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:10/16/2014)... new synthesis of recent research findings to inform their ... two states. , The Ecology and Management of ... Synthesis of the Relevant Biophysical Science and Implications for ... the U.S. Forest Service,s Pacific Northwest Research Station, is ... a synthesis of the large body of scientific information ...
(Date:10/16/2014)... be cultivated efficiently, they are anything but sustainable: ... monoculture cultivation is becoming increasingly evident. Despite their ... and are regarded as the sole possibility of ... wrongfully, finds Bernhard Schmid, an ecology professor at ... form of agriculture and forestry. After all, a ...
(Date:10/16/2014)... 2014) – Post-menopausal women experienced improvements in vaginal ... or genital bleeding, after 12 weeks of daily ... soy germ-based nutritional supplement previously shown to help ... peer-reviewed pilot study reported in a poster at ... meeting. , "These data documented improved vaginal ...
Breaking Biology News(10 mins):New report synthesizes best available science on management of moist mixed-conifer forests 2Plant communities produce greater yield than monocultures 2Plant communities produce greater yield than monocultures 3S-equol supplements associated with improved measures of reproductive health in postmenopausal women 2
... commercially prized fish from the depths of the world's ... ability to recover is constrained by the fishes' long ... said today at the annual meeting of the American ... fish species living at depths greater than 500 meters ...
... way to fight leukemia might be to knock out a ... study shows. , The findings suggest that a drug ... be an effective therapy. , But such a ... offer an effective one-two punch against drug-resistant forms of chronic ...
... Uganda who self-paid for their antiretroviral medications experienced interruptions ... supply logistical disruptions. These treatment interruptions led to ... , These findings by a team led by researchers ... and UCSF are reported in the April 22, 2007 ...
Cached Biology News:Long-lived deep-sea fishes imperiled by technology, overfishing 2Long-lived deep-sea fishes imperiled by technology, overfishing 3Knocking out survival protein could aid leukemia treatment 2Resistance to anti-HIV drugs in Uganda developed due to drug supply problems 2
(Date:10/22/2014)... October 21, 2014 The North American ... market North America with analysis and forecast of revenue. ... and is expected to reach $623.6 million by 2018, ... , Browse through the TOC of the North American ... the in-depth analysis provided. This also provides a glimpse ...
(Date:10/22/2014)... 2014 Currently offering a comprehensive ... D Weighing, Rice Lake, and Ohaus, Pipette.com has ... The Sartorius CPA Semi-Micro Balance is ideal for ... and user-friendly laboratory balance. , Sartorius is a ... laboratory balances are well known for their high ...
(Date:10/22/2014)... 22, 2014   Synthetic Biologics, Inc. (NYSE ... for serious infections and diseases, announced today that the ... of Allowance for a composition of matter patent application ... program, SYN-004. This is Synthetic Biologics, first allowed ... and adds to the Company,s extensive C. difficile ...
(Date:10/22/2014)... and HONG KONG , ... rare disease therapeutics enterprise, announced today that rare disease ... company as vice president, research. Dr. McKew brings more ... key leadership positions at the National Institutes of Health, ... acquisition by Wyeth). Dr. McKew will lead aTyr,s efforts to ...
Breaking Biology Technology:The North American crystal oscillator market is expected to reach $623.6 million by 2018 - New Report by MicroMarket Monitor 2The North American crystal oscillator market is expected to reach $623.6 million by 2018 - New Report by MicroMarket Monitor 3The North American crystal oscillator market is expected to reach $623.6 million by 2018 - New Report by MicroMarket Monitor 4Pipette.com Launches the Addition of Sartorius CPA Semi-Micro Balance to Their Product Portfolio with Special Promotional Pricing 2Pipette.com Launches the Addition of Sartorius CPA Semi-Micro Balance to Their Product Portfolio with Special Promotional Pricing 3Synthetic Biologics Announces Allowance of Key U.S. Composition of Matter Patent for C. difficile Program 2Synthetic Biologics Announces Allowance of Key U.S. Composition of Matter Patent for C. difficile Program 3Synthetic Biologics Announces Allowance of Key U.S. Composition of Matter Patent for C. difficile Program 4aTyr Pharma Appoints John C. McKew, Ph.D., as Vice President, Research 2aTyr Pharma Appoints John C. McKew, Ph.D., as Vice President, Research 3
... ... News series, “The Nanotech Gamble,” with advice for nano-product companies on how to turn ... ... AOL News articles questioning the oversight of nanotechnology product safety ( http://www.aolnews.com/category/nanotech/ ), nanoTox ...
... New, ... that is both sugar and allergen-free. , ... San Leandro, CA (PRWEB) April 6, 2010 -- Intensive ... to introduce NutriYummies, a Children,s Chewable Multivitamin that is uniquely sugar-free, allergen-free ...
... ... "Flexible Fuel" cars, as would be required by Open Fuel Standard Act ... stricter fuel efficiency standards announced today by President Obama at a fraction ... energy independence challenged the President to show his commitment to energy ...
Cached Biology Technology:nanoTox COO Greg King Advises Nanotech Companies to View Safety Concerns as an Opportunity to Gain Consumer Trust 2nanoTox COO Greg King Advises Nanotech Companies to View Safety Concerns as an Opportunity to Gain Consumer Trust 3Intensive Nutrition Introduces NutriYummies, Innovative Children's Chewable Multivitamin 2Challenge President to Adopt Energy Measure with Double the Impact of Improved Auto Fuel Efficiency Standards at Fraction of the Cost 2
Caliper offers a wide array of standard LabChip products designed to be used in combination with our AMS 90 and LabChip 3000 microfluidic platforms....
... analysis kit for 10 chips provides the ... analysis with the Experion automated electrophoresis system. ... 3 x 520 microliters Pro260 gel, 45 ... (10-260 kD), 400 microliters Pro260 sample buffer, ...
... expertise that made the original Gene Pulser apparatus ... available has been applied in the Gene Pulser ... modular design of the Gene Pulser II system ... that has the widest range of settings to ...
Experion Pro260 chips are the microfluidic chips used to perform protein analysis with the Experion automated electrophoresis system. Each chip has the capacity to run 10 protein samples. Supplied as...
Biology Products: