<div><br></div><div><div class="gmail_quote"><div dir="ltr"><div class="gmail_default" style="font-family:tahoma,sans-serif"><div class="gmail_default"><div class="gmail_default"><div class="gmail_default"><div class="gmail_default"><div class="gmail_default"><div class="gmail_default"><div class="gmail_default"><div class="gmail_default"><div class="gmail_default"><div class="gmail_default"><table cellspacing="0" cellpadding="0" width="100%" bgcolor="#474444" style="font-family:Arial,Helvetica,sans-serif"><tbody><tr><td valign="top"><table cellspacing="0" cellpadding="0" width="600" align="center" border="0" style="width:600px;margin:0px auto"><tbody><tr><th style="border-width:medium;border-style:none;border-color:initial;width:600px;font-weight:normal;padding:0px;text-align:left;background-color:rgb(254,251,251)"><table cellspacing="0" cellpadding="0" align="left" style="width:600px"><tbody><tr height="44" style="height:44px"><th style="border-width:medium;border-style:none;border-color:initial;width:477px;vertical-align:middle;font-weight:normal;padding:10px 0px 0px 10px;text-align:left;background-color:rgb(66,176,91)"><p align="left" style="margin-bottom:1em;font-size:14px;font-family:tahoma,geneva,sans-serif;color:rgb(253,251,251);margin-top:0px;line-height:18px;background-color:transparent"><strong> <span>Seminario</span> <span>IFEVA</span></strong></p></th><th style="border-width:medium;border-style:none;border-color:initial;width:103px;vertical-align:middle;font-weight:normal;padding:0px 5px;text-align:left;background-color:transparent"><div style="padding:10px;text-align:right"><table cellspacing="0" cellpadding="0" border="0" style="display:inline-block"><tbody><tr><td style="padding-right:5px"><a href="https://twitter.com/ifevaok?ref_src=twsrc%5Etfw%7Ctwcamp%5Eembeddedtimeline%7Ctwterm%5Eprofile%3Aifevaok&ref_url=http%3A%2F%2Fwww.ifeva.edu.ar%2Findex.tw.html" rel="noreferrer noreferrer" target="_blank"><img title="Twitter" alt="Twitter" src="https://mailchef.s3.amazonaws.com/uploads/mailstyler/images/478A2A14-0536-35C1-A7E4-6A014235947D_Image_1_9f1117f4-4654-4d62-878f-885c62b8fa59.png" width="24" style="border-width:medium;border-style:none;border-color:initial;display:block"></a></td><td style="padding-right:5px"><a href="https://www.youtube.com/channel/UCCC_QmqL9yuKBnZ6p4mnxBw" rel="noreferrer noreferrer" target="_blank"><img title="Youtube" alt="Youtube" src="https://mailchef.s3.amazonaws.com/uploads/mailstyler/images/8EF10070-9897-5A56-C849-AF5EF89AEA87_Image_2_e946f5fa-93af-4d25-972f-4211dca72430.png" width="24" style="border-width:medium;border-style:none;border-color:initial;display:block"></a></td><td><a href="https://www.instagram.com/ifevaok/" rel="noreferrer noreferrer" target="_blank"><img title="Instagram" alt="Instagram" src="https://mailchef.s3.amazonaws.com/uploads/mailstyler/images/371C7FF9-A40B-509F-8253-F6AC579686D2_Image_3_79b8ac76-96a9-425d-adfc-620fc1609bf9.png" width="24" style="border-width:medium;border-style:none;border-color:initial;display:block"></a></td></tr></tbody></table></div></th></tr></tbody></table></th></tr><tr><th style="border-width:medium;border-style:none;border-color:initial;width:580px;font-weight:normal;padding:0px 20px 0px 0px;text-align:left;background-color:rgb(254,251,251)"><table cellspacing="0" cellpadding="0" align="left" style="width:580px"><tbody><tr height="92" style="height:92px"><th style="border-width:medium;border-style:none;border-color:initial;width:580px;vertical-align:middle;font-weight:normal;padding:0px;text-align:left;background-color:transparent"><table cellspacing="0" cellpadding="0" align="center" border="0" style="margin:0px auto"><tbody><tr><td align="center" style="padding:0px"><table cellspacing="0" cellpadding="0" border="0"><tbody><tr><td style="border-width:medium;border-style:none;border-color:initial;background-color:transparent"><img alt="" src="https://mailchef.s3.amazonaws.com/uploads/mailstyler/images/152EFEE1-9961-67DB-42C9-BDFED3ECD20D_Image_4_2f0431fb-1968-435e-bed4-e7fa8fc21754.png" width="570" hspace="0" vspace="0" style="border-width:medium;border-style:none;border-color:initial;display:block"></td></tr></tbody></table></td></tr></tbody></table></th></tr></tbody></table></th></tr><tr><th style="border-width:medium;border-style:none;border-color:initial;width:600px;font-weight:normal;padding:0px;text-align:left;background-color:rgb(254,251,251)"><table cellspacing="0" cellpadding="0" align="left" style="width:600px"><tbody><tr height="76" style="height:76px"><th style="border-width:medium;border-style:none;border-color:initial;width:326px;vertical-align:middle;font-weight:normal;padding:10px 10px 0px 20px;text-align:left;background-color:rgb(243,54,62)"><p align="left" style="margin-bottom:1em;font-size:14px;font-family:tahoma,geneva,sans-serif;color:rgb(253,251,251);margin-top:0px;line-height:18px;background-color:transparent"><strong>VIERNES<br>4 DE OCTUBRE 2024<br>12:00 hs</strong></p></th><th style="border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><span style="color:rgb(66,176,91)">Resumen: </span></strong></font><span style="font-weight:normal"> </span><font size="4"><span style="font-weight:normal">An emergent property of biological communities is the capacity to maintain equilibrium in response to </span><span style="font-weight:normal">ecological disruption by preventing ecosystem transitions (resistance) or rebounding from it (resilience). </span><span style="font-weight:normal">Human activities are transforming the structure and composition of earth’s ecosystems through the </span><span style="font-weight:normal">introduction and spread of invasive species and the creation of novel disturbance and climate regimes that </span><span style="font-weight:normal">are pushing ecosystems beyond critical resistance and resilience thresholds. This can lead to alternative </span><span style="font-weight:normal">ecological states resulting in losses of biodiversity and ecosystem services. A significant limitation in our current understanding of state and transition theory is the complexity of trophic interactions within </span><span style="font-weight:normal">biological communities that underlie ecosystem resilience, and synergies among global change factors </span><span style="font-weight:normal">that erode it. I present evidence from long-term study plots across deserts of North America that </span><span style="font-weight:normal">consumer communities are critical control points in resilience against state transitions (ie. annual grass </span><span style="font-weight:normal">invasion and woody encroachment) via seed predation and seedling herbivory and by creating trophic </span><span style="font-weight:normal">cascades involving plant-soil feedbacks (see conceptual model below). The seminar further investigates </span><span style="font-weight:normal">how novel fire regimes and extreme drought events may uncouple trophic interactions underlying biotic </span><span style="font-weight:normal">resistance to state change in dryland ecosystems.</span></font></p><img src="cid:ii_m1qqo2ue1" alt="94e17213-8add-4a6c-bf4e-99dedb7aab5c.png" style="width:852px;max-width:100%"><br><p class="MsoNormal" style="margin:0cm 0cm 10pt"><span style="background-color:transparent;text-indent:1.25cm;font-family:arial,sans-serif"><font size="4"><font color="#42b05b">palabras clave:</font><span style="color:rgb(66,176,91);font-weight:normal"> </span><span style="font-weight:normal"><font color="#000000">Communities, Consumers, Droughts, Fires, Herbivory Resistance, Resilience.</font></span></font></span><br></p></th></tr></tbody></table></th></tr><tr><th style="border-width:medium;border-style:none;border-color:initial;width:600px;font-weight:normal;padding:5px 0px;text-align:left;background-color:rgb(253,251,251)"><table cellspacing="0" cellpadding="0" align="left" style="width:600px"><tbody><tr height="163" style="height:163px"><th style="border-width:medium;border-style:none;border-color:initial;width:140px;vertical-align:top;padding:5px;text-align:left;background-color:transparent"><img src="cid:ii_m1qvziks1" alt="Screenshot 2024-10-01 at 3.57.14 PM.png" style="width:852px;max-width:100%"><br></th><th style="border-width:medium;border-style:none;border-color:initial;width:440px;vertical-align:top;padding:5px;text-align:left"><i>Dr. Sam St. Clair</i><span style="font-weight:normal"> is a professor of ecology from the US studying the interactions of herbivory, wildfire and drought in patterns of invasion and woody encroachment in dryland ecosystems, and regeneration and recruitment in forest ecosystems of North America. He is on sabbatical in 2024 visiting research labs in Europe and South America to develop research networks to better understand and manage for ecosystem resilience in dryland and forest ecosystems. He is currently writing a National Science Foundation grant proposal to develop this network and is interested in talking to anyone that is interested in knowing more.</span><span style="font-weight:normal;background-color:rgb(255,255,255);font-family:tahoma,sans-serif"> </span><p style="margin-bottom:0.21cm;line-height:19.5px;direction:ltr"></p><p style="margin-bottom:0.21cm;line-height:19.5px;direction:ltr"></p></th></tr></tbody></table></th></tr><tr><th style="border-width:medium;border-style:none;border-color:initial;width:600px;font-weight:normal;padding:0px;text-align:left;background-color:rgb(229,229,229)"><table cellspacing="0" cellpadding="0" align="left" style="width:600px"><tbody><tr height="93" style="height:93px"><th style="border-width:medium;border-style:none;border-color:initial;width:570px;vertical-align:middle;padding:10px 10px 0px 20px;text-align:left;background-color:transparent"><span style="font-weight:normal">Certificados: </span><span style="background-color:transparent"><span style="font-weight:normal">los alumnos que necesiten certificar su asistencia, deberán enviar </span></span><span style="font-weight:normal;background-color:transparent;color:rgb(56,56,56);font-family:verdana,arial,helvetica,sans-serif">su nombre y DNI</span><span class="gmail_default" style="font-weight:normal;background-color:transparent;color:rgb(56,56,56);font-family:tahoma,sans-serif"> </span><span class="gmail_default" style="background-color:transparent;color:rgb(56,56,56);font-family:tahoma,sans-serif"><span style="font-weight:normal">al moderador (</span><a href="mailto:mtexeira@agro.uba.ar" rel="noreferrer noreferrer" style="font-weight:normal" target="_blank">mtexeira@agro.uba.ar</a><span style="font-weight:normal">) </span>durante el transcurso del <span>seminario</span> o dentro de la hora posterior a la finalización del mismo</span><span style="font-weight:normal;background-color:transparent;color:rgb(56,56,56);font-family:verdana,arial,helvetica,sans-serif">. </span><br></th></tr></tbody></table></th></tr><tr><th style="border-width:medium;border-style:none;border-color:initial;width:600px;font-weight:normal;padding:0px;text-align:left;background-color:rgb(66,176,91)"><table cellspacing="0" cellpadding="0" align="left" style="width:600px"><tbody><tr height="62" style="height:62px"><th style="border-width:medium;border-style:none;border-color:initial;width:560px;vertical-align:top;font-weight:normal;padding:25px 20px 10px;text-align:left;background-color:transparent"><p align="center" style="margin-bottom:1em;font-size:12px;font-family:tahoma,geneva,sans-serif;color:rgb(9,9,9);text-align:center;margin-top:0px;line-height:15px;background-color:transparent"><strong><span style="color:rgb(255,255,255)">Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura</span></strong></p></th></tr></tbody></table></th></tr><tr><th style="border-width:medium;border-style:none;border-color:initial;width:600px;font-weight:normal;padding:1px 0px;text-align:left;background-color:transparent"><table cellspacing="0" cellpadding="0" align="left" style="width:600px"><tbody><tr height="66" style="height:66px"><th style="border-width:medium;border-style:none;border-color:initial;width:590px;vertical-align:middle;font-weight:normal;padding:5px;text-align:left;background-color:transparent"><p align="center" style="margin-bottom:1em;font-size:12px;font-family:tahoma,geneva,sans-serif;color:rgb(253,251,251);text-align:center;margin-top:0px;line-height:15px;background-color:transparent"><br><span>IFEVA</span> - Facultad de Agronomía - Universidad de Buenos Aires<br> <a href="https://www.google.com/maps/search/Av.+San+Mart%C3%ADn+4453?entry=gmail&source=g">Av. San Martín 4453</a> - C1417DSE - Buenos Aires - Argentina</p></th></tr></tbody></table></th></tr></tbody></table></td></tr><tr><td style="font-size:0px;height:8px;line-height:0"> </td></tr></tbody></table></div></div></div></div></div></div></div></div></div></div><div style="font-family:Arial,Helvetica,sans-serif">--<br></div></div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div>Marcos Texeira<br>Departamento de Métodos Cuantitativos y Sistemas de Información //  <br>LART - IFEVA - CONICET<br>(011) 52870829</div><div>Facultad de Agronomía<br>Universidad de Buenos Aires</div><div><span><a href="https://www.google.com/maps/search/Av.+San+Mart%C3%ADn+4453?entry=gmail&source=g">Av. San Martín 4453</a> (C1417DSE)<br></span></div></div></div></div>
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