This latest revelation about the impact of climate change was made possible by a hobby that’s long gone out of fashion: egg collecting.
The Field Museum's historic egg collection is shedding new light on climate change.
The resulting analysis revealed that approximately one-third of the 72 species studied are laying their first eggs an average of 25.1 days earlier than they were 100 years ago.The team obtained long-term data on carbon dioxide levels in the atmosphere, which corresponds to temperature trends, and found that it correlated with changes in egg-laying dates.
But the complexity of bird biology and behavior, and their relationship to other organisms within a broader ecosystem, raises all sorts of questions about whether earlier nesting leaves them more or less vulnerable to climate change, he said. “There are all kinds of really important nuances that we need to know about in terms of how animals are responding to climate change,” he said.
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