Build a bear animal crossing
Sloth sanctuary: a refuge for sloths in costa rica
As a result of the global climate emergency, several species have been displaced from their natural habitats. Perhaps some of the most affected are the polar bears that, with the loss of glaciers in the north, have had to move to other, more southerly latitudes. With this, a new hybrid between them and grizzly bears was recently detected.
This new interaction has generated a new species of hybrid bears. As the two species mate, their offspring expand. According to the scientists who have observed them, the characteristics of both bears may give them an advantage over other species: they may be more resistant to temperature changes in the environment.
According to Larisa DeSantis, a paleontologist and associate professor of biological sciences at Vanderbilt, University of Tennessee, grizzly/polar grolars, the colloquial name for the new species, are here to stay:
«Generally, hybrids are no better adapted to their environments than their parents, but there is a possibility that these hybrids may seek out a wider range of food sources,» the expert said.
The bridge – animated story about the importance and usefulness of habitat fragmentation.
Habitat fragmentation occurs when human-constructed barriers – such as roads, railroads, canals, power lines, and pipelines – penetrate and divide wildlife habitat (Primack 2006). Among these barriers, roads have the most widespread and detrimental impacts (Spellerberg 1998). Scientists estimate that the U.S. highway system impacts the ecosystems of at least one-fifth of the country’s land area (Forman, 2000).
Banff National Park offers one of the best opportunities to study the effectiveness of wildlife corridors because it contains a wide variety of species and is separated in two by a large commercial highway called the Trans-Canada Highway (TCH). To reduce the effects of the four-lane TCH, 24 wildlife crossings (22 underpasses and two overpasses) were constructed to ensure habitat connectivity and protect motorists (Clevenger 2007). In 1996, Parks Canada (that country’s national parks agency) developed a contract with university researchers to evaluate the effectiveness of the crossings. The first decade of the 21st century produced several publications analyzing the impacts of wildlife crossings on various species as well as on overall wildlife mortality. (Clevenger and Waltho, 2000, Clevenger et al., 2001, and Clevenger 2007).
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The meeting took place this Friday in the Casa de Cultura of the Town Hall of Cangas del Narcea and was attended by about 30 neighbors of the area. In it, the Administration made recommendations to increase the safety of people and to avoid the habituation of bears.
Although it was not the subject of the colloquium, the experts recognize that they are also concerned about another cause of bear habituation: tourist observation points too close to the animals. In one of them, at the edge of a road, a female with a cub was observed in broad daylight and with a large human presence. «That calf is growing up with the idea that it should not be afraid of humans,» explains the biologist. «We believe that this female preferred human presence to the risk of losing the calf to an attack by an adult male, who would never tolerate such human proximity.»
The Asturian Administration reminds that the species is still in danger of extinction, although the numbers are increasing (no less than 300 specimens in the Cantabrian mountain range) and the coordinator of the brown bear strategy in the community, Víctor Vázquez, said graphically before the neighbors that «the loss of any specimen due to unnatural causes is unacceptable». A message full of content at a time when complaints about the economic losses generated by the animal are increasing, and the causes of the death of the bear that appeared in January in the same area where another specimen was found shot dead in September, both in the vicinity of Muniellos, are still being analyzed.
Real hybrid animals! | aula365’s 5 ☺️
In 2016, the International Union for Conservation of Nature had already changed the species’ status from endangered to vulnerable, thanks to stable growth and habitat expansion. But some Chinese scientists and managers rejected this assessment, arguing that it was premature and could hinder panda protection efforts.
«We have seen how takin activity directly influences the growth of flora,» says Diao Kunpeng, founder of the Sichuan NGO Qingye Ecology, which does research and supports nature reserves.
Photo by Kyle ObermannPandas mark trees with a slimy substance that comes out of glands under their tails as a mechanism to communicate and find mates. But when takins rub against trees to relieve their itch, they remove or diminish the scent marks.
Scientists don’t yet have conclusive data on how these changes in the forest will affect wild pandas, but a long-term study at Tangjiahe should provide more answers, Diao says.