A diverse set of fossils from China shows that a complex marine ecosystem existed 251 million years ago, shortly after a mass extinction wiped out most complex life on Earth
at the University of Leeds, UK, says this fossil collection is full of exciting new discoveries, especially the shrimp and lobster, which hadn’t been seen in the Early Triassic before. But he thinks that the study’s authors are overstating the speed of the recovery. While there are lots of different fish, the diversity of species on the seafloor is still rather modest, with some way to go before it would reach modern levels of diversity, he says.
Taken together with other fossil records, Bottjer says this shows that the recovery was probably patchy, with marine communities in some parts of the world recovering more quickly than in others. “It’s the same thing we see in today’s environmental crises,” he says. “Some places are affected more than others.”
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