What processes shape early-successional vegetation in fly ash and mine tailings?

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• 作者：Jana Urbanová ; Pavel Kovář ; Petr Dostál
• 关键词：Abiotic environmental filters ; Dispersal limitation ; Human ; made habitats ; Plant functional traits ; Plant species richness ; Regional species pool ; Vegetation succession
• 刊名：Plant Ecology
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：218
• 期：2
• 页码：127-137
• 全文大小：
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Ecology; Plant Ecology; Community & Population Ecology; Terrestial Ecology; Applied Ecology; Biodiversity;
• 出版者：Springer Netherlands
• ISSN：1573-5052
• 卷排序：218

文摘

Local abiotic filters and regional processes (i.e., regional pools of species that are dispersal-limited to varying degrees) interactively structure the development of vegetation in human-disturbed habitats, yet their relative contributions to this process are still to be determined. In this study conducted in the Czech Republic, we related plant species diversity and composition of 10 fly ash and 7 mine tailings to local edaphic conditions, and to vegetation from a 100-m perimeter (regional species pool). We found that the species richness and composition on the tailings were significantly associated with diversity and composition of vegetation in the surroundings, but not with the local edaphic conditions. Species from adjacent vegetation that were more abundant and those producing lighter seeds were more likely to establish on the tailings. The same characteristics also enhanced species abundance on the tailings, but the two predictors explained less than 10% in variation of establishment success or of species abundance. A non-significant relationship between species number and tailings size, but a significant association between diversity and time of vegetation development indicate that the study systems are still far from equilibrium. Our study provides evidence for a strong effect of regional processes, with a limited influence of measured edaphic conditions on plant communities developing de novo. It also highlights the necessity to consider the broader spatial context in the analysis of vegetation succession in human-disturbed habitats.