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首页> 美国卫生研究院文献>Scientific Reports >Drying soil in North China drove the outbreak range expansion of meadow moth by facilitating long-distance migration
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Drying soil in North China drove the outbreak range expansion of meadow moth by facilitating long-distance migration

机译：华北地区的旱作土壤通过促进长距离迁移驱使草甸蛾的爆发范围扩大

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摘要

Studies of the mechanism underlying the range expansion of organisms have mainly focused on environmental conditions at the edges of species’ distributions, potentially ignoring other possible factors. Here, we demonstrated the outbreak range expansion of meadow moth from North China to Northeast China in the past three outbreak periods. We found that the negligible infestation in Northeast China in the 1950s could not be explained by local climatic conditions. However, the soil moisture in North China decreased distinctly from 1951 to 2011 and was significantly and positively correlated with the timing of the first adult peak on plateaus, meaning that the deterioration of habitat conditions could result in earlier peaks of adults in areas of high-elevation by stimulating the short-distance dispersal of adults from the plains to the plateaus. Adults peaking earlier have a stronger tendency to emigrate due to mismatched phenology. Hence, drying soil in North China caused the frequent long-distance migration of meadow moth after the 1970s and drove the outbreak range expansion. This study suggests that, for a migratory species, the deterioration of habitat conditions in overwintering areas might also influence the distribution of this species in breeding areas at high latitudes by facilitating migration activities.
机译：对生物范围扩展的潜在机制的研究主要集中在物种分布边缘的环境条件，而可能忽略了其他可能的因素。在这里，我们展示了过去三个暴发期间华北到东北的草地蛾的暴发范围扩大。我们发现，1950年代中国东北的侵扰微不足道，不能用当地的气候条件来解释。然而，从1951年到2011年，华北地区的土壤水分明显减少，并且与高原上第一个成年高峰的时间显着正相关，这意味着栖息地条件的恶化可能导致高海拔地区成年高峰的出现。通过刺激成年人从平原到高原的短距离扩散来提高海拔。由于物候不匹配，成年高峰的成年人更容易迁移。因此，华北地区的土壤干燥导致1970年代后草甸蛾频繁的长距离迁移，并促使暴发范围扩大。这项研究表明，对于迁徙物种而言，越冬地区栖息地条件的恶化也可能通过促进迁徙活动而影响该物种在高纬度繁殖地区的分布。

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