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Environmental Microbiology Reports

Santiago Plischuk, Karina Antúnez, Marina Haramboure, Graciela M Minardi, Carlos E Lange
An initial survey in 2009 carried out at a site in northwestern Patagonia region, Argentina, revealed for the first time in South America the presence of the flagellate Crithidia bombi and the neogregarine Apicystis bombi, two pathogens associated with the Palaearctic invasive bumble bee Bombus terrestris. In order to determine the long-term persistence and dynamics of this microparasite complex, four additional collections at the same site (San Carlos de Bariloche) were conducted along the following seven years...
January 13, 2017: Environmental Microbiology Reports
Danka Haruštiaková, Martin Welker
The cyanobacterial species Planktothrix rubescens is known to preferably inhabit deep, stratified, oligo- to mesotrophic lakes. It is also known for the production of diverse bioactive peptides, including the hepatotoxic microcystins. A number of studies showed that P. rubescens populations generally consist of multiple distinct genotypes or chemotypes, respectively. In the present study, variability of chemotype diversity was analysed. Filaments of P. rubescens were isolated from water samples originating from 10 European lakes and analysed by MALDI-TOF mass spectrometry...
January 13, 2017: Environmental Microbiology Reports
Jess Tyson, R Elizabeth Sockett
No abstract text is available yet for this article.
December 29, 2016: Environmental Microbiology Reports
David A Caron
No abstract text is available yet for this article.
December 26, 2016: Environmental Microbiology Reports
Javier Falgueras-Cano, José-Miguel Carretero-Díaz, Andrés Moya
No abstract text is available yet for this article.
December 26, 2016: Environmental Microbiology Reports
Karen A Cameron, Marek Stibal, Nathan Chrismas, Jason Box, Carsten S Jacobsen
Tropospheric nitrate levels are predicted to increase throughout the 21(st) century, with potential effects on terrestrial ecosystems, including the Greenland ice sheet (GrIS). This study considers the impacts of elevated nitrate concentrations on the abundance and composition of dominant bulk and active prokaryotic communities sampled from in situ nitrate fertilization plots on the GrIS surface. Nitrate concentrations were successfully elevated within sediment-filled meltwater pools, known as cryoconite holes; however, nitrate additions applied to surface ice did not persist...
December 10, 2016: Environmental Microbiology Reports
Joe D Taylor, Michael Cunliffe
Phytoplankton-derived polysaccharide microgels, including transparent exopolymer particles (TEP), are a major component of the marine organic carbon pool. Previous studies have made correlative links between phytoplankton material and bacterioplankton, and performed experiments that assess general responses to phytoplankton, yet there is a lack of direct empirical evidence of specific bacterioplankton responses to natural phytoplankton polysaccharide microgels. In this study, we used diatom produced TEP in controlled incubation experiments to determine the impact of polysaccharide microgels on a coastal bacterioplankton community...
December 10, 2016: Environmental Microbiology Reports
Jay T Lennon, Kenneth J Locey
No abstract text is available yet for this article.
December 10, 2016: Environmental Microbiology Reports
Jeff Errington
No abstract text is available yet for this article.
December 9, 2016: Environmental Microbiology Reports
Marcin Gołębiewski, Joanna Całkiewicz, Simon Creer, Kasia Piwosz
Most bacteria are found either in marine or fresh waters and transitions between the two habitats are rare, even though freshwater and marine bacteria co-occur in brackish habitats. Estuaries in brackish, tideless seas could be habitats where the transition of freshwater phylotypes to marine conditions occurs. We tested this hypothesis in the Gulf of Gdańsk (Baltic Sea) by comparing bacterial communities from different zones of the estuary, via pyrosequencing of 16S rRNA amplicons. We predicted the existence of a core microbiome (CM, a set of abundant OTUs present in all samples) comprising OTUs consisting of populations specific for particular zones of the estuary...
December 9, 2016: Environmental Microbiology Reports
Daniel N Marcus, Ameet Pinto, Karthik Anantharaman, Steven A Ruberg, Eva L Kramer, Lutgarde Raskin, Gregory J Dick
Manganese (Mn) oxides are highly reactive minerals that influence the speciation, mobility, bioavailability, and toxicity of a wide variety of organic and inorganic compounds. Although Mn(II)-oxidizing bacteria are known to catalyze the formation of Mn oxides, little is known about the organisms responsible for Mn oxidation in situ, especially in engineered environments. Mn(II)-oxidizing bacteria are important in drinking water systems, including in biofiltration and water distribution systems. Here we used cultivation dependent and independent approaches to investigate Mn(II)-oxidizing bacteria in drinking water sources, a treatment plant and associated distribution system...
December 9, 2016: Environmental Microbiology Reports
Nicole S Webster
No abstract text is available yet for this article.
December 1, 2016: Environmental Microbiology Reports
Andrea Franzetti, Federico Navarra, Ilario Tagliaferri, Isabella Gandolfi, Giuseppina Bestetti, Umberto Minora, Roberto Sergio Azzoni, Guglielmina Diolaiuti, Claudio Smiraglia, Roberto Ambrosini
Cryoconite holes, i.e. small ponds that form on glacier surface, are considered the most biologically active environments on glaciers. Bacterial communities in these environments have been extensively studied, but often through snapshot studies based on the assumption of a general stability of community structure. In this study, we investigated the temporal variation of bacterial communities in cryoconite holes on the Forni Glacier (Italian Alps) by high throughput DNA sequencing. We found a temporal change of bacterial communities, with autotrophic Cyanobacteria populations dominating communities after snowmelt, and heterotrophic Sphingobacteriales populations increasing in abundance later in the season...
November 29, 2016: Environmental Microbiology Reports
Frédérique Le Roux
No abstract text is available yet for this article.
November 29, 2016: Environmental Microbiology Reports
Kenneth Timmis, James Kenneth Timmis
No abstract text is available yet for this article.
November 29, 2016: Environmental Microbiology Reports
Patricia Bedrunka, Peter L Graumann
The structure of bacterial biofilms is predominantly established through the secretion of extracellular polymeric substances (EPS). We show that Bacillus subtilis contains an operon (ydaJ-N) whose induction leads to increased Congo Red staining of biofilms and strongly altered biofilm architecture, suggesting that it mediates the production of an unknown exopolysaccharide. Supporting this idea, overproduction of YdaJKLMN leads to cell clumping during exponential growth in liquid culture, and also causes colony morphology alterations in wild type cells, as well as in a mutant background lacking the major exopolysaccharide of B...
November 29, 2016: Environmental Microbiology Reports
Chad C Smith, Robert B Srygley, Emma I Dietrich, Ulrich G Mueller
Mating is a ubiquitous social interaction with the potential to influence the microbiome by facilitating transmission, modifying host physiology, and in species where males donate nuptial gifts to females, altering diet. We manipulated mating and nuptial gift consumption in two insects that differ in nuptial gift size, the Mormon cricket Anabrus simplex and the decorated cricket Gryllodes sigillatus, with the expectation that larger gifts are more likely to affect the gut microbiome. Surprisingly, mating, but not nuptial gift consumption, affected the structure of bacterial communities in the gut, and only in Mormon crickets...
November 28, 2016: Environmental Microbiology Reports
Guifré Torruella, David Moreira, Purificación López-García
Apusomonads are a mysterious group of heterotrophic gliding biflagellates branching deeply in the eukaryotic tree of life as sister group to opisthokonts (including animals, fungi and a variety of unicellular protists). Despite their evolutionary interest, their diversity and ecology remain largely unknown, with very few described species and environmental sequences in databases. Most environmental 18S rRNA gene-based studies generally fail to identify apusomonad sequences, which might be due to primer bias, low abundance and/or to the fact that their biotopes remain poorly explored...
November 28, 2016: Environmental Microbiology Reports
Helisson Faoro, Rodrigo Rene Menegazzo, Federico Battistoni, Prasad Gyaneshwar, Fernanda P do Amaral, Cecilia Taulé, Sydnee Rausch, Patricia Gonçalves Galvão, Cecilia de Los Santos, Shubhajit Mitra, Gabriela Heijo, Shih-Yi Sheu, Wen-Ming Chen, Cintia Mareque, Michelle Zibetti Tadra-Sfeir, J Ivo Baldani, Marta Maluk, Ana Paula Guimarães, Gary Stacey, Emanuel M de Souza, Fabio O Pedrosa, Leonardo Magalhães Cruz, Euan K James
The genome of Azoarcus olearius DQS-4(T) , a N2 -fixing Betaproteobacterium isolated from oil-contaminated soil in Taiwan, was sequenced and compared with other Azoarcus strains. The genome sequence showed high synteny with Azoarcus sp. BH72, a model endophytic diazotroph, but low synteny with five non-plant-associated strains (Azoarcus CIB, Azoarcus EBN1, Azoarcus KH32C, A. toluclasticus MF63(T) and Azoarcus PA01). Average Nucleotide Identity (ANI) revealed that DQS-4(T) shares 98.98% identity with Azoarcus BH72, which should now be included in the species A...
November 28, 2016: Environmental Microbiology Reports
Robert N Schaeffer, Rachel L Vannette, Claire Brittain, Neal M Williams, Tadashi Fukami
Nectar mediates interactions between plants and pollinators in natural and agricultural systems. Specialized microorganisms are common nectar inhabitants, and potentially important mediators of plant-pollinator interactions. However, their diversity and role in mediating pollination services in agricultural systems are poorly characterized. Moreover, agrochemicals are commonly applied to minimize crop damage, but may present ecological consequences for non-target organisms. Assessment of ecological risk has tended to focus on beneficial macroorganisms such as pollinators, with less attention paid to microorganisms...
November 26, 2016: Environmental Microbiology Reports
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