Navigation Links
Climate change, increasing temperatures alter bird migration patterns

Birds in eastern North America are picking up the pace along their yearly migratory paths.

The reason, according to University of North Carolina at Chapel Hill researchers, is rising temperatures due to climate change.

Using migration information collected in eBird, a citizen science program database containing 10 years' worth of observations from amateur birdwatchers, assistant professor of biology Allen Hurlbert, Ph.D., and his team in the UNC College of Arts and Sciences analyzed when 18 different species of birds arrived at various points across their migration journeys. Since 2002, eBird has collected more than 48 million bird observations from roughly 35,000 contributors.

The study results were published in the journal PLoS ONE on Wednesday (Feb. 22).

Pushing migration earlier in the year could negatively affect birds over the long term, Hurlbert said.

"Timing of bird migration is something critical for the overall health of bird species," he said. "They have to time it right so they can balance arriving on breeding grounds after there's no longer a risk of severe winter conditions. If they get it wrong, they may die or may not produce as many young. A change in migration could begin to contribute to population decline, putting many species at risk for extinction."

To minimize these threats, Hurlbert said he hoped the findings would be used to increase awareness around bird conservation. The outcomes also could help scientists identify which parts of the eastern United States will experience the greatest migration shifts, as well as which species face the largest dangers because they will be least likely to adapt successfully to climate change.

Although eBird only contains a decade of amateur-submitted data, versus several decades of data compiled by select bird observatories, the information it contains provides greater geographic coverage. Hurlbert's team focused on bird species that occur over the entire breadth of the eastern U.S. By reviewing the recorded temperatures and the exact dates on which bird watchers first noticed certain species in their areas, the researchers determined how closely bird migration tracks year-to-year variation in temperature.

On average, each species reached various stopping points 0.8 days earlier per degree Celsius of temperature increase. Some species' schedules accelerated by as much as three to six days for each rising degree. To date, the Northeast has experienced more relative warming than the Southeast.

According to the review, Hurlbert said, the speed at which a species migrates is the biggest influence on how strongly it responds to increasing temperatures. Slow migrators, such as the red-eyed vireo or the great crested flycatcher, were the most adaptable to changes. Additionally, the length of the migration path affects how quickly birds move from one location to another.

"It makes sense that if you take your time to move north, you're sort of checking out the surroundings around you," he said. "If the conditions seem too cold, you can decide there's no point in moving on that day. Species that tended to advance quickly, as well as those migrating from greater distances, such as Central or South America, were less able to adapt to temperature changes."

However, being a slow traveler does not free a species from all climate change-induced migration challenges. Because they stay in one spot longer, such birds have heavier habitat and food requirements, making them more dependent upon the resources that are available along their paths. That reliance could become a greater problem if climate projections for the next 50 years to 75 years hold true, Hurlbert said. Climatologists predict the Northeast will continue to warm at a faster pace than the Southeast, potentially forcing slow migrators to move even slower and put greater strain on their migratory routes.

"There's a lot of concern in the scientific community about climate change and how it will affect living things," he said. "This is a really useful data set that can likely address these anxieties around birds."


Contact: patric lane
University of North Carolina at Chapel Hill

Related biology news :

1. Long-term study shows effect of climate change on animal diversity
2. White Mountain Research Station to host climate change conference
3. Researchers find animal with ability to survive climate change
4. Severe climate change costs forecast for Pennsylvania, N.C., Tennessee, N.D.
5. Experts discuss climate change during UH lecture series
6. Dont blame cities for climate change, see them as solutions
7. Green coffee-growing practices buffer climate-change impacts
8. Brookhaven scientists take off for southeastern Pacific climate study
9. Himalaya -- Changing Landscapes photo exhibition draws attention to the impacts of climate change
10. British scientists go cloud-hopping in the Pacific to improve climate predictions
11. Northwest climate change is target of $3.2M in grants to University of Oregon
Post Your Comments:
(Date:10/12/2015)... Hoyos Labs , ... will introduce its new biometric four-finger (4F) ... providing an unprecedented level of security / ... new biometric standard for secure transactions (BOPS). ... financial services to healthcare are implementing Hoyos, ...
(Date:10/12/2015)... Oct. 12, 2015 Research and Markets ... the "Iris Recognition Market by Component (Hardware ... Control & Others), Industry (Travel & Immigration, Military ... Forecast to 2020" report to their offering. ... Iris Recognition Market worth 3627.90 Million USD ...
(Date:10/8/2015)... Oct. 8, 2015 Synaptics Inc. (NASDAQ: ... solutions, announced today that it will report financial ... on Thursday, October 22, 2015, after the close ... conference call for analysts and investors at 2:00 ... may discuss forward-looking information. ...
Breaking Biology News(10 mins):
(Date:10/12/2015)... SAN FRANCISCO , October 12, 2015 ... reach USD 6.49 billion by 2022, according to a new ... can be attributed to rise in incidence of oncology diseases ... detection market is expected to reach USD 6.49 billion ... Research, Inc. This growth in demand can be attributed to ...
(Date:10/12/2015)... 12, 2015  Patara Pharma, a clinical-stage biotechnology ... diseases and conditions, today announced the closing of ... Concurrent with the close of its sale of ... and Security Agreement with Silicon Valley Bank whereby ... Patara will use the funds from the financing ...
(Date:10/12/2015)... Belgium , Oct. 12, 2015 VolitionRx ... from a completed clinical study of its NuQ ® ... in the online issue of Clinical Epigenetics , the ... was conducted in collaboration with Lund ... Roland Andersson , MD, PhD, Professor of Surgery and Vice-Dean, ...
(Date:10/12/2015)... (PRWEB) , ... October 12, 2015 , ... LifeTrak ... the launch of LifeTrak Zoom, the world’s first amphibious fitness tracker that seeks to ... offers flexwear technology and accurate heart rate monitoring both in water and ...
Breaking Biology Technology: