Ye Xiaoqi, Meng Jinliu, Ma Ruixiang, Wu Ming
Research Station of Hangzhou Bay Wetland Ecosystems, Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou 311400, China.
Biology (Basel). 2023 Sep 26;12(10):1282. doi: 10.3390/biology12101282.
The restoration of native plants in invaded habitats is constrained with the presence of highly competitive exotic species. Aboveground removal, such as clipping or mowing, of invasive plants is required for successful restoration. The effects of clipping an invasive plant species, , grown at five densities (1-5 plants per pot), and planting two co-occurring and competitive species, and , on the growth of both the invasive species and the co-occurring species were investigated in a greenhouse experiment. The established suppressed the growth of planted seedlings with 47.8-94.4% reduction in biomass, with stronger effects at higher densities; clipping significantly reduced 97.5-97.4% of biomass of and ameliorated the suppression effects (with only 8.7-52.7% reduction in biomass of the co-occurring plants), irrespective of density. Both the aboveground and belowground part of contributed to its suppression effects on planted co-occurring species. Seed sowing of co-occurring species reduced the belowground growth, but not the underground growth of . appeared to be more effective at reducing the growth of than . Therefore, clipping together with planting competitive species that can overcome the belowground priority effects of could be a promising strategy for controlling invasion and restoring native plant communities.
在被入侵的栖息地中，本地植物的恢复受到具有高度竞争力的外来物种的限制。为了成功恢复，需要对入侵植物进行地上部分清除，如修剪或割草。在温室实验中，研究了对一种入侵植物物种（以五种密度种植，每盆1 - 5株）进行修剪，并种植两种同时存在且具有竞争力的物种，对入侵物种和同时存在的物种生长的影响。已定植的入侵植物抑制了种植幼苗的生长，生物量减少了47.8 - 94.4%，在较高密度下影响更强；无论密度如何，修剪显著减少了入侵植物生物量的97.5 - 97.4%，并改善了抑制效果（同时存在的植物生物量仅减少8.7 - 52.7%）。入侵植物的地上部分和地下部分都对其对同时种植的物种的抑制作用有贡献。同时存在的物种的种子播种减少了入侵植物的地下生长，但没有减少其地上生长。一种同时存在的物种似乎比另一种在减少入侵植物生长方面更有效。因此，修剪结合种植能够克服入侵植物地下优先效应的竞争物种，可能是控制入侵植物入侵和恢复本地植物群落的一种有前景的策略。
