Yang Jingjun, Wu Anchi, Li Jinhua, Wei Haihang, Qin Jie, Tian Hongdeng, Fan Donghan, Wu Weidai, Chen Shan, Tong Xin, Liu Xiu
Guangxi Forestry Research Institute Nanning China.
Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystem, South China Botanical Garden, Chinese Academy of Sciences Guangzhou China.
Ecol Evol. 2024 Jan 9;14(1):e10835. doi: 10.1002/ece3.10835. eCollection 2024 Jan.
Increasing studies have shown the importance of intraspecific trait variation (ITV) on ecological processes. However, the patterns and sources of ITV are still unclear, especially in the propagules of coastal vegetation. Here, we measured six hypocotyl traits for 66 genealogies of from 26 sites and analyzed how ITV in these traits was distributed across geography and genealogy through variance partitioning. We further constructed mixed models and structural equation models to disentangle the effects of climatic, oceanic, and maternal factors on ITV. Results showed that size-related traits decreased along increasing latitudinal gradients, which was mainly driven by positive regulation of temperature on these traits. By contrast, ITV of shape trait was unstructured along latitudinal gradients and did not show any dependence among environmental variables. These findings indicate that propagule size mainly varied between populations, whereas propagule shape mainly varied between individuals. Our study may provide useful insights into the ITV in propagule from different functional dimensions and on a broad scale, which may facilitate mangrove protection in light of ITV.
越来越多的研究表明种内性状变异（ITV）对生态过程的重要性。然而，ITV的模式和来源仍不清楚，特别是在沿海植被的繁殖体中。在这里，我们测量了来自26个地点的66个谱系的六个胚轴性状，并通过方差分解分析了这些性状的ITV如何在地理和谱系中分布。我们进一步构建了混合模型和结构方程模型，以剖析气候、海洋和母体因素对ITV的影响。结果表明，与大小相关的性状随着纬度梯度的增加而降低，这主要是由温度对这些性状的正向调节驱动的。相比之下，形状性状的ITV在纬度梯度上没有结构，并且在环境变量之间没有表现出任何依赖性。这些发现表明，繁殖体大小主要在种群之间变化，而繁殖体形状主要在个体之间变化。我们的研究可能为从不同功能维度和广泛尺度上了解繁殖体中的ITV提供有用的见解，这可能有助于根据ITV进行红树林保护。
