Yu Hanxia, Yue Maofeng, Wang Cui, Le Roux Johannes J, Peng Changlian, Li Weihua
Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, Guangzhou Key Laboratory of Subtropical Biodiversity and Biomonitoring, School of Life Sciences South China Normal University Guangzhou China.
School of Biological and Food Engineering Guangdong University of Petrochemical Technology Maoming China.
Ecol Evol. 2020 Nov 4;10(23):13355-13369. doi: 10.1002/ece3.6938. eCollection 2020 Dec.
Selecting native species for restoration is often done without proper ecological background, particularly with regard to how native and invasive species interact. Here, we provide insights suggesting that such information may greatly enhance restoration success. The performance of the native vine, , and that of the invasive bitter vine, , were investigated in South China to test how priority effects (timing and rate of germination and seedling growth) and competition (phytochemical effects and competitive ability) impact invasive plant performance. We found that, in the absence of competition, the germination rate of , but not of , was significantly affected by light availability. seedlings also performed better than those of during early growth phases. Under competition, negative phytochemical effects of on were strong and we found to have lower performance when grown with compared to when grown by itself. Relative interaction indexes indicated that, under interspecific competition, negatively affected (i.e., inhibited) , whereas positively affected (i.e., facilitated) . Higher photosynthetic efficiency and soil nutrient utilization put at a further advantage over . Field trails corroborated these experimental findings, showing little recruitment of in previously invaded and cleared field plots that were sown with . Thus, is a promising candidate for ecological restoration and for reducing impacts of in China. This research illustrates that careful species selection may improve restoration outcomes, a finding that may also apply to other invaded ecosystems and species.
选择本地物种进行生态恢复时，往往缺乏适当的生态背景知识，尤其是在本地物种与入侵物种如何相互作用方面。在此，我们提供的见解表明，此类信息可能会大大提高恢复的成功率。在中国南方，我们对本地藤本植物[物种名称1]和入侵性苦藤[物种名称2]的表现进行了研究，以测试优先效应（发芽和幼苗生长的时间和速率）和竞争（植物化学效应和竞争能力）如何影响入侵植物的表现。我们发现，在没有竞争的情况下，[物种名称1]的发芽率受光照可用性的显著影响，而[物种名称2]不受影响。在早期生长阶段，[物种名称1]的幼苗表现也优于[物种名称2]。在竞争条件下，[物种名称2]对[物种名称1]的负面植物化学效应很强，我们发现与单独生长相比，[物种名称1]与[物种名称2]一起生长时表现较差。相对相互作用指数表明，在种间竞争中，[物种名称2]对[物种名称1]有负面影响（即抑制），而[物种名称1]对[物种名称2]有正面影响（即促进）。较高的光合效率和土壤养分利用率使[物种名称1]比[物种名称2]更具优势。田间试验证实了这些实验结果，表明在先前被入侵并清理过的、播种了[物种名称2]的田间地块中，[物种名称1]的幼苗很少。因此，[物种名称1]是中国生态恢复和减少[物种名称2]影响的一个有前景的候选物种。这项研究表明，谨慎选择物种可能会改善恢复结果，这一发现也可能适用于其他受入侵的生态系统和物种。
