深色代表的适宜驯鹿生存的区域面积将急剧萎缩（图片来源：参考文献10）
2万年前的末次盛冰期，冰川吞没了当时适宜驯鹿的栖息地，同时塑造了驯鹿的基因，这也许会使驯鹿无法适应未来的气候变化。根据研究人员建立的模型，随着温室效应的加剧，到2080年北美驯鹿可能会失去89%的适宜栖息地。研究者称他对驯鹿物种的未来感到悲观。
而我们也应该行动起来，自觉爱护野生动物，不能让驯鹿从我们眼中消失，成为圣诞夜的遥远传说。
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