Non-native fishes homogenize native fish communities and reduce ecosystem multifunctionality in tropical lakes over 16 years
SCIENCE OF THE TOTAL ENVIRONMENT, cilt.769, 2021 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 769
- Basım Tarihi: 2021
- Doi Numarası: 10.1016/j.scitotenv.2020.144524
- Dergi Adı: SCIENCE OF THE TOTAL ENVIRONMENT
- Derginin Tarandığı İndeksler: 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
- Anahtar Kelimeler: Biodiversity, Decomposition, Ecosystem functioning, Exotic species, Productivity, Species invasion
- Orta Doğu Teknik Üniversitesi Adresli: Hayır
Özet
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.