Data from: Rapid climate change increases diversity and homogenizes composition of coastal fish at high latitudes

# Rapid climate change increases diversity and homogenizes composition of coastal fish at high latitudes [https://doi.org/10.5061/dryad.zs7h44jhf](https://doi.org/10.5061/dryad.zs7h44jhf) The dataset contains summary statistics of fish diversity and composition from demersal trawls along the Norwegian coast. Raw data comes from an annual scientific survey and was collected by the Norwegian Institute of Marine Research (IMR). The results are based on a selection of 59 fish taxa, and presented per year (1995-2019) and sub-section along the coast. The coast was divided into 10 equally long intervals of c. 167 km each. Please read the paper or contact the author for more details. ## Description of the data and file structure | **Column** | **Explanation** | | :----------- | :-------------------------------------------------------------------------------------------- | | year | Year of sampling | | coastint | Coastal interval, 167 km long segments along the coast, numbered from 1 (south) to 10 (north) | | S | Mean species richness, number of species per trawl haul | | J | Mean Pielou\`s eveness index per trawl haul | | H | Mean Shannon\`s diversity index per trawl haul | | totcount\_nm | Mean fish abundance per trawl haul, standardised to counts per nautical mile trawled | | ntrawls | Number of trawl hauls per year and coastal interval | | north\_perc | Percent of trawls assigned to the northern fish assemblage type |