On New Zealand’s North Island, in the Waitomo region, a team of researchers made a sensational discovery — a unique complex of fossils dating back over a million years. This finding allows for a rethinking of the evolutionary processes that shaped New Zealand’s prehistoric ecosystems long before humans arrived in these lands.
This is reported by Finway
What Species Are Preserved in the Ancient “Taphonomic Reservoir”
The discovered cave system has become a kind of natural trap, or “taphonomic reservoir,” creating ideal conditions for preserving even the most fragile remains. In these deposits, researchers found fossils of 12 species of birds and 4 species of frogs. Among these species are many that went extinct long before humans appeared on the island, indicating significant natural changes in the region’s ecosystems.
“According to paleontologist Trevor Worthy, between one-third and one-half of the identified species disappeared long before humans arrived on the islands. This indicates large-scale natural transformations of ecosystems.”
Discovery of New and Extinct Species
One of the most interesting results of the research is the discovery of a new species of parrot, Strigops insulaborealis, believed to be an ancient relative of the modern kakapo. Detailed analysis of the remains showed that this species had a different mode of movement than its current relatives. Additionally, scientists identified an ancestor of the modern takahē, as well as an extinct species of pigeon. According to paleontologist Paul Scofield, changes in habitats — from forested to shrubby — forced local bird populations to either evolve or go extinct.
The age of the cave was determined through the analysis of layers of volcanic ash that lay between two major eruptions. One of these layers is associated with events approximately 1.55 million years ago, while the other is linked to the period of activity in the Taupo volcanic zone. Thus, researchers established that this cave is the oldest known on the North Island.
This discovery fills an important gap in understanding the evolution of New Zealand’s fauna. The fossils indicate that significant changes in biodiversity occurred due to climatic fluctuations and volcanic activity long before humans appeared. According to scientists, these remains represent a kind of “missing volume” in the country’s natural history and will serve as a starting point for future research into ancient ecosystems in New Zealand.