Fåglar påverkas av uppvärmningen. USAs nötväcka har i stor omfattning flyttat till Kanada. Vart skall de ta vägen sedan när det blir ännu varmare?
Climate change: It’s not for the birds
Over the past 90 years, during the Christmas season (Dec. 14-Jan. 5), citizen scientists do what the Audubon Society calls a Christmas Bird Count, kind of a census. Volunteers literally choose one 24-hour period and count birds in a 15-mile diameter. The society takes the 140 million bird observations and sort 89 species of Eastern U.S. birds into groups. They found that all the bird groups are responding to climate change -- temperature and precipitation. Large birds were found to be migrating farther north than previously and those birds that are highly dependent on their habitat (like grasslands or wetlands) are finding it more challenging to locate the perfect spot.
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The study’s lead author, Sarah Saunders, uses mathematical and statistical tools to study birds. She analyzed 90 years of Christmas Bird Counts with at least one conclusion: “Birds tell us that climate change is already having an effect on them, but not all birds are equally vulnerable to climate change. If we want to give birds the best chance at survival, habitat conservation needs to be part of our efforts to fight climate change. We can still secure a future for birds and people, but the science is clear: we need to act on climate now.”
https://www.click2houston.com/weather/2022/01/28/climate-change-its-not-for-the-birds/