Reindeer movement patterns in alpine summer ranges
Reindeer movement patterns in alpine summer ranges
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高山夏季范围内的驯鹿运动模式
DOI：
10.1007/s00300-010-0815-y
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发表时间：
2010
期刊：
影响因子：
1.7
通讯作者：
J. Moen
中科院分区：
文献类型：
--
作者：
A. Skarin;Ö. Danell;R. Bergström;J. Moen
为了评估半驯化驯鹿 (Rangifer tarandus tarandus) 在裸地季节的移动速率，我们使用了 48 头雌性驯鹿的连续 GPS 位置。数据于 2002 年和 2003 年夏季在瑞典山区的两个萨米驯鹿牧区 Handölsdalen 和 Sirges 收集。分析了五个不同时间段的运动速率：整个季节、春季、初夏、仲夏和初秋的分季节。分析了与植被类型、海拔、地形崎岖程度、温度、风速和距离远足路径的距离有关的运动变化。我们假设觅食质量和不同的天气条件是决定移动率的重要因素。我们发现研究区域之间的驯鹿移动率相似，并且取决于植被类型和天气条件。通过研究昼夜节律运动，在仲夏季节，预计白天雌鹿的活动会很高，驯鹿会停留在食物质量较低的高海拔地区，但在夜间转移到食物质量较高的低海拔地区。因此，我们建议雌鹿活动迫使驯鹿留在低质量的植被类型中。驯鹿的活动与人类活动中间区域的干扰有关。我们发现，在Handölsdalen，徒步旅行者数量较多，驯鹿的移动率在靠近步道的地方下降，而在Sirges，徒步旅行者较少，驯鹿的移动率在靠近步道的地方增加。
To evaluate the movement rates of semi-domesticated reindeer (Rangifer tarandus tarandus) during the bare-ground season, we used successive GPS positions from 48 female reindeer. Data were collected during the summers of 2002 and 2003 in two Sámi reindeer herding districts in the Swedish mountains, Handölsdalen, and Sirges. The movement rates were analysed at five different time periods: over the whole season, and over the sub-seasons spring, and early summer, mid summer and early autumn. Variation in movements were analysed in relation to vegetation type, altitude, terrain ruggedness, temperature, wind speed, and proximity to hiking trails. We hypothesised that the foraging quality and different weather conditions is an important factor in determining movement rates. We found that reindeer movement rates were similar between study areas and were dependent on vegetation type and on weather conditions. Studying the circadian movements, in mid summer period when daytime oestrid activity are expected to be high, the reindeer stayed at higher altitudes where food quality was low, but moved to low altitudes at night where the food quality was higher. Therefore, we suggest that oestrid activity forces the reindeer to stay in low-quality vegetation types. Reindeer movements were linked to disturbance in areas of intermediate human activity. We found that in Handölsdalen, where hikers are abundant, the movement rates of reindeer decreased closer to the trails whereas in Sirges, where hikers are less abundant, the movement rates of reindeer increased closer to the trails.