Long-term changes in taxonomic and functional composition of European marine fish communities

Evidence of large-scale biodiversity degradation in marine ecosystems has been reported worldwide, yet most research has focused on few species of interest or on limited spatiotemporal scales. Here we assessed the spatial and temporal changes in the taxonomic and functional composition of fish communities in European seas over the last 25 years (1994-2019). We then explored how these community changes were linked to environmental gradients and fishing pressure. We show that the spatial variation in fish species composition is more than two times higher than the temporal variation, with a marked spatial continuum in taxonomic composition and a more homogenous pattern in functional composition. The regions warming the fastest are experiencing an increasing dominance and total abundance of r-strategy fish species (lower age of maturity). Conversely, regions warming more slowly show an increasing dominance and total abundance of K-strategy species (high trophic level and late reproduction)...., , , # Long-term changes in taxonomic and functional composition of European marine fish communities

The GitHub linked repository is here: [European_demersal_fish_assemblages (](https://github.com/auroreRECE/European_demersal_fish_assemblages)DOI [10.5281/zenodo.11190119](https://zenodo.org/doi/10.5281/zenodo.11190119))

## Overview

This project is dedicated to studying the influence of environmental conditions and fishing on the functional and taxonomic structure of a demersal fish community in Europe. This GitHub repository provides the code of the Receveur et al. (2024) publication in Ecography.

## Data files description

### df\_MFA.csv

This file contains the coordinates resulting from the Multiple Factor Analysis (MFA):

* X : the row numbers ;
* ID_unique : a unique ID number corresponding to the trawls ;
* Dim.1 : the coordinate of each trawl on the first MFA dimension ;
* Dim.2 : the coordinate of each trawl on the second MFA dimension ;
* Dim.3 : the coordinate of each...