Biogeography and demography of an Australian native bee Ceratina australensis (Hymenoptera, Apidae) since the last glacial maximum

Dew, Rebecca M.; Rehan, Sandra M.; Schwarz, Michael P.

doi:10.3897/jhr.49.8066

Cited by 14 publications

(16 citation statements)

References 33 publications

(53 reference statements)

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“…Our detection of a significant decrease in genetic diversity in SA corroborates previously determined mitochondrial homogeneity for this population (Dew et al, 2016). Pairwise F ST values are often much higher when calculated using mitochondrial marker data compared with microsatellite data (Carlsson et al, 2004;Goropashnaya et al, 2007) owing to both the high variability of microsatellites and the lower effective population size of mtDNA (Jorde et al, 1998).…”

Section: Discussion Population Genetics and Marker Comparisonssupporting

confidence: 90%

“…A previous assessment of mitochondrial CO1 haplotype variation across the C. australensis range supported an ancestral dispersal out of Asia, coinciding with the last major glaciation event ~18 kya, followed by expansion south and west (Dew et al, 2016). The most southern population sampled during that study was represented by a single haplotype, which indicated either a recent genetic bottleneck or a founding event followed by little to no additional immigration.…”

Section: Introductionmentioning

confidence: 54%

“…Pairwise F ST values are often much higher when calculated using mitochondrial marker data compared with microsatellite data (Carlsson et al, 2004;Goropashnaya et al, 2007) owing to both the high variability of microsatellites and the lower effective population size of mtDNA (Jorde et al, 1998). It is thus not unexpected that the F ST values we determined through targeting microsatellite loci were lower than those secured using mtDNA (Dew et al, 2016; Table 2).…”

Section: Discussion Population Genetics and Marker Comparisonsmentioning

confidence: 75%

“…1). Our Queensland (QLD) population (28.24°S, 152.09°E) was drawn from subtropical temperate forests characterized by warm summers and cold winters; Victoria (VIC; 34.15°S, 142.16°E) from a semi-arid riverine area with hot, dry summers and cold winters; and our South Australia (SA) population (34.94°S, 138.50°E) from coastal dunes with warm summers and cold winters (Dew et al, 2016(Dew et al, , 2018. Victoria is a drier region of Australia than either QLD or SA, but is connected to both regions by a series of waterways which form the Murray-Darling River basin (MDRB; Fig.…”

Section: Field Collections and Demographic Assessmentsmentioning

confidence: 99%

“…Although speciose on most continents, the genus is represented by a single species, Ceratina australensis (Perkins), in Australia. This species inhabits a wide variety of climates across its range, including subtropical and temperate forests, persistently dry grasslands and temperate coastal dunes (Dew, Rehan & Schwarz, 2016). Ceratina australensis is largely subsocial; most nests contain a single female, which provides extended maternal care to her brood (Michener, 1974;Rehan, Richards & Schwarz, 2010).…”

Section: Introductionmentioning

confidence: 99%

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Phylogeography and population genetics of the Australian small carpenter bee, Ceratina australensis

Oppenheimer

Shell

Rehan

2018

Biological Journal of the Linnean Society

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The Australian small carpenter bee, Ceratina australensis, is the sole member of the small carpenter bees, genus Ceratina, in Australia. Ceratina australensis is found throughout eastern Australia in dead, broken stems of weedy plant species, where it makes its nests. Here we developed eight microsatellite loci and used these markers to characterize the genetic structure of three populations across three distinct ecoregions that are connected by the Murray-Darling River basin. We genotyped 57 female bees and found significant and geographically consistent variation in allelic diversity and heterozygosity between populations. Through comparisons with the results of mitochondrial DNA screening from a previous study, we infer the possibilities of male-biased dispersal and limited interpopulation migration. Based on available distribution data, the expansion of C. australensis into arid regions appears to follow the Murray-Darling River basin and associated waterways. This basin has undergone severe anthropogenic disturbance since European settlement of Australia, with large-scale changes to native vegetation communities. Although it is unknown how these changes have affected local insect communities, C. australensis does not rely on a single plant species for nesting habitat. We provide evidence for the hypothesis that expansion of C. australensis into Australia might have been aided by the introduction of non-native pithy stemmed plants.

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Section: Discussion Population Genetics and Marker Comparisonssupporting

confidence: 90%

Section: Introductionmentioning

confidence: 54%

Section: Discussion Population Genetics and Marker Comparisonsmentioning

confidence: 75%

Section: Field Collections and Demographic Assessmentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Phylogeography and population genetics of the Australian small carpenter bee, Ceratina australensis

Oppenheimer

Shell

Rehan

2018

Biological Journal of the Linnean Society

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Population genomics and phylogeography of Colletes gigas, a wild bee specialized on winter flowering plants

Zhao

et al. 2022

Ecology and Evolution

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Diet specialization may affect the population genetic structure of pollinators by reducing gene flow and driving genetic differentiation, especially in pollen‐specialist bees. Colletes gigas is a pollen‐specialist pollinator of Camellia oleifera , one of the most important staple oil crops in China. Ca . oleifera blooms in cold climates and contains special compounds that make it an unusable pollen source to other pollinators. Thus, C . gigas undoubtedly plays a key role as the main pollinator of Ca . oleifera , with biological and economic significance. Here, we use a population genomic approach to analyze the roles of geography and climate on the genetic structure, genetic diversity, and demographic history of C . gigas . A total of 1,035,407 SNPs were identified from a 582.77 Gb dataset. Clustering and phylogenetic analyses revealed a marked genetic structure, with individuals grouped into nine local clusters. A significant isolation by distance was detected by both the Mantel test ( R = .866, p = .008) and linear regression ( R 2 = .616, p < .001). Precipitation and sunshine duration were positively and significantly ( R ≥ .765, p ≤ .016) correlated with observed heterozygosity ( H o ) and expected heterozygosity ( H e ). These results showed that C . gigas populations had a distinct phylogeographic pattern determined by geographical distance and environmental factors (precipitation and sunshine duration). In addition, an analysis of paleogeographic dynamics indicated that C . gigas populations exhibited patterns of glacial expansion and interglacial contraction, likely resulting from post‐glacial habitat contraction and fragmentation. Our results indicated that the peculiar phylogeographic patterns in C . gigas populations may be related to their specialization under long‐term adaptation to host plants. This work improves our understanding of the population genetics in pollen‐specialist bees. The distinct genetic clusters identified in this study should be taken into consideration for the protection and utilization of this specialized crop pollinator.

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Wild Bee Pollen Usage and Microbial Communities Co-vary Across Landscapes

McFrederick

Rehan

2018

Microb Ecol

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Bees forage for pollen and nectar at flowers but simultaneously acquire pathogenic, commensal, and likely beneficial microbes from these same flowers. Characterizing pollen usage of wild bees is therefore crucial to their conservation yet remains a challenging task. To understand pollen usage across landscapes and how this affects microbial communities found in the pollen provisions collected from flowers, we studied the generalist small carpenter bee Ceratina australensis. We collected C. australensis nests from three different climatic zones across eastern and southern Australia. To characterize the plant, fungal, and bacterial composition of these pollen provisions, we used a metabarcoding and next-generation sequencing approach. We found that the species richness of plant types, fungi, and bacteria was highest in a subtropical zone compared to a temperate or a grassland zone. The composition of these communities also differentiated by zone, particularly in pollen composition and fungal communities. Moreover, pollen composition strongly correlated with fungal community composition, suggesting that variation in pollen usage across landscapes results in variation in microbial communities. While how these pollen usage and microbial community patterns affect bee health merits additional work, these data further our understanding of how flowering plant community composition affects not only the pollen usage of a generalist bee but also its associated microbial communities.

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Biogeography and demography of an Australian native bee Ceratina australensis (Hymenoptera, Apidae) since the last glacial maximum

Cited by 14 publications

References 33 publications

Phylogeography and population genetics of the Australian small carpenter bee, Ceratina australensis

Phylogeography and population genetics of the Australian small carpenter bee, Ceratina australensis

Population genomics and phylogeography of Colletes gigas, a wild bee specialized on winter flowering plants

Wild Bee Pollen Usage and Microbial Communities Co-vary Across Landscapes

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