GR: Roads are an element of widespread human construction that destroys habitat and causes wildlife decline. As reported here, roads have other serious ecosystem impacts. They cause selective deaths of the regulators of food chains, the top carnivores.
While the Iberian lynx is IUCN-classified as “endangered”, other species threatened by roads are not. For example, two species in Japan: According to the projection, the Japanese badger (Meles anakuma) and the Japanese marten (Martes melampus) will have died out in nine and 17 years, respectively, because of the threat from roads.
“The threat of roads to carnivore species around the world has been seriously underestimated, according to a new study that looked at the issue on a global scale.
“After looking at 232 carnivore species around the world (out of a total of about. 270 existing species) and assessing how severely these are affected by roads cut through their habitat, the researchers concluded that some rare species are even at risk in areas with low road densities. The study, published in the journal Global Ecology and Biogeography, calculated natural mortality rates, reproduction and carnivore movement patterns, determining the maximum density of roads that a species can cope with.
“The study also tried to pinpoint the minimum area of unbroken habitat that a species needs to maintain an enduring healthy population. Finally, they compared these numbers with road network data.
“Among the 5 percent of carnivores (17 species) that are most affected by roads, nine are currently categorized as species of “least concern” by the International Union for Conservation of Nature, which means that they are regarded as not endangered.
“Our results show the necessity of updating the protection status of these species, whose threat from roads has previously been underestimated,” said Henrique Pereira, with the German Centre for Integrative Biodiversity Research, the Martin Luther University Halle-Wittenberg and the Portugal Infrastructures Biodiversity Chair/Research Center in Biodiversity and Genetic Resources (CIBIO-InBIO). –Summit County Citizens Voice (More: Study says road threat to carnivores is underestimated globally – Summit County Citizens Voice.)