Three-way species interactions reverse the positive pairwise effects of two natives on an exotic invader

Three-way species interactions reverse the positive pairwise effects of two natives on an exotic invader
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三向物种相互作用逆转了两个本地物种对外来入侵者的积极成对效应

DOI:
10.1007/s11258-023-01304-6
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发表时间:
2023
期刊:
影响因子:
1.7
通讯作者:
Pratt, Jessica D.
Pratt, Jessica D.
中科院分区:
环境科学与生态学4区
文献类型:
--
作者:
Schlau, Benjamin M.;Huxman, Travis E.;Mooney, Kailen A.;Pratt, Jessica D.

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众所周知,第三物种对其他正向物种成对相互作用的破坏性影响(例如,传粉者综合征中的上下文相关寄生)。然而,很少有研究--如果有的话--调查入侵植物如何影响促进植物与其本地植物群落之间的互动。此外,如果三次入侵物种能够将本地物种之间的相互作用从积极变为消极,那么第三次入侵物种应该能够在本地物种和入侵物种之间的成对相互作用中表现出相同的现象。我们先前的研究表明,在半干旱的加州沿海鼠尾草灌木生境中,入侵的黑芥菜改变了优势种之间的相互作用迹象,否则物种之间的积极相互作用是主要的,本地促进者加州荞麦(Eriogonum Buncule)和它的共同优势受益者加州鼠尾草(Artemisia Calfornica)。在这里,簇毛棘球藻和A.口径烟苗增加B。温室内树种间成对互作中的黑梢生长。然而,在物种间的三向相互作用中,簇毛委陵菜和A.硝酸甘油酯降低了B。在不增加地上部干重的情况下,黑色的SLA、高度和生殖潜力。在物种间的三向交互作用中,黑色假单胞菌没有显著减少。束状细胞促进OFA。卡里福尼卡。同样令人惊讶的是,与b的竞争也很激烈。黑色素导致INA的增加。CalforniaHeight,减少了FA的负面影响。不耐荫口径灯光比赛。在添加田间试验中,卡氏黄曲霉保护E。促进黑麦草萌发和生长的束状物。当水的竞争被最小化时,黑人。综上所述,这项研究证明了在当前入侵生态系统的生态背景下,研究竞争的本土多年生植物之间的物种相互作用的重要性。
The disruptive effects of tertiary species on otherwise positive pairwise species interactions (e.g. context-dependent parasitism in pollinator syndromes) is well-known. However, few—if any—studies have investigated how invasive plants affect interactions between facilitative plants and their native plant communities. Further, if tertiary invasive species can change interactions among native species from positive to negative, then a tertiary native should be capable of the same phenom for pairwise interactions between natives and invasives. Our previous research indicates invasive black mustard (Brassica nigra) changes interaction signs for otherwise positive species interactions between the dominant, native facilitator California buckwheat (Eriogonum fasciculatum) and its co-dominant beneficiary California sagebrush (Artemisia californica) in semi-arid California coastal sage scrub habitat. Here,E. fasciculatumandA. californicaseedlings increasedB. nigrashoot growth in pairwise species interactions in the greenhouse. However, in three-way species interactions,E. fasciculatumandA. californicatogether reducedB. nigraSLA, height, and reproductive potential while not increasing shoot DW. In three-way species interactions,B. nigradid not significantly reduceE. fasciculatumfacilitation ofA. californica. Also surprisingly, light competition withB. nigraresulted in an increase inA. californicaheight,which reduced the negative effects ofA. californicalight competition on shade-intolerantE. fasciculatum.In an additive field experiment,A. californicaprotectedE. fasciculatumfrom facilitating germination and growth ofB. nigrawhen water competition was minimized. Taken together, this study demonstrates the importance of studying species interactions between competitive, native perennials in the current ecological context of invaded ecosystems.
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