Geotaxis and leaf-surface prererences mitigale negative effects of a predatory mite on an herbivorous mite.
Geotaxis and leaf-surface prererences mitigale negative effects of a predatory mite on an herbivorous mite.
复制标题
趋地性和叶表面偏好可减轻捕食性螨对食草螨的负面影响。
DOI：
10.1007/s10493-012-9622-1
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发表时间：
2013
影响因子：
2.2
通讯作者：
Masahiro Osakabe
中科院分区：
文献类型：
--
作者：
Masaaki Sudo;Masahiro Osakabe
植食性螨的繁殖成功率和种群增长受到植绥螨捕食者活动的限制。然而，发生在上与下叶表面有时不匹配这些猎物和捕食者之间。这种不匹配可能减轻被捕食物种的捕食风险。我们评估了影响叶表面螨分布的因素，测试是否存在的植绥螨Phytoseius nipponicacutters的叶表面分布和繁殖成功的食草性假蜘蛛螨Brevipalpus obovatus。寄主植物为大叶荚？（Viburnum erosumvar.punctatum）。使用实验装置将叶设置为自然（真）和颠倒（倒置;倒置）方向。两个表面都可以接触到螨虫。我们检测到较低的和远轴叶表面的偏好在P。日本人与此相反，上和近轴面的首选由B。倒卵圆形。因此，猎物和捕食螨积累在不同侧面的叶子。捕食者的存在也间接降低了B. Brevipalpusobovatusfemales积极避免叶表面捕食者数量增加，这些女性转移他们的分布和改变产卵地点叶表面捕食者较少。因此，叶上两侧的B.obovatuseggs被捕食的频率低于叶下两侧。我们建议，在这个特定的草食性螨种上叶表面开发减轻植绥螨，喜欢较低的叶表面捕食风险。
Reproductive success and population growth of an herbivorous mite are limited by activities of phytoseiid predators. However, occurrences on upper versus lower leaf surfaces are sometimes mismatched between these prey and predators. The mismatch potentially mitigates predation risk for the prey species. We assessed factors that affect mite distributions on leaf surfaces, testing whether the presence of the phytoseiid mitePhytoseius nipponicusalters the leaf-surface distribution and reproductive success of the herbivorous false spider miteBrevipalpus obovatus. The host plant wasViburnum erosumvar.punctatum(Adoxaceae). Leaves were set in natural (TRUE) and reversed (upside down; INVERTED) orientations using experimental devices. Both surfaces were accessible to mites. We detected lower and abaxial leaf-surface preferences inP. nipponicus. In contrast, upper and adaxial surfaces were preferred byB. obovatus. Thus, prey and predatory mites accumulated on different sides of leaves. Presence of the predator also indirectly decreased egg production inB. obovatus.Brevipalpusobovatusfemales actively avoided leaf surfaces with elevated predator numbers; these females shifted their distributions and changed oviposition sites to leaf surfaces with fewer predators. In consequence,B.obovatuseggs on the upper sides of leaves were less frequently preyed upon than were those on lower sides. We suggest that upper leaf-surface exploitation in this particular herbivorous mite species mitigates predation risk from phytoseiid mites, which prefer lower leaf surfaces.