Barriers are going up rapidly as border projects and livestock farming increase, but they impede wildlife migrations and genetically isolate threatened species.
looked at all the studies of the effects of fences and found that their profound impacts are often ignored or greatly underestimated.Recent research shows that these impacts extend far beyond blocking animal migration routes and include furthering disease transmission by concentrating animals, altering the hunting practices of predators, and impeding access to key areas of water and forage.
“Things are right at the beginning stages of how we are going to map fences … Taking fences into account creates a better understanding of the cumulative effects of development on the landscape. Fence ecology affects not only wildlife, but ecosystem processes, and it has a wonderful intersection with people and communities. There is a lot more to learn about the impacts of fencing.”
Indirect threats include the blocking of migration routes, the elimination of habitat, and changes in hunting by predators. Fences, for instance, are sometimes used by wolves to corral their prey. And a rapid expansion of the number of fences in wildlife-rich East Africa has blocked the great migration of wildebeests in the Greater Mara region of Kenya, where the animals need to follow the rains to find food and water. Some are dying for lack of water.
On the border of China and Mongolia, a Mongolian gazelle was tracked for 20 days along a fence as it covered 30 miles trying to find a place to cross. Better understanding the role that fences play in ecosystems can often lead to simple fixes, such as figuring out which ones can be removed or modified and then doing things like raising the height of the bottom strand to allow animals to pass under or lowering the top wire to allow them to jump over.
Fences aren’t always a problem—in the right place they can be an essential tool for conservation. New fencing, for example, has become an important tool in managing predators—especially grizzly bears near more populated areas. Stout electrical fences are essential for fencing off chicken coops, beehives, and other grizzly bear attractants.
日本 最新ニュース, 日本 見出し
Similar News:他のニュース ソースから収集した、これに似たニュース記事を読むこともできます。
Four Russian employees charged in U.S. in hacking schemes that targeted global infrastructureFederal prosecutors unseal indictments that charge four Russian government employees in two hacking conspiracies that targeted thousands of computers in the global energy sector between 2012 and 2018.
続きを読む »
Manhattan D.A.: 6 facing charges in takedown of global bitcoin money laundering operationThe Manhattan District Attorney says a global operation was using cryptocurrency to launder money for several crimes. Thursday afternoon, several defendants were arraigned on numerous charges. AndreaGrymesTV reports.
続きを読む »
We are running out of sand and global demand could soar 45% by 2060Sand is a key component for concrete and glass but the world is running out, and the growth of cities over the next 40 years could lead to a huge jump in demand.
続きを読む »
Biden warns of global food shortages as Russia-Ukraine war upends wheat suppliesRussia and Ukraine jointly supply about a fourth of the world’s wheat exports.
続きを読む »
4 Russian government operatives indicted for allegedly hacking global energy facilities between 2012 and 2018The United States has indicted four Russian men, including three Russian intelligence officers, for alleged hacking campaigns that targeted hundreds of energy companies around the world from 2012 to 2018, the US Justice Department said Thursday.
続きを読む »
U.S. Charges Russian Government Hackers With Campaign of Global Energy Sector CyberattacksThe Justice Department unsealed indictments against four Russians for alleged involvement in cyberattacks on energy-critical infrastructure between 2012 and 2018.
続きを読む »