Ep. 405 - Early Land Plants & Earth's Ancient Climate

In Defense of Plants Podcast

In Defense of Plants

Botany, Natural Sciences, Ecology, Nature, Plants, Science

4.8 • 1.3K Ratings

🗓️ 22 January 2023

⏱️ 45 minutes

🔗️ Recording | iTunes | RSS

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Summary

The earliest days of land plant evolution have long thought to have occurred in a hot house environment fueled by high CO2 levels. However, recent investigations suggest this may not have been the case and that small plants, not forests, had a massive role to play. Join me and Dr. Tais W Dahl as we travel back over 400 million years to the Devonian Period and discuss how small relatives of lycopods may have altered Earth's atmosphere to such a degree that the Devonian climate may have been more familiar than once hypothesized. This episode was produced in part by Nichole, Paul, Karen, Randi, Caelan, Tom, Don, Susan, Corbin, Keena, Robin, Peter, Whitney, Kenned, Margaret, Daniel, Karen, David, Earl, Jocelyn, Gary, Krysta, Elizabeth, Southern California Carnivorous Plant Enthusiasts, Pattypollinators, Peter, Judson, Ella, Alex, Dan, Pamela, Peter, Andrea, Nathan, Karyn, Michelle, Jillian, Chellie, Linda, Laura, Miz Holly, Christie, Carlos, Paleo Fern, Levi, Sylvia, Lanny, Ben, Lily, Craig, Sarah, Lor, Monika, Brandon, Jeremy, Suzanne, Kristina, Christine, Silas, Michael, Aristia, Felicidad, Lauren, Danielle, Allie, Jeffrey, Amanda, Tommy, Marcel, C Leigh, Karma, Shelby, Christopher, Alvin, Arek, Chellie, Dani, Paul, Dani, Tara, Elly, Colleen, Natalie, Nathan, Ario, Laura, Cari, Margaret, Mary, Connor, Nathan, Jan, Jerome, Brian, Azomonas, Ellie, University Greens, Joseph, Melody, Patricia, Matthew, Garrett, John, Ashley, Cathrine, Melvin, OrangeJulian, Porter, Jules, Griff, Joan, Megan, Marabeth, Les, Ali, Southside Plants, Keiko, Robert, Bryce, Wilma, Amanda, Helen, Mikey, Michelle, German, Joerg, Cathy, Tate, Steve, Kae, Carole, Mr. Keith Santner, Lynn, Aaron, Sara, Kenned, Brett, Jocelyn, Ethan, Sheryl, Runaway Goldfish, Ryan, Chris, Alana, Rachel, Joanna, Lori, Paul, Griff, Matthew, Bobby, Vaibhav, Steven, Joseph, Brandon, Liam, Hall, Jared, Brandon, Christina, Carly, Kazys, Stephen, Katherine, Mohsin Kazmi Takes Pictures, Manny, doeg, Daniel, Tim, Philip, Tim, Lisa, Brodie, Bendix, Irene, holly, Sara, and Margie.

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Transcript

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0:00.0	Hello everyone and welcome to the Indefensive Plants podcast, the official podcast of
0:04.2	Indefensiveplants.com.
0:05.6	What's up? This is your host, Matt. Welcome to the show. How is everyone doing this week?
0:09.6	Today we are going deep, deep back in time to talk about the world before forests and how
0:15.4	plants may have changed the atmosphere compared to what was previously thought.
0:19.8	Spoiler alert, little plants often have massive impacts,
0:23.2	especially compared to their forest-making cousins. Joining us to talk about this is Dr. Tice W. Dahl.
0:29.6	He's a geobiologist from Denmark, and he, along with his colleagues, have done some amazing work
0:34.9	trying to understand what the atmosphere was like over 400 million years
0:38.3	ago and the role plants played in shaping it. Before we get to that conversation, I just want to say,
0:44.1	consider supporting this podcast over at patreon.com slash indefensive plants because I literally could not
0:49.1	be doing this podcast each and every week without the contributions of my patrons. If you're
0:53.9	enjoying the show, you have them to thank.
0:56.0	That's all I'm going to say about that.
0:57.6	Let's get on with it because this is absolutely fascinating work.
1:01.1	Without further ado, here's my conversation with Dr. Tice W. Dahl.
1:04.9	I hope you do. Thank you so much for having me. Yeah, I'm Tice Dahl. I'm a
1:34.7	associate professor at University of Copenhagen. I have a background in planetary science. I was
1:41.6	trained as a physicist and I got interested in how life
1:45.9	has changed our planet. And then I went on to do a PhD, which was mainly trying to track how
1:54.7	life has evolved over the history of Earth. And then I got into geo biology and palatology.
2:04.2	Yeah, so much of my training was actually in the U.S. even though I'm in Denmark and I'm from Denmark. So I'm really delighted to give a
	...

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