Genetic and ecological insights into glacial refugia of walnut (Juglans regia L.).
Genetic and ecological insights into glacial refugia of walnut (Juglans regia L.).
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DOI：
10.1371/journal.pone.0185974
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发表时间：
2017
期刊：
影响因子：
3.7
通讯作者：
Preece JE
中科院分区：
文献类型：
--
作者：
Aradhya M;Velasco D;Ibrahimov Z;Toktoraliev B;Maghradze D;Musayev M;Bobokashvili Z;Preece JE
末次盛冰期（LGM）期间树木的分布和存活一直是古生态学家、古地理学家和遗传学家感兴趣的问题。生态位模型将物种的出现和丰度与气候变量联系起来，被广泛用于获得生态和进化的见解，并预测物种在空间和时间上的分布。本研究涉及核桃的冰川历史，以解决过去的分布，通过遗传分析和生态建模的本，LGM和末次间冰期（LIG）时期的问题。最大熵方法被用来预测当前的核桃分布模型的LGM（21-18 kyr BP）和LIG（130-116 kyr BP）的气候条件。模型调整确定了核桃数据集过滤在10公里的空间分辨率为最好的建模当前的分布和后推过去（LGM和LIG）的核桃分布。目前的分布模式预测南高加索，部分西亚和中亚延伸到南亚，包括北方阿富汗，巴基斯坦，西北喜马拉雅地区，西藏西南部，作为有利的气候生态位匹配的现代分布核桃。对核桃分布的后推表明，核桃在末次盛冰期的分布范围仅限于南高加索、中亚和南亚地区，并延伸至西藏西南部、印度东北部、喜马拉雅地区的锡金和不丹以及中国东南部。CCSM和MIROC的预测都有重叠，只是MIROC预测在末次盛冰期期间巴尔干半岛的半岛会出现大量核桃。相比之下，对当前核桃分布的遗传分析表明，巴基斯坦北方和阿富汗周边地区、印度西北部和塔吉克斯坦南部的一个狭窄地区可能是核桃在冰川作用下幸存下来的多样性热点。总的来说，研究结果表明，核桃可能在北纬30°至45°之间的广泛地理区域的几个避难所中幸存下来。然而，人类可能在核桃的近代历史和现代分布中发挥了重要作用。
The distribution and survival of trees during the last glacial maximum (LGM) has been of interest to paleoecologists, biogeographers, and geneticists. Ecological niche models that associate species occurrence and abundance with climatic variables are widely used to gain ecological and evolutionary insights and to predict species distributions over space and time. The present study deals with the glacial history of walnut to address questions related to past distributions through genetic analysis and ecological modeling of the present, LGM and Last Interglacial (LIG) periods. A maximum entropy method was used to project the current walnut distribution model on to the LGM (21–18 kyr BP) and LIG (130–116 kyr BP) climatic conditions. Model tuning identified the walnut data set filtered at 10 km spatial resolution as the best for modeling the current distribution and to hindcast past (LGM and LIG) distributions of walnut. The current distribution model predicted southern Caucasus, parts of West and Central Asia extending into South Asia encompassing northern Afghanistan, Pakistan, northwestern Himalayan region, and southwestern Tibet, as the favorable climatic niche matching the modern distribution of walnut. The hindcast of distributions suggested the occurrence of walnut during LGM was somewhat limited to southern latitudes from southern Caucasus, Central and South Asian regions extending into southwestern Tibet, northeastern India, Himalayan region of Sikkim and Bhutan, and southeastern China. Both CCSM and MIROC projections overlapped, except that MIROC projected a significant presence of walnut in the Balkan Peninsula during the LGM. In contrast, genetic analysis of the current walnut distribution suggested a much narrower area in northern Pakistan and the surrounding areas of Afghanistan, northwestern India, and southern Tajikistan as a plausible hotspot of diversity where walnut may have survived glaciations. Overall, the findings suggest that walnut perhaps survived the last glaciations in several refugia across a wide geographic area between 30° and 45° North latitude. However, humans probably played a significant role in the recent history and modern distribution of walnut.
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影响因子：
2.4
作者：
Aradhya, Mallikarjuna K.;Potter, Daniel;Simon, Charles J.
通讯作者：
Simon, Charles J.
影响因子：
4
作者：
Beer, Ruth;Kaiser, Franziska;Tinner, Willy
通讯作者：
Tinner, Willy
DOI：
10.1111/j.1438-8677.1980.tb01240.x
发表时间：
1980-01-01
期刊：
ACTA BOTANICA NEERLANDICA
影响因子：
--
作者：
BOTTEMA, S
通讯作者：
BOTTEMA, S
影响因子：
1.9
作者：
BOTTEMA, S
通讯作者：
BOTTEMA, S
影响因子：
3.1
作者：
Boria, Robert A.;Olson, Link E.;Anderson, Robert P.
通讯作者：
Anderson, Robert P.