Patterns of temporal and enemy niche use by a community of leaf cone moths Caloptilia coexisting on maples Acer as revealed by metabarcoding
Patterns of temporal and enemy niche use by a community of leaf cone moths Caloptilia coexisting on maples Acer as revealed by metabarcoding
复制标题
元条形码揭示了在枫树宏碁上共存的叶锥蛾 Caloptilia 群落对时间和天敌生态位的利用模式
DOI：
10.1111/mec.14105
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发表时间：
2017
影响因子：
4.9
通讯作者：
R. & A. Kawakita
中科院分区：
文献类型：
--
作者：
Nakadai;R. & A. Kawakita
草食性昆虫的多样性通常被认为是寄主植物多样性的函数。然而，最近的研究发现了许多密切相关的食草动物使用相同寄主植物的例子(S)，这表明寄主植物的分割并不是产生多样性的唯一机制。共享寄主的食草动物可以利用同一植物的不同部分，但这种资源划分往往不明显；因此，允许密切相关的食草动物共存的因素在很大程度上仍不确定。我们研究了物候期或天敌的划分是否可以解释枫树(宏；无患科)叶圆锥蛾(Caloptila；Gracillariidae)的共存。利用高通量测序技术，每隔2~3周对9种枫树上发现的10种共生拟小蜂的幼虫活动进行监测，共13次采样事件，对其内部寄生蜂进行穷尽搜索。采用封闭式引物对飞蛾组织中的黄蜂幼虫进行检测。我们发现不同种之间的物候有相当大的重叠，在7月和9-10月有两个明显的高峰期。寄生种类也有很大程度的重叠，共有13种小蜂和姬蜂以非特异性方式寄生，总寄生率为46.4%。虽然这项研究中没有考虑的因素可能会促进共存，但似乎生态位划分并不是密切相关的食草动物稳定共存于共享宿主上所必需的。没有资源划分的共生可能提供一个额外的轴，沿着这个轴，草食昆虫获得更多的物种丰富度。
The diversity of herbivorous insects is often considered a function of host plant diversity. However, recent research has uncovered many examples of closely related herbivores using the same host plant(s), suggesting that partitioning of host plants is not the only mechanism generating diversity. Herbivores sharing hosts may utilize different parts of the same plant, but such resource partitioning is often not apparent; hence, the factors that allow closely related herbivores to coexist are still largely undetermined. We examined whether partitioning of phenology or natural enemies may explain the coexistence of leaf cone moths (Caloptilia; Gracillariidae) associated with maples (Acer; Sapindaceae). Larval activity of 10 sympatricCaloptiliaspecies found on nine maple species was monitored every 2–3 weeks for a total of 13 sampling events, and an exhaustive search for internal parasitoid wasps was conducted using high‐throughput sequencing. Blocking primers were used to facilitate the detection of wasp larvae inside moth tissue. We found considerable phenological overlap amongCaloptiliaspecies, with two clear peaks in July and September–October. CoexistingCaloptiliaspecies also had largely overlapping parasitoid communities; a total of 13 chalcid and ichneumon wasp species attackedCaloptiliain a nonspecific fashion at an overall parasitism rate of 46.4%. Although coexistence may be facilitated by factors not accounted for in this study, it appears that niche partitioning is not necessary for closely related herbivores to stably coexist on shared hosts. Co‐occurrence without resource partitioning may provide an additional axis along which herbivorous insects attain increased species richness.