On the track of the Red Queen: bark beetles, their nematodes, local climate and geographic parthenogenesis

Meirmans, Stephanie; Skorping, Arne; Løyning, M. K.; Kirkendall, Lawrence R.

doi:10.1111/j.1420-9101.2006.01153.x

Cited by 17 publications

(20 citation statements)

References 30 publications

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“…Variable infection rates were also found by Yaman (2008) for Helicosporidium pathogen in D. micans. Similar judgment was suggested for closely related nematode species, with similar life cycles which usually have comparable effects in different bark beetle hosts (Rühm 1956;Meirmans et al 2006). Nematodes were found in 9.1-44.1 % of the samples in the investigated localities.…”

Section: Resultssupporting

confidence: 55%

Identification, distribution and occurrence of the ascomycete Metschnikowia typographi in the great spruce bark beetle, Dendroctonus micans

Yaman

Radek

2008

Folia Microbiol

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This is the first report on the ascomycete Metschnikowia typographi from the adults and larvae of the great spruce bark beetle Dendroctonus micans in Turkey. In total, 910 of 1928 adults and 44 of 149 larvae investigated during the two years were infected by the pathogen. In a fresh smear the asci of the pathogen measure 18.5 +/- 2.05 microm (14.7-22.3) in length and 2.1 +/- 0.4 microm in width (n = 35). The ascospores are about 2 microm shorter than asci, having an average length of 16.4 +/- 1.5 microm (14.2-18.0). The total infection rate of D. micans was 47.2 %. The prevalence of M. typographi infections differed between localities and years. Different infection rates of male and female beetles of D. micans were not recognized.

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Section: Resultssupporting

confidence: 55%

Identification, distribution and occurrence of the ascomycete Metschnikowia typographi in the great spruce bark beetle, Dendroctonus micans

Yaman

Radek

2008

Folia Microbiol

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“…Better support for this hypothesis could come from observing the same correlation between antagonists and host sex-asex variation in randomly selected populations, not in populations sampled along the north–south transect of geographic parthenogenesis (because of possible confounding effects of other factors that might cause geographic parthenogenesis). Population surveys in different species have previously explored a correlation between host sex-asex variation and antagonist prevalence, confirming RQ predictions in some systems [42,43,47] but not in others [44,45,48]. If we look at the populations only in the southern part of the dandelion transect, where sexuals and asexuals coexist, the association between infection rate and the proportion of asexuals also showed a negative trend across populations (β = −0.16 for the asexual-rust association, n = 10 population; β = −0.26 for the asexual-weevil association, n = 7 populations).…”

Section: Discussionmentioning

confidence: 61%

Geographic parthenogenesis and plant-enemy interactions in the common dandelion

Verhoeven

Biere

2013

BMC Evol Biol

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BackgroundMany species with sexual and asexual variants show a pattern of geographic parthenogenesis where asexuals have broader and higher-latitude distribution than sexuals. Because sexual reproduction is often considered a costly evolutionary strategy that is advantageous in the face of selection by coevolving pests and pathogens, one possible explanation for geographic parthenogenesis is that populations at higher latitudes are exposed to fewer pests and pathogens. We tested this hypothesis in the common dandelion (Taraxacum officinale), a species with well-established geographic parthenogenesis, by screening prevalence and effects of several specialized pests and pathogens in natural dandelion populations.ResultsWe did a population survey of 18 dandelion populations along a geographic transect that ranged from the area where sexual and asexual dandelions co-occur northward into the area where only asexuals occur. In addition we used four southern and four northern populations in a 8x8 cross-inoculation greenhouse experiment in which plants were exposed experimentally to each other’s natural field soil microbial communities. The cross-inoculation experiment indicated a higher pathogenicity of soil microbial communities from the southern, mostly sexual, populations compared to soil microbial communities from the northern asexual populations. Northern dandelion populations also showed reduced infestation by a specialized seed-eating weevil. A similar trend of reduced rust fungus infection in northern populations was observed but this trend was not statistically significant.ConclusionsThe prevalence of pests and pathogens decreased along the south-to-north axis of geographic parthenogenesis. This highlights the potential of biotic interactions in shaping patterns of geographic parthenogenesis.

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“…, ; Meirmans et al. ). For these reasons, the number of nematodes in the galleries' frass usually increases with bark beetles development.…”

Section: Discussionmentioning

confidence: 98%

Nematodes associated with the double‐spined bark beetleIps duplicatus(Coleoptera:Curculionidae) in centralEurope

Grucmanová

Holuša

Nermuť

2014

J Applied Entomology

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Ips duplicatus (Sahlberg) is an important forest pest in central Europe, but its nematode associates have seldom been studied. Therefore, nematodes associated with I. duplicatus were determined at three localities in the Czech Republic. The percentage of beetles with phoretic nematodes ranged from 18 to 65%. Micoletzkya buetschlii and other phoretic nematodes were found under elytra, on wings, and between body segments. The percentage of beetles with nematodes in the haemocoel ranged from 3 to 30%, and the nematodes included Contortylenchus diplogaster and Parasitylenchus cf. aculeatus. Juveniles of Parasitorhabditis obtusa (Fuchs 1915) were found in the intestines of 0-16% of the beetles. The most abundant species in I. duplicatus galleries were P. obtusa and M. buetschlii. Cryptaphelenchus sp., Parasitaphelenchus sp. and unidentified tylenchid juveniles also were found in the galleries. The percentage of beetles with nematodes was greater in the overwintering than in the offspring generation, and numbers of nematodes per gallery increased with gallery development.

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On the track of the Red Queen: bark beetles, their nematodes, local climate and geographic parthenogenesis

Cited by 17 publications

References 30 publications

Identification, distribution and occurrence of the ascomycete Metschnikowia typographi in the great spruce bark beetle, Dendroctonus micans

Identification, distribution and occurrence of the ascomycete Metschnikowia typographi in the great spruce bark beetle, Dendroctonus micans

Geographic parthenogenesis and plant-enemy interactions in the common dandelion

Nematodes associated with the double‐spined bark beetleIps duplicatus(Coleoptera:Curculionidae) in centralEurope

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