<div dir="ltr"><div class="gmail_quote"><br><div dir="ltr"><div dir="ltr"><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><p class="MsoNormal" style="margin:0px;color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><span style="color:rgb(34,34,34)"><img src="cid:ii_16161d9ee2cc0d99" alt="Inline image 1" width="338" height="89" style="margin-right:0px"><br></span></p><p class="MsoNormal" style="margin:0px;color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><span style="color:rgb(34,34,34)">Hello Everyone,<u></u><u></u></span></p><p class="MsoNormal" style="margin:0px;color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><span style="color:rgb(34,34,34)">Please join us for a talk<span> </span><b>today </b>by Professor Teamrat A. Ghezzehei, 12-1pm in Room SE2-302.</span></p><br></div><div style="text-align:center;color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><b style="font-family:-apple-system,BlinkMacSystemFont,sans-serif;font-size:14px">Biophysical Model of Soil Aggregation: from root residues to microbial and physical hotspots</b><br></div></div><div class="gmail_quote"><div><div name="messageBodySection" style="font-size:14px;font-family:-apple-system,BlinkMacSystemFont,sans-serif">
<div style="text-align:center">Professor Teamrat A. Ghezzehei, UC Merced</div>
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</div><div style="text-align:center"><div style="text-align:center;color:rgb(34,34,34);font-family:-apple-system,system-ui,sans-serif;font-size:14px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;letter-spacing:normal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><b>Abstract:</b><span style="font-weight:400"> Soil aggregation plays important role in storage and movement of water and essential gases, nutrient cycling, and ultimately supporting microbial and plant life. Microhabitats within aggregates have been shown to support the greatest microbial diversity as well. It is one of the most dynamic and sensitive soil qualities, which readily responds to disturbances such as cultivation, fire, drought, flooding, and changes in vegetation. Soil aggregation that is primarily controlled by organic matter generally exhibits hierarchical organization of soil constituents into stable units that range in size from a few microns to centimeters. However, this conceptual model of soil aggregation as the key unifying mechanism remains poorly quantified and is rarely included in predictive soil models. Here we introduce a biophysical framework for modeling soil aggregation from life cycle of individual aggregates to pedon- scale aggregation. Individual aggregates are treated as hotspots of biological, chemical and physical processes centered on roots and root residues. At the pedon scale, soil aggregation is primarily controlled by root architecture and hydration state. The framework synthesizes current understanding of microbial life in porous media; water holding and soil binding capacity of biopolymers; and environmental controls on soil organic matter dynamics. The framework paves a way for integration of processes that are presently modeled as disparate or poorly coupled processes, including storage and protection of carbon, microbial activity, greenhouse gas fluxes, movement and storage of water, resistance of soils against erosion.<br></span></div><div style="text-align:center;color:rgb(34,34,34);font-family:-apple-system,system-ui,sans-serif;font-size:14px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><br></div><div style="color:rgb(34,34,34);font-family:-apple-system,system-ui,sans-serif;font-size:14px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><p class="MsoNormal" style="text-align:center;margin:0px 0px 0.0001pt;line-height:normal"><span style="font-size:12pt;font-family:"Times New Roman",serif"><b>Bio: </b>Prof. Teamrat A. Ghezzehei is an Associate Professor of Environmental Soil Physics at the Life and Environmental Sciences unit at University of California, Merced. Dr. Ghezzehei was a Postdoctoral Fellow (2001-2004) and Geological Scientist (2004-2008) at the Earth Sciences Division, Lawrence Berkeley National Lab. Prior to that Dr. Ghezzehei received his Ph.D. in Soil Science from Utah State University and B. Sc. in Soil and Water Conservation from University of Asmara, Eritrea. Prof. Ghezzehei’s work focuses on physical transformations of soil structure across scales and the associated biophysical processes, including water and nutrient dynamics in the rhizosphere and soil aggregation. </span></p></div><br></div>
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<p class="MsoNormal" style="margin:0px;color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial"><span style="color:rgb(34,34,34)">When:<span> </span><b>May 3 Thursday, 12pm – 1pm</b><u></u><u></u></span></p><p class="MsoNormal" style="margin:0px;color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial"><span style="color:rgb(34,34,34)"> <u></u><u></u></span></p><p class="MsoNormal" style="margin:0px;color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial"><span style="color:rgb(34,34,34)">Where: SE2-302<u></u><u></u></span></p><p class="MsoNormal" style="margin:0px;color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial"><span style="color:rgb(34,34,34)"> <u></u><u></u></span></p><p class="MsoNormal" style="margin:0px;color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial"><span style="color:rgb(34,34,34)">Coffee will be provided, please bring your own mugs.<u></u><u></u></span></p><p class="MsoNormal" style="margin:0px;color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial"><span style="color:rgb(34,34,34)"> <u></u><u></u></span></p><p class="MsoNormal" style="margin:0px;color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial"><span style="color:rgb(34,34,34)">We look forward to seeing you,<u></u><u></u></span></p><p class="MsoNormal" style="margin:0px;color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial"><span style="color:rgb(34,34,34)"> <u></u><u></u></span></p><p class="MsoNormal" style="margin:0px;color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial"><span style="color:rgb(34,34,34)">Nate & Jing<u></u><u></u></span></p><p class="MsoNormal" style="margin:0px;color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial"><span style="color:rgb(34,34,34)"> <u></u><u></u></span></p><p class="MsoNormal" style="margin:0px;color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial"><span style="color:rgb(34,34,34)">Organizers for Spring 2018: Nate Bogie and Jing Yan<u></u><u></u></span></p><p class="MsoNormal" style="margin:0px;color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial"><span style="color:rgb(34,34,34)">Faculty coordinator: Asmeret Asefaw Berhe</span></p></div></div>

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