Navigation Links
Wiping out the world's mass migrations
Date:6/1/2009

Densely packed wildebeests flowing over the Serengeti, bison teeming across the Northern Plainsthese iconic images extend from Hollywood epics to the popular imagination. But the fact is, all of the world's large-scale terrestrial migrations have been severely reduced and a quarter of the migrating species are suspected to no longer migrate at all because of human changes to the landscape. A recently published research paper highlights this global change and presents the first analysis of the dwindling mass migrations.

"Conservation science has done a poor job in understanding how migrations work, and as a result many migrations have gone extinct," says Grant Harris of the Center for Biodiversity and Conservation at the American Museum of Natural History, first author of the paper in Endangered Species Research. "Fencing, for example, blocks migratory routes and reduces migrant's access to forage and water. Migrations can then stop, or be shortened, and animal numbers plummet."

Migrations of large-bodied herbivores (also called ungulates) occur when animals search for higher quality or more abundant food. Ecologically, there are two primary drivers of food availability. In temperate regions of the world, higher-quality food shifts predictably as the seasons change, and animals respond by moving along well-established routes. For savannah ecosystems, rain and fire allow higher-quality food to grow. This is a less predictable change that animals must track across expansive landscapes.

Human activity now prevents large groups of ungulates from following their food. Fencing, farming, and water restrictions have changed the landscape and over-harvesting of the animals themselves has played a role in reducing the number of migrants.

To assess the impact of human activity on migrations throughout the world, Harris and his co-authors gathered information on all 24 species of large (over 20 kilograms) ungulates known for t
'/>"/>

Contact: Kristin Elise Phillips
kphillips@amnh.org
212-496-3419
American Museum of Natural History
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Quantum weirdness, parallel worlds, dinosaur poop, and the ultimate fate of the universe...
2. The best both of worlds -- how to have sex and survive
3. Team IDs genesis of mass migrations
4. UNH researchers track lobster migrations to improve population estimates
5. Environmental setting of human migrations in the circum-Pacific Region
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Wiping out the world's mass migrations
(Date:8/21/2014)... Carolina State University have developed a novel and versatile ... applications for creating new materials as well as for ... technique allows us to model much larger and more ... quickly," says Nan Li, lead author of a paper ... State,s Department of Materials Science and Engineering. "This is ...
(Date:8/20/2014)... Institute (HCI) at the University of Utah have identified ... BCR-ABL, the unregulated enzyme driving the blood cancer chronic ... nearly 6,000 new cases of CML will be diagnosed ... kinase inhibitors (TKIs), target BCR-ABL and are effective at ... control it in a way that allows patients to ...
(Date:8/20/2014)... visible in in this image of the Para and ... were most likely intentionally set in order to deforest ... or stand of trees where the land is thereafter ... conversion of forestland to farms, ranches, or urban use. ... of the Amazon Rainforest in the middle of the ...
Breaking Biology News(10 mins):Researchers develop models to study polyelectrolytes, including DNA and RNA 2Blueprint for next generation of chronic myeloid leukemia treatment 2
... serious and growing environmental problem, especially on the Indian ... years ago, used genetic techniques to create "arsenic-eating" plants ... was a problem, however. The arsenic sequestered from soil ... it difficult to harvest for safe disposal. Now, the ...
... from the University of Montana, University of California - ... have shown that a top predator strongly affected plants ... web by eating organisms that transport nutrients between ecosystems. ... by thwarting nutrient subsidies," is published in the February ...
... Antiretroviral therapy (ART) for infants born with HIV infection ... five months of life, according to a study published ... Infectious Diseases, now available online. , Uncertainty over when ... from their mothers revolves around balancing the benefits of ...
Cached Biology News:Researchers discover way to transport environmental arsenic to plant leaves in new clean-up strategy 2Not just the birds 2Not just the birds 3New study shows benefit of early therapy in HIV-infected infants 2
(Date:8/21/2014)... New Rochelle, N.Y. (PRWEB) August 21, 2014 ... it is the first private college in the Mid-Hudson ... The College will now begin accepting applications from qualified ... , “We are very pleased to have been ... to support Governor Cuomo’s transformative initiative to stimulate economic ...
(Date:8/21/2014)... Aug. 21, 2014 OTC Markets ... Inc., a biotechnology company, on its approval to ... traded on OTCQX®, the best marketplace for established ... Group. Logo - http://photos.prnewswire.com/prnh/20110118/MM31963LOGO ... successful execution of its growth strategy and achievement ...
(Date:8/21/2014)... Chester, NJ (PRWEB) August 21, 2014 ... of personal selling optimization technology and services for ... publication of “Grading Pharma’s Use of New Commercial ... of Measurement & Analytics. , The article examines ... marketing yield that are being tested in the ...
(Date:8/21/2014)... (PRWEB) August 21, 2014 ... has been recognized as one of the nation’s ... 5000 magazine for the 2nd consecutive year. Inc. ... 33rd annual Inc. 500|5000, an exclusive ranking of ... the most comprehensive look at the most important ...
Breaking Biology Technology:The College of New Rochelle Becomes First Private College in Mid-Hudson Region to Earn START-UP NY Designation 2The College of New Rochelle Becomes First Private College in Mid-Hudson Region to Earn START-UP NY Designation 3OTC Markets Group Congratulates Immune Pharmaceuticals on NASDAQ Listing 2Pursuit's Peter Robinson Publishes "Grading Pharma's Use of New Commercial Sales Models" 2SoundConnect Returns on Inc. 5000 List of Fastest Growing Companies 2SoundConnect Returns on Inc. 5000 List of Fastest Growing Companies 3
... the past month, I've seen a half dozen great ... technology market. The products vary widely from unique hardware ... mobile services and beyond. Each concept is carefully conceived ... and each product meets a real and unfulfilled need ...
... At a meeting Monday highlighting university-business partnerships in Wisconsin, ... company based in Hartland, Wis., demonstrated its latest tool ... secretary of commerce for the U.S. Patent and ... R-Wis. The nations highest ranking patent official also met ...
... about asking whether technology drives business or business drives technology. ... Silence all the rattling about how superior this technology is ... certain questions that if you have to ask, you probably ... more satisfying line of inquiry is how much of your ...
Cached Biology Technology:Where have all the angels gone? 2Where have all the angels gone? 3Where have all the angels gone? 4Sensenbrenner and USPTO Director highlight benefits of technology transfer 2Sensenbrenner and USPTO Director highlight benefits of technology transfer 3Technology as the engine of business innovation 2Technology as the engine of business innovation 3
...
...
Mouse polyclonal antibody to TNPO2 - transportin 2 (importin 3, karyopherin beta 2b)...
Mouse monoclonal antibody to CDC2L5 - cell division cycle 2-like 5 (cholinesterase-related cell division controller)...
Biology Products: