News / Science & Technology

Decline of Large Predators Could Have Ripple Effects for Wider Environment

File - A leopard yawns inside its enclosure at the Madrid Zoo July 23, 2013.
File - A leopard yawns inside its enclosure at the Madrid Zoo July 23, 2013.

Related Articles

Civilian Drones Raise Hopes, Questions in Africa

Engineers and entrepreneurs say unmanned aerial vehicles could do so much more than just track the bad guys

China Destroys 6 Tons of Illegal Ivory

Environmental activists say public destruction sends powerful message to would-be smugglers, consumers that such trade will no longer be tolerated
VOA News
Falling numbers of apex predators like wolves and mountain lions might be good news for the animals those carnivores prey on. But the resulting growth in populations of those carnivores eat has a negative impact on the wider environment.

More than 75 percent of the world’s large carnivores are declining, according to a new study.

“Globally, we are losing our large carnivores,” said William Ripple, lead author of the paper and a professor in the Department of Forest Ecosystems and Society at Oregon State University in a statement. “Many of them are endangered. Their ranges are collapsing. Many of these animals are at risk of extinction, either locally or globally.”

Large carnivores have largely been eliminated from the developed world, and Southeast Asia, southern and East Africa and the Amazon basin were areas seeing a decline in the species. And the effects of the losses could have wider ramifications.

“Ironically, they are vanishing just as we are learning about their important ecological effects,” added Ripple.

According to the Oregon State announcement, researchers documented the impact of cougars and wolves on the regeneration of forests and other flora around streams and rivers in Yellowstone National Park. The decline of predators led to an increase in “browsing animals such as deer and elk,” which leads to a “disruption of vegetation as well as “shifting” birds and other small mammals.

Similar effects have been seen in other areas where the Eurasian lynx, dingoes, lions and sea otters have been in decline, according to the research.  A lack of lynx has led to more roe deer, red fox and hare. The decline of lions and leopards led to an increase in olive baboons, which pose a threat to agriculture. In the waters off southeast Alaska, the loss of sea otters resulted a rise in sea urchins and the loss of kelp beds

There is hope, however, according to study. The researchers found that in some cases where large predators are reintroduced, such as the wolf restoration in Yellowstone, ecosystems show signs of recovery.

“I am impressed with how resilient the Yellowstone ecosystem is,” Ripple said. “It isn’t happening quickly everywhere, but in some places, ecosystem restoration has started there.”

You May Like

At Khmer Rouge Court, Long-Awaited Verdict Approaches

First phase of trial, which is coming to an end, has focused on forced exodus of Phnom Penh in 1975 - and now many are hopeful justice will be served More

Video When Fighting Eases, Gazans Line Up at Bakeries

When there is a lull in the conflict, residents who have been hunkered down in their apartments rush out to stock up on food and other necessities More

Video Information War Rages Alongside Real One in Ukraine

Downing of Malaysian airliner, allegations of cross-border shelling move information war in war-torn country to a new level More

This forum has been closed.
Comments
     
There are no comments in this forum. Be first and add one

Featured Videos

Your JavaScript is turned off or you have an old version of Adobe's Flash Player. Get the latest Flash player.
Information War Rages Alongside Real One in Ukrainei
X
Al Pessin
July 31, 2014 8:13 PM
The downing of the Malaysian airliner two weeks ago, and allegations that Russians are shelling Ukrainian troops across the border, have moved the information war swirling around the Ukrainian conflict to a new level. VOA's Al Pessin reports from Kyiv.
Video

Video Information War Rages Alongside Real One in Ukraine

The downing of the Malaysian airliner two weeks ago, and allegations that Russians are shelling Ukrainian troops across the border, have moved the information war swirling around the Ukrainian conflict to a new level. VOA's Al Pessin reports from Kyiv.
Video

Video When Fighting Eases, Gazans Line Up at Bakeries

When there is a lull in the conflict in Gaza, residents who have been hunkered down in their apartments rush out to stock up on food and other necessities. Probably the most important destination is the local bakery. VOA’s Scott Bobb reports from Gaza City.
Video

Video US-Funded Program Offers Honduran Children Alternative to Illegal Immigration

President Obama and Central American leaders recently agreed to come up with a plan to address poverty and crime in the region that is fueling the surge of young migrants trying to illegally enter the United States. VOA’s Brian Padden looks at one such program in Honduras - funded in part by the United States - which gives street kids not only food and safety but a chance for a better life without, crossing the border.
Video

Video 'Fab Lab' Igniting Revolution in Kenya

The University of Nairobi’s Science and Technology Park is banking on 3-D prototyping to spark a manufacturing revolution in the country. Lenny Ruvaga has more for from Nairobi's so-called “FabLab” for VOA.
Video

Video Gazans in Shelled School Sought Shelter

Israel's air and ground assault against Hamas-led fighters in Gaza has forced many Palestinians to flee their homes, seeking safety. But safe places are hard to find, as VOA’s Scott Bobb reports from Jabaliya.
Video

Video Rapid Spread of Ebola in West Africa Prompts Global Alert

Across West Africa, health officials are struggling to keep up with what the World Health Organization describes as the worst ebola outbreak on record. The virus has killed hundreds of people this year. U.S. President Barack Obama and other world leaders are watching the developments closely as they weigh what actions, if any, are needed to help contain the disease.
Video

Video Michelle Obama: Young Africans Need to Embrace Women's Rights

U.S. first lady Michelle Obama urged some of Africa's best and brightest to advocate for women's rights in their home countries. As VOA's Pam Dockins explains, Obama spoke to some 500 participants of the Young African Leaders Initiative, a six-week U.S.-based training and development program.
Video

Video Immigrant Influx on Texas Border Heats Up Political Debate

Immigrants from Central America continue to cross the U.S.-Mexico border in south Texas, seeking asylum in the United States, as officials grapple with ways to deal with the problem and provide shelter for thousands of minors among the illegal border crossers. As VOA's Greg Flakus reports from Houston, the issue is complicated by internal U.S. politics and U.S. relations with the troubled nations that immigrants are fleeing.
Video

Video Study: Latino Students Most Segregated in California

Even though legal school segregation ended in the United States 60 years ago, one study finds segregation still occurs in the U.S. based on income and race. The University of California Los Angeles Civil Rights Project finds that students in California are more segregated by race than ever before, especially Latinos. Elizabeth Lee reports for VOA from Los Angeles.

AppleAndroid