Co-occurring invasive plant interactions do not predict the impacts of invasion in experimental tallgrass prairie communities
Co-occurring invasive plant interactions do not predict the impacts of invasion in experimental tallgrass prairie communities
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同时发生的入侵植物相互作用并不能预测入侵对实验性高草草原群落的影响
DOI：
10.1007/s10530-019-01984-0
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发表时间：
2019
影响因子：
2.9
通讯作者：
H. Reynolds
中科院分区：
文献类型：
--
作者：
Emma Oschrin;H. Reynolds
共生入侵植物是一种研究较少但很常见的现象，随着气候变化驱动的范围转移，这种现象可能会变得更加频繁。侵入性-侵入性互动可以是竞争性的、中性的或促进的；对称的或不对称的；它们对原住民的影响可以是相加的，也可以是非相加的。非加性影响，即共同发生的入侵或减少或加强彼此的影响，对侵入性管理和本地恢复有更大的影响。我们研究了北美草原草原上共同存在的三种入侵物种--豆科植物莲花、香蓟和草本植物高羊茅之间的相互作用及其对当地草原群落的影响。利用温室微观世界，我们通过单独、成对和三向组合种植入侵物种，观察了入侵-入侵相互作用。为了评估同时发生的入侵的影响，每个单独的入侵者、所有的入侵者对或所有三个入侵者一起成长了本地草原群落。为了深入了解物种相互作用的机制，对地上和地下资源进行了测量。我们预测，入侵豆科植物将通过氮的增加促进其他入侵物种的生长，促进对原生群落的非加性影响。我们观察到，豆科植物促进了其他入侵物种的产量，并与较高的土壤铵含量有关。然而，我们也观察到共存的入侵物种之间强烈的不对称竞争。在不同的入侵处理中，入侵者对功能不同的原生群落的影响是相似的，而基于单一栽培中的入侵影响，入侵者的影响小于预期。这些结果保证了未来对功能群同一性和多样性的测试，作为共同发生的入侵物种相互作用和影响的预测因子。
Co-occurring invasive plants are an understudied yet common phenomenon, and likely to become even more frequent with climate change-driven range shifts. Invasive–invasive interactions can be competitive, neutral, or facilitative; symmetric or asymmetric; and their impact on natives can be additive or non-additive. Non-additive impacts, wherein co-occurring invasives either reduce or enhance one another’s effects, have heightened implications for invasive management and native restoration. We investigated interactions among three invasive species—the legume Lotus corniculatus, the forb Cirsium arvense, and the grass Phalaris arundinacea—that co-occur in North American prairie grassland, and impacts on native prairie communities. Employing greenhouse microcosms, we observed invasive–invasive interactions by growing invasive species alone, in pairs, and in three-way combination. To assess impacts of co-occurring invasives, native prairie communities were grown with each single invader, all pairs of invaders, or all three invaders together. For insight into mechanisms of species interactions, measurements of above- and below-ground resources were made. We predicted that the invasive legume would facilitate the other invasive species via nitrogen enrichment, promoting non-additive impacts on native communities. We observed that the legume promoted yields of the other invasive species and was associated with higher soil ammonium content. However, we also observed strongly asymmetric competition between co-occurring invasive species. Impacts of invaders on functionally diverse native communities were similar among invasion treatments and less than expected based on invasive impacts in monoculture. These results warrant future tests of functional group identity and diversity as predictors of co-occurring invasive species interactions and impacts.
影响因子：
16.8
作者：
Bever JD;Dickie IA;Facelli E;Facelli JM;Klironomos J;Moora M;Rillig MC;Stock WD;Tibbett M;Zobel M
通讯作者：
Zobel M