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:5/3/2016)... 2016  Neurotechnology, a provider of high-precision biometric ... Biometric Identification System (ABIS) , a complete system ... ABIS can process multiple complex biometric transactions with ... fingerprint, face or iris biometrics. It leverages the ... MegaMatcher Accelerator , which have been used ...
(Date:4/26/2016)... BANGALORE, India and LONDON ... Infosys Finacle, part of EdgeVerve Systems, a ... ), and Onegini today announced a partnership to ... banking solutions.      (Logo: http://photos.prnewswire.com/prnh/20151104/283829LOGO ... banks to provide their customers enhanced security to ...
(Date:4/15/2016)... CHICAGO , April 15, 2016  A ... companies make more accurate underwriting decisions in a ... offering timely, competitively priced and high-value life insurance ... health screenings. With Force Diagnostics, rapid ... and lifestyle data readings (blood pressure, weight, pulse, ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... June 23, 2016  Blueprint Bio, a company dedicated ... the medical community, has closed its Series A funding ... . "We have received a commitment from ... we need to meet our current goals," stated ... the runway to complete validation on the current projects ...
(Date:6/23/2016)... June 23, 2016 On Wednesday, June ... 4,833.32, down 0.22%; the Dow Jones Industrial Average edged 0.27% ... at 2,085.45, down 0.17%. Stock-Callers.com has initiated coverage on the ... Nektar Therapeutics (NASDAQ: NKTR ), Aralez Pharmaceuticals Inc. ... BIND ). Learn more about these stocks by ...
(Date:6/23/2016)... Prairie, WI (PRWEB) , ... June 23, 2016 ... ... consultancy focused on quality, regulatory and technical consulting, provides a free webinar ... is presented on July 13, 2016 at 12pm CT at no charge. , ...
(Date:6/23/2016)... 22, 2016  Amgen (NASDAQ: AMGN ) ... QB3@953 life sciences incubator to accelerate the development ... laboratory space at QB3@953 was created to help high-potential ... for many early stage organizations - access to laboratory ... Amgen launched two "Amgen Golden Ticket" awards, providing each ...
Breaking Biology Technology:
Cached News: