Shallow water marine sediment bacterial community shifts along a natural CO2 gradient in the Mediterranean Sea Off vulcano, Italy

The effects of increasing atmospheric CO(2) on ocean ecosystems are a major environmental concern, as rapid shoaling of the carbonate saturation horizon is exposing vast areas of marine sediments to corrosive waters worldwide. Natural CO(2) gradients off Vulcano, Italy, have revealed profound ecosystem changes along rocky shore habitats as carbonate saturation levels decrease, but no investigations have yet been made of the sedimentary habitat. Here, we sampled the upper 2 cm of volcanic sand in three zones, ambient (median pCO(2) 419 µatm, minimum Omega (arag) 3.77), moderately CO(2)-enriched (median pCO(2) 592 µatm, minimum Omega (arag) 2.96), and highly CO(2)-enriched (median pCO(2) 1611 µatm, minimum Omega (arag) 0.35). We tested the hypothesis that increasing levels of seawater pCO(2) would cause significant shifts in sediment bacterial community composition, as shown recently in epilithic biofilms at the study site. In this study, 454 pyrosequencing of the V1 to V3 region of the 16S rRNA gene revealed a shift in community composition with increasing pCO(2). The relative abundances of most of the dominant genera were unaffected by the pCO(2) gradient, although there were significant differences for some 5 % of the genera present (viz. Georgenia, Lutibacter, Photobacterium, Acinetobacter, and Paenibacillus), and Shannon Diversity was greatest in sediments subject to long-term acidification (>100 years). Overall, this supports the view that globally increased ocean pCO(2) will be associated with changes in sediment bacterial community composition but that most of these organisms are resilient. However, further work is required to assess whether these results apply to other types of coastal sediments and whether the changes in relative abundance of bacterial taxa that we observed can significantly alter the biogeochemical functions of marine sediments.

Acuerdos de Juntas Generales, de este M.N. y M.L. Señorío de Vizcaya, celebrados en La Antigua de Guernica, los días dos, tres, quatro, cinco, seis, siete, y ocho, inclusive del mes de junio próximo pasado de este año de 1788.

Sign.: [ ]2, A-Z2, 2A-2K2

Standing together for reproducibility in large-scale computing: report on reproducibility@XSEDE

This is the final report on reproducibility@xsede, a one-day workshop held in conjunction with XSEDE14, the annual conference of the Extreme Science and Engineering Discovery Environment (XSEDE). The workshop's discussion-oriented agenda focused on reproducibility in large-scale computational research. Two important themes capture the spirit of the workshop submissions and discussions: (1) organizational stakeholders, especially supercomputer centers, are in a unique position to promote, enable, and support reproducible research; and (2) individual researchers should conduct each experiment as though someone will replicate that experiment. Participants documented numerous issues, questions, technologies, practices, and potentially promising initiatives emerging from the discussion, but also highlighted four areas of particular interest to XSEDE: (1) documentation and training that promotes reproducible research; (2) system-level tools that provide build- and run-time information at the level of the individual job; (3) the need to model best practices in research collaborations involving XSEDE staff; and (4) continued work on gateways and related technologies. In addition, an intriguing question emerged from the day's interactions: would there be value in establishing an annual award for excellence in reproducible research? Overview

[Tercer siglo de la canonizacion de S. Vicente Ferrer] [Material gráfico]

Inscripción: "Siglo tercero de la canonización del apóstol de Europa"

Manifiesto que hizo a... Carlos 3º en 30 de Septiembre de 1788, sobre lo mui combeniente que seria la creación de un tribunal... y Audiencia de todas las causas de Tercias Reales de las dos Castillas con inclusión de las Andalucias... [Manuscrito]

Incipit : "Señor D. Francisco Rojo, Archivero... del Marqués de Valdecanzana..."

València (Reino). Mapas generales. 1788

Larga nota bibliográfica dando cuenta de los documentos que se han tenido en cuenta para la confección de este mapa

Para que las justicias de los pueblos de este reyno formen con la uniformidad y acierto que corresponde los estados de frutos y manufacturas de este presente año de 1788 que debe remitirse en cada uno a esta Intendencia... [Texto impreso]

Texto firmado por, Pedro Francisco de Pueyo

...Scientific results of the cruises of the yachts "Eagle" and "Ara", 1921-1928, William K. Vanderbilt, commanding. Crustacea... By Lee Boone.

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...Scientific results of the cruises of the yachts "Eagle" and "Ara", 1921-1928, William K. Vanderbilt, commanding. Crustacea... By Lee Boone.

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