Carnivorous plants respond to increased soil nitrogen, eco-news websites completely miss the point

Flowers of a venus flytrap. Photo by Andrew David Thaler.

Flowers of a venus flytrap. Photo by Andrew David Thaler.

Late last week, inspired by our newly flowering Venus Flytraps, I posted pictures of Amy and my carnivorous plant collection on twitter and on the Southern Fried Science Facebook page. After David’s recent post on a nurse shark that underwent major dietary changes following traumatic surgery and captivity, our wonderful readers must have been on high alert for trophic shifts following anthropogenic disturbance-type articles (or, more casually, “stuff that eats stuff now eats different stuff”), because this morning my inbox was filled with links to variations on the following article: Pollution makes carnivorous plants go vegetarian. Whenever human activity alters trophic interactions, there is potential for major ecological changes in an ecosystem. While ecosystems are dynamic, shape by continuous variation in community structure and resource and habitat variability, rapid changes can result in total collapse or permanent shifts to functional states.

Unfortunately, these “eating different stuff” articles rarely reflect the deep and nuance ecologic reality of trophic interactions and instead capitalize on the narrative of “even animals are going veggie to save the planet!” Allow me to revel in my cultural roots with a hearty “Oy vey!”

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Biodiversity Wednesday: Flesh eaters of the Savanna

Red-cockaded Woodpecker in Croatan Forest. Photograph by Andrew David Thaler.

The wet, temperate understory of a longleaf pine savanna, is not the first place one would thing to search for some of nature’s most fearsome predators. These maritime ecosystems stretch down the Atlantic seaboard, from southern Virginia to northern Georgia, but are most common in North and South Carolina. Boomerang-shaped bays, called Carolina bays, formed behind ancient sand dunes, provide the foundation for these biodiversity rich regions. More than 50 endangered species are native to the Carolina lonfleaf pine savannas, including the Cape Fear Threetoothed land snail and the iconic Red-cockaded Woodpecker, but among the most evocative inhabitants of these pocosin wild-lands are the many-jawed monsters of the the understory – the Venus Flytrap.

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