Catálogo de publicaciones - revistas

<jats:p>Ratajczak and Nippert note that transient states between treeless and savanna states are more common than between savanna and forest, and suggest that this can be explained by a slower rate of change in the intermediate conditions at drier sites. We show that probability distributions of tree cover rather reflect the interplay between intrinsic rates of change and perturbation regimes.</jats:p>

<jats:p> Hirota <jats:italic>et al</jats:italic> . (Reports, 14 October 2011, p. 232) used spatial data to show that grasslands, savannas, and forests represent opposing stable states. Reanalyzing their data and drawing from temporal studies, we argue that spatial analyses underestimate the bistability of grasslands and savannas due to limitations of substituting space for time. We propose that temporal and spatial data are needed to predict critical transitions between grasslands and savannas. </jats:p>

<jats:p>These 24 essays offer a diverse sample of place-based ecocriticism and its approaches to writing, reading, teaching, and understanding literature and science.</jats:p>

<jats:p>Through unconventional environmental perspectives on nine familiar episodes in U.S. history, Fiege demonstrates the importance of the natural world for understanding the past.</jats:p>

<jats:p> A <jats:ext-link xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="uri" xlink:href="http://www.sciencemag.org/site/feature/data/books/brl6081.xhtml">listing of books received</jats:ext-link> at <jats:italic>Science</jats:italic> during the week ending 27 April 2012. </jats:p>

<jats:p>Human subjects research ethics needs to directly address threats to the evidence base of the medical information economy.</jats:p>

<jats:p>Highly localized activity of ion channels in vascular endothelial cells controls the contraction of surrounding muscle cells and blood flow.</jats:p>

<jats:p>The frustrated ordering of dipoles created by copper and antimony ions in an oxide material may help to create an exotic quantum electronic state.</jats:p>

<jats:p>Observations by Venus Express suggest that the magnetic tails of Venus and, by implication, comets may be more dynamic than originally thought.</jats:p>

<jats:p>More accurate projections of regional sea levels are needed to inform adaptation and mitigation planning.</jats:p>