甘尼克斯🐯 wrs_789_aaa
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东北虎VS狼---不友好的邻居 TIGERS AND WOLVES in Russia have an uncomplicated relationship: they simply don’t get along. This was not always understood, as the first study to examine both populations in the southern Russian Far East found equilibrium, with the predators seeming to occupy the same forests without killing each other off. In retrospect, however, it became clear that this single snapshot of their relationship did not reveal the full story. At the time of that analysis, Amur tigers were rebounding from a historical population low. As tigers reoccupied forests long abandoned they then displaced the wolves, either by killing them or driving them out. Researchers have recently been able to observe this dynamic firsthand in two different parts of tiger range. First, in the Pri-Amur region, where Amur tigers have been absent for half a century. Here, tigers are now being released to recolonize former habitat, and one of these tigers killed and ate two wolves during her first winter in the wild. If tigers are successful at regaining a foothold in the Pri-Amur, wolves might disappear from the region. Second, in the Sikhote-Alin Biosphere Reserve to the south, where a resident female tiger died amidst an outbreak of canine distemper virus in 2010 and was replaced by a pair of wolves soon thereafter. Things did not end well for these canids, however. One succumbed to canine distemper itself, and another was last seen running across a road a few years later. Being chased by a tiger. 俄罗斯的老虎和狼间有着简单的关系:他们根本就不相处。 这并不总是被理解,因为第一次研究这两个物种在俄罗斯南部的远东地区间的平衡时,这两种食肉动物看上去占据着相同的森林,但不杀死对方。 然而,回顾一下,很显然,这种简单的研究并未能阐清完整的故事。该分析的时间段,是东北虎种群数量处于历史最低点时期的。而当虎从旷日无虎的森林中重新壮大时,就会替代狼的地位,把它们吃掉或者赶走。 研究人员最近已经观察到了两个不同地区范围老虎的动态一手情况。 首先,在已经半个世纪没出现过东北虎的首选阿穆尔地区,老虎现在被释放到了之前的栖息地,其中的一只雌虎在它野外的第一个冬天杀死并吃掉了两只狼。如果老虎在此成功立足,那么狼可能会从该地区消失。 其次,在锡霍特阿林生态保护区南部,2010年一只定居于此的雌虎死于犬瘟热病毒发作,取而代之的是一对狼占领了该区域。然而这些犬科动物并未善终,一个死于自己犬科的犬瘟热,另一只几年后被观测到被一只老虎追着穿过一条路。
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