For these two #sympatric Parnassia species, pre-pollination barriers play a more significant role in #reproductive isolation than post-#pollination barriers!
What does it all mean? Find out here!
https://doi.org/10.1111/jse.13184
@WileyEcolEvol
#PlantSci #JSE #flower #development #stamen #botany
Minor revisions on two manuscripts í 5 days
Both on sympatric charr from lake Þingvallavatn
Variation of tooth traits in ecologically specialized and sympatric morphs
And
Gene flow and habitat heterogeneity shape coexistence dynamics of Arctic charr morphs in connected lakes
#evolution #sympatric #charr #diversity
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.
https://phys.org/news/2023-10-prezygotic-isolation-sympatric-dioecious-figs.html
Cospeciation is generally considered a key process driving the diversity of figs and their pollinating wasps. Ficus squamosa and Ficus heterostyla are two closely related dioecious figs. This pair represents a good system for gaining insights into cospeciation dynamics and processes, as well as the potential biological consequences of heterospecific visitation.
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
Trible et al. report a variant strain of the clonal raider ant that expresses queen-like traits in individuals that would normally become workers. These obligately parasitic variants have a mutated supergene and arose directly from their free-living parent strain, suggesting a genetic mechanism for the evolution of ant workerless social parasites.
#Sympatric or micro-#allopatric #speciation in glacial #lake? #Genomic islands support neither.
https://phys.org/news/2023-01-sympatric-micro-allopatric-speciation-glacial-lake.html
Speciation is one of the core issues in evolutionary biology. Sympatric speciation is the evolution of reproductive isolation without geographic barriers in which new species arise from a single ancestral population. However, bidirectional gene flow between species can retard or even reverse the population divergence in the early stages of sympatric speciation, raising doubts about this pattern of speciation.
J of Systematics and Evolution
Charrvein
CellBioNews
Richard Lenski
XCsci