Publications by authors named "Jesse Jorna"

Article Synopsis
  • The study investigates how both current environmental factors and historic climatic events have shaped microbial communities in the McMurdo Dry Valleys, a cold desert ecosystem.
  • It focuses on comparing soil samples from areas that experienced disturbances during the Last Glacial Maximum to those in refugia that likely remained stable over time.
  • Findings indicate that microbial communities in higher elevation refugia show significant similarity, influenced more by elevation and geographic proximity than by soil chemistry, implying that historical climate impacts persist in altering ecosystem structures.
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Species delimitation among closely related species is challenging because traditional phenotype-based approaches, for example, using morphology, ecological, or chemical characteristics, may not coincide with natural groupings. With the advent of high-throughput sequencing, it has become increasingly cost-effective to acquire genome-scale data which can resolve previously ambiguous species boundaries. As the availability of genome-scale data has increased, numerous species delimitation analyses, such as BPP and SNAPP+Bayes factor delimitation (BFD*), have been developed to delimit species boundaries.

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Climatic impacts are especially pronounced in the Arctic, which as a region is warming twice as fast as the rest of the globe. Here, we investigate how mean climatic conditions and rates of climatic change impact parasitoid insect communities in 16 localities across the Arctic. We focus on parasitoids in a widespread habitat, Dryas heathlands, and describe parasitoid community composition in terms of larval host use (i.

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