Do invasive alien plants differ from non-invasives in dominance and nitrogen uptake in response to variation of abiotic and biotic environments under global anthropogenic change?
Do invasive alien plants differ from non-invasives in dominance and nitrogen uptake in response to variation of abiotic and biotic environments under global anthropogenic change?
复制标题
外来入侵植物在应对全球人为变化下非生物和生物环境变化的优势和氮吸收方面是否与非入侵植物不同？
DOI：
10.1016/j.scitotenv.2019.04.024
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发表时间：
2019
影响因子：
9.8
通讯作者：
Yu Fei Hai
中科院分区：
文献类型：
--
作者：
Liu Yuan Yuan;Sun Yan;Mueller Schaerer Heinz;Yan Rong;Zhou Zhi Xiang;Wang Yong Jian;Yu Fei Hai
植物入侵是全球人为变化下生物和非生物环境（即富营养化和人类诱导的繁殖体）复杂相互作用的结果。在此，我们想知道为什么在全球人为变化下，随着非生物和生物环境的变化，在引入范围内，一些外来克隆植物物种会成为入侵物种，而另一些则不会。在中国选择3种外来入侵植物和3种共生的外来无性系植物，在植物繁殖体压力（即模拟人为外来繁殖体压力）低或高的原生群落中，在恒定或可变的土壤养分环境下进行生长。外来入侵物种比非入侵物种产生更多的生物量。有趣的是，入侵物种比非入侵物种从高繁殖压力中受益更大。非入侵目标种的生物量和均匀度高于入侵目标种。与不变养分相比，入侵植物在不同养分条件下叶片氮含量的增加和C: N比值的降低明显高于非入侵植物。不同营养物质对原生群落均匀度的负面影响在入侵目标种下显著大于非入侵目标种。本土群落生物量与入侵物种生物量呈显著负相关。在高繁殖体压力下，不同的养分显著促进了非入侵物种与本土群落的负生物量关系以及入侵物种与本土群落的负生物量均匀度关系。研究表明，土壤养分变异性和营养繁殖体压力影响外来无性系植物的生长和叶片对C和N的吸收，特别是在高繁殖体压力和养分变异性下。外来无性系入侵种具有比非入侵种更高的性能和优势。未来的研究还应该测试入侵和非入侵或本地植物在本地或引种范围的本地群落中的差异机制。
Plant invasion is the outcome of complicated interactions of both biotic and abiotic environments (i.e. eutrophication and human-induced propagules) under global anthropogenic change. Here, we want to know why some alien clonal plant species become invasive and others do not in the introduced range with variations of both abiotic and biotic environments under global anthropogenic change.We selected three invasive alien and three co-occurring, non-invasive alien clonal plant species in China, and grew them under the constant or variable soil nutrient environments in a native community with low or high vegetative propagule pressure (i.e. simulating pressure of anthropogenic alien propagules).Invasive alien species produced more biomass than non-invasives. Interestingly, invasive species benefited significantly greater from high propagule pressure than non-invasives. Biomass and evenness of native communities were greater with non-invasive than with invasive target species. Invasive plants showed a greater increase of leaf N and decrease of leaf C: N ratio when subject to variable nutrients in comparison to constant nutrients than non-invasives.The negative effects of variable nutrients on evenness of native communities were significantly greater under invasive than non-invasive target species. Moreover, biomass of native communities was significantly negatively related to biomass of invasive species. Variable nutrients significantly promoted the negative biomass relationship between non-invasive species and native communities under high propagule pressure and the negative biomass-evenness relationship between invasive species and native communities.Our study suggests that soil nutrient variability and vegetative propagule pressure influence the growth and leaf C and N uptake of alien clonal plant species in native experimental communities, especially under the high propagule pressure and nutrient variability. Invasive alien clonal species have higher performance and advantages over non-invasives. Future studies should also test the mechanisms that invasive and non-invasive or native plants differ in native communities of native or introduced ranges in the field.