High resolution image documentation of Greenlandic arthropod species

Temperatures in the Arctic currently rise at four times the global average, making it of utmost importance to understand the thermal biology of species in these sensitive environments. For arctic ectotherms in particular, thermal tolerance limits and adaptive potential are mostly unknown. Such knowledge is urgently needed to predict climate change impacts on future distributions of biodiversity in these rapidly changing environments. Here, we provide new data on upper and lower thermal limits of 93 Greenlandic species of insects, arachnids, and collembolans identified using barcode sequencing representing ~8% of terrestrial Greenlandic arthropod species. We found pronounced differences in heat and cold tolerance among species and a strong phylogenetic signal for both heat tolerance and thermal scope (difference between upper and lower thermal limits), suggesting that terrestrial Greenlandic arthropods are evolutionarily constrained in their capacity to cope with increasing and more vari..., , , # Narsarsuaq Arthropod fauna images Summer 2023

[https://doi.org/10.5061/dryad.1g1jwsv6w](https://doi.org/10.5061/dryad.1g1jwsv6w)

## Description of the data and file structure

Arthropods (insects, arachnids and collembola) were collected in Narsarsuaq, Southern Greenland (61.160°N, 45.424°W). All individuals were caught in a 200 x 200 m area less than 100 m from the laboratory facilities. Animals were collected in the summer season from the 12th of August until the 17th of August 2023. All animals were collected during the day between 09:00 and 19:00, and all days of the study period showed similar temperature profiles. A subset of the collected arthropods was chosen based on visual novelty and transferred to individual 5 mL glass vials with plastic screw-lids within 30 minutes after being collected. The vials with arthropods were kept outside of the laboratory in the shade for a duration no longer than 1 hour before being tested for either heat or cold tolerance. Animals were colle...,