Morphological and Genetic Variation along a North-to-South Transect in Stipa purpurea, a Dominant Grass on the Qinghai-Tibetan Plateau: Implications for Response to Climate Change.
Morphological and Genetic Variation along a North-to-South Transect in Stipa purpurea, a Dominant Grass on the Qinghai-Tibetan Plateau: Implications for Response to Climate Change.
复制标题
DOI：
10.1371/journal.pone.0161972
复制
发表时间：
2016
期刊：
影响因子：
3.7
通讯作者：
Song Z
中科院分区：
文献类型：
--
作者：
Liu W;Zhao Y;You J;Qi D;Zhou Y;Chen J;Song Z
估计物种应对快速环境气候变化的潜力对于确定它们未来的生存能力和保护至关重要。现有种群之间沿气候梯度的变化可能预测一个物种将如何应对未来的气候变化。紫针茅是青藏高原高寒草原和草甸的优势种。对紫云英进行了生态位模拟，发现其分布与年降水量和最暖季度平均温度的相关性最强。我们在QTP上建立了一条2000多公里长的南北样带，反映了温度和降水的梯度，然后用11个微卫星标记估计了样带沿线20个居群之间的形态和遗传分化。紫云英种群的生殖性状(种子数和生殖枝数)、生殖营养生长比和根长随气候变量的变化显著。紫云英具有较高的遗传多样性(He=0.585)、较大的有效种群规模(Ne>；1,000)和较高水平的种群间基因流动。紫云英种群具有镶嵌遗传结构：一些距离较远的种群(相距1000公里以上)在遗传上聚在一起，而较近的种群(相距100公里)则明显分化，表明当地适应。不对称的种群间基因流动沿采样样带发生，可能是通过迁徙的食草动物，如藏羚羊(Pantholophodgsonii)的种子传播所介导的。这些发现表明，种群性能的变化和基因流动都有助于紫斑潜蝇对气候变化的反应。
Estimating the potential of species to cope with rapid environmental climatic modifications is of vital importance for determining their future viability and conservation. The variation between existing populations along a climatic gradient may predict how a species will respond to future climate change. Stipa purpurea is a dominant grass species in the alpine steppe and meadow of the Qinghai-Tibetan Plateau (QTP). Ecological niche modelling was applied to S. purpurea, and its distribution was found to be most strongly correlated with the annual precipitation and the mean temperature of the warmest quarter. We established a north-to-south transect over 2000 km long on the QTP reflecting the gradients of temperature and precipitation, and then we estimated the morphological by sampling fruited tussocks and genetic divergence by using 11 microsatellite markers between 20 populations along the transect. Reproductive traits (the number of seeds and reproductive shoots), the reproductive-vegetative growth ratio and the length of roots in the S. purpurea populations varied significantly with climate variables. S. purpurea has high genetic diversity (He = 0.585), a large effective population size (Ne >1,000), and a considerable level of gene flow between populations. The S. purpurea populations have a mosaic genetic structure: some distant populations (over 1000 km apart) clustered genetically, whereas closer populations (< 100 km apart) had diverged significantly, suggesting local adaptation. Asymmetrical long-distance inter-population gene flow occurs along the sampling transect and might be mediated by seed dispersal via migratory herbivores, such as the chiru (Pantholops hodgsonii). These findings suggest that population performance variation and gene flow both facilitate the response of S. purpurea to climate change.
登录
查看更多内容
影响因子：
8.8
作者：
Kremer A;Ronce O;Robledo-Arnuncio JJ;Guillaume F;Bohrer G;Nathan R;Bridle JR;Gomulkiewicz R;Klein EK;Ritland K;Kuparinen A;Gerber S;Schueler S
通讯作者：
Schueler S
影响因子：
5.5
作者：
Gonzalo-Turpin, Heloise;Hazard, Laurent
通讯作者：
Hazard, Laurent
影响因子：
56.9
作者：
Alsos, Inger Greve;Eidesen, Pernille Bronken;Brochmann, Christian
通讯作者：
Brochmann, Christian
影响因子：
4.2
作者：
Matter, Philippe;Kettle, Chris J.;Pluess, Andrea R.
通讯作者：
Pluess, Andrea R.
影响因子：
3.9
作者：
Hamasha, H. R.;Schmidt-Lebuhn, A. N.;Hensen, I.
通讯作者：
Hensen, I.