Shen Nan, Yu Hongwei, Yu Siqi, Yu Dan, Liu Chunhua
The National Field Station of Freshwater Ecosystem of Liangzi Lake, Department of Ecology, College of Life Sciences, Wuhan University, Wuhan, China.
Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, China.
Front Plant Sci. 2019 May 30;10:723. doi: 10.3389/fpls.2019.00723. eCollection 2019.
Spatial heterogeneity in soil nutrient availability is considered to play an important role in promoting plant invasion success and can affect interspecific competition. Although some clonal plants have been demonstrated to be correlated with resource heterogeneity in terrestrial systems, little is known about how soil nutrient heterogeneity affects the growth of invasive aquatic plants or their population structure. A greenhouse experiment was therefore conducted to study the response of the invasive aquatic plant to the spatial heterogeneity of soil nutrients under three plant densities (one, four, or twelve plants 0.28 m) with a constant amount of soil nutrients. The results showed that soil nutrient heterogeneity significantly increased the number of shoots in the single-plant density treatment. However, heterogeneous soil nutrient treatment significantly increased the number of shoots at the expense of total biomass and aboveground biomass in the twelve-plant density treatment. The heterogeneous soil nutrient treatment had low effects on other growth traits and intraspecific competition under different plant density treatments. These results indicate that spatial heterogeneity in soil nutrient availability may facilitate the spread of .
土壤养分有效性的空间异质性被认为在促进植物入侵成功方面发挥着重要作用，并且会影响种间竞争。尽管一些克隆植物已被证明与陆地系统中的资源异质性相关，但对于土壤养分异质性如何影响入侵水生植物的生长或其种群结构却知之甚少。因此，进行了一项温室实验，以研究在土壤养分总量恒定的情况下，入侵水生植物在三种植物密度（每0.28平方米1株、4株或12株）下对土壤养分空间异质性的响应。结果表明，土壤养分异质性在单株密度处理中显著增加了枝条数量。然而，在12株密度处理中，异质土壤养分处理显著增加了枝条数量，但以总生物量和地上生物量为代价。在不同植物密度处理下，异质土壤养分处理对其他生长性状和种内竞争的影响较小。这些结果表明，土壤养分有效性的空间异质性可能有助于[植物名称]的扩散。 （注：原文中最后“the spread of.”后面缺少具体植物名称）
