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Alkaline, salty;
Plants hate bauxite residue. Soil, it must become. Talitha Santini University of Western Australia Thesis title: ‘A pedogenic treatment for bauxite residue mud’ My PhD aimed to identify the best treatments for remediating bauxite residue mud (also known as ‘red mud’, which is basically the leftovers after processing aluminium ore) deposits so that the residue approaches something like a natural soil and can support a plant cover. Where, oh where, is brome?
Can you tell from this image? Better check the ground. Laura Horner University of Redlands, MS Title: Identifying Annual Brome Within Joshua Tree National Park I used remote-sensing techniques to produce maps of potential annual brome presence in Joshua Tree National Park in order to support land management and fire mitigation efforts. Annual brome is a non-native invasive grass that prevents the growth of native plants and serves as a highly flammable fuel that increases the frequency and scale of devastating wildfire. Los ciénegas –
how can they withstand big floods? Plants protect stream beds James B. Heffernan Arizona State University Dissertation Title: Wetlands as an alternative stable state in desert streams My dissertation evaluated the process of wetland formation in desert streams in the context of alternative stable state theory (‘tipping points’), and demonstrated that plants, at sufficient density, can stabilize desert stream channels and allow the development and persistence of wetlands (ciénegas). Marine microbes eat
polysaccharides, except that sometimes they don’t. Andrew D. Steen University of North Carolina at Chapel Hill I measured the rates at which dissolved polysaccharides are degraded by microbes in seawater. Differences in those rates among locations suggest that the reactivity of dissolved organic matter in seawater is determined by the nature of the microbial community as well as the chemical characteristics of organic matter. If seawater microbial communities in the Arctic Ocean begin to access a wider range of dissolved organic molecules as temperatures warm in the future, more organic matter may be converted to carbon dioxide in the Arctic Ocean. vertical motion
ice cloud particles growing falling. falling. gone! Jennifer E. Kay University of Washington Forests primeval
Swarmed with evolving critters. These things breed like mice! Anne Walton Southern Methodist University My dissertation was “Rodents of the La Venta fauna, Miocene, Colombia: biostratigraphy and paleoenvironmental implications.” Using screenwashing and surface collection, we found abundant and diverse fossil rodents, including several new species, and measurable turnover through the section. All belong to clades indigenous to South America, with no indication of interchange with North America as of 12 million years ago. |
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Janine Allwright
Graduate Student Walden University Public Policy and Public Administration Archives
December 2016
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