Molecular species delimitation of a symbiotic fig-pollinating wasp species complex reveals extreme deviation from reciprocal partner specificity.
Molecular species delimitation of a symbiotic fig-pollinating wasp species complex reveals extreme deviation from reciprocal partner specificity.
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DOI：
10.1186/s12862-014-0189-9
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发表时间：
2014-09-18
影响因子：
3.4
通讯作者：
Cook JM
中科院分区：
文献类型：
--
作者：
Darwell CT;al-Beidh S;Cook JM
共生关系促进了重大的进化创新、基本生态系统功能的维持以及生物多样性的产生和维持。然而，主机/共生体协会，这对他们的动态有重要影响的确切性质，往往知之甚少，由于有限的了解共生体分类和物种多样性。在经典的共生体中，无花果和它们的传粉小蜂构成了热带森林和萨凡纳环境中高度多样化的关键资源。从历史上看，它们被认为是极端互惠伙伴特异性（一对一的宿主共生物种关系），但最近的工作揭示了几个更复杂的情况。然而，有一个显着缺乏的研究与评估共生体多样性的具体目标，以及如何在整个地理范围内的主机变化。在这里，我们使用分子生物学方法来研究一个广泛的澳大利亚无花果物种的传粉黄蜂的隐蔽多样性。标准的条形码基因和方法是没有结论性的，但纳入系统发育分析和最近开发的核条形码基因（ITS 2），给了强有力的支持，五个传粉昆虫物种。每种传粉者在不同的地理区域是最常见的，强调广泛的地理采样的重要性，以揭示多样性，以及在整个宿主植物范围内的共同进化轨迹的分歧范围。此外，大多数地区有多种共存的传粉者，这就提出了它们如何在显然相似或相同的资源生境中共存的问题。我们的研究提供了一个引人注目的例子，极端偏离互惠合作伙伴的特异性在整个地理范围内的无花果黄蜂系统。它还表明，表面上相同的物种可能能够共存于一个互惠的设置，虽然在不同的频率，有关他们的无花果主机的范围。我们表明，可能需要全面的采样和分子分类技术，以揭示支持亲密的生态相互作用的神秘的生物多样性的真实结构。本文的在线版本（doi：10.1186/s12862-014-0189-9）包含补充材料，可供授权用户使用。
Symbiotic relationships have contributed to major evolutionary innovations, the maintenance of fundamental ecosystem functions, and the generation and maintenance of biodiversity. However, the exact nature of host/symbiont associations, which has important consequences for their dynamics, is often poorly known due to limited understanding of symbiont taxonomy and species diversity. Among classical symbioses, figs and their pollinating wasps constitute a highly diverse keystone resource in tropical forest and savannah environments. Historically, they were considered to exemplify extreme reciprocal partner specificity (one-to-one host-symbiont species relationships), but recent work has revealed several more complex cases. However, there is a striking lack of studies with the specific aims of assessing symbiont diversity and how this varies across the geographic range of the host. Here, we use molecular methods to investigate cryptic diversity in the pollinating wasps of a widespread Australian fig species. Standard barcoding genes and methods were not conclusive, but incorporation of phylogenetic analyses and a recently developed nuclear barcoding gene (ITS2), gave strong support for five pollinator species. Each pollinator species was most common in a different geographic region, emphasising the importance of wide geographic sampling to uncover diversity, and the scope for divergence in coevolutionary trajectories across the host plant range. In addition, most regions had multiple coexisting pollinators, raising the question of how they coexist in apparently similar or identical resource niches. Our study offers a striking example of extreme deviation from reciprocal partner specificity over the full geographical range of a fig-wasp system. It also suggests that superficially identical species may be able to co-exist in a mutualistic setting albeit at different frequencies in relation to their fig host’s range. We show that comprehensive sampling and molecular taxonomic techniques may be required to uncover the true structure of cryptic biodiversity underpinning intimate ecological interactions. The online version of this article (doi:10.1186/s12862-014-0189-9) contains supplementary material, which is available to authorized users.
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DOI：
10.1098/rsbl.2003.0025
发表时间：
2003-08-07
影响因子：
4.7
作者：
Hebert, PDN;Ratnasingham, S;deWaard, JR
通讯作者：
deWaard, JR
影响因子：
3.4
作者：
Haine, Eleanor R.;Martin, Joanne;Cook, James M.
通讯作者：
Cook, James M.
影响因子：
6.5
作者：
De Queiroz, Kevin
通讯作者：
De Queiroz, Kevin
影响因子：
1.6
作者：
Dixon, DJ;Jackes, BR;Bielig, LM
通讯作者：
Bielig, LM
无花果树位于其分布范围的北端：神秘传粉媒介的分布表明存在多个冰川保护区
影响因子：
4.9
作者：
Chen, Yan;Compton, Stephen G.;Chen, Xiao-Yong
通讯作者：
Chen, Xiao-Yong