study, we cultured and characterized many isolates of Thecofilosean amoebae using both morphological and molecular approaches. Rare spine-bearing taxa in Thecofilosea have not been molecularly characterized before. By isolating single cells from the habitat of Pamphagus armatus and sequencing their SSU rDNA, we found that Pamphagus armatus belongs to the family Rhizaspididae (Tectofilosida, Thecofilosea). Consequently, we propose transferring Pamphagus armatus and the closely related species Lecythium spinosum to the genus Rhizaspis.
EUROPEAN JOURNAL OF PROTISTOLOGY
(2022)
Article
Environmental Sciences
Kevin D. Barrett, Patricia Sanford, Sara C. Hotchkiss
Summary: Peatland complexes in the humid highlands of Hawai'i are crucial for biodiversity and freshwater resources. Analysis of testate amoebae and Cladocera in Hawaiian montane peatlands on Kohala revealed the importance of surface moisture in controlling species distribution. The study provides insights into the paleohydrological history of Hawaiian peatlands and the sensitivity of testate amoeba composition to changing environmental conditions.
JOURNAL OF PALEOLIMNOLOGY
(2021)
Article
Fisheries
Alessia Cocco, Marica Toson, Alberto Perolo, Claudia Casarotto, Eleonora Franzago, Ginevra Brocca, Ranieri Verin, Francesco Quaglio, Manuela Dalla Pozza, Laura Bille
Summary: Nodular Gill Disease (NGD) is a newly emerging condition that causes gill damage in farmed freshwater fish, particularly rainbow trout, resulting in significant economic losses for the industry. A study was conducted in the Autonomous Province of Trento, Italy to determine the prevalence of NGD and identify potential risk factors for its introduction to trout farms. Data analysis revealed that 42% of the investigated farms tested positive for NGD. The presence of other diseases in the same farm and proximity to farms located 5 km upstream were identified as possible risk factors. These findings highlight the potential role of impaired immune systems caused by coexisting diseases and water in the spread of pathogens.
JOURNAL OF FISH DISEASES
(2023)
Article
Microbiology
Michelle M. McKeown, Edward A. D. Mitchell, Matthew J. Amesbury, Quentin Blandenier, Dan Charman, Clement Duckert, Thomas P. Roland, Graeme T. Swindles, Jamie R. Wood, Janet M. Wilmshurst
Summary: New Zealand is a hotspot of biodiversity for macroscopic organisms, but its microbial diversity is poorly documented. Testate amoebae are mainly found in wetlands and the South Island of NZ, with greater diversity at higher latitudes. Future research should aim to broaden geographical and ecological ranges, with the prediction that the diversity gradient will change over time.
EUROPEAN JOURNAL OF PROTISTOLOGY
(2021)
Article
Biology
Marina Patsyuk
Summary: For the first time, the species and morphotypes complexes of naked amoebae in various types of soils in Ukraine were studied. The results showed that the species and morphotype composition of naked amoebae were significantly influenced by soil humidity, with differences in species diversity observed among different soil types.
Article
Microbiology
Martin Kostka, Luis Fernando Lares-Jimenez, Tomas Tyml, Iva Dykova
JOURNAL OF EUKARYOTIC MICROBIOLOGY
(2017)
Article
Microbiology
Tomas Tyml, Luis F. Lares-Jimenez, Martin Kostka, Iva Dykova
JOURNAL OF EUKARYOTIC MICROBIOLOGY
(2017)
Article
Microbiology
Tomas Tyml, Iva Dykova
EUROPEAN JOURNAL OF PROTISTOLOGY
(2017)
Article
Microbiology
Tomas Tyml, Martina Lisnerova, Martin Kostka, Iva Dykova
EUROPEAN JOURNAL OF PROTISTOLOGY
(2018)
Article
Microbiology
Tomas Tyml, Iva Dykova
JOURNAL OF EUKARYOTIC MICROBIOLOGY
(2018)
Article
Physiology
Katina Roumbedakis, Marie Drabkova, Tomas Tyml, Carlo di Cristo
FRONTIERS IN PHYSIOLOGY
(2018)
Article
Microbiology
Chloe J. English, Tomas Tyml, Natasha A. Botwright, Andrew C. Barnes, James W. Wynne, Paula C. Lima, Mathew T. Cook
EUROPEAN JOURNAL OF PROTISTOLOGY
(2019)
Article
Biology
Tomas Tyml, Shailesh Date, Tanja Woyke
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2019)
Article
Multidisciplinary Sciences
Marie Drabkova, Nikola Jachnikova, Tomas Tyml, Hana Sehadova, Oleg Ditrich, Eva MySkova, Vaclav HypSa, Jan Stefka
SCIENTIFIC REPORTS
(2019)
Article
Parasitology
Raquel Hermans, Maarten P. M. Vanhove, Oleg Ditrich, Tomas Tyml, Milan Gelnar, Tom Artois, Nikol Kmentova
Summary: This study fills the knowledge gap on monogenean parasites infecting thorny skate in the northern part of its range, identifying two species of parasites and confirming their distribution in the area. There is relatively high morphological variation in Acanthocotyle verrilli compared to its congeners, and sclerotised structures are found to have high diagnostic significance in the identification of Rajonchocotyle, suggesting further genetic studies are needed to assess migration patterns.
PARASITOLOGY INTERNATIONAL
(2021)
