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An analysis of Great Salt Lake winogradsky columns

Journal of Oceanology and Limnology 2023年第4期41卷 1352-1368页

作者： Sierra A.DE LEON Anna E.JACKSON William BLACK William THOMAS Matt KRUBACK June BAXTER Bonnie K.BAXTER Great Salt Lake Institute Westminster UniversitySalt Lake City 84105USA Department of Visual Arts Westminster UniversitySalt Lake City 84105USA Natural History Museum of Utah University of UtahSalt Lake City 84112USA

Sergei winogradsky illuminated revolutionary concepts and produced a tool to visualize complex microbial communities and their metabolisms over time:columns displaying aquatic consortia with variety of *** worked with museums in Utah to create winogradsky columns that would highlight aesthetic properties of the Great Salt Lake(GSL)ecosystem,which has a salinity gradient from the freshwater wetlands to salt *** column,constructed using haloarchaea-rich hypersaline brine and oolitic sand of the lake’s north arm,was enriched with nutrients,and resulted in the desired pink hue over *** a seven-year maturation period,we examined the microbial taxa present in the water through 16 S/18 S rRNA and Internal Transcribed Spacer(ITS)gene sequencing.A pigment analysis revealed an abundance of bacteriochlorophyll *** presence of this pigment coupled with the DNA sequencing results,suggest that the haloarchaea that dominate the GSL brine,were not responsible for the pink coloration,but instead Gammaproteobacteria,especially Halorhodospira *** the eukaryotes,the lack of phytoplankton and the abundance of fungi were noteworthy *** data likely relate to the reduction of oxygen in a non-aerated sealed system over *** second exhibit had the goal of educating museum goers about the varying salinities of Great Salt *** we employed three distinct columns of water and sediment from this salinity *** of these columns overtime gave us information about invertebrate communities in addition to the microbial *** installations taught us about comparing an artificial environment in a museum setting to the natural *** together,we present the data collected and lessons learned from using winogradsky columns in public spaces for teaching about an important saline lake.

关键词： Great Salt Lake winogradsky halophiles extreme environment museum exhibit

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The effect of nitrification inhibitor 3,4-dimethylpyrazole phosphate (DMPP) on nitrifying organism populations under <i>in vitro</i>conditions

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Agricultural Sciences 2011年第3期2卷 198-200页

作者： David Beltran-Rendon Kenne Rico-Fragozo Lina Farfan-Caceres Hermann Restrepo-Diaz Lilliana Hoyos-Carvajal Faculty of Agronomy National University of Colombia Bogotá Colombia Faculty of Agronomy National University of Colombia Carrera 30 No 45-03 Edificio 500 Bogotá Colombia Faculty of Science Pontificia Universidad Javeriana Bogotá Colombia

The application of nitrification inhibitors is a technique to reduce the nitrate concentration on leachates that delay ammonium oxidation by reducing the activity of ammonium oxidizing bacteria in soils. Two experiments were carried out in order to estimate the influence of DMPP on the population of ammonium oxidization bacteria under in vitro conditions. In both experiments, three treatments were established. The treatments were the following: a) ammonium oxidization bacteria established in a growing media without fertilizers, b) ammonium oxidization bacteria established in a growing media with Urea, and c) ammonium oxidization bacteria established in a growing media with DMPP. Results obtained showed that the population of the ammonia oxidizing bacteria diminished in the DMPP treatment as compared with the urea and control treatments. In conclusion, DMMP influences on ammonium oxidization bacteria activity being a useful tool in fertilizers strategies to reduce the contamination by nitrates in groundwater.

关键词： Ammonium Oxidizing Bacteria Fertilizers Nitrogen Nitrification Inhibitors winogradsky

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