Mixed evidence for plant-soil feedbacks in forest invasions
Mixed evidence for plant-soil feedbacks in forest invasions
复制标题
森林入侵中植物-土壤反馈的混合证据
DOI：
10.1007/s00442-020-04703-y
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发表时间：
2020
期刊：
影响因子：
2.7
通讯作者：
Hou Yuping
中科院分区：
文献类型：
--
作者：
Wei Wei;Zhu Ping;Chen Pengdong;Huang Qiaoqiao;Bai Xinfu;Ni Guangyan;Hou Yuping
植物-土壤反馈（PSFs）是植物介导的土壤性质的变化，最终影响植物的性能，并可以，因此，决定植物多样性，演替和入侵。我们假设，PSF的影响入侵过程和PSF机制在很大程度上是由特定的植物物种产生的土壤性质的变化。为了验证这些假设，我们研究了从常见植物物种下收集的不同土壤对入侵植物美洲商陆生长的影响。我们发现PSFs可能干扰入侵抗性，因为P。与从地下收集的土壤相比，从一些本地物种下面收集的土壤中美洲小树苗的生长减少（生物量较低）。美洲和两种非本土植物。然后，我们选择了8个共同发生的本地和非本地植物物种，并研究PSF的动态和机制，在成对的条件土壤温室实验。美洲商陆对土壤氮素的利用能力强，这可能与其入侵能力强有关。麻栎处理土壤磷素含量显著低于对照，表明麻栎处理土壤磷素有效性较低。针叶林可增强对植物入侵的抵抗力。然而，令人惊讶的是，一些本地植物并没有产生降低入侵植物的相对性能的PSF效应，入侵植物也没有产生增加其自身性能的PSF效应。我们推测，这些PSF的温室实验结果不能外推到现场条件下，因为一些植物的凋落物和化感物质可能是重要的入侵抗性。
Plant–soil feedbacks (PSFs) are plant-mediated changes to soil properties that ultimately influence plant performance, and can, thus, determine plant diversity, succession, and invasion. We hypothesized that PSFs influence invasion processes and that PSF mechanisms are largely driven by changes in soil properties produced by specific plant species. To test these hypotheses, we studied the effects of different soils collected from under common plant species on the growth of the invasive plantPhytolacca americana. We found that PSFs may interfere with invasion resistance becauseP. americanaseedlings showed reduced growth (lower biomass) in soils collected from underneath some native species compared with soils collected from underneathP. americanaand two non-native plants. We then selected eight co-occurring native and non-native plant species, and examined PSF dynamics and mechanisms in a pairwise conditioned soil greenhouse experiment. Plant species-specific conditioning effects regarding soil nutrients and enzyme activities were observed.Phytolacca americanahad a high ability to use soil N, which may be related to its high invasion ability. Soil P was significantly lower inQuercus acutissima-conditioned soil, indicating that lowPavailability inQ. acutissimaforests may enhance resistance to plant invasion. However, surprisingly, some native plants did not produce PSF effects that decreased the relative performance of invasive plants, nor did the invasive plants produce PSF effects that increased their own performance. We speculate that these PSF findings from greenhouse experiments cannot be extrapolated to field conditions because the litter and allelochemicals of some plants may be important for invasion resistance.