ecology, reveals that by understanding how species move, you can predict if and how corridors work.
"The design and scale of this study are remarkable," said Orrock. 'Nothing has been done like this for plants before. It's the largest, best-replicated study of corridors in the world. "
"We knew coming into this study that corridors work, but we wanted to predict how they work for species, based on simple life history traits that are readily available," said Damschen, who painstakingly counted 300 different plant species that have occupied the patches since 2000 when the research began. "One of the important things we show is not only how a corridor works and affects a community of species in a single year or a few years, but how they work over much longer time scales."
Patches
In general, the researchers found that, overall, there were more species in the patch connected by a corridor than the unconnected ones. But they predicted that groups of species would respond differently depending on how they were moved around the landscape. Seeds are dispersed by wind, birds, or they move almost imperceptibly, dropping a few inches away from the parent plant, and thus are called unassisted.
Damschen can tell the source of dispersal by seed type. Wind-dispersed plants have a fuzzy feature, like a dandelion, called a pappus; bird-dispersed plants have fleshy fruits, and unassisted plants have plain, dull, little round seeds, similar to poppy seeds.
For birds, the researchers had great predictive power. There were more bird-dispersed species in the connected then in either the unconnected rectangle or winged patches, which was the result of a detailed understanding of how birds move and forage.
For wind-dispersed plants, the researchers predicted that patch shape an increase in habitat edges relative to cores would increase the number of species in the community.
'/>"/>
| Contact: Ellen Damschen damschen@wustl.edu 31-409-359-106 Washington University in St. Louis Source:Eurekalert |
Related biology news :
1. Childhood obesity indicates greater risk of school absenteeism, Penn study reveals
2. A study by the MUHC and McGill University opens a new door to understanding cancer
3. Study begins to reveal clues to the cause and progression of sepsis
4. Clones on task serve greater good, evolutionary study shows
5. New study warns limited carbon market puts 20 percent of tropical forest at risk
6. New study examines how rearing environment can alter navigation
7. Study links cat disease to flame retardants in furniture and to pet food
8. New continent and species discovered in Atlantic study
9. Study shows link between alcohol consumption and hiv disease progression
10. Feeling hot, hot, hot: New study suggests ways to control fever-induced seizures
11. Study finds environmental tests help predict hospital-acquired Legionnaires disease risk
| Copyright © 2003-2012 Bio-Medicine. All rights reserved. ABOUT | CONTACT US | DISCLAIMER | PRIVACY POLICY | TERMS AND CONDITIONS |  |