Catálogo de publicaciones - revistas

<jats:p> Ballard <jats:italic>et al</jats:italic> . argue that our prediction of a 30-year or longer recovery time for Gulf of Mexico water quality is highly uncertain, and that much shorter time lags are equally likely. We demonstrate that their argument, based on the use of a two-component regression model, does not sufficiently consider fundamental watershed processes or multiple lines of evidence suggesting the existence of decadal-scale lags. </jats:p>

<jats:title>Microbes' role in soil decomposition</jats:title> <jats:p> Soils harbor a rich diversity of invertebrate and microbial life, which drives biogeochemical processes from local to global scales. Relating the biodiversity patterns of soil ecological communities to soil biogeochemistry remains an important challenge for ecologists and earth system modelers. Crowther <jats:italic>et al.</jats:italic> review the state of science relating soil organisms to biogeochemical processes, focusing particularly on the importance of microbial community variation on decomposition and turnover of soil organic matter. Although there is variation in soil communities across the globe, ecologists are beginning to identify general patterns that may contribute to predicting biogeochemical dynamics under future climate change. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" related-article-type="in-this-issue" xlink:href="10.1126/science.aav0550">eaav0550</jats:related-article> </jats:p>

<jats:title>Mapping the malaria parasite</jats:title> <jats:p> Several species of the parasite <jats:italic>Plasmodium</jats:italic> cause human malarial diseases, and, despite determined control efforts, a huge global disease burden remains. Howick <jats:italic>et al.</jats:italic> present a single-cell analysis of transcription across the malaria parasite life cycle (see the Perspective by Winzeler). Single-cell transcriptomes generated from 10 different life-cycle stages of the rodent-model malaria parasite <jats:italic>P. berghei</jats:italic> identified 20 “modules” among 5156 core transcriptome genes. These clusters enabled functional assignment of hypothetical and conserved genes, and they hint at further substructure of established life-cycle stages. The atlas also allowed for <jats:italic>P. falciparum</jats:italic> and <jats:italic>P. malariae</jats:italic> transcriptomes from patient isolates to be deconvoluted and for classification of parasitemia according to developmental stage. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" related-article-type="in-this-issue" xlink:href="10.1126/science.aaw2619">eaaw2619</jats:related-article> ; see also p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6455" page="753" related-article-type="in-this-issue" vol="365" xlink:href="10.1126/science.aay5963">753</jats:related-article> </jats:p>

<jats:title>Innovations in an ATPase/ATP synthase</jats:title> <jats:p> Enzymes that couple the chemical energy of adenosine triphosphate (ATP) to movement of ions across a membrane are present in all domains of life. Like their F-type cousins in mitochondria, chloroplasts, and most bacteria, vacuolar/archaeal (V/A-type) ATPases couple synthesis or hydrolysis of ATP to movement of protons across the membrane. To uncover mechanistic differences in energy coupling between F- and V/A-type enzymes, Zhou and Sazanov determined structures of a V/A-type ATP synthase from the bacterium <jats:italic>Thermus thermophilus.</jats:italic> With structures of multiple substates visible, the domain interfaces are made clear and a role for the elastic peripheral stalks is apparent in coupling rotational energy from V <jats:sub>o</jats:sub> into the ATP-synthesizing V <jats:sub>1</jats:sub> domain. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" related-article-type="in-this-issue" xlink:href="10.1126/science.aaw9144">eaaw9144</jats:related-article> </jats:p>

<jats:p> Van Meter <jats:italic>et al</jats:italic> . (Reports, 27 April 2018, p. 427) warn that achieving nitrogen reduction goals in the Gulf of Mexico will take decades as a result of legacy nitrogen effects. We discuss limitations of the modeling approach and demonstrate that legacy effects ranging from a few years to decades are equally consistent with observations. The presented time scales for system recovery are therefore highly uncertain. </jats:p>