Abstract
AbstractThe mayfly Baetis tricaudatus is an abundant, widespread, and ecologically important multivoltine benthic macroinvertebrate that is found throughout most of North America. Baetis tricaudatus belongs to the Baetis rhodani species group, which is known to have cryptic species. Some investigators have found that B. tricaudatus morphospecies have cytochrome oxidase I (COI) diversity >20%. However, no investigators have examined whether this diversity is structured temporally, with some haplotypes being more common in certain years or seasons than others. We sequenced COI from 371 B. rhodani specimens. The 371 rhodani species group sequences generated fell into 2 well-supported clades, one with 38 Baetis adonis specimens and another with 333 B. tricaudatus specimens, which were the focus of our study. We examined the temporal and spatial dynamics of genetic diversity in B. tricaudatus populations from northern California using COI haplotype networks. The maximum genetic diversity among B. tricaudatus s...
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