Publications by authors named "Isaac J Stewart"
Article Synopsis
- Recent advancements in sequencing technology have sparked renewed interest in understanding insect phylogeny by generating extensive genomic and transcriptomic data rapidly.
- Accurate phylogenetic reconstruction depends not just on the number of genetic markers but also on the choice of sequence evolution models and sufficient taxonomic sampling.
- A new study sequenced the transcriptomes of seven insect species and confirmed that Strepsiptera is a sister group to Coleoptera, using robust models to avoid previous pitfalls in phylogenetic analysis.
The increasing evidence for population declines in bumble bee (Bombus) species worldwide has accelerated research efforts to explain losses in these important pollinators. In North America, a number of once widespread Bombus species have suffered serious reductions in range and abundance, although other species remain healthy. To examine whether declining and stable species exhibit different levels of genetic diversity or population fragmentation, we used microsatellite markers to genotype populations sampled across the geographic distributions of two declining (Bombus occidentalis and Bombus pensylvanicus) and four stable (Bombus bifarius; Bombus vosnesenskii; Bombus impatiens and Bombus bimaculatus) Bombus species.
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