<div dir="ltr"><div class="gmail_quote"><div dir="ltr"><div style="font-family:tahoma,sans-serif"><div><div><div><div><br><table cellspacing="0" cellpadding="0" width="100%" bgcolor="#474444" style="font-family:Arial,Helvetica,sans-serif"><tbody><tr><td style="font-size:0px;height:33px;line-height:0"></td></tr><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 noreferrer noreferrer noreferrer noreferrer" target="_blank"><img title="Twitter" alt="Twitter" 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style="margin-bottom:1em;font-size:14px;color:rgb(253,251,251);margin-top:0px;line-height:18px;background-color:transparent"><strong><font face="tahoma, geneva, sans-serif">VIERNES</font><br><font face="tahoma, sans-serif">08</font><font face="tahoma, geneva, sans-serif"> de JULIO </font><font face="tahoma, sans-serif">2</font><font face="tahoma, geneva, sans-serif">022</font><br><font face="tahoma, geneva, sans-serif">12.00 hs</font></strong></p></th><th style="border-width:medium;border-style:none;border-color:initial;width:244px;vertical-align:middle;padding:10px 0px 0px;text-align:left;background-color:rgb(108,108,108)"><p align="center" style="font-weight:normal;margin-bottom:1em;font-size:14px;font-family:tahoma,geneva,sans-serif;color:rgb(56,56,56);text-align:center;margin-top:0px;line-height:18px;background-color:transparent"><br></p><p align="center" style="font-weight:normal;margin-bottom:1em;font-size:14px;font-family:tahoma,geneva,sans-serif;color:rgb(56,56,56);text-align:center;margin-top:0px;line-height:18px;background-color:transparent"><a title="" href="https://www.youtube.com/channel/UCCC_QmqL9yuKBnZ6p4mnxBw" rel="noreferrer noreferrer noreferrer noreferrer noreferrer noreferrer" style="color:rgb(253,251,251);text-decoration-line:none" target="_blank"><font color="#fdfbfb">Virtual: </font><strong>YouTube</strong><font color="#fdfbfb"> Canal </font><strong><span>IFEVA</span></strong></a></p><p align="center" style="margin-bottom:1em;font-size:14px;font-family:tahoma,geneva,sans-serif;text-align:center;margin-top:0px;line-height:18px;background-color:transparent"><font color="#fff2cc"><span style="font-weight:normal">Presencial: </span>S.U.M.<font style="font-weight:normal"> </font></font><strong><font color="#fff2cc"><span>IFEVA</span></font></strong><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:0px;text-align:left;background-color:rgb(254,251,251)"><table cellspacing="0" cellpadding="0" align="left" style="width:600px"><tbody><tr height="121" style="height:121px"><th style="border-width:medium;border-style:none;border-color:initial;width:600px;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/A1D4E880-2191-4DD7-2282-E4EBD8D61287_Image_5_91564d99-8f65-4b8d-9d26-1320ac7ed277.jpg" width="600" 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:10px 0px 5px;text-align:left;background-color:rgb(253,251,251)"><table cellspacing="0" cellpadding="0" align="left" style="width:600px"><tbody><tr height="126" style="height:126px"><th style="border-width:medium;border-style:none;border-color:initial;width:54px;vertical-align:top;font-weight:normal;padding:10px 5px 5px;text-align:left;background-color:transparent"><span class="gmail_default" style="font-family:tahoma,sans-serif"></span><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/5A4A5834-3F9A-6A31-826B-CB9282750DB7_Image_6_f652f2ce-f80b-4f92-bd91-eb57b875ac83.png" width="18" 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><th style="border-width:medium;border-style:none;border-color:initial;width:526px;vertical-align:top;padding:5px"><b><font size="6">El
pastoreo y la fertilización modulan las interacciones entre pastos
nativos y exóticos. Implicancias para la invasión de forrajeras en
un pastizal de la Pampa Deprimida</font></b></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(254,251,251)"><table cellspacing="0" cellpadding="0" align="left" style="width:600px"><tbody><tr height="564" style="height:564px"><th style="border-width:medium;border-style:none;border-color:initial;width:570px;vertical-align:top;padding:10px 15px;text-align:left;background-color:transparent"><p align="left" style="margin-bottom:1em;margin-top:0px;line-height:20px;background-color:transparent"><font size="4" style="font-family:tahoma,geneva,sans-serif"><span style="font-weight:normal;color:rgb(66,176,91)">Autor<span class="gmail_default" style="font-family:tahoma,sans-serif">es</span>:</span><font color="#383838"><span style="font-weight:normal"> </span></font></font><font style="font-family:tahoma,sans-serif;font-size:large;background-color:transparent"><span lang="es-ES"><i>Celeste Silvoso(1)* , </i><span style="font-weight:normal">Pamela Graff</span></span></font><span style="font-weight:normal;background-color:transparent;font-family:tahoma,sans-serif;font-size:large">(1) y Pedro Tognetti(2) </span></p><p align="left" style="margin-bottom:1em;margin-top:0px;line-height:20px;background-color:transparent"><strong style="background-color:transparent;color:rgb(56,56,56);font-size:large"><span style="color:rgb(66,176,91)"><font face="tahoma, geneva, sans-serif">Filiaci</font><font face="tahoma, sans-serif">ó</font><font face="tahoma, geneva, sans-serif">n</font><font face="tahoma, geneva, sans-serif">:</font></span></strong><span style="background-color:transparent;color:rgb(56,56,56);font-family:tahoma,geneva,sans-serif;font-size:large;font-weight:normal"> <i>(1) </i></span><span style="background-color:transparent;font-weight:normal"><font size="4">IFEVA - CONICET. Cátedra de Ecología, Facultad de Agronomía, Universidad de Buenos Aires.</font></span></p><p align="left" style="margin-bottom:1em;margin-top:0px;line-height:20px;background-color:transparent"><span style="font-size:large;background-color:transparent;font-weight:normal"><i>(2)</i> </span><span style="background-color:transparent;font-weight:normal"><font size="4">IFEVA - CONICET. Departamento de Métodos Cuantitativos y Teledetección, Facultad de Agronomía, Universidad de Buenos Aires.</font></span></p><p align="left" style="margin-bottom:1em;margin-top:0px;line-height:20px;background-color:transparent"><i style="background-color:transparent;font-weight:normal;font-size:large">(*) Expositora</i><br></p><p align="left" style="margin-bottom:1em;margin-top:0px;line-height:20px;background-color:transparent"><font size="4" style="background-color:transparent;font-weight:normal"><strong><span style="color:rgb(66,176,91)"><font face="tahoma, geneva, sans-serif">Resumen: </font></span></strong></font><span style="text-indent:1.27cm;background-color:transparent;font-weight:normal"><font size="4">La teoría indica que la coexistencia entre
especies exóticas y nativas en comunidades naturales depende del
grado de diferenciación de sus nichos ecológicos y de su habilidad
competitiva relativa. Factores que modifiquen el balance de
interacciones, aumentando las diferencias competitivas entre ambos
grupos, podrían determinar el desplazamiento de especies a pesar de
que sus nichos no estén totalmente superpuestos en el tiempo. Nos
preguntamos si estos mecanismos podrían estar relacionados con una
mayor invasión de forrajeras exóticas en pastizales naturales de la
Pampa Deprimida. Evaluamos cómo la ausencia de pastoreo y la
fertilización influyen en la intensidad de las interacciones entre
grupos de especies nativas y exóticas, que tienen distintos periodos
de crecimiento vegetativo. Los resultados de experimentos
manipulativos a campo y en mesocosmos mostraron que los pastos
exóticos y nativos de este pastizal natural pueden competir
fuertemente entre ellos a pesar de que sus períodos de crecimiento
no estén totalmente solapados. La ausencia de pastoreo y la
fertilización intensifican la competencia entre grupos, lo que les
da cierta ventaja a los pastos exóticos. La intensidad de
competencia es mayor cuanto mayor es la superposición temporal. Este
mecanismo podría ser, en parte, responsable de la baja ocurrencia
actual de pastos nativos invernales en el pastizal, ya que las
invasoras exóticas también son principalmente de crecimiento
invernal.</font></span></p>
<p align="left" style="margin-bottom:1em;color:rgb(56,56,56);margin-top:0px;line-height:20px;background-color:transparent"><font size="4" style="background-color:transparent;font-family:tahoma,geneva,sans-serif"><span style="color:rgb(66,176,91)"><span style="font-weight:normal">Palabras claves: </span></span></font><span style="background-color:transparent;font-weight:normal;color:rgb(34,34,34)"><font size="4">competencia,
exóticas, pastos, pastoreo, fertilización, coexistencia,
pastizales.</font></span><br></p>
<p align="left" style="font-weight:normal;margin-bottom:1em;font-family:tahoma,geneva,sans-serif;color:rgb(56,56,56);margin-top:0px;line-height:20px;background-color:transparent"></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" style="width:600px"><tbody><tr height="163" style="height:163px"><th style="text-align:right;border-width:medium;border-style:none;border-color:initial;width:140px;vertical-align:top;font-weight:normal;padding:5px;background-color:transparent"><img src="cid:ii_l546qpn20" alt="unnamed (7).png" width="173" height="202" style="margin-right:0px"><br></th><th style="border-width:medium;border-style:none;border-color:initial;width:440px;vertical-align:top;padding:5px;text-align:left;background-color:transparent"><p align="left" style="margin-bottom:1em;color:rgb(56,56,56);margin-top:0px;line-height:18px;background-color:transparent"><font color="#383838" style="background-color:transparent;font-weight:normal"><font size="4" face="tahoma, sans-serif"><b><span style="background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial">Celeste Silvoso </span></b></font></font><span style="background-color:transparent;font-weight:normal;color:rgb(34,34,34)"><font size="4">es </font></span><font size="4"><span style="background-color:transparent;font-weight:normal;color:rgb(34,34,34)">Licenciada
en Cs. Ambientales de la Facultad de Agronomía, UBA. Es ayudante de
primera en la Cátedra de Ecología, FAUBA, desde 2011 y docente en
UCES. Actualmente realiza su doctorado con la Dra. Pamela Graff y el Dr. Pedro
Tognetti en IFEVA-FAUBA. Trabaja en ecología de comunidades
vegetales en pastizales naturales.</span><span style="background-color:transparent;font-weight:normal;color:rgb(34,34,34)"> </span></font></p><p align="left" style="margin-bottom:1em;color:rgb(56,56,56);margin-top:0px;line-height:18px;background-color:transparent"><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: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"><p align="left" style="margin-bottom:1em;font-family:verdana,arial,helvetica,sans-serif;color:rgb(56,56,56);margin-top:0px;line-height:18px;background-color:transparent"><span style="font-weight:normal;font-size:14px;line-height:18px"><strong>Certificados:</strong> <span class="gmail_default" style="font-family:tahoma,sans-serif"></span></span><span style="font-weight:normal;background-color:transparent;font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;color:rgb(34,34,34)">los alumnos que necesiten certificar su asistencia, deberán enviar </span><span style="font-weight:normal;background-color:transparent">su nombre y DNI</span><span class="gmail_default" style="font-weight:normal;background-color:transparent;font-family:tahoma,sans-serif"> </span><span class="gmail_default" style="background-color:transparent;font-family:tahoma,sans-serif"><span style="font-weight:normal">al moderador (</span><a href="mailto:mtexeira@agro.uba.ar" rel="noreferrer noreferrer noreferrer noreferrer 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 en la hora posterior a la finalización del mismo</span><span style="font-weight:normal;background-color:transparent">. </span></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(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> Av. San Martín 4453 - C1417DSE - Buenos Aires - Argentina</p></th></tr></tbody></table></th></tr></tbody></table></td></tr></tbody></table></div></div></div></div><font color="#888888"><font color="#888888"><font color="#888888"><div><span style="font-family:Arial,Helvetica,sans-serif;color:rgb(34,34,34)"><br></span></div><div><span style="font-family:Arial,Helvetica,sans-serif;color:rgb(34,34,34)"><br></span></div><div><span style="font-family:Arial,Helvetica,sans-serif;color:rgb(34,34,34)"><br></span></div><div><span style="font-family:Arial,Helvetica,sans-serif;color:rgb(34,34,34)"><br></span></div><div><span style="font-family:Arial,Helvetica,sans-serif;color:rgb(34,34,34)">--</span><br></div></font></font></font></div><div dir="ltr" data-smartmail="gmail_signature"><div dir="ltr"><div>Marcos Texeira<br>Departamento de Métodos Cuantitativos y Sistemas de Información // <br>LART - IFEVA - CONICET<br>Facultad de Agronomía<br></div><div>Universidad de Buenos Aires</div><div><span>Av. San Martín 4453 (C1417DSE)<br></span></div></div></div></div>
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