Pollinator sharing and gene flow among closely related sympatric dioecious fig taxa

Wang, Gang; Cannon, Charles H.; Chen, Jin

doi:10.1098/rspb.2015.2963

Cited by 56 publications

(96 citation statements)

References 51 publications

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“…Fig wasp colonization events followed by host switches have been reported among Ficus species (Wachi, Kusumi, Tzeng, & Su, ), but the northern, montane distribution of F. tikoua means that there is little range overlap with other Ficus species and fewer opportunities for host switching than would be the case for a tropical species. It is more common for fig wasps that share a host Ficus to be “cryptic” species that are difficult to tell apart morphologically (Chen et al, ; Darwell, Al‐Beidh, & Cook, ; Darwell & Cook, ; Rodriguez et al, ; Segar et al, ; Wachi et al, ; Wang, Cannon, & Chen, ; Yu, Tian, et al, ). They are typically sister species that have diverged during the history of their association with the plant (Souto‐Vilaros et al, ; Wang et al, ; Yang et al, ; Yu, Tian, et al, ).…”

Section: Discussionmentioning

confidence: 99%

“…It is more common for fig wasps that share a host Ficus to be “cryptic” species that are difficult to tell apart morphologically (Chen et al, ; Darwell, Al‐Beidh, & Cook, ; Darwell & Cook, ; Rodriguez et al, ; Segar et al, ; Wachi et al, ; Wang, Cannon, & Chen, ; Yu, Tian, et al, ). They are typically sister species that have diverged during the history of their association with the plant (Souto‐Vilaros et al, ; Wang et al, ; Yang et al, ; Yu, Tian, et al, ). Ficus tikoua appears to be typical in this regard, except that the extent of divergence of its pollinators has been more limited.…”

Section: Discussionmentioning

confidence: 99%

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Sky islands as foci for divergence of fig trees and their pollinators in southwest China

Deng

Compton

et al. 2020

Molecular Ecology

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The dynamics of populations and their divergence over time have shaped current levels of biodiversity and in the case of the “sky islands” of mountainous southwest (SW) China have resulted in an area of exceptional botanical diversity. Ficus tikoua is a prostrate fig tree subendemic to the area that displays unique intraspecific diversity, producing figs typical of different pollination modes in different parts of its range. By combining climate models, genetic variation in populations of the tree's obligate fig wasp pollinators and distributions of the different plant phenotypes, we examined how this unusual situation may have developed. We identified three genetically distinct groups of a single Ceratosolen pollinator species that have largely parapatric distributions. The complex topography of the region contributed to genetic divergence among the pollinators by facilitating geographical isolation and providing refugia. Migration along elevations in response to climate oscillations further enhanced genetic differentiation of the three pollinator groups. Their distributions loosely correspond to the distributions of the functionally significant morphological differences in the male figs of their host plants, but postglacial expansion of one group has not been matched by spread of its associated plant phenotype, possibly due to a major river barrier. The results highlight how interplay between the complex topography of the “sky island” complex and climate change has shaped intraspecies differentiation and relationships between the plant and its pollinator. Similar processes may explain the exceptional botanical diversity of SW China.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Sky islands as foci for divergence of fig trees and their pollinators in southwest China

Deng

Compton

et al. 2020

Molecular Ecology

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“…This was true for even very closely related species of the F. auriculata complex. While genetically distinct (Wei, Kobmoo, Cruaud, & Kjellberg, ), they are similar morphologically (Berg, ) and sometimes even share pollinators (Wang, Cannon Charles, & Chen, ; Yang, Li, Peng, & Yang, ). ANOSIM and PERMANOVA analyses showed that FEF assemblages of the four species in this complex differed from each other.…”

Section: Discussionmentioning

confidence: 99%

Host identity and phylogeny shape the foliar endophytic fungal assemblages of Ficus

Liu

Zhao

Wang

et al. 2019

Ecology and Evolution

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Foliar endophytic fungi (FEF) are diverse and ubiquitously associated with photosynthetic land plants. However, processes shaping FEF assemblages remain poorly understood. Previous studies have indicated that host identity and host habitat are contributing factors, but these factors are often difficult to disentangle. In this study, we studied FEF assemblages from plants grown in a botanical garden, enabling us to minimize the variation in abiotic environmental conditions and fungal dispersal capacity. FEF assemblages from 46 Ficus species were sequenced using next‐generation methods, and the results indicated that closely related host species had clearly differentiated FEF assemblages. Furthermore, host phylogenetic proximity was significantly correlated with the similarity of their FEF assemblages. In the canonical correspondence analysis, eleven leaf traits explained 32.9% of the total variation in FEF assemblages, whereas six traits (specific leaf area, leaf N content, leaf pH, toughness, latex alkaloid content, and latex volume per leaf area) were significant in the first two dimensions of ordination space. In the multiple regression on distance matrix analysis, 21.0% of the total variance in FEF assemblage was explained by both host phylogeny and leaf traits while phylogeny alone explained 7.9% of the variance. Thus, our findings suggest that both evolutionary and ecological processes are involved in shaping FEF assemblages.

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“…; Wang et al. ). In addition, while a signal of co‐cladogenesis is often the dominant pattern recovered between sections of figs and genera of fig wasps ( e.g ., Weiblen and Bush ; Rønsted et al.…”

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confidence: 98%

Inferring processes of coevolutionary diversification in a community of Panamanian strangler figs and associated pollinating wasps*

et al. 2019

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The fig and pollinator wasp obligate mutualism is diverse (∼750 described species), ecologically important, and ancient (∼80 Ma). Once thought to be an example of strict one‐to‐one cospeciation, current thinking suggests genera of pollinator wasps codiversify with corresponding sections of figs, but the degree to which cospeciation or other processes contribute to the association at finer scales is unclear. Here, we use genome‐wide sequence data from a community of Panamanian strangler figs and associated wasp pollinators to estimate the relative contributions of four evolutionary processes generating cophylogenetic patterns in this mutualism: cospeciation, host switching, pollinator speciation, and pollinator extinction. Using a model‐based approach adapted from the study of gene family evolution, our results demonstrate the importance of host switching of pollinator wasps at this fine phylogenetic and regional scale. Although we estimate a modest amount of cospeciation, simulations reveal the number of putative cospeciation events to be consistent with what would be expected by chance. Additionally, model selection tests identify host switching as a critical parameter for explaining cophylogenetic patterns in this system. Our study demonstrates a promising approach through which the history of evolutionary association between interacting lineages can be rigorously modeled and tested in a probabilistic phylogenetic framework.

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Pollinator sharing and gene flow among closely related sympatric dioecious fig taxa

Cited by 56 publications

References 51 publications

Sky islands as foci for divergence of fig trees and their pollinators in southwest China

Sky islands as foci for divergence of fig trees and their pollinators in southwest China

Host identity and phylogeny shape the foliar endophytic fungal assemblages of Ficus

Inferring processes of coevolutionary diversification in a community of Panamanian strangler figs and associated pollinating wasps*

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