HOME >> BIOLOGY >> NEWS
Migratory songbird breeding linked to winter habitat

For several decades, scientists studying the population dynamics of migratory birds have debated the relative importance of events in summer breeding areas versus tropical wintering grounds. Now, in a Dartmouth study reported in the Dec. 4 issue of the journal Science, Peter Marra and colleagues provide evidence that what happens in the tropical forests where migrant warblers spend their winters and what happens in the Northern woods where they spend the next summer are inextricably linked.

Research on the population dynamics of migratory birds has been hampered by the difficulty of tracking individual birds throughout their annual cycle across thousands of miles. By using carbon isotopes as a habitat signature, the investigators in this study were able to link American redstarts at Hubbard Brook Experimental Forest in the White Mountains of New Hampshire with the habitats they occupied the preceding winter. "We've found that the quality of the winter habitat affects not only when birds fly north to the breeding grounds but what condition they're in upon arrival. Both are crucial factors in how well the birds do on their summer breeding grounds," says Marra, who is now Postdoctoral Fellow at the Smithsonian Migratory Bird Center in Washington, D.C. "Clearly, natural selection is acting on these birds year-round."

Marra conducted this research as a graduate student with Richard Holmes, Harris Professor of Environmental Biology at Dartmouth, and their colleague, Keith Hobson, Research Scientist at the Prairie and Northern Wildlife Research Center in Saskatoon, Canada.

Previous studies have found that males in many migratory species arrive at the North American breeding grounds before females and that males in the best condition arrive earlier. These earlier arriving individuals have a competitive edge in reproducing: first choice of prime nesting sites and mates and an opportunity to replace eggs
'"/>

Contact: Nancy Serrell
nancy.serrell@dartmouth.edu
603-646-2117
Dartmouth College
3-Dec-1998


Page: 1 2 3

Related biology news :

1. Exotic Species, Migratory Birds, Sea Level Rise, Wetlands, And Contaminants...USGS Scientists Discuss Innovative Chesapeake Bay Restoration Studies
2. Sleepless over Seattle: Migrating songbirds forgo sleep but keep their wits
3. Global warming may cause songbirds to avoid certain foods
4. Researchers find new form of hormone that helps songbirds reproduce
5. Unfaithful songbirds increase offspring fitness
6. More raccoons may mean fewer songbirds
7. Clover strip-cropping in cotton provides critical habitat for threatened songbirds
8. Unwanted HRT playing havoc with songbirds
9. Fragmentation may limit songbird sex lives
10. Male and female songbirds show big learning differences
11. Research indicates global warming could impact songbird populations

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/10/2016)... 2016   Unisys Corporation (NYSE: UIS ) ... (CBP) is testing its biometric identity solution at the Otay ... to help identify certain non-U.S. citizens leaving the country. ... to help determine the efficiency and accuracy of using biometric ... will run until May 2016. --> the ...
(Date:3/9/2016)... 9, 2016 Nigeria ... more than 23,000 public service employees either did not ... their salary unlawfully.    --> Nigeria ... that more than 23,000 public service employees either did ... receiving their salary unlawfully.    --> DERMALOG, ...
(Date:3/8/2016)... N.C. , March 8, 2016   ... sensor technology, today announced it has secured $11M ... by GII Tech, a new venture fund being ... with additional participation from existing investors TDF Ventures ... the funds to continue its triple-digit growth and ...
Breaking Biology News(10 mins):
(Date:5/26/2016)... ... May 26, 2016 , ... ... cuvettes are used in leading laboratories all over the globe. Their cute firefly ... addition to manufacturing awesome cuvettes, FireflySci makes spectrophotometer calibration standards that never require ...
(Date:5/25/2016)... ... May 25, 2016 , ... ... (RFI) issued by the Office of the National Coordinator for Health IT (ONC) ... determines if clinically relevant data were available when and where it was needed. ...
(Date:5/24/2016)... ... May 24, 2016 , ... Cell therapies for ... be accelerated by research at Worcester Polytechnic Institute (WPI) that yielded a newly ... tissue regeneration. , The novel method, developed by WPI faculty members Raymond Page, ...
(Date:5/23/2016)... ... May 23, 2016 , ... ... Precision Farming in 2017 and Beyond. The paper outlines the key trends that ... ag industry. , “We’ve witnessed a lot of highs and lows as the ...
Breaking Biology Technology:
Cached News: