| Summary: | This dataset contains Calanus hyperboreus abundance data compiled for the study Kvile KØ, Ashjian C, Feng Z, Zhang J, Ji R. 2018. Pushing the limit: Resilience of an Arctic copepod to environmental fluctuations. Global Change Biology, https://doi.org/10.1111/gcb.14419. The file named 'chyp_abun_orig.xlsx' contains Calanus hyperboreus abundance data compiled between January and April 2017 from various published sources. See 'chyp_data_sources.xlsx' for a full overview of the data sources. The dataset includes stage-specific abundance data for C. hyperboreus copepodid stages (C1-C5) and adults (C6 male or female) given as ind. m-3 or ind. m-2. Data of merged stages (e.g. C1-C3) or of other units (biomass, presence/absence etc.) were not included. Data missing information about sampling date, location (longitude, latitude), depth (upper and lower depth of sample), gear or mesh size were not included. If only lower sampling depth was given for subsequent stations, we assumed upper sampling depth was at the surface. Obvious errors (e.g. unrealistic sampling positions) were corrected if there was a clear data entry error, otherwise, the entry was removed. Some data are depth-integrated (surface-bottom), while other are for specific depth layers with multiple layers per station. The data span from 1934 to 2016 and cover the entire Arctic Ocean and surrounding subarctic seas. The following variables are included: #1: Sampling year #2: Sampling month #3: Sampling day (day of month) #4: Sampling time (0-24, often not given) #5: Decimal latitude #6: Decimal longitude (negative values for western hemisphere) #7: Upper sampling depth (m, top depth of sampled interval) #8: Lower sampling depth (m, bottom depth of sampled interval) #9: Sampling mesh (μm) #10: Sampling gear #11: Dataset (see chyp_data_sources.xlsx) #12: Dataset ID (see chyp_data_sources.xlsx) #13-19: C.hyperboreus concentrations (ind./m3) per copepodid stage C1-C5 and adult females and males (C6f/m) #20-27: C.hyperboreus abundances (ind./m2) per copepodid stage C1-C5 and adult females and males (C6f/m)
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