Coupled morphologic and demographic responses of Opeas striatissimum (Gastropoda: Subulinidae) to latest Pleistocene to early Holocene climate fluctuations
Coupled morphologic and demographic responses of Opeas striatissimum (Gastropoda: Subulinidae) to latest Pleistocene to early Holocene climate fluctuations
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DOI：
10.1016/j.palaeo.2020.110101
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发表时间：
2020-11
期刊：
影响因子：
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通讯作者：
Yajie Dong;N. Wu;Fengjiang Li;Houyuan Lu
中科院分区：
文献类型：
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作者：
Yajie Dong;N. Wu;Fengjiang Li;Houyuan Lu
在本文中，我们报告了中国黄土高原两个黄土剖面中更新世晚期至全新世腹足动物 Opeas striatissimum 的壳尺寸和年龄结构的变化，时间跨度过去 27ka。在~17-8ka期间，为了应对气候变暖，我们观察到贝壳尺寸显着增加，年龄结构（年龄组）更加多样化，成年个体数量增加~20%。壳的生长和从幼体到成体的存活率的提高反过来导致种群规模的增加，在8-3ka期间达到最大值，对应于全新世的气候最适期。我们还观察到，在新仙女木寒冷气候事件发生时，壳高度突然下降，并且相关的纹纹欧豌豆个体和成年个体总数显着减少。我们认为，所观察到的纹纹欧豌豆的形态和种群变化反映了生长季节的变化，与季风降雨和气候稳定性的变化有关，以响应从更新世晚期到全新世的气候波动。我们的研究提供了一个长期的视角，有助于完善无脊椎动物面对未来气候变化的机械种群模型。
In this paper, we report late Pleistocene to Holocene changes in the shell size and age structure of the gastropod,Opeas striatissimum, in two loess profiles in the Chinese Loess Plateau, spanning the past 27 ka. During the interval of ~17–8 ka, in response to climatic warming, we observed marked increases in shell dimensions and a more diverse age structure (age classes), as well as a ~20% increase in the number of adult individuals. Shell growth and enhanced survival from juvenile to adult, in turn, resulted in an increase in the population size, which reached a maximum during the interval ~8–3 ka, corresponding to the Holocene Climatic Optimum. We also observed an abrupt decrease in shell height and related significant decreases in the total number of individuals ofOpeas striatissimumand adult individuals at the time of the Younger Dryas cold climatic event. We suggest that the observed morphologic and demographic changes observed forOpeas striatissimumreflect changes in the growing season, linked to changes in monsoon rainfall and climate stability, in response to climate fluctuations from the late Pleistocene to the Holocene. Our study provides a long-term perspective that helps refine mechanistic population models of invertebrates in the face of future climate change.