PMMV

Body size regulates niche overlap asymmetry in the subtropical Andes rain shadow: Isotopic paleoecology of Oligocene South American ungulates onlinelibrary.wiley.com/doi/10.1111/17… by @DnaeSnz96 et al. 🎨 Sara Meisi Pérez Maqueda

Hoy, en la facultad de Ciencias @geologicasUCM

🚨New pub🚨 Pleased to finally share this! We tracked how breastfeeding and weaning are recorded in tooth enamel dC. clear signal👍 stable offset through development 👶to🧓. Can we detect breastfeeding in fossils? Yes😍 sciencedirect.com/science/articl…

📢 ¿Qué nos puede enseñar el pasado sobre los ecosistemas actuales? Este jueves estaré en el ciclo "Geopaleobiología del Cenozoico". Hablaré de cómo el análisis de redes ayuda a entender la evolución de los ecosistemas durante millones de años. 🗓 9 de abril | ⏰ 13:00 | 📍 UCM

Life finds a niche: Ecological specialisation across the Tree of Life youtube.com/live/hySyQNdCK… by @Paleobicha at @mncn_csic

En abril vuelve a la @unicomplutense el ciclo de conferencias sobre GeoPaleoBiología del Cenozoico... ¡Reserva los días!

Bienvenido Gorgonavis!! First longirostrine enantiornithine from outside of China. Paper here: sjp.pensoft.net/article/182813/

Say👋 to *Gorgonavis alcyone*, the newest enantiornithine bird from the Early Cretaceous of Spain✨🐦 We welcome here the 1st adult cranial remains of a bird from the fossil site of Las Hoyas, and the 1st longipterygid out of China... Thread!!🧵👇 Paleart by @RocOlivePous

¡También puedes ver nuestros trabajos desde Instagram! instagram.com/stories/highli…

La oposición a la polémica ley de universidades de la Comunidad de Madrid desencadena una cascada de dimisiones en la Consejería de Educación publico.es/politica/ayuso…

Agradecemos a @sepaleontologia la noticia sobre nuestro último trabajo acerca de los procesos evolutivos en ardillas en doi.org/10.1111/jbi.70…

9️⃣ 📄 Open-access paper in Journal of Biogeography: “Biome Specialisation in Squirrels: Phylogenetic and Geographic Patterns” 👉 doi.org/10.1111/jbi.70…

8️⃣ 🚨 Conservation message: Regions like the Sunda Shelf are top priorities: ✔️ Many specialists ✔️ High endemism ✔️ High sensitivity to climate change

7️⃣ 🧠 Take-home message: Past climate changes produced faunas dominated by specialists, especially in fragmented biomes. Specialization can boost biodiversity… but also increases vulnerability.

6️⃣ 🌳 Interestingly, these species-rich regions show low phylogenetic diversity: many species, but closely related 👉 a signal of rapid past speciation.

5️⃣ 🗺️ Where are the main hotspots? Southeast Asia — especially Borneo — stands out with extremely high species richness… and most species there are endemic specialists.

4️⃣ 🌱 But not all biomes behave the same. Tropical rainforests and steppes host more specialists than expected. Deserts and tundra do not (partly because they host very few species).

3️⃣ 📊 The key result: 👉 There are far more specialist squirrels than expected by chance. This supports the idea that specialization is not (only) an evolutionary dead end.

2️⃣ According to the resource-use hypothesis (Elisabeth Vrba), specialists should generate more species during climate change, because their populations fragment more easily. 👉 But does this actually happen in nature? We tested it using squirrels.

1️⃣ Not all squirrels are generalists. Many species are biome specialists, restricted to a single habitat (rainforest, steppe, etc.).

¿Por qué hay tantas especies de ardillas y por qué no están repartidas de forma uniforme por el planeta? ucm.es/especies-ardil… sobre doi.org/10.1111/jbi.70…