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首页> 外文期刊>Ecological research >A hybrid of the invasive plant Sphagneticola trilobate has similar competitive ability but different response to nitrogen deposition compared to parent
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A hybrid of the invasive plant Sphagneticola trilobate has similar competitive ability but different response to nitrogen deposition compared to parent

机译：与亲本相比，入侵植物三叶草天花的杂种具有相似的竞争能力，但对氮沉积的反应不同

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摘要

Hybridization between introduced and related native species has been suggested to be a key driving force of evolutionary processes in invasions that may be accelerated by increasing nitrogen (N) deposition. We carried out two experiments to compare the competitive ability of a newly-reported putative hybrid (Sphagneticola calendulacea x Sphagneticola trilobata) to that of its invasive paternal parent and investigate its response to different N additions. Growth of the hybrid increased by 39.62 ± 15.69 % when grown with the native parent but showed no significant changes when grown with the invasive parent. Growth of invasive S. trilobata showed no significant changes when grown with the other two taxa. The hybrid and invasive parent inhibited the growth of the native parent by 33.27 ± 15.26 % and 78.56 ± 3.13 %, respectively. Low level N addition (50 kg N ha~(-1)) enhanced the growth of both the hybrid and native parent, whereas medium and high levels of N additions (150, 300 kg N ha~(-1)) had no effects on hybrid growth but decreased native parent growth. However, all N treatments had no significant effects on the growth of the invasive parent. Our results suggest that the hybrid is an equal competitor to its invasive parent and is more susceptible to N deposition. Therefore, this hybrid could be a threat to native diversity but may decline more than the invasive parent under high N conditions.
机译：已经提出，引入的和相关的本地物种之间的杂交是入侵过程中进化过程的关键驱动力，入侵过程可能通过增加氮（N）沉积而加速。我们进行了两个实验，以比较新近报道的推定杂种（Sphagneticola calendulacea x Sphagneticola trilobata）与其入侵父本的竞争能力，并研究其对不同氮素添加量的反应。当与天然亲本一起生长时，杂种的生长增加了39.62±15.69％，但是当与侵入性亲本一起生长时，没有显示出明显的变化。与其他两个分类单元一起生长时，入侵性三叶链球菌的生长没有显示出显着变化。杂种和侵入性亲本分别抑制了天然亲本的生长33.27±15.26％和78.56±3.13％。低水平的氮添加（50 kg N ha〜（-1））促进了杂种和本地亲本的生长，而中等和高水平的氮添加（150、300 kg N ha〜（-1））没有影响。杂种生长，但原生亲本生长下降。然而，所有的N种治疗对侵入性父母的生长都没有显着影响。我们的结果表明，杂种与其入侵母体具有同等的竞争优势，并且更容易受到氮沉降的影响。因此，在高氮条件下，这种杂种可能对本地多样性构成威胁，但其下降程度可能比侵入性亲本更大。

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  • 来源
    《Ecological research》 |2014年第2期|331-339|共9页
  • 作者

    Guangyan Ni; P. Zhao; W. Wn; X.-K. Lu; X.-H. Zhao; L.-W. Zhu; J.-F. Niu;

  • 作者单位

    Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden,Chinese Academy of Sciences, 723 Xingke Road,Guangzhou 510650 Guangdong, China;

    Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden,Chinese Academy of Sciences, 723 Xingke Road,Guangzhou 510650 Guangdong, China;

    Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden,Chinese Academy of Sciences, 723 Xingke Road,Guangzhou 510650 Guangdong, China;

    Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden,Chinese Academy of Sciences, 723 Xingke Road,Guangzhou 510650 Guangdong, China;

    Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden,Chinese Academy of Sciences, 723 Xingke Road,Guangzhou 510650 Guangdong, China;

    Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden,Chinese Academy of Sciences, 723 Xingke Road,Guangzhou 510650 Guangdong, China;

    Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden,Chinese Academy of Sciences, 723 Xingke Road,Guangzhou 510650 Guangdong, China;

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  • 正文语种 eng
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  • 关键词

    Invasive-derived hybridization; Competition; N addition; Invasiveness; Sphagneticola;

    机译：入侵衍生杂交;竞争;N添加;侵袭性香蒲;

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