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Long-term genetic consequences of mammal reintroductions into an Australian conservation reserve
Biological Conservation ( IF 5.9 ) Pub Date : 2018-03-01 , DOI: 10.1016/j.biocon.2017.12.038
Lauren C. White , Katherine E. Moseby , Vicki A. Thomson , Stephen C. Donnellan , Jeremy J. Austin

Abstract Reintroduction programs aim to restore self-sustaining populations of threatened species to their historic range. However, demographic restoration may not reflect genetic restoration, which is necessary for the long-term persistence of populations. Four threatened Australian mammals, the greater stick-nest rat ( Leporillus conditor ), greater bilby ( Macrotis lagotis ), burrowing bettong ( Bettongia lesueur ) and western barred bandicoot ( Perameles bougainville ), were reintroduced at Arid Recovery Reserve in northern South Australia over the last 18 years. These reintroductions have been deemed successful based on population growth and persistence, however the genetic consequences of the reintroductions are not known. We generated large single nucleotide polymorphism (SNP) datasets for each species currently at Arid Recovery and compared them to samples collected from founders. We found that average genetic diversity in all populations at the Arid Recovery Reserve are close to, or exceeding, the levels measured in the founders. Increased genetic diversity in two species was achieved by admixing slightly diverged and inbred source populations. Our results suggest that genetic diversity in translocated populations can be improved or maintained over relatively long time frames, even in small conservation reserves, and highlight the power of admixture as a tool for conservation management.

中文翻译:

哺乳动物重新引入澳大利亚保护区的长期遗传后果

摘要 重新引入计划旨在将受威胁物种的自我维持种群恢复到其历史范围。然而,人口恢复可能并不反映基因恢复,这是种群长期存在所必需的。四种受威胁的澳大利亚哺乳动物,即大棒巢鼠 (Leporillus conditor)、大耳袋狸 (Macrotis lagotis)、穴居贝通 (Bettongia lesueur) 和西部条纹袋狸 (Perameles bougainville),被重新引入南澳大利亚北部干旱恢复保护区过去 18 年。根据人口增长和持久性,这些重新引入被认为是成功的,但是重新引入的遗传后果尚不清楚。我们为目前处于干旱恢复阶段的每个物种生成了大型单核苷酸多态性 (SNP) 数据集,并将它们与从创始人收集的样本进行了比较。我们发现干旱恢复保护区所有种群的平均遗传多样性接近或超过创始人测量的水平。通过混合略微发散的和近交源种群来增加两个物种的遗传多样性。我们的结果表明,易地种群的遗传多样性可以在相对较长的时间范围内得到改善或保持,即使是在小型保护区内,并突出了混合物作为保护管理工具的力量。在创始人中衡量的水平。通过混合略微发散的和近交源种群来增加两个物种的遗传多样性。我们的结果表明,易地种群的遗传多样性可以在相对较长的时间范围内得到改善或保持,即使是在小型保护区内,并突出了混合物作为保护管理工具的力量。在创始人中衡量的水平。通过混合略微发散的和近交源种群来增加两个物种的遗传多样性。我们的结果表明,易地种群的遗传多样性可以在相对较长的时间范围内得到改善或保持,即使是在小型保护区内,并突出了混合物作为保护管理工具的力量。
更新日期:2018-03-01
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