Catálogo de publicaciones - revistas

<jats:title>A general scaling law for ecology</jats:title> <jats:p> Despite the huge diversity of ecological communities, they can have unexpected patterns in common. Hatton <jats:italic>et al.</jats:italic> describe a general scaling law that relates total predator and prey biomass in terrestrial and aquatic animal communities (see the Perspective by Cebrian). They draw on data from many thousands of population counts of animal communities ranging from plankton to large mammals, across a wide range of biomes. They find a ubiquitous pattern of biomass scaling, which may suggest an underlying organization in ecosystems. It seems that communities follow systematic changes in structure and dynamics across environmental gradients. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue <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.aac6284">10.1126/science.aac6284</jats:related-article> ; see also p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6252" page="1053" related-article-type="in-this-issue" vol="349" xlink:href="10.1126/science.aad0684">1053</jats:related-article> </jats:p>

<jats:title>Bringing ecology to infection</jats:title> <jats:p> The tools we use to investigate infectious diseases tend to focus on specific one-host–one-pathogen relationships, but pathogens often have complex life cycles involving many hosts. Johnson <jats:italic>et al.</jats:italic> review how such complexity is analyzed by community ecologists. Ecologists have the investigative tools to probe cause and effect relationships that change with spatial scale in multispecies communities. These techniques are used to monitor the ways in which communities change through time and to probe the heterogeneity that characterizes individuals, species, and assemblages—all issues that are also essential for disease specialists to understand. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue <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.1259504">10.1126/science.1259504</jats:related-article> </jats:p>

<jats:title>Neutrophils lay down the tracks</jats:title> <jats:p> T cells constantly circulate throughout the body until an invading pathogen calls them into action. Microbes often cause localized infections, so how do T cells know where to go? Lim <jats:italic>et al.</jats:italic> explore this question in a mouse model of influenza infection and find that immune cells called neutrophils help guide the way (see the Perspective by Kiermaier and Sixt). Upon infection, neutrophils quickly traffic to the trachea. There, they lay down “tracks” enriched in proteins called chemokines, especially the chemokine CXCL12, which guide CD8 <jats:sup>+</jats:sup> T cells to the infected organ. Mice whose neutrophils could not lay down such tracks exhibited defects in CD8 <jats:sup>+</jats:sup> T cell recruitment and viral clearance. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue <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.aaa4352">10.1126/science.aaa4352</jats:related-article> ; see also p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6252" page="1055" related-article-type="in-this-issue" vol="349" xlink:href="10.1126/science.aad0867">1055</jats:related-article> </jats:p>

<jats:p>More than 35 years since its revolution, Iran is embarking on a new era of international interaction and cooperation. On the road to becoming a nation with scientific clout, Iran takes the role of science for peace, progress, and dialogue very seriously.</jats:p>

<jats:p>A roundup of weekly science policy and related news.</jats:p>

<jats:p>Fat tubes of hot rock could alter views of how the planet cools.</jats:p>