Ep. 572 - Novel Weapons & Plant Invasions
In Defense of Plants Podcast
In Defense of Plants
4.8 • 1.3K Ratings
🗓️ 5 April 2026
⏱️ 53 minutes
🧾️ Download transcript
Summary
What makes an invasive plant species invasive? A lot of effort goes in to trying to understand the ecological and evolutionary underpinnings of invasive species. Multiple hypotheses have been put forward such as the novel weapons hypothesis and allelopathy, but what do the data tell us about these concepts? The answer is as nuanced as it is interesting. Join me and Dr. Robert Colautti as we explore novel weapons and allelopathy through the lens of purple loosestrife (Lythrum salicaria) and garlic mustard (Alliaria petiolata). This episode was produced in part by Joe, Diane, Kim, Tanya, Neil, Matthew, April, Dana, Lilith, Sanza, Eva, Yellowroot, Wisewren, Nadia, Heidi, Blake, Josh, Laure, R.J., Carly, Lucia, Dana, Sarah, Lauren, Strych Mind, Linda, Sylvan, Austin, Sarah, Ethan, Elle, Steve, Cassie, Chuck, Aaron, Gillian, Abi, Rich, Shad, Maddie, Owen, Linda, Alana, Sigma, Max, Richard, Maia, Rens, David, Robert, Thomas, Valerie, Joan, Mohsin Kazmi Photography, Cathy, Simon, Nick, Paul, Charis, EJ, Laura, Sung, NOK, Stephen, Heidi, Kristin, Luke, Sea, Shannon, Thomas, Will, Jamie, Waverly, Brent, Tanner, Rick, Kazys, Dorothy, Katherine, Emily, Theo, 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, 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 | Conversations like you're about to hear do not happen unless you support In Defensive Plants. |
| 0:04.4 | And now more than ever, we need conversations like this to reach as many ears as possible. |
| 0:08.9 | One of the best ways to help keep In Defensive Plants up and running is to become a patron over at patreon.com |
| 0:14.0 | slash In Defensive Plants. |
| 0:15.8 | In return for a tiny bit of support each month, you will get access to a completely separate |
| 0:20.2 | podcasts. It explores |
| 0:21.5 | a lot of really fun gardening topics, everything from seed collection and storage to growing native |
| 0:26.1 | plants, the struggles of trying to garden in different climates, and so much more. It's a heck of a lot of fun. |
| 0:32.2 | We're learning so much, and we're trying to share that with you. So come on and join the Patreon over |
| 0:36.7 | at patreon.com slash indefensive plants and help keep this show up and running in the process. I hope to see you over there. But in the meantime, on with the show. Hello everyone and welcome to the Endefensive Plants podcast, the official podcast of indefensibleplants.com. What's up? This is your host, Matt. Welcome to the show. How is everyone doing this week? I'm doing |
| 0:54.4 | great because we are diving into the world of some really interesting topics in ecology. Novel |
| 0:59.4 | weapons, olilopathy, competition. Why are invasive species invasive? Why do some plants get to a new |
| 1:05.5 | area and absolutely take over, whereas others just kind of sit in the background or never really |
| 1:10.3 | established in the first place. |
| 1:12.0 | There's a lot of really interesting metaphors that circulate and trying to communicate things about |
| 1:15.9 | this, but when you dive into the science, it is so much more nuanced and complicated than that. |
| 1:20.3 | And that is where people like Dr. Robert Kolati come in. |
| 1:23.5 | Dr. Kalati's lab is hard at work trying to understand how to ask these questions, how to analyze the data to get true answers out of what we're finding in the field, and also provide insights into some really cool big picture ideas surrounding ecology, evolution, and so much more. |
| 1:38.5 | This is a fun discussion and really thought-provoking, so let's just jump right into it. |
| 1:42.1 | Without further ado, here's my conversation with Dr. Robert Kolati. I hope you enjoy. All right, Dr. Robert Collotti. |
| 2:02.3 | Welcome to the podcast. |
| 2:03.3 | It is so great to have you here. |
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