Sun, 21 January 2018
The gang talks about conservation paleoecology; the study of the fossil record to inform modern conservation efforts. Specifically, they look at two papers, one which is an overview of the current issues in the field, and the other which focuses on how mass extinctions can change the distribution of species on the planet. Also, James has very strong opinions about the most recent Splatoon 2 Splatfest, Amanda nearly breaks an arm, and Curt tries in vain to hold everything together.
Up-Goer Five (Curt Edition):
The friends talk about how life is dying. A lot of people think life is dying faster than we think it should and that people might be causing life to die faster. The friends talk about how we can use the past to see how quickly life died in the past in order to let us know if the dying we see right now is a problem. There are a lot of people who have looked at the past and they find that people have changed the land and water and air a great deal. These changes do seem to have helped make life die faster. But there are things we can try to do to try and stop this, and keep more life in the land, water, and air. And we can use the past to understand what land, water, or air we should put the most work behind to really stop life from dying so quickly.
The friends then talk about a time when a lot of life died at once. At this time, a big change happened in the air, land, and water. At that time, most animals in the land, water, and air died off, but some animals did really well. They seemed to like the changes and moved all around. These animals that moved all around might have changed how life gets better after dying a lot. This suggests that animals moving all around might be something we see during times when big changes in the land, air, and water cause life to start dying really fast.
Button, David J., et al. "Mass extinctions drove increased global faunal cosmopolitanism on the supercontinent Pangaea." Nature communications 8.1 (2017): 733.
Barnosky, Anthony D., et al. "Merging paleobiology with conservation biology to guide the future of terrestrial ecosystems." Science 355.6325 (2017): eaah4787.
Sun, 7 January 2018
The gang celebrates the new year by just talking about birds. Specifically, they look at two papers that use the evolutionary history of birds to explore if geographic changes or ecological adaptation controlled the macroevolutionary history of birds. Meanwhile, Amanda has some technical difficulties, James becomes Legion "Destroyer of Minds", and Curt is a dick to his friends. <Editor's Note: If you want to jump to the science, the discussion actually begins at 13 mins 10 secs>
Up-Goer Five (Amanda Edition):
Today our friends look at two papers that both talk about animals that do not have hair or hard skin but rather have big pointed things on their face and can fly. The first paper looks at animals that do not have hair or hard skin but have big pointed things on their face and can fly and wants to see if these animals changed over time in and if they also changed the place they are from while changing over time. They say that most of the flying animals with no hair or hard skin but big pointed things on their face lived further down on the world until all the big angry animals with no hair that would eat them died and went away. Once all of those big angry animals were gone, the flying animals with no hair or hard skin but big pointed things on their face started moving all over the world and now live all over. They also say that they moved in a way that is easy to see and that it goes with whether it is warm or cold or wet or dry. The second paper also looks at these flying animals with no hair or hard skin but big pointed things on their face, and it talks about the "big change over time" idea. They use the big pointed thing on the animals face to tell this story. They say that the small groups of these animals changed over time in a different way than the big groups of these animals. They say that this means that the "big change over time" idea is right and that is what is going on to these flying animals with no hair or hard skin but with big pointed things on their face.
Cooney, Christopher R., et al. "Mega-evolutionary dynamics of the adaptive radiation of birds." Nature 542.7641 (2017): 344-347.
Claramunt, Santiago, and Joel Cracraft. "A new time tree reveals Earth history’s imprint on the evolution of modern birds." Science Advances 1.11 (2015): e1501005.