Palaeo After Dark

The gang discusses two papers that look at patterns of niche conservatism or niche evolution in the fossil record. The first paper looks at the pollen records of trees in Portugal to test if changing climate can explain modern tree distributions, and the second paper looks at the impact of Late Devonian extinction pulses/invasions on brachiopod communities. Meanwhile, Curt summarizes the podcast, James has brachiopod facts, and Amanda cannot control her cats.

 

Up-Goer Five (Curt Edition):

Our friends talk about two papers that look at where animals live and what they do in the world, and also if that stays the same or changes over time. The first paper looks at tall living things that make their own food and lose a part of themselves every fall. This looks at one place that has just a few of these types of living things but in the past there were different types there. Also, back then it was not as warm and the rain was different. This paper wants to see why the tall living things we have in this part of the world are where they are right now. What they saw was that, some of the changes in the tall things seem to be tall things following where they want to live; when things get warmer or colder they move to follow the change. But some things seem to be moving into places that are very different from where they started, so they are changing what types of places they like to live in.

The second paper looks at animals that live on the bottom of the big blue wet thing and take food out of the water and were found all over the world a long time ago. It looks at a time when a big change killed a lot of living things. This paper looks at how this changed the types of these animals over time. What they find is that, a lot of the animals that die because of the change have another animal from somewhere else doing the same thing move in and take that animal's place. The things that do not die just keep on doing their own thing. It does not look like there is much change in what the animals are doing either from the big change that happened, or from the new animals moving in.

 

References:

Vieira, Manuel, et al. "Niche  evolution versus niche conservatism and habitat loss determine  persistence and extirpation in late Neogene European Fagaceae." Quaternary Science Reviews 300 (2023): 107896.

Brisson, Sarah K., et al. "Niche conservatism and ecological change during the Late Devonian mass extinction." Proceedings of the Royal Society B 290.1996 (2023): 20222524.

Direct download: Podcast_259_-_Niche_Evolution_or_Conservatism.mp3
Category:general -- posted at: 3:00am EDT

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