[Lisfauba] SEMINARIO ESPECIAL IFEVA - VIernes 4 de octubre 2024 12:00 Hs - SUM IFEVA

[Facultad de Agronomía UBA]

* Seminario IFEVA*
[image: Twitter]
<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>
[image:
Youtube] <https://www.youtube.com/channel/UCCC_QmqL9yuKBnZ6p4mnxBw> [image:
Instagram] <https://www.instagram.com/ifevaok/>



*VIERNES4 DE OCTUBRE 202412:00 hs*

Presencial: SUM *IFEVA*
<https://www.youtube.com/channel/UCCC_QmqL9yuKBnZ6p4mnxBw>
Consumer mediated resistance to ecological transitions in a changing world

Autor: Samuel St. Clair

Filiación: Plant & Wildlife Sciences, College of Life Sciences, Brigham
Young University, Utah, USA

*Resumen: * An emergent property of biological communities is the capacity
to maintain equilibrium in response to ecological disruption by preventing
ecosystem transitions (resistance) or rebounding from it (resilience). Human
activities are transforming the structure and composition of earth’s
ecosystems through the introduction and spread of invasive species and the
creation of novel disturbance and climate regimes that are pushing
ecosystems beyond critical resistance and resilience thresholds. This can
lead to alternative 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 biological communities that underlie ecosystem
resilience, and synergies among global change factors that erode it. I
present evidence from long-term study plots across deserts of North America
that consumer communities are critical control points in resilience against
state transitions (ie. annual grass invasion and woody encroachment) via
seed predation and seedling herbivory and by creating trophic cascades
involving plant-soil feedbacks (see conceptual model below). The seminar
further investigates how novel fire regimes and extreme drought events may
uncouple trophic interactions underlying biotic resistance to state change
in dryland ecosystems.
[image: 94e17213-8add-4a6c-bf4e-99dedb7aab5c.png]

palabras clave: Communities, Consumers, Droughts, Fires, Herbivory
Resistance, Resilience.
[image: Screenshot 2024-10-01 at 3.57.14 PM.png]
*Dr. Sam St. Clair* 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.

Certificados: los alumnos que necesiten certificar su asistencia, deberán
enviar su nombre y DNI al moderador (mtexeira en agro.uba.ar) durante el
transcurso del seminario o dentro de la hora posterior a la finalización
del mismo.

*Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la
Agricultura*


IFEVA - Facultad de Agronomía - Universidad de Buenos Aires
 Av. San Martín 4453
<https://www.google.com/maps/search/Av.+San+Mart%C3%ADn+4453?entry=gmail&source=g>
-
C1417DSE - Buenos Aires - Argentina

--
Marcos Texeira
Departamento de Métodos Cuantitativos y Sistemas de Información //
LART - IFEVA - CONICET
(011) 52870829
Facultad de Agronomía
Universidad de Buenos Aires
Av. San Martín 4453
<https://www.google.com/maps/search/Av.+San+Mart%C3%ADn+4453?entry=gmail&source=g>
(C1417DSE)
------------ próxima parte ------------
Se ha borrado un adjunto en formato HTML...
URL: <http://listas.agro.uba.ar/pipermail/lisfauba/attachments/20241002/8148ed20/attachment.html>
------------ próxima parte ------------
A non-text attachment was scrubbed...
Name: 94e17213-8add-4a6c-bf4e-99dedb7aab5c.png
Type: image/png
Size: 269300 bytes
Desc: no disponible
URL: <http://listas.agro.uba.ar/pipermail/lisfauba/attachments/20241002/8148ed20/attachment.png>
------------ próxima parte ------------
A non-text attachment was scrubbed...
Name: Screenshot 2024-10-01 at 3.57.14?PM.png
Type: image/png
Size: 1686061 bytes
Desc: no disponible
URL: <http://listas.agro.uba.ar/pipermail/lisfauba/attachments/20241002/8148ed20/attachment-0001.png>