Non-native fishes homogenize native fish communities and reduce ecosystem multifunctionality in tropical lakes over 16 years

Moi D. A., Alves D. C., Souza Figueiredo B. R., Poleto Antiqueira P. A., de Mello F. T., Jeppesen E., ...More

SCIENCE OF THE TOTAL ENVIRONMENT, vol.769, 2021 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 769
  • Publication Date: 2021
  • Doi Number: 10.1016/j.scitotenv.2020.144524
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Analytical Abstracts, Aqualine, Aquatic Science & Fisheries Abstracts (ASFA), BIOSIS, Biotechnology Research Abstracts, CAB Abstracts, Chemical Abstracts Core, Chimica, Communication Abstracts, Compendex, EMBASE, Environment Index, Food Science & Technology Abstracts, Geobase, Greenfile, MEDLINE, Metadex, Pollution Abstracts, Public Affairs Index, Veterinary Science Database, Civil Engineering Abstracts
  • Keywords: Biodiversity, Decomposition, Ecosystem functioning, Exotic species, Productivity, Species invasion
  • Middle East Technical University Affiliated: No


Non-native species are considered a major global threat to biodiversity, and their expansion to new ecosystems has recently increased. However, the effect of non-native species on ecosystem functioning is poorly understood, especially in hyperdiverse tropical ecosystems of which long-term studies are scarce. We analyzed the relationship between richness, biomass, and beta-diversity of non-native and native fishes during 16 years in five hyperdiverse tropical shallow lakes. We further elucidated how an observed increase in the proportion of richness, biomass, and beta-diversity of non-native over native fishes affect crucial multifunctional processes of lakes (decomposition, productivity). We found a general positive relationship between the richness and biomass of non-native and native fishes. However, the slope of this relationship decreased continuously with time, displaying an increase in non-native species richness and a decrease in native species richness over time. We also detected a negative relationship between the beta-diversity of non-native and native fishes over time. Moreover, the increase in the non-native:native ratio of species richness, biomass, and IS-diversity over time decreased ecosystem multifunctionality. Our results suggest that non-native fishes caused a homogenization of the native fish species over time, resulting in impoverishment of ecosystem multifunctionality; in part because nonnative fishes are less productive than native ones. Therefore, focus on long-term effects and use of multiple biodiversity facets (alpha- and beta-diversity) are crucial to make reliable predictions of the effects of non-native fish species on native fishes and ecosystem functioning. (C) 2021 Elsevier B.V. All rights reserved.