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Is there local adaptation in plant species to soil reaction? A lesson from a multispecies experiment
Restoration Ecology ( IF 3.2 ) Pub Date : 2021-03-24 , DOI: 10.1111/rec.13393
Denise Rupprecht 1 , Norbert Hölzel 1 , Anna Bucharova 1
Affiliation  

Seed sourcing for restoration measures is a currently highly debated issue in conservation ecology. Where to take the seeds from, if reintroduction of plant species is necessary? In many countries, seed transfer zones have been defined to preserve genetic variability and to provide locally adapted plants. However, delineation of seed transfer zones mostly relies on climatic gradients, ignoring other abiotic factors, such as bedrock and soil conditions. One of the main soil properties is soil reaction (pH), yet it is still unclear whether pH is an important driver for local adaptation in plants. In this study, we tested whether plants are adapted to soil reaction across five common grassland species. For each species, we sampled seeds from two provenances, and within each provenance from two populations—one coming from basic and one from acidic soil. We grew the plants in a common garden in an artificial substrate with manipulated pH, which allowed us to test for the effect of soil reaction, isolated from other soil properties. All species produced more biomass on acidic substrate, in most cases independently of their original soil and provenance. Only one out of five species showed weak local adaptation to soil reaction. The experimental substrate by far explained most of the biomass production in all species. This suggests that adaptation to soil reaction is rare and of low importance in common species of temperate grasslands.

中文翻译:

植物物种是否对土壤反应有局部适应性?多物种实验的教训

用于恢复措施的种子采购是保护生态学中目前备受争议的问题。如果需要重新引入植物物种,从哪里获取种子?在许多国家,已确定种子转移区以保持遗传变异性并提供适应当地情况的植物。然而,种子转移区的划分主要依赖于气候梯度,而忽略了其他非生物因素,如基岩和土壤条件。土壤的主要特性之一是土壤反应 (pH),但目前尚不清楚 pH 值是否是植物局部适应的重要驱动因素。在这项研究中,我们测试了植物是否适应了五种常见草原物种的土壤反应。对于每个物种,我们从两个来源采样种子,并且在每个来源中来自两个种群——一个来自碱性土壤,一个来自酸性土壤。我们在一个公共花园中种植植物,在人工基质中调节 pH 值,这使我们能够测试与其他土壤特性分离的土壤反应的影响。所有物种在酸性基质上产生更多的生物量,在大多数情况下,与其原始土壤和来源无关。只有五分之一的物种对土壤反应表现出较弱的局部适应性。迄今为止,实验底物解释了所有物种的大部分生物质生产。这表明对土壤反应的适应在温带草原的常见物种中很少见且重要性不高。与其他土壤特性隔离。所有物种在酸性基质上产生更多的生物量,在大多数情况下,与其原始土壤和来源无关。只有五分之一的物种对土壤反应表现出较弱的局部适应性。迄今为止,实验底物解释了所有物种的大部分生物质生产。这表明对土壤反应的适应在温带草原的常见物种中很少见且重要性不高。与其他土壤特性隔离。所有物种在酸性基质上产生更多的生物量,在大多数情况下,与其原始土壤和来源无关。只有五分之一的物种对土壤反应表现出较弱的局部适应性。迄今为止,实验底物解释了所有物种的大部分生物质生产。这表明对土壤反应的适应在温带草原的常见物种中很少见且重要性不高。
更新日期:2021-03-24
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