Research-Academic Highlights (2016, 2015)
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Topic: facilitando
la comprensión y el uso de modelos GLM, GAM y PLS. *
Se plantea el problema y la solución a los análisis de regresión en los que
las variables predictoras están fuertemente
relacionadas entre sí, usando para ello el método de los mínimos cuadrados
parciales (PLS).
* El uso de estas herramientas se ejemplifica con el entorno de análisis de
datos R, desarrollando todos los pasos necesarios para llevar a cabo un
análisis detallado de los datos. [Leer 1]
[Leer 2]. |
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Topic: regional average densities of species are highly
predictable from occurrence probabilities. |
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Topic: temperature has a limited
effect on winter bird distribution in peninsular Spain * We model the influence
of minimum winter temperature on the relative abundance of 106 terrestrial
bird species wintering in peninsular Spain, at 10 ×10 km2
resolution, using 95%-quantile regressions. * Temperature explained a
low proportion of variation in abundance, only limiting the maximum potential
abundance of species. Species attained their maximum abundances in areas
1.9ºC warmer than the average temperature available in peninsular Spain. The
average temperature in the area of distribution was lower than the thermal
preferences of the species. * Many species prefer the
warmest areas to overwinter, which suggests that temperature imposes
important restrictions to birds wintering in the Iberian Peninsula. However,
one third of species overwinter in locations colder than their thermal preferences,
probably reflecting the interaction between habitat and thermal requirements.
Read more |
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Topic: exoskeleton of
coleopteran may act as a structure capable of controlling body temperatures *
The thermal response was
significantly influenced by phylogenetic relatedness, although it was not
affected by the apterous condition. The asymptotic
internal temperature of specimens was not affected by the thoracic volume,
but was significantly higher under simulated sunlight conditions than under
infrared radiation, and when exposed dorsally as opposed to ventrally.
Heating rate was negatively and significantly influenced by thoracic volume
independently of the source of radiation, and was significantly affected by
body position (beetles heated faster when exposed dorsally). *
These results suggests
the existence of a kind of “passive physiology” imposed by the exoskeleton
and body size, where interspecific relationships play a minor role. Read more |