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首页> 外文期刊>Polar biology >Seasonal, altitudinal and host plant-related variation in the abundance of aphids (Insecta, Hemiptera) on sub-Antarctic Marion Island
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Seasonal, altitudinal and host plant-related variation in the abundance of aphids (Insecta, Hemiptera) on sub-Antarctic Marion Island

机译：南极马里恩岛上蚜虫（昆虫纲，半翅目）的季节性，高度和寄主植物相关变化

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摘要

Although aphids are the most species-rich group of invasive alien insects across the Southern Ocean Islands, their biology on the islands is poorly known. In this study, host plant-related, seasonal and altitudinal variation in the abundance of the three aphid species {Macrosiphum euphorbiae, Myzus ascalonicus, Rhopalosiphum padi) found on sub-Antarctic Marion Island is examined. Myzus ascalonicus is the most abundant of the species, reaching densities of c. 2,400 individuals per 1,200 cm2 on the indigenous Acaena magellanica (Rosaceae) and 479 individuals per 1,200 cm2 on the indigenous Cotula plumosa (Astera-ceae), with lower numbers at elevations up to 300 m and a pronounced seasonal p;ak in December-February. Macrosiphum euphorbiae occurs on the same plant species in densities of between c. 11 individuals per 1,200 cm2 on C. plumosa and c. 200 individuals per 1,200 cm2 on A. magellanica, and with a pronounced summer peak in December. In both species, small numbers of winged forms are found (c. 1-5%), although they are permanently parthe-nogenetic on the island. Rhopalosiphum padi is also permanently parthenogenetic on the island and likewise shows a December peak in abundance. The current data suggest that low ambient temperatures, which are close to the lower development threshold of R. padi, and other temperate aphid species, limit development in winter, thus leading to a decline in abundance.
机译：尽管蚜虫是整个南大洋群岛中物种最丰富的外来入侵昆虫类，但它们在这些岛屿上的生物学却鲜为人知。在这项研究中，研究了在南极洲马里恩岛上发现的三种蚜虫物种（Macrosiphum euphorbiae，Myzus ascalonicus，Rhodolosiphum padi）的丰度与寄主植物相关的季节和海拔变化。桃金娘是该物种中最丰富的，达到了密度c。蔷薇科（Acaena magellanica）（蔷薇科）每1,200 cm2有2,400个体，而紫睡莲（Astera-ceae）每1,200 cm2有479个人，每海拔300 m的数字较低，并且在12月至2月有明显的季节性p; ak 。大戟大戟以相同的密度发生在同一植物上。 C. plumosa和c。上每1,200 cm2 11个人每棵1,200 cm2上有200个个体，在12月有一个明显的夏季高峰。在这两个物种中，虽然它们在岛上是永久单性遗传的，但发现有少量的有翼形式（约1-5％）。岛上红景天（Rhodolosiphum padi）在岛上也是永久性孤雌生殖的，并且同样显示出12月的高峰。目前的数据表明，低的环境温度接近R. padi和其他温带蚜虫的较低发育阈值，限制了冬季的发育，从而导致丰度下降。

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  • 来源
    《Polar biology》 |2011年第4期|p.513-520|共8页
  • 作者

    Shallin Abraham; Michael J. Somers; Steven L. Chown;

  • 作者单位

    Department of Zoology, Walter Sisulu University,Private Bag XI, Unitra 5117, South Africa,Invertebrate Palaeontology and Geology,Natural History Department, Iziko South African Museum,P O Box 61, Cape Town 8000, South Africa;

    Department of Zoology, Walter Sisulu University,Private Bag XI, Unitra 5117, South Africa,Centre for Invasion Biology, Centre for Wildlife Management,University of Pretoria, Pretoria 0002, South Africa;

    Centre for Invasion Biology, Department of Botany and Zoology,Stellenbosch University, Private Bag XI,Matieland 7602, South Africa;

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  • 正文语种 eng
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  • 关键词

    abundance; herbivory; microclimate; phenology; sap-sucking;

    机译：丰富;食草小气候物候学吸吮;

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