'It’s actually not that hard to simulate a mass extinction,” said Emily Sessa, a plant systematist at the New York Botanical Garden. That’s exactly what her team is doing.
The La Brea Tar Pits were recognized as one of the world’s First 100 IUGS Geological Heritage Sites for their stunning Ice Age fossil record.“With the blechnum, what we saw was more of a cringy, slow loss of the leaves,” Baer said. “It appeared like it was sort of suffering.”An earlier version of this story misidentified the plant that was neither growing nor deteriorating. It was Sequoia sempervirens, or coast redwood, not metasequoia, or dawn redwood.
The first spring-green buds began to emerge alongside the withered brown remains within days of the light’s return. Two weeks later, fern fronds spilled from several pots, and the tiny sequoia and sycamore saplings once again had leaves. Alex Baer and Jarmila Pittermann examine ferns inside the greenhouse where they simulated the conditions of the K/Pg extinction event.Asked if ferns could be considered the cockroach of the plant world, Pittermann demurred, offering only that they are “resilient.” But they are an exceptionally hardy class of plants.
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