Invasive Aquatic Species Ecology and Impacts
Summary
Invasive aquatic species, introduced deliberately or accidentally beyond their native ranges, alter ecosystem structure and function through multiple pathways. These organisms often establish via high propagule pressure and exploit vacant or degraded niches, outcompeting native fauna and flora for resources. Key ecological processes include competitive displacement, predation, hybridization and the transmission of novel pathogens. At the ecosystem level, invasions modify trophic interactions, nutrient cycling and habitat architecture, with cascading effects on water quality, fisheries and conservation targets. Climatic shifts and global trade exacerbate the risk of new introductions, while warming temperatures can increase the physiological tolerance and reproductive success of warm-adapted invaders. Effective management requires integrated approaches spanning early detection, rapid response, eradication or containment, and long-term monitoring. Restoration of native communities often relies on habitat rehabilitation and targeted removal techniques, yet eradication in complex freshwater networks remains challenging. Understanding the ecological and evolutionary drivers of invasion success is critical for predicting hotspots of vulnerability and for designing biosecurity measures that safeguard biodiversity and the ecosystem services upon which human societies depend.
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Invasive Aquatic Species Ecology and Impacts publication trend
The graph below shows the total number of articles in invasive aquatic species ecology and impacts across all publications each year (not limited to Nature Index journals).
Technical terms
Propagule pressure: The frequency and number of individuals of a species introduced to a new area.
Ecological niche: The range of environmental conditions and resources that allow a species to survive and reproduce.
Species distribution model: A computational tool that predicts a species’ potential geographic range based on environmental variables.
Niche shift: A change in the environmental conditions occupied by a species, often observed when a species invades a new region.
Density dependence: Regulation of population growth rates by intraspecific competition as population density changes.
References
- Off to new shores: Climate niche expansion in invasive mosquitofish (Gambusia spp.). Ecology and Evolution (2021).
- Comparative gut content analysis of invasive mosquitofish from Italy and Spain. Ecology and Evolution (2021).
- Shifts in amphibian population dynamics in response to a change in the predator community. Ecosphere (2021).
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