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首页> 外文期刊>Polar biology >Negative impact of leaf gallers on arctic-alpine dwarf willow, Salix herbacea
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Negative impact of leaf gallers on arctic-alpine dwarf willow, Salix herbacea

机译：叶gall虫对北极高山矮柳柳柳的负面影响

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摘要

According to available evidence, leaf gallers have only minor impacts on their plant hosts. We hypothesised that the relatively large leaf gallers formed by Eupontania sawflies on small, creeping arctic-alpine willows have a strong influence on their host plants. In this study, we specifically tested the effects of leaf galler (Eupontania aquilonis) on the survival and growth of dwarf willow (Salix herbacea) in a mountain snow-bed in northern Finland. We marked galled, leaves-removed and untreated ramets in experimental blocks. In the following year, we measured the growth and survival of the ramets. The mortality of galled shoots was approx. 40% higher, and the mortality of galled ramets approx. 25% higher than in the control ramets and in the leaf-removal treatment. The leaf biomass of galled ramets and the number of leaves were significantly less in galled ramets than in untreated or leaves-removed ramets. It is possible that galling causes fatal resource depletion of shoots in its host plant. The results show that leaf gallers are ecologically more influential than previously thought.
机译：根据现有证据，叶gall对植物寄主的影响很小。我们假设由Eupontania形成的相对较大的叶片gall虫在小的蠕动的北极高山杨柳上成虫，对它们的寄主植物有很大的影响。在这项研究中，我们专门测试了叶gall（Eupontania aquilonis）对矮小柳（Salix herbacea）在芬兰北部山区雪床上的生存和生长的影响。我们在实验块上标记了擦伤，去叶和未处理的分株。在接下来的一年，我们测量了分株的生长和存活。枯萎芽的死亡率约为。高出40％，子的死亡率约为比对照分株和去叶处理高25％。与未处理或摘除叶片的分株相比，没药的分株的叶片生物量和叶片数明显减少。擦伤可能会导致其寄主植物的新梢致命性资源枯竭。结果表明，叶胆在生态上的影响比以前认为的要大。

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