Bayesian species delimitation reveals generalist and specialist parasitic wasps on Galerucella beetles (Chrysomelidae): sorting by herbivore or plant host.
Bayesian species delimitation reveals generalist and specialist parasitic wasps on Galerucella beetles (Chrysomelidae): sorting by herbivore or plant host.
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DOI：
10.1186/1471-2148-13-92
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发表时间：
2013-04-27
影响因子：
3.4
通讯作者：
Bergsten J
中科院分区：
文献类型：
--
作者：
Hambäck PA;Weingartner E;Ericson L;Fors L;Cassel-Lundhagen A;Stenberg JA;Bergsten J
要了解食物网中物种相互作用的生态和进化后果，就必须正确识别相互作用。遗传分析表明，许多所谓的通才寄生物种应该被定义为饮食范围更窄的多个物种，从而降低这些物种介导间接相互作用（例如宿主之间明显竞争）的可能性。最近的研究表明，寄生蜂 Asecodes lucens 介导两种宿主（Galerucella tenella 和 G. calmariensis）之间的明显竞争，影响相互作用强度和进化反馈。 Galerucella 属的其他物种也记录到了相同的寄生蜂，这表明其他物种对也可能发生类似的间接影响。为了探索这种相互作用的可能性，我们对线粒体和核遗传标记进行了测序，以解析宿主和寄生蜂的系统发育，并测试所涉及的寄生蜂物种的数量。因此，我们从 8 个寄主植物物种中收集了 139 个 Galerucella 幼虫，并对 31 个成年甲虫和 108 个拟寄生物个体进行了测序。对 Galerucella 数据的分析（还包括之前研究的序列）证实了之前记录的 5 个物种是互为单系的，但 A. lucens 的贝叶斯物种界定表明有 3-4 个隐秘类群，其宿主用途比之前建议的更专业。在多物种合并模型下分析的基因数据使我们能够重建寄主和寄生蜂的物种树系统发育，并且我们发现了完全一致的共同进化模式，表明寄生蜂物种形成遵循寄主物种形成。在贝叶斯物种定界分析中使用多位点序列数据，我们提出感染 Galerucella 幼虫的 Asecodes 属膜翅目寄生蜂构成至少三个具有狭窄食性呼吸的物种。寄生蜂 Asecodes 和宿主 Galerucella 的进化表现出完全一致的共同进化模式。这一发现强化了这样的假设：寄主搜索中的寄生蜂使用寄主的线索，而不是寄主和植物的更一般的线索。
To understand the ecological and evolutionary consequences of species interactions in food webs necessitates that interactions are properly identified. Genetic analyses suggest that many supposedly generalist parasitoid species should rather be defined as multiple species with a more narrow diet, reducing the probability that such species may mediate indirect interactions such as apparent competition among hosts. Recent studies showed that the parasitoid Asecodes lucens mediate apparent competition between two hosts, Galerucella tenella and G. calmariensis, affecting both interaction strengths and evolutionary feedbacks. The same parasitoid was also recorded from other species in the genus Galerucella, suggesting that similar indirect effects may also occur for other species pairs. To explore the possibility of such interactions, we sequenced mitochondrial and nuclear genetic markers to resolve the phylogeny of both host and parasitoid and to test the number of parasitoid species involved. We thus collected 139 Galerucella larvae from 8 host plant species and sequenced 31 adult beetle and 108 parasitoid individuals. The analysis of the Galerucella data, that also included sequences from previous studies, verified the five species previously documented as reciprocally monophyletic, but the Bayesian species delimitation for A. lucens suggested 3–4 cryptic taxa with a more specialised host use than previously suggested. The gene data analyzed under the multispecies coalescent model allowed us to reconstruct the species tree phylogeny for both host and parasitoid and we found a fully congruent coevolutionary pattern suggesting that parasitoid speciation followed upon host speciation. Using multilocus sequence data in a Bayesian species delimitation analysis we propose that hymenopteran parasitoids of the genus Asecodes that infest Galerucella larvae constitute at least three species with narrow diet breath. The evolution of parasitoid Asecodes and host Galerucella show a fully congruent coevolutionary pattern. This finding strengthens the hypothesis that the parasitoid in host search uses cues of the host rather than more general cues of both host and plant.
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影响因子：
56.9
作者：
Forbes, Andrew A.;Powell, Thomas H. Q.;Feder, Jeffrey L.
通讯作者：
Feder, Jeffrey L.
影响因子：
1.4
作者：
Brassil, CE;Abrams, PA
通讯作者：
Abrams, PA
DOI：
10.1007/pl00011983
发表时间：
1999-04-01
期刊：
RESEARCHES ON POPULATION ECOLOGY
影响因子：
--
作者：
Bonsall, MB;Hassell, MP
通讯作者：
Hassell, MP
影响因子：
1.9
作者：
Dickey, Aaron M.;Medina, Raul F.
通讯作者：
Medina, Raul F.
影响因子：
2.3
作者：
Bartelt, Robert J.;Cosse, Allard A.;Post, Susan L.
通讯作者：
Post, Susan L.