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Mixed evidence for plant-soil feedbacks in forest invasions

文献类型： 外文期刊

作者： Wei, Wei 1 ; Zhu, Ping 1 ; Chen, Pengdong 1 ; Huang, Qiaoqiao 2 ; Bai, Xinfu 1 ; Ni, Guangyan 3 ; Hou, Yuping 1 ;

作者机构： 1.Ludong Univ, Sch Life Sci, Yantai 264025, Peoples R China

2.Chinese Acad Trop Agr Sci, Key Lab Integrated Pest Management Trop Crops, Minist Agr & Rural Affairs, Environm & Plant Protect Inst, Haikou 571101, Hainan, Peoples R China

3.Chinese Acad Sci, South China Bot Garden, Key Lab Vegetat Restorat & Management Degraded Ec, Guangzhou 510650, Peoples R China

4.Chinese Acad Sci, South China Bot Garden, Guangdong Prov Key Lab Appl Bot, Guangzhou 510650, Peoples R China

关键词： Allelochemicals; Invasion resistance; Native species; Plant-soil feedback; Species trait

期刊名称：OECOLOGIA （ 影响因子：3.225； 五年影响因子：3.665 ）

ISSN： 0029-8549

年卷期： 2020 年 193 卷 3 期

页码：

收录情况： SCI

摘要： 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.

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