DOI: 10.5061/dryad.8w9ghx3sb
title: Analysing spatio-temporal patterns of non-native fish in a biodiversity hotspot across decades

description: Aim: Analysing the spatio-temporal patterns and dynamics of non-native
 species is essential to understanding the mechanisms underlying successful
 invasions and developing effective management strategies. Yet, such
 analyses generally neglect the influence of receiving ecosystem types and
 non-native species sources (i.e. alien species, non-natives originating
 outside the concerned region; translocated species, nonnatives introduced
 to locations outside their historical range within the concerned
 region).  Location: Yunnan, China. Methods: We analysed long-term
 (1950–2022) spatio-temporal patterns and potential underlying dynamics of
 non-native fishes in a biodiversity hotspot (Yunnan, China), paying
 special attention to waterbody types receiving non-native species and
 comparing alien and translocated species. We did this through compiling a
 highly comprehensive occurrence dataset of native and non-native fishes.
 Results: We recorded 783 native species and 94 non-native species (49
 alien species and 45 translocated species), which mainly belonged to the
 order Cypriniformes (52 species) and were introduced via purposes for
 advancing aquaculture. Most frequently encountered non-native species were
 either intentionally introduced aquaculture species or small-bodied fish
 unintentionally introduced via aquaculture activities. The richness and
 spatial ranges of non-native fishes increased consistently since the 1950s
 and demonstrated a pronounced change after the 2000s, with densely
 populated areas and the middle to lower reaches of large rivers being more
 profoundly affected. The number of records of translocated species
 exceeded the number of records of alien species after the 2000s. Lakes and
 reservoirs are hotspots for both alien and translocated species
 introductions, and watersheds with large areas in Yunnan (e.g. the
 Jinsha-Yangtze and Lancang-Mekong basins) contained more non-native fish.
 Main Conclusions: Our study highlights the need to consider invasion
 sensitivities of receiving ecosystems and pay special attention to
 intra-regional species translocations when developing prevention and
 management strategies against invasions of alien species, particularly in
 important biodiversity hotspots around the world.
description: # Analysing spatio-temporal patterns of non-native fish in a biodiversity
 hotspot across decades The spreadsheet compilations (yunnan--fish.xlsx)
 include a list of the underlying data used in this paper: "Analysing
 spatio-temporal patterns of non-native fish in a biodiversity hotspot
 across decades". ## Description of the data and file structure Data
 includes worksheet: "References", worksheet:
 "Occurrences", worksheet: "Clarification". In
 "References", this table provides all the reference sources used
 in this dataset, which are available in both Chinese and English sources.
 In "Occurrences", here we provide detailed occurrence
 information for 829 Yunnan fish species, of which the detailed coordinates
 of endangered species have been converted with the aim of studying them
 while and promoting their better conservation. Species Endangered class
 are derived from Chen et al., 2023 ("Assessing the conservation
 status of Chinese freshwater fish using deep learning"). In
 "Clarification", here we explain what each column name
 represents of the table "Occurrences". The details are as
 follows: * Scientific\_name: Scientific name after Eschmeyer's
 Catalogue of Fishes and FishBase proofreading; * Family: Family after
 Eschmeyer's Catalogue of Fishes and FishBase proofreading; * Order:
 Order after Eschmeyer's Catalogue of Fishes and FishBase
 proofreading; * Endangered\_class: Predicted Endangered class of Chinese
 freshwater fishes from Chen et al., 2023. NE, Not Evaluated. NTH, not
 threatened. PTH, possibly threatened. NA, non-native fishes. We also
 generalized accordingly the latitude and longitude coordinates of the PTH
 fishes; * Longitude: Fish occurrence sites; * Latitude: Fish occurrence
 sites; * Sampling\_site: Not completely accurate location information; *
 Sampling\_watersheds: Watersheds in which the sampling site is located; *
 Sampling\_year: Sampling year or period; * Species\_status (source):
 Species status (source) including native, alien and translocated; *
 Data\_source: Data sources include references (i.e., table
 "References") and sampling.