A new study conducted in the Hawaiian Islands has revealed that landscape and erosion play crucial roles in determining soil fertility in tropical ecosystems.
"This study is the first to accurately predict the distribution of nutrients across a complex tropical forest landscape, and then to detect these shifts in nutrient status using airborne sensors," says Stanford University graduate student Stephen Porder, lead author of the study, which will be published in this weeks online edition of the Proceedings of the National Academy of Sciences (PNAS).
Porders co-authors are Carnegie Institution scientist Gregory P. Asner, an assistant professor (by courtesy) of geological and environmental sciences at Stanford; and Peter M. Vitousek, the Clifford G. Morrison Professor in Population and Resource Studies at Stanford. "Tropical soils often are assumed to be highly weathered and thus nutrient depleted," the authors write. But the study, which focused on the island of Kauai, revealed a complex "biogeochemical patchwork with almost equal areas of high and low nutrient availability."
Mark Shwartz | EurekAlert!
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10.02.2017 | Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung
In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport
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The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.
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Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".
Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...
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