Lmst

A new study by Xiang et al. reveals that, for two #sympatric Parnassia species, pre-pollination barriers play a more significant role in #reproductive isolation than post-#pollination barriers.
https://doi.org/10.1111/jse.13184
@WileyEcolEvol
#PlantSci #JSE #flower #development #endemism #botany

In situ plant morphological images and flower close-ups of Parnassia wightiana and Parnassia amonena. Reproductive isolation components (pre- and post-pollination barriers) are listed, including ecogeography, phenology, stamen movement, pollinators, fruit set, seed production, and seed viability.

Understanding the factors contributing to #genetic structure among closely related #sympatric species is crucial for grasping adaptive divergence and #speciation initiation. Learn why in this revealing new #JSE paper!
https://doi.org/10.1111/jse.13178
@WileyEcolEvol
#evolution #ficus #botany

Ficus and fig wasp illustrations accompany geographic distribution and graphical data from Huang et al.'s study, "Population genetic structure in three sympatric Ficus species associated with copollinator."

Now moving to the anadromous charr

What is the ancestral state of Craniofacial morphology in Arctic charr?

And how variable are the putative ancestral populations?

Bones from anadromous
Pictured the 4 sympatric morphs

#evolution #Craniofacial #divergence #adaptation #sympatric #polymorphism

#Prezygotic_isolation between #sympatric #dioecious #figs may not yet be established.

#speciation

https://phys.org/news/2023-10-prezygotic-isolation-sympatric-dioecious-figs.html

I'm sad to report that my emeritus collegue Guy Bush passed away yesterday. He was a terrific scientist & storyteller, and w/ his late wife Dorie a friend to many here at #MSU and around the world.

Guy’s research focused on #sympatric #speciation in Rhagoletis. With the late Don Hall, Guy founded our highly succesful grad program in #Ecology, #Evolution & #Behavior.

Guy was the John Hannah Distinguished Prof of Evolutionary Biology, and a member of the American Academy of Arts & Sciences.

Diversity within species

4 #sympatric #ecomorphs of #ArcticCharr reside in Lake #Þingvallavatn #iceland

Split on size and habitat, head morphology

Possible solution to the mystery of the rapid, parallel, and #sympatric #evolution of #ant #workerless social #parasites (#inquilines): a single #mutation in a #supergene.

https://cell.com/current-biology/fulltext/S0960-9822(23)00136-7 Trible et al. 2023

Two yellowish small almost eyless #Ooceraea #biroi #ants: wild-type wingless worker and queen-like winged parasite

#Sympatric or micro-#allopatric #speciation in glacial #lake? #Genomic islands support neither.

#evolution #Gymnocypris

https://phys.org/news/2023-01-sympatric-micro-allopatric-speciation-glacial-lake.html

Manuscript on #craniofacial variation in #sympatric #ecomorphs of #ArcticCharr

This darling is nearly ready for submission. Very cool results from a study led by Guðbjörg Ósk Jónsdóttir and Sarah Steele, based on pioneering work by Finnur Ingimarsson and Sigurður S. Snorrason.

Diversity in the internal functional feeding elements of sympatric morphs of Arctic charr (Salvelinus alpinus)

This year all four of my #MscBiology students graduated

Two of them are here in the middle

Kristján and Guðbjörg, both worked on #ArcticCharr #sympatric #ecomorphs
#craniofacial #diversity

Tasty, fun to catch, and excellent models of speciation! Salmonids have it all! 🐟🍣🎣🧬😎

Specifically, co-ocurring (aka #sympatric) #salmonid #morphs that have #evolved recently, repeatedly, and independently can be thought of as natural replicates of #speciation!

Intrigued? Check out this talk I recently gave on "Evolutionary Insights from Sympatric Salmonid Morphs" at the #FishBase Salmonid Symposium at the Swedish Museum of Natural History!

▶️ https://youtu.be/fbYL-jjMJVs

#sympatric

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