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4 results on '"Johnston, Eric R."'

1. Metagenomics Reveals Pervasive Bacterial Populations and Reduced Community Diversity across the Alaska Tundra Ecosystem

Author

Johnston, Eric R, Rodriguez-R, Luis M, Luo, Chengwei, Yuan, Mengting M, Wu, Liyou, He, Zhili, Schuur, Edward AG, Luo, Yiqi, Tiedje, James M, Zhou, Jizhong, and Konstantinidis, Konstantinos T

Subjects
Microbiology, Biological Sciences, Ecology, Human Genome, Genetics, tundra, soil microbiology, metagenomics, ecosystem ecology, environmental science, permafrost, climate change, microbial diversity, Environmental Science and Management, Soil Sciences, Medical microbiology
Abstract

How soil microbial communities contrast with respect to taxonomic and functional composition within and between ecosystems remains an unresolved question that is central to predicting how global anthropogenic change will affect soil functioning and services. In particular, it remains unclear how small-scale observations of soil communities based on the typical volume sampled (1-2 g) are generalizable to ecosystem-scale responses and processes. This is especially relevant for remote, northern latitude soils, which are challenging to sample and are also thought to be more vulnerable to climate change compared to temperate soils. Here, we employed well-replicated shotgun metagenome and 16S rRNA gene amplicon sequencing to characterize community composition and metabolic potential in Alaskan tundra soils, combining our own datasets with those publically available from distant tundra and temperate grassland and agriculture habitats. We found that the abundance of many taxa and metabolic functions differed substantially between tundra soil metagenomes relative to those from temperate soils, and that a high degree of OTU-sharing exists between tundra locations. Tundra soils were an order of magnitude less complex than their temperate counterparts, allowing for near-complete coverage of microbial community richness (~92% breadth) by sequencing, and the recovery of 27 high-quality, almost complete (>80% completeness) population bins. These population bins, collectively, made up to ~10% of the metagenomic datasets, and represented diverse taxonomic groups and metabolic lifestyles tuned toward sulfur cycling, hydrogen metabolism, methanotrophy, and organic matter oxidation. Several population bins, including members of Acidobacteria, Actinobacteria, and Proteobacteria, were also present in geographically distant (~100-530 km apart) tundra habitats (full genome representation and up to 99.6% genome-derived average nucleotide identity). Collectively, our results revealed that Alaska tundra microbial communities are less diverse and more homogenous across spatial scales than previously anticipated, and provided DNA sequences of abundant populations and genes that would be relevant for future studies of the effects of environmental change on tundra ecosystems.

Published
2016

2. A communal catalogue reveals Earth’s multiscale microbial diversity

Author

Thompson, Luke R., Sanders, Jon G., McDonald, Daniel, Amir, Amnon, Ladau, Joshua, Locey, Kenneth J., Prill, Robert J., Tripathi, Anupriya, Gibbons, Sean M., Ackermann, Gail, Navas-Molina, Jose A., Janssen, Stefan, Kopylova, Evguenia, Vázquez-Baeza, Yoshiki, González, Antonio, Morton, James T., Mirarab, Siavash, Zech Xu, Zhenjiang, Jiang, Lingjing, Haroon, Mohamed F., Kanbar, Jad, Zhu, Qiyun, Jin Song, Se, Kosciolek, Tomasz, Bokulich, Nicholas A., Lefler, Joshua, Brislawn, Colin J., Humphrey, Gregory, Owens, Sarah M., Hampton-Marcell, Jarrad, Berg-Lyons, Donna, McKenzie, Valerie, Fierer, Noah, Fuhrman, Jed A., Clauset, Aaron, Stevens, Rick L., Shade, Ashley, Pollard, Katherine S., Goodwin, Kelly D., Jansson, Janet K., Gilbert, Jack A., Knight, Rob, Rivera, Jose L. Agosto, Al-Moosawi, Lisa, Alverdy, John, Amato, Katherine R., Andras, Jason, Angenent, Largus T., Antonopoulos, Dionysios A., Apprill, Amy, Armitage, David, Ballantine, Kate, Bárta, Jirˇí, Baum, Julia K., Berry, Allison, Bhatnagar, Ashish, Bhatnagar, Monica, Biddle, Jennifer F., Bittner, Lucie, Boldgiv, Bazartseren, Bottos, Eric, Boyer, Donal M., Braun, Josephine, Brazelton, William, Brearley, Francis Q., Campbell, Alexandra H., Caporaso, J. Gregory, Cardona, Cesar, Carroll, JoLynn, Cary, S. Craig, Casper, Brenda B., Charles, Trevor C., Chu, Haiyan, Claar, Danielle C., Clark, Robert G., Clayton, Jonathan B., Clemente, Jose C., Cochran, Alyssa, Coleman, Maureen L., Collins, Gavin, Colwell, Rita R., Contreras, Mónica, Crary, Benjamin B., Creer, Simon, Cristol, Daniel A., Crump, Byron C., Cui, Duoying, Daly, Sarah E., Davalos, Liliana, Dawson, Russell D., Defazio, Jennifer, Delsuc, Frédéric, Dionisi, Hebe M., Dominguez-Bello, Maria Gloria, Dowell, Robin, Dubinsky, Eric A., Dunn, Peter O., Ercolini, Danilo, Espinoza, Robert E., Ezenwa, Vanessa, Fenner, Nathalie, Findlay, Helen S., Fleming, Irma D., Fogliano, Vincenzo, Forsman, Anna, Freeman, Chris, Friedman, Elliot S., Galindo, Giancarlo, Garcia, Liza, Garcia-Amado, Maria Alexandra, Garshelis, David, Gasser, Robin B., Gerdts, Gunnar, Gibson, Molly K., Gifford, Isaac, Gill, Ryan T., Giray, Tugrul, Gittel, Antje, Golyshin, Peter, Gong, Donglai, Grossart, Hans-Peter, Guyton, Kristina, Haig, Sarah-Jane, Hale, Vanessa, Hall, Ross Stephen, Hallam, Steven J., Handley, Kim M., Hasan, Nur A., Haydon, Shane R., Hickman, Jonathan E., Hidalgo, Glida, Hofmockel, Kirsten S., Hooker, Jeff, Hulth, Stefan, Hultman, Jenni, Hyde, Embriette, Ibáñez-Álamo, Juan Diego, Jastrow, Julie D., Jex, Aaron R., Johnson, L. Scott, Johnston, Eric R., Joseph, Stephen, Jurburg, Stephanie D., Jurelevicius, Diogo, Karlsson, Anders, Karlsson, Roger, Kauppinen, Seth, Kellogg, Colleen T. E., Kennedy, Suzanne J., Kerkhof, Lee J., King, Gary M., Kling, George W., Koehler, Anson V., Krezalek, Monika, Kueneman, Jordan, Lamendella, Regina, Landon, Emily M., Lane-deGraaf, Kelly, LaRoche, Julie, Larsen, Peter, Laverock, Bonnie, Lax, Simon, Lentino, Miguel, Levin, Iris I., Liancourt, Pierre, Liang, Wenju, Linz, Alexandra M., Lipson, David A., Liu, Yongqin, Lladser, Manuel E., Lozada, Mariana, Spirito, Catherine M., MacCormack, Walter P., MacRae-Crerar, Aurora, Magris, Magda, Martín-Platero, Antonio M., Martín-Vivaldi, Manuel, Martínez, L. Margarita, Martínez-Bueno, Manuel, Marzinelli, Ezequiel M., Mason, Olivia U., Mayer, Gregory D., McDevitt-Irwin, Jamie M., McDonald, James E., McGuire, Krista L., McMahon, Katherine D., McMinds, Ryan, Medina, Mónica, Mendelson, Joseph R., Metcalf, Jessica L., Meyer, Folker, Michelangeli, Fabian, Miller, Kim, Mills, David A., Minich, Jeremiah, Mocali, Stefano, Moitinho-Silva, Lucas, Moore, Anni, Morgan-Kiss, Rachael M., Munroe, Paul, Myrold, David, Neufeld, Josh D., Ni, Yingying, Nicol, Graeme W., Nielsen, Shaun, Nissimov, Jozef I., Niu, Kefeng, Nolan, Matthew J., Noyce, Karen, O'Brien, Sarah L., Okamoto, Noriko, Orlando, Ludovic, Castellano, Yadira Ortiz, Osuolale, Olayinka, Oswald, Wyatt, Parnell, Jacob, Peralta-Sánchez, Juan M., Petraitis, Peter, Pfister, Catherine, Pilon-Smits, Elizabeth, Piombino, Paola, Pointing, Stephen B., Pollock, F. Joseph, Potter, Caitlin, Prithiviraj, Bharath, Quince, Christopher, Rani, Asha, Ranjan, Ravi, Rao, Subramanya, Rees, Andrew P., Richardson, Miles, Riebesell, Ulf, Robinson, Carol, Rockne, Karl J., Rodriguezl, Selena Marie, Rohwer, Forest, Roundstone, Wayne, Safran, Rebecca J., Sangwan, Naseer, Sanz, Virginia, Schrenk, Matthew, Schrenzel, Mark D., Scott, Nicole M., Seger, Rita L., Seguin-Orlando, Andaine, Seldin, Lucy, Seyler, Lauren M., Shakhsheer, Baddr, Sheets, Gabriela M., Shen, Congcong, Shi, Yu, Shin, Hakdong, Shogan, Benjamin D., Shutler, Dave, Siegel, Jeffrey, Simmons, Steve, Sjöling, Sara, Smith, Daniel P., Soler, Juan J., Sperling, Martin, Steinberg, Peter D., Stephens, Brent, Stevens, Melita A., Taghavi, Safiyh, Tai, Vera, Tait, Karen, Tan, Chia L., Tas, Neslihan, Taylor, D. Lee, Thomas, Torsten, Timling, Ina, Turner, Benjamin L., Urich, Tim, Ursell, Luke K., van der Lelie, Daniel, Van Treuren, William, van Zwieten, Lukas, Vargas-Robles, Daniela, Thurber, Rebecca Vega, Vitaglione, Paola, Walker, Donald A., Walters, William A., Wang, Shi, Wang, Tao, Weaver, Tom, Webster, Nicole S., Wehrle, Beck, Weisenhorn, Pamela, Weiss, Sophie, Werner, Jeffrey J., West, Kristin, Whitehead, Andrew, Whitehead, Susan R., Whittingham, Linda A., Willerslev, Eske, Williams, Allison E., Wood, Stephen A., Woodhams, Douglas C., Yang, Yeqin, Zaneveld, Jesse, Zarraonaindia, Iratxe, Zhang, Qikun, Zhao, Hongxia, University of California [San Diego] (UC San Diego), University of California, University of Southern Mississippi (USM), NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML), National Oceanic and Atmospheric Administration (NOAA), Southwest Fisheries Science Center (SWFSC), NOAA National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)-National Oceanic and Atmospheric Administration (NOAA), University of California [San Francisco] (UCSF), Indiana University [Bloomington], Indiana University System, IBM Almaden Research Center [San Jose], IBM, Skaggs School of Pharmacy and Pharmaceutical Sciences [San Diego], University of California-University of California, Massachusetts Institute of Technology (MIT), Broad Institute of MIT and Harvard (BROAD INSTITUTE), Harvard Medical School [Boston] (HMS)-Massachusetts Institute of Technology (MIT)-Massachusetts General Hospital [Boston], Harvard University [Cambridge], The Pathogen and Microbiome Institute, Northern Arizona University [Flagstaff], Pacific Northwest National Laboratory (PNNL), Argonne National Laboratory [Lemont] (ANL), University of Illinois [Chicago] (UIC), University of Illinois System, University of Colorado [Boulder], University of Southern California (USC), University of Chicago, Michigan State University [East Lansing], Michigan State University System, Institut des Sciences de l'Evolution de Montpellier (UMR ISEM), École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre National de la Recherche Scientifique (CNRS)-Institut de recherche pour le développement [IRD] : UR226, Tieleman lab, Biological Sciences, Department of Food and Nutrition, Arctic Microbial Ecology, Thompson, Luke R., Sanders, Jon G., Mcdonald, Daniel, Amir, Amnon, Ladau, Joshua, Locey, Kenneth J., Prill, Robert J., Tripathi, Anupriya, Gibbons, Sean M., Ackermann, Gail, Navas-Molina, Jose A., Janssen, Stefan, Kopylova, Evguenia, Vázquez-Baeza, Yoshiki, González, Antonio, Morton, James T., Mirarab, Siavash, Xu, Zhenjiang Zech, Jiang, Lingjing, Haroon, Mohamed F., Kanbar, Jad, Zhu, Qiyun, Song, Se Jin, Kosciolek, Tomasz, Bokulich, Nicholas A., Lefler, Joshua, Brislawn, Colin J., Humphrey, Gregory, Owens, Sarah M., Hampton-Marcell, Jarrad, Berg-Lyons, Donna, Mckenzie, Valerie, Fierer, Noah, Fuhrman, Jed A., Clauset, Aaron, Stevens, Rick L., Shade, Ashley, Pollard, Katherine S., Goodwin, Kelly D., Jansson, Janet K., Gilbert, Jack A., Knight, Rob, Agosto Rivera, Jose L., Al-Moosawi, Lisa, Alverdy, John, Amato, Katherine R., Andras, Jason, Angenent, Largus T., Antonopoulos, Dionysios A., Apprill, Amy, Armitage, David, Ballantine, Kate, Bárta, Jiří, Baum, Julia K., Berry, Allison, Bhatnagar, Ashish, Bhatnagar, Monica, Biddle, Jennifer F., Bittner, Lucie, Boldgiv, Bazartseren, Bottos, Eric, Boyer, Donal M., Braun, Josephine, Brazelton, William, Brearley, Francis Q., Campbell, Alexandra H., Caporaso, J. Gregory, Cardona, Cesar, Carroll, Jolynn, Cary, S. Craig, Casper, Brenda B., Charles, Trevor C., Chu, Haiyan, Claar, Danielle C., Clark, Robert G., Clayton, Jonathan B., Clemente, Jose C., Cochran, Alyssa, Coleman, Maureen L., Collins, Gavin, Colwell, Rita R., Contreras, Mónica, Crary, Benjamin B., Creer, Simon, Cristol, Daniel A., Crump, Byron C., Cui, Duoying, Daly, Sarah E., Davalos, Liliana, Dawson, Russell D., Defazio, Jennifer, Delsuc, Frédéric, Dionisi, Hebe M., Dominguez-Bello, Maria Gloria, Dowell, Robin, Dubinsky, Eric A., Dunn, Peter O., Ercolini, Danilo, Espinoza, Robert E., Ezenwa, Vanessa, Fenner, Nathalie, Findlay, Helen S., Fleming, Irma D., Fogliano, Vincenzo, Forsman, Anna, Freeman, Chri, Friedman, Elliot S., Galindo, Giancarlo, Garcia, Liza, Garcia-Amado, Maria Alexandra, Garshelis, David, Gasser, Robin B., Gerdts, Gunnar, Gibson, Molly K., Gifford, Isaac, Gill, Ryan T., Giray, Tugrul, Gittel, Antje, Golyshin, Peter, Gong, Donglai, Grossart, Hans-Peter, Guyton, Kristina, Haig, Sarah-Jane, Hale, Vanessa, Hall, Ross Stephen, Hallam, Steven J., Handley, Kim M., Hasan, Nur A., Haydon, Shane R., Hickman, Jonathan E., Hidalgo, Glida, Hofmockel, Kirsten S., Hooker, Jeff, Hulth, Stefan, Hultman, Jenni, Hyde, Embriette, Ibáñez-Álamo, Juan Diego, Jastrow, Julie D., Jex, Aaron R., Johnson, L. Scott, Johnston, Eric R., Joseph, Stephen, Jurburg, Stephanie D., Jurelevicius, Diogo, Karlsson, Ander, Karlsson, Roger, Kauppinen, Seth, Kellogg, Colleen T. E., Kennedy, Suzanne J., Kerkhof, Lee J., King, Gary M., Kling, George W., Koehler, Anson V., Krezalek, Monika, Kueneman, Jordan, Lamendella, Regina, Landon, Emily M., Lanede Graaf, Kelly, Laroche, Julie, Larsen, Peter, Laverock, Bonnie, Lax, Simon, Lentino, Miguel, Levin, Iris I., Liancourt, Pierre, Liang, Wenju, Linz, Alexandra M., Lipson, David A., Liu, Yongqin, Lladser, Manuel E., Lozada, Mariana, Spirito, Catherine M., Maccormack, Walter P., MacRae-Crerar, Aurora, Magris, Magda, Martín-Platero, Antonio M., Martín-Vivaldi, Manuel, Martínez, L. Margarita, Martínez-Bueno, Manuel, Marzinelli, Ezequiel M., Mason, Olivia U., Mayer, Gregory D., McDevitt-Irwin, Jamie M., Mcdonald, James E., Mcguire, Krista L., Mcmahon, Katherine D., Mcminds, Ryan, Medina, Mónica, Mendelson, Joseph R., Metcalf, Jessica L., Meyer, Folker, Michelangeli, Fabian, Miller, Kim, Mills, David A., Minich, Jeremiah, Mocali, Stefano, Moitinho-Silva, Luca, Moore, Anni, Morgan-Kiss, Rachael M., Munroe, Paul, Myrold, David, Neufeld, Josh D., Ni, Yingying, Nicol, Graeme W., Nielsen, Shaun, Nissimov, Jozef I., Niu, Kefeng, Nolan, Matthew J., Noyce, Karen, O'Brien, Sarah L., Okamoto, Noriko, Orlando, Ludovic, Castellano, Yadira Ortiz, Osuolale, Olayinka, Oswald, Wyatt, Parnell, Jacob, Peralta-Sánchez, Juan M., Petraitis, Peter, Pfister, Catherine, Pilon-Smits, Elizabeth, Piombino, Paola, Pointing, Stephen B., Pollock, F. Joseph, Potter, Caitlin, Prithiviraj, Bharath, Quince, Christopher, Rani, Asha, Ranjan, Ravi, Rao, Subramanya, Rees, Andrew P., Richardson, Mile, Riebesell, Ulf, Robinson, Carol, Rockne, Karl J., Rodriguezl, Selena Marie, Rohwer, Forest, Roundstone, Wayne, Safran, Rebecca J., Sangwan, Naseer, Sanz, Virginia, Schrenk, Matthew, Schrenzel, Mark D., Scott, Nicole M., Seger, Rita L., Seguinorlando, Andaine, Seldin, Lucy, Seyler, Lauren M., Shakhsheer, Baddr, Sheets, Gabriela M., Shen, Congcong, Shi, Yu, Shin, Hakdong, Shogan, Benjamin D., Shutler, Dave, Siegel, Jeffrey, Simmons, Steve, Sjöling, Sara, Smith, Daniel P., Soler, Juan J., Sperling, Martin, Steinberg, Peter D., Stephens, Brent, Stevens, Melita A., Taghavi, Safiyh, Tai, Vera, Tait, Karen, Tan, Chia L., Taş, Neslihan, Taylor, D. Lee, Thomas, Torsten, Timling, Ina, Turner, Benjamin L., Urich, Tim, Ursell, Luke K., Van Der Lelie, Daniel, Van Treuren, William, Van Zwieten, Luka, Vargas-Robles, Daniela, Thurber, Rebecca Vega, Vitaglione, Paola, Walker, Donald A., Walters, William A., Wang, Shi, Wang, Tao, Weaver, Tom, Webster, Nicole S., Wehrle, Beck, Weisenhorn, Pamela, Weiss, Sophie, Werner, Jeffrey J., West, Kristin, Whitehead, Andrew, Whitehead, Susan R., Whittingham, Linda A., Willerslev, Eske, Williams, Allison E., Wood, Stephen A., Woodhams, Douglas C., Yang, Yeqin, Zaneveld, Jesse, Zarraonaindia, Iratxe, Zhang, Qikun, and Zhao, Hongxia

Subjects
MARINE BACTERIAL, 0301 basic medicine, Earth, Planet, Gene Dosage, Biodiversity, MESH: Plants, Geographic Mapping, OPERON COPY NUMBER, MESH: Gene Dosage, purl.org/becyt/ford/1 [https], RNA, Ribosomal, 16S, EARTH MICROBIOME PROJECT, MESH: Animals, MESH: Geographic Mapping, MESH: Earth, Planet, GENE-EXPRESSION, media_common, GLOBAL PATTERNS, Multidisciplinary, Ecology, Microbiota, Bacteriologie, GUT MICROBIOTA, 1184 Genetics, developmental biology, physiology, ARCHAEAL, Bacteriology, Host Pathogen Interaction & Diagnostics, Plants, MESH: RNA, Ribosomal, 16S, Food Quality and Design, MESH: Archaea, CIENCIAS NATURALES Y EXACTAS, MESH: Ecology, Rare biosphere, Otras Ciencias Biológicas, Ecology (disciplines), media_common.quotation_subject, CONSISTENT, 030106 microbiology, Context (language use), [SDV.BID]Life Sciences [q-bio]/Biodiversity, Biology, Article, MESH: Biodiversity, Ciencias Biológicas, 03 medical and health sciences, Microbial ecology, Animals, Humans, Life Science, MESH: Microbiota, Microbiome, purl.org/becyt/ford/1.6 [https], VLAG, Host Pathogen Interaction & Diagnostics, BACTERIAL DIVERSITY, MESH: Humans, SEQUENCES, Bacteria, Bacteriology, NESTEDNESS, 15. Life on land, RARE BIOSPHERE, Archaea, Data science, Host Pathogen Interactie & Diagnostiek, EVOLUTION, ONTOLOGY, AMPLICON SEQUENCING, MESH: Bacteria, 030104 developmental biology, Earth Microbiome Project, Bacteriologie, Host Pathogen Interactie & Diagnostiek, NESTEDNESS ANALYSIS, COMMUNITIES, MICROBIAL DIVERSITY, Diversity (politics)
Abstract

Our growing awareness of the microbial world's importance and diversity contrasts starkly with our limited understanding of its fundamental structure. Despite recent advances in DNA sequencing, a lack of standardized protocols and common analytical frameworks impedes comparisons among studies, hindering the development of global inferences about microbial life on Earth. Here we present a meta-analysis of microbial community samples collected by hundreds of researchers for the Earth Microbiome Project. Coordinated protocols and new analytical methods, particularly the use of exact sequences instead of clustered operational taxonomic units, enable bacterial and archaeal ribosomal RNA gene sequences to be followed across multiple studies and allow us to explore patterns of diversity at an unprecedented scale. The result is both a reference database giving global context to DNA sequence data and a framework for incorporating data from future studies, fostering increasingly complete characterization of Earth's microbial diversity. Fil: Thompson, Luke R.. University of California at San Diego; Estados Unidos. University of Southern Mississippi; Estados Unidos. National Oceanic and Atmospheric Administration; Estados Unidos Fil: Sanders, Jon G.. University of California at San Diego; Estados Unidos Fil: McDonald, Daniel. University of California at San Diego; Estados Unidos Fil: Amir, Amnon. University of California at San Diego; Estados Unidos Fil: Ladau, Joshua. University of California San Francisco; Estados Unidos Fil: Locey, Kenneth J.. Indiana University; Estados Unidos Fil: Prill, Robert J.. IBM Almaden Research Center; Estados Unidos Fil: Tripathi, Anupriya. University of California at San Diego; Estados Unidos Fil: Gibbons, Sean M.. Massachusetts Institute of Technology; Estados Unidos Fil: Ackermann, Gail. University of California San Diego; Estados Unidos Fil: Navas Molina, Jose A.. University of California at San Diego; Estados Unidos Fil: Janssen, Stefan. University of California at San Diego; Estados Unidos Fil: Kopylova, Evguenia. University of California at San Diego; Estados Unidos Fil: Vázquez Baeza, Yoshiki. University of California at San Diego; Estados Unidos Fil: González, Antonio. University of California at San Diego; Estados Unidos Fil: Morton, James T.. University of California at San Diego; Estados Unidos Fil: Mirarab, Siavash. University of California at San Diego; Estados Unidos Fil: Xu, Zhenjiang Zech. University of California at San Diego; Estados Unidos Fil: Jiang, Lingjing. University of California at San Diego; Estados Unidos Fil: Haroon, Mohamed F.. Harvard University; Estados Unidos Fil: Kanbar, Jad. University of California at San Diego; Estados Unidos Fil: Zhu, Qiyun. University of California at San Diego; Estados Unidos Fil: Song, Se Jin. University of California at San Diego; Estados Unidos Fil: Kosciolek, Tomasz. University of California at San Diego; Estados Unidos Fil: Bokulich, Nicholas A.. Northern Arizona University; Estados Unidos Fil: Lefler, Joshua. University of California at San Diego; Estados Unidos Fil: Brislawn, Colin J.. Earth and Biological Sciences Directorate; Estados Unidos Fil: Humphrey, Gregory. University of California at San Diego; Estados Unidos Fil: Owens, Sarah M.. Argonne National Laboratory; Estados Unidos Fil: Hampton Marcell, Jarrad. Argonne National Laboratory; Estados Unidos. University of Illinois at Chicago; Estados Unidos Fil: Berg Lyons, Donna. University of Colorado; Estados Unidos Fil: McKenzie, Valerie. University of Colorado; Estados Unidos Fil: Fierer, Noah. University of Colorado; Estados Unidos Fil: Fuhrman, Jed A.. University of Colorado; Estados Unidos Fil: Clauset, Aaron. University of Colorado; Estados Unidos Fil: Stevens, Rick L.. Argonne National Laboratory; Estados Unidos. University of Chicago; Estados Unidos Fil: Shade, Ashley. Michigan State University; Estados Unidos Fil: Pollard, Katherine S.. The Gladstone Institutes; Estados Unidos. University of California San Francisco; Estados Unidos Fil: Goodwin, Kelly D.. National Oceanic and Atmospheric Administration; Estados Unidos Fil: Jansson, Janet K.. Earth and Biological Sciences Directorate; Estados Unidos Fil: Gilbert, Jack A.. Argonne National Laboratory; Estados Unidos. University of Chicago; Estados Unidos Fil: Knight, Rob. University of California San Diego; Estados Unidos Fil: Dionisi, Hebe Monica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina Fil: Lozada, Mariana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina Fil: Mac Cormack, Walter Patricio. Universidad de Buenos Aires; Argentina. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina

Published
2017
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3. Decreased plant productivity resulting from plant group removal experiment constrains soil microbial functional diversity.

Author

Zhang, Ximei, Johnston, Eric R., Barberán, Albert, Ren, Yi, Lü, Xiaotao, and Han, Xingguo

Subjects
*PLANT productivity, *MICROORGANISMS, *MICROBIAL diversity, *BIODIVERSITY, *CARBON
Abstract

Anthropogenic environmental changes are accelerating the rate of biodiversity loss on Earth. Plant diversity loss is predicted to reduce soil microbial diversity primarily due to the decreased variety of carbon/energy resources. However, this intuitive hypothesis is supported by sparse empirical evidence, and most underlying mechanisms remain underexplored or obscure altogether. We constructed four diversity gradients (0-3) in a five-year plant functional group removal experiment in a steppe ecosystem in Inner Mongolia, China, and quantified microbial taxonomic and functional diversity with shotgun metagenome sequencing. The treatments had little effect on microbial taxonomic diversity, but were found to decrease functional gene diversity. However, the observed decrease in functional gene diversity was more attributable to a loss in plant productivity, rather than to the loss of any individual plant functional group per se. Reduced productivity limited fresh plant resources supplied to microorganisms, and thus, intensified the pressure of ecological filtering, favoring genes responsible for energy production/conversion, material transport/metabolism and amino acid recycling, and accordingly disfavored many genes with other functions. Furthermore, microbial respiration was correlated with the variation in functional composition but not taxonomic composition. Overall, the amount of carbon/energy resources driving microbial gene diversity was identified to be the critical linkage between above- and belowground communities, contrary to the traditional framework of linking plant clade/taxonomic diversity to microbial taxonomic diversity. [ABSTRACT FROM AUTHOR]

Published
2017
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4. Impact of Organic Carbon Electron Donors on Microbial Community Development under Iron- and Sulfate-Reducing Conditions.

Author

Kwon, Man Jae, O’Loughlin, Edward J., Boyanov, Maxim I., Brulc, Jennifer M., Johnston, Eric R., Kemner, Kenneth M., and Antonopoulos, Dionysios A.

Subjects
CARBON compounds, ELECTRON donors, MICROBIAL diversity, SULFATES, SEQUENCE analysis
Abstract

Although iron- and sulfate-reducing bacteria in subsurface environments have crucial roles in biogeochemical cycling of C, Fe, and S, how specific electron donors impact the compositional structure and activity of native iron- and/or sulfate-reducing communities is largely unknown. To understand this better, we created bicarbonate-buffered batch systems in duplicate with three different electron donors (acetate, lactate, or glucose) paired with ferrihydrite and sulfate as the electron acceptors and inoculated them with subsurface sediment as the microbial inoculum. Sulfate and ferrihydrite reduction occurred simultaneously and were faster with lactate than with acetate. 16S rRNA-based sequence analysis of the communities over time revealed that Desulfotomaculum was the major driver for sulfate reduction coupled with propionate oxidation in lactate-amended incubations. The reduction of sulfate resulted in sulfide production and subsequent abiotic reduction of ferrihydrite. In contrast, glucose promoted faster reduction of ferrihydrite, but without reduction of sulfate. Interestingly, the glucose-amended incubations led to two different biogeochemical trajectories among replicate bottles that resulted in distinct coloration (white and brown). The two outcomes in geochemical evolution might be due to the stochastic evolution of the microbial communities or subtle differences in the initial composition of the fermenting microbial community and its development via the use of different glucose fermentation pathways available within the community. Synchrotron-based x-ray analysis indicated that siderite and amorphous Fe(II) were formed in the replicate bottles with glucose, while ferrous sulfide and vivianite were formed with lactate or acetate. These data sets reveal that use of different C utilization pathways projects significant changes in microbial community composition over time that uniquely impact both the geochemistry and mineralogy of subsurface environments. [ABSTRACT FROM AUTHOR]

Published
2016
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