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- Title
Contrasting invasion histories and effects of three non-native fishes observed with long-term monitoring data.
- Authors
Pintar, Matthew R.; Dorn, Nathan J.; Kline, Jeffrey L.; Trexler, Joel C.
- Abstract
Boom-bust population dynamics are long-recognized phenomena during species invasions, but few studies documented impacts of these dynamic changes. The Florida Everglades is the largest wetland in the United States, is undergoing a multi-decade hydro-restoration effort, and has been invaded by several tropical freshwater fishes. We used a 26-year dataset of small native marsh fishes and decapods to assess potential effects of African Jewelfish (Hemichromis letourneuxi) invasion and compared their effects to those of a more recently invading species, Asian Swamp Eels (Monopterus albus/javanensis), and a long-established non-native species, Mayan Cichlids (Mayaheros urophthalmus). Unlike boom-bust dynamics of jewelfish, swamp eel abundance increased and stabilized over the course of this study. After accounting for effects of hydrologic variation, the densities of several native species were more reduced by either jewelfish or swamp eels than by native fish predators, while effects of Mayan Cichlids were similar to those of native fish predators. Impacts of the jewelfish boom in Shark River Slough were smaller (density reductions ≤ 50%) and more temporally limited than those of swamp eels, which produced near-complete loss of four species in Taylor Slough. Following the jewelfish bust, the density of affected species approximated pre-invasion predictions based on hydrology, but their recovery is now threatened by the subsequent invasion of swamp eels in Shark River Slough. Long-term monitoring data provide opportunities to probe for population-level effects at field scales, and indicate that impacts of non-native species can be context-dependent and vary across ecosystems and temporal scales.
- Subjects
FLORIDA; NATIVE fishes; FRESHWATER fishes; INTRODUCED species; BIOLOGICAL extinction; WETLANDS; CICHLIDS; INDUCTIVE effect
- Publication
Biological Invasions, 2023, Vol 25, Issue 12, p3887
- ISSN
1387-3547
- Publication type
Article
- DOI
10.1007/s10530-023-03146-9