The role of plant-soil feedbacks and land-use legacies in restoration of a temperate steppe in northern China
The role of plant-soil feedbacks and land-use legacies in restoration of a temperate steppe in northern China
复制标题
植物-土壤反馈和土地利用遗产在中国北方温带草原恢复中的作用
DOI：
10.1007/s11284-010-0735-x
复制
发表时间：
2010-11-01
影响因子：
2
通讯作者：
Kardol, Paul
中科院分区：
文献类型：
--
作者：
Jiang, Lili;Han, Xingguo;Kardol, Paul
植物-土壤反馈影响植物生长和植物群落动态，然而，很少有人知道他们在生态恢复中的作用。本文以中国北方典型草原为研究对象，研究了农业干扰后草原植被恢复过程中的植物-土壤反馈作用。首先，我们分析了旧田恢复地和“目标”草原地单优势植物斑块下的非生物和生物土壤特性。其次，我们测试了植物土壤反馈生长的植物物种从这两个网站上的土壤从CON和异种起源。土壤性质一般没有显着差异之间的旧场网站和草原网站，但有显着差异的网站内的单优势植物斑块。虽然土壤物种起源（即，在反馈实验中，物种水平的植物-土壤反馈是“中性”的。土壤立地来源（荒地、草原）对荒地和草原物种生物量有显著影响。例如，老田物种在老田土壤中的生物量高于草原土壤，表明土地利用的积极遗产。然而，土壤站点的起源影响取决于植物物种下的土壤被收集。在解释植物生物量的非生物和生物土壤特性的预测值之间和组内的老领域和草原物种。我们的结论是，发生积极的土地利用遗产的老领域的物种可能会延迟演替取代老领域的草原物种。然而，高水平的特异性反应的老领域和草原植物物种的共和异质性土壤表明种间变异的程度，土壤遗产和植物-土壤反馈控制演替物种更替在中国草原生态系统。
Plant-soil feedbacks affect plant performance and plant community dynamics; however, little is known about their role in ecological restoration. Here, we studied plant-soil feedbacks in restoration of steppe vegetation after agricultural disturbance in northern China. First, we analyzed abiotic and biotic soil properties under mono-dominant plant patches in an old-field restoration site and in a 'target' steppe site. Second, we tested plant-soil feedbacks by growing plant species from these two sites on soils from con- and heterospecific origin. Soil properties generally did not differ between the old-field site and steppe site, but there were significant differences among mono-dominant plant patches within the sites. While soil species origin (i.e., the plant species beneath which the soil was collected) affected biomass of individual plant species in the feedback experiment, species-level plant-soil feedbacks were 'neutral'. Soil site origin (old-field, steppe) significantly affected biomass of old-field and steppe species. For example, old-field species had higher biomass in old-field soils than in steppe soils, indicating a positive land-use legacy. However, soil site origin effects depended on the plant species beneath which the soils were collected. The predictive value of abiotic and biotic soil properties in explaining plant biomass differed between and within groups of old-field and steppe species. We conclude that the occurrence of positive land-use legacies for old-field species may retard successional replacement of old-field species by steppe species. However, high levels of idiosyncrasy in responses of old-field and steppe plant species to con- and heterospecific soils indicate interspecific variation in the extent to which soil legacies and plant-soil feedbacks control successional species replacements in Chinese steppe ecosystems.