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:3/28/2017)... 28, 2017 The report "Video ... Monitors, Servers, Storage Devices), Software (Video Analytics, VMS), and ... Global Forecast to 2022", published by MarketsandMarkets, the market ... is projected to reach USD 75.64 Billion by 2022, ... The base year considered for the study is 2016 ...
(Date:3/23/2017)... DUBLIN , Mar. 23, 2017 Research ... Anti-Theft System Market Analysis & Trends - Industry Forecast to 2025" ... ... to grow at a CAGR of around 8.8% over the next ... This industry report analyzes the market estimates and forecasts for all ...
(Date:3/20/2017)... , March 20, 2017 PMD Healthcare announces ... spirometer and Wellness Management System (WMS), a remote, real-time ... in 2010, PMD Healthcare is a Medical Device, Digital ... mission dedicated to creating innovative solutions that empower people ... that intent focus, PMD developed the first ever personal ...
Breaking Biology News(10 mins):
(Date:4/24/2017)... 24, 2017  Dante Labs announced today the offer of ... (ca. $900). While American individuals have been able to access ... can access WGS below EUR 1,000. The sequencing ... genetic information to make informed decisions about disease monitoring, prevention, ... ...
(Date:4/21/2017)... ... 21, 2017 , ... Having worked on the design of the innovative ... it to top lab design architects from around the country at the Lab Design ... Design and Engineering Greg Casey will be at the show, where they will highlight ...
(Date:4/21/2017)... ... April 21, 2017 , ... The impressively ... focus of researchers, engineers, product developers, and industry suppliers gathered last week for ... SPIE, the international society for optics and photonics , the event drew ...
(Date:4/21/2017)... ... , ... Frederick Innovative Technology Center, Inc. (FITCI), a business ... start-ups, is hosting “Celebration Friday” (a festive gathering highlighting client success stories) and ... networking at 3:30 p.m. at FITCI’s 4539 Metropolitan Court location, off English Muffin ...
Breaking Biology Technology:
Cached News: