Arctic and boreal plant species decline at their southern range limits in the Rocky Mountains.
Arctic and boreal plant species decline at their southern range limits in the Rocky Mountains.
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北极和北方植物物种在落基山脉南部范围内减少。
DOI：
10.1111/ele.12718
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发表时间：
2017
期刊：
影响因子：
8.8
通讯作者：
E. Crone
中科院分区：
文献类型：
--
作者：
P. Lesica;E. Crone
据预测，气候变化将导致暖边植物种群数量减少，但这一假设很少得到检验。了解哪些物种和栖息地最有可能受到影响对于适应性管理和保护至关重要。 1988年至2014年间，我们监测了美国蒙大拿州落基山脉南缘代表28种北极高山或北方植物的46个种群的密度，并分析了种群趋势以及与系统发育和栖息地的关系。过去二十年里边缘人口总体下降；然而，18 个双子叶植物种群的平均趋势为每年 -5.8%，但 28 个单子叶植物和蕨类植物种群的平均趋势仅为每年 -0.4%。苔原、沼泽和森林栖息地外围种群规模的下降没有显着差异。我们的研究结果支持了气候变化的预测影响，并表明脆弱性可能取决于系统发育或相关的解剖/生理属性。
Climate change is predicted to cause a decline in warm-margin plant populations, but this hypothesis has rarely been tested. Understanding which species and habitats are most likely to be affected is critical for adaptive management and conservation. We monitored the density of 46 populations representing 28 species of arctic-alpine or boreal plants at the southern margin of their ranges in the Rocky Mountains of Montana, USA, between 1988 and 2014 and analysed population trends and relationships to phylogeny and habitat. Marginal populations declined overall during the past two decades; however, the mean trend for 18 dicot populations was -5.8% per year, but only -0.4% per year for the 28 populations of monocots and pteridophytes. Declines in the size of peripheral populations did not differ significantly among tundra, fen and forest habitats. Results of our study support predicted effects of climate change and suggest that vulnerability may depend on phylogeny or associated anatomical/physiological attributes.