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24.09.2015

Ciclo de conferencias del proyecto europeo Synthesys

Tipo:Conferencia

Fecha: Jueves, 24 de septiembre de 2015

Horario: a las 12:00 horas

Lugar: Salón de Actos del MNCN

Título: 'Bidirectional communication and micropterism in bush-crickets: examples of convergent evolution and enforced speciation at the two corners of the Mediterranean'

Impartida por:  Dragan Petrov Chobanov, Institute of Biodiversity and Ecosystem Research (Bulgarian Academy of Sciences), visitante del proyecto europeo Synthesys con la Dra. Mercedes Paris.

 

 

«The Orthopterans are among the first acoustically communicating animals to have evolved. Traces of structures possibly involved in stridulation have been dated back to the Triassic. Typically the male song attracts the silent females, but a few groups have developed bidirectional communication systems. These include some of the most diversified and systematically complicated taxa of Orthoptera. Such a group is the subfamily Phaneropterinae (Tettigoniidae) with about 2300 species concentrated in the tropics. Most of those are macropterous but a few groups that developed microptery underwent an explosive diversification outside the tropical areas. Over 13% of the total diversity of Phaneropterinae and over 85% of its micropterous representatives occurs in the Mediterranean. Recently, significant attention has been given to the East-Mediterranean Barbitistini, while the Western-Mediterranean lineage, genus Odontura (Odonturini), has been neglected and only lately five European taxa have been concerned systematically. Interestingly and similarly to other short-winged Phaneropterines over the World, contrary to the morphological similarities, both groups are polyphyletic according to the recent genetic data. Similar cases of convergent evolution may be observed in other distantly related Tettigoniids in the Mediterranean - Hetrodinae and Bradyporinae.

Few studies have attempted to reconstruct the phylogenetic relationships of bidirectionally communicating grasshoppers and bush-crickets, and those that have are somewhat controversial. In this talk I will try to exemplify the current knowledge on the evolution-driving forces in bush-crickets with complicated communication systems using the above mentioned cases.»

 

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CONTACTO

Josefina Cabarga

http://www.sam.mncn.csic.es/

mcnc104@mncn.csic.es

Teléfono: +34 91 411 1328 ext. 1117

Fax:915645078

 

 

 

22.09.2015

Ciclo de conferencias del proyecto europeo Synthesys

Tipo:Conferencia

Fecha: Martes, 22 de septiembre de 2015

Horario: a las 11:00 horas

Lugar: C/ Pinar, 25 (Sala de Juntas de Paleobiología).

Título: 'Microwear Texture Analysis and the Diet of Paleolithic Hominins'

Impartida por: Sireen El Zaatari, Max Planck Institute for Evolutionary Anthropology (Leipzig, Germany), y becaria del proyecto europeo Synthesys con el Prof. Antonio Rosas.

 

 

«Microwear texture analysis is a new automated and repeatable approach to the study of dental microwear, where the scanning confocal profilometry replaces the scanning electron microscopy and scale-sensitive fractal analysis is introduced as a tool for 3-D analysis of microwear features. Studies employing this technique for the analysis of occlusal molar microwear patterns of various extant and extinct species, including hominins, have attested to its efficiency in providing insights into the dietary habits of these taxa. Specifically, the application of this technique to a large number of paleolithic hominins from their wide temporal and geographic ranges has shed light on behavioral aspects that distinguish Upper Paleolithic Modern Humans from their predecessors, i.e., the Neandertals and Pre-Neandertals, in western Eurasia.
The major results of the occlusal molar microwear texture analyses reveal differences in the patterns of dietary adaptations of these hominins: whereas the Neandertals adapted to changing paleoecological conditions by altering their diets, Upper Paleolithic Humans altered their technologies to free themselves from such environmental constraints and obtain access to preferred food resources.»

 

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CONTACTO

Josefina Cabaraga

http://www.sam.mncn.csic.es/

mcnc104@mncn.csic.es

Teléfono: +34 91 411 1328 ext. 1117

Fax:915645078

 

 

 

10.07.2015

Seminario de Investigación

Tipo:Seminario

Viernes, 10 de julio a las 12:00 horas en el Salón de Actos

 

Seminario de Investigación


Título: 'Amphibian Population Declines: Complex Causes and Consequences for Global Amphibian Biodiversity'

Conferencia impartida por: Dra. Karen Lips, Department of Biology, University of Maryland, USA.

 

29.05.2015

Seminario Polar

Tipo:Seminario

viernes, 29 de mayo a las 13:00 horas en el Salón de Actos

 

Seminario de Investigación


Título: 'Halógenos en la atmósfera polar: Observaciones  e impacto  en el equilibrio del ozono. Proyecto HELADO'

Conferencia impartida por: Margarita Yela del Instituto Nacional de Técnica Aeroespacial (INTA)

 

 

 

 

 

26.05.2015

Seminario de Investigación

Tipo:Seminario

Martes, 26 de mayo a las 12:00 horas en el Salón de Actos

 

Seminario de Investigación


Título: 'Geological emissions of C-bearing gases: CO2 vs CH4 in the global atmospheric budget'

Conferencia impartida por: Giuseppe Etiope, Istituto Nazionale di Geofisica e Vulcanologia (Roma, Italia).

 

 

 

 

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