class: center, middle, inverse, title-slide .title[ # Speciation
] .author[ ###
Dylan Padilla
Fall, 2022
dpadil10@asu.edu
https://dylanpadilla.netlify.app/
] --- # Outline <br/> ## Mechanisms of isolation - Prezygotic - Postzygotic -- ## Modes of speciation - Allopatric speciation - Sympatric speciation - Parapatric speciation -- ## Limitations - Cryptic species --- .pull-left[ <img src = "imgs/tree_photos.jpeg" height = 590, width = 650> ] <center> .pull-right[ <img src = "imgs/orchids_tree.png" height = 600, width = 400> ] </center> --- class: center, middle # Why is the world strcutured like this? <br><br> How has this come about? --- # Species <br> A group of organisms that are <span style='color: orange;'>reproductively isolated</span> from each other -- <br> <center> What does <span style='color: orange;'>reproductive isolation</span> mean? </center> <br> -- .pull-left[ <span style='color: purple;'>Prezygotic</span> - prevent fertilization of eggs - Habitat isolation - Temporal isolation - Mechanical isolation - Gametic isolation - Behavioral isolation ] -- .pull-right[ <span style='color: skyblue;'>Postzygotic</span> - prevent formation of fertile offspring - Hybrid inviability - Hybrid sterility - Hybrid breakdown ] --- # <span style='color: purple;'>Prezygotic</span> mechanisms of isolation .pull-left[ <br><br><br> - Habitat isolation ] -- .pull-right[ <br> ![](imgs/habitat-isolation.gif) ] --- # <span style='color: purple;'>Prezygotic</span> mechanisms of isolation .pull-left[ <br><br><br> - Habitat isolation - Temporal isolation ] .pull-right[ <img src = "imgs/temporal-isolation.gif" height = 200, width = 350> <img src = "imgs/temporal-isolation2.gif" height = 200, width = 350> ] --- # <span style='color: purple;'>Prezygotic</span> mechanisms of isolation .pull-left[ <br><br><br> - Habitat isolation - Temporal isolation - Mechanical isolation ] .pull-right[ <img src = "imgs/mechanical-isolation.jpeg" height = 400, width = 430> ] --- # <span style='color: purple;'>Prezygotic</span> mechanisms of isolation .pull-left[ <br><br><br> - Habitat isolation - Temporal isolation - Mechanical isolation - Gametic isolation ] .pull-right[ <br> <img src = "imgs/gametic-isolation.gif" height = 320, width = 500> ] --- # <span style='color: purple;'>Prezygotic</span> mechanisms of isolation .pull-left[ <br><br><br> - Habitat isolation - Temporal isolation - Mechanical isolation - Gametic isolation - Behavioral isolation ] .pull-right[ <br> ![](imgs/behavioral-isolation.gif) ] --- # <span style='color: skyblue;'>Postzygotic</span> mechanisms of isolation .pull-left[ <br><br><br> - Hybrid inviability ] .pull-right[ ] --- # <span style='color: skyblue;'>Postzygotic</span> mechanisms of isolation .pull-left[ <br><br><br> - Hybrid inviability - Hybrid sterility ] .pull-right[ ![](imgs/mule.jpeg) ] --- # <span style='color: skyblue;'>Postzygotic</span> mechanisms of isolation .pull-left[ <br><br><br> - Hybrid inviability - Hybrid sterility - Hybrid breakdown ] .pull-right[ <img src = "imgs/hybrid-breakdown.jpeg" height = 400, width = 500> ] --- class: center, middle # Modes of speciation --- # Allopatric speciation <center> <img src = "imgs/allopatric-speciation.png" height = 500, width = 800> </center> --- # Allopatric speciation <center> .pull-left[ ![](imgs/Drosophila.jpeg) ] .pull-right[ <img src = "imgs/allopatric-drosophila.png" height = 400, width = 400> </center> ] --- # Sympatric speciation <center> .pull-left[ <img src = "imgs/sympatric-speciation1.jpeg" height = 450, width = 300> ] .pull-right[ ![](imgs/sympatric-speciation2.png) </center> ] --- # Parapatric speciation <br> <center> <img src = "imgs/parapatric-speciation.png" height = 400, width = 590> </center> --- # Limitations - Cryptic species <center> <img src = "imgs/cryptic-species.jpeg" height = 500, width = 570> </center> --- class: center, middle # Time for the worksheet questions!