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[The Scientific Mystery of Duckweed and the Wonders of Symbiosis]-[Duck Duck Poop! - A Tale Of Symbiosis (encore)]

Wow in the World · B1 · 2020-01-13

Preschool Enlightenment
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📋 Summary

The Scientific Mystery of Duckweed's Journey

In this episode of Wow in the World, Mindy and Guy Raz explore a fascinating biological mystery: how does the tiny flowering plant known as Wolffia columbiana—commonly referred to as duckweed—suddenly appear in isolated ponds? Mindy presents a story about a duck that consumes this "teeniest, tiniest" plant and then travels to other ponds, seemingly planting the vegetation through its own waste.

Initially, this phenomenon sounds like "magical poop," but the hosts pivot to "cold, hard science" to explain the reality. Scientists, including Guilherme Silva from Unicinos University in Brazil, investigated whether duckweed could survive the passage through a bird's digestive system. By collecting duck feces and analyzing them in a laboratory setting, researchers made a "wow" discovery: the duckweed bulbs remained "completely intact" and, when placed in a Petri dish, they continued to grow and multiply. This suggests that the plant's structure allows it to withstand stomach acids, effectively using the duck as a mode of transportation to colonize new wetlands.

Understanding Symbiosis: Mutualism, Commensalism, and Parasitism

Following the duck story, the hosts delve into the concept of symbiosis, defined as the "close relationship between two different organisms or living things." They categorize these interactions into three distinct types:

  1. Mutualism: A relationship where both organisms benefit. The duck and the duckweed serve as a perfect example: the duck gains a food source, while the duckweed gains a way to disperse its seeds to new environments. Another classic example provided is the relationship between plants and pollinators, where bees and birds get nectar, and plants get fertilized.
  2. Commensalism: A relationship where one species benefits while the other is "neither helped nor harmed." Mindy humorously describes this as eating pizza crusts from a compost bin—she gains a snack, while the original owner loses nothing of value.
  3. Parasitism: A relationship where one organism benefits at the expense of the other. The hosts cite examples like fleas or ticks on animals, or fungi that thrive by sucking the life out of garden plants. Mindy also jokes about her past interactions with Guy Raz, such as shaving his eyebrows, as a form of "symbiotic parasitism."

Conclusion

The episode highlights that nature is full of "scientific mysteries" that reveal themselves as we observe the world more closely. Whether it is the resilient nature of Wolffia columbiana surviving digestion or the complex ways species interact, Wow in the World emphasizes that "life, uh, finds a way." The show concludes with a segment featuring young listeners sharing their own "wows," ranging from owl anatomy to the chemical composition of humans being made of the same materials as stars, reinforcing the show's mission to inspire curiosity about the natural world.

🎯Key Sentences

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It's going to be a November to remember.
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I still haven't passed it.
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📝Key Phrases

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music to your ears
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get on with the show
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long overdue
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give a round of applause
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take a turn for the wow
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📖 Transcript

Grownups, Wondery Plus subscribers can listen to Wow in the World early and ad-free right now.
Join Wondery Plus in the Wondery app or Wondery Kids Plus on Apple Podcasts.
Hey, Wowzer fans, Mindy here.
And before we start the show, I got to let you know that this November, with a special new episode featuring our friends at Circle Round and Terrestrials on Radiolab for Kids,
And don't miss when Elmo from Sesame Street stops by Wow in the World to make us all belly laugh on November 24th.
Oh, but that's not all, Reg.

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