Population trend and distribution of mountain (Lepus timidus) and brown hares (Lepus europaeus) in Central Alps (N-Italy, 1980–2020)

IF 1.8 3区 生物学 Q3 ECOLOGY
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Abstract

Mountainous regions are very vulnerable to climate changes, as they experience higher temperature increases than the surrounding environments. A general movement of species toward higher altitudes, in search of suitable sites, is being observed. In the case of the Italian Alps, an expansion of the brown hare (Lepus europaeus) is possible within the zones occupied by the mountain hare (Lepus timidus), which frequents higher altitudes. The risk is an increase in the hybridization and a contraction of the mountain hare’s range. In this study, we analyzed the hunting bags (weighted by the number of active hunters each year) of brown and mountain hares from the period of 1980–2020, in the province of Sondrio (Central Alps) in northern Lombardy (N-Italy), with the aim of (i) highlighting any population trends in relation to climate change, (ii) identifying altitudinal changes in the distribution of the two species over the years, (iii) identifying the environmental variables that influence the distribution of the two species, and (iv) creating suitability maps in the study area. To study population trends, the hunting bag data were corrected by dividing the number of hare shot by the number of active hunters in that year. For both species, no population trends were found between 1980 and 2020. Weather variables do not seem to have influenced population trends. No significant trends in the altitudinal distribution of the two species were observed over the period investigated. The results indicate that the two species select different altitudes, with the exception of the belt between 1600 and 1800 m a.s.l. Both species select meadows.

中阿尔卑斯山(意大利北部)山兔(Lepus timidus)和褐兔(Lepus europaeus)的种群趋势和分布,1980-2020 年
摘要 山区非常容易受到气候变化的影响,因为与周围环境相比,山区的气温升幅更大。为了寻找合适的地点,物种普遍向高海拔地区迁移。在意大利阿尔卑斯山,褐兔(Lepus europaeus)有可能在山兔(Lepus timidus)占据的区域内扩张,而山兔经常在更高的海拔地区活动。其风险在于杂交的增加和山兔活动范围的缩小。在这项研究中,我们分析了 1980-2020 年期间伦巴第(意大利北部)松德里奥省(中央阿尔卑斯山)棕兔和山兔的狩猎袋(按每年活跃猎人数量加权),目的是:(i) 突出与气候变化有关的任何种群趋势;(ii) 确定这两个物种多年来分布的海拔变化;(iii) 确定影响这两个物种分布的环境变量;(iv) 绘制研究区域的适宜性地图。为研究种群趋势,通过将猎杀野兔的数量除以当年的活跃猎人数量,对狩猎袋数据进行了校正。对于这两个物种,1980 年至 2020 年间没有发现任何种群趋势。天气变量似乎并未影响种群趋势。在调查期间,没有观察到这两个物种在海拔分布上的明显趋势。结果表明,除了海拔 1600 至 1800 米之间的地带外,这两个物种选择了不同的海拔高度。
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来源期刊
CiteScore
3.40
自引率
5.00%
发文量
68
审稿时长
2 months
期刊介绍: European Journal of Wildlife Research focuses on all aspects of wildlife biology. Main areas are: applied wildlife ecology; diseases affecting wildlife population dynamics, conservation, economy or public health; ecotoxicology; management for conservation, hunting or pest control; population genetics; and the sustainable use of wildlife as a natural resource. Contributions to socio-cultural aspects of human-wildlife relationships and to the history and sociology of hunting will also be considered.
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