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- W4280492968 abstract "Ecosystems are simultaneously regulated by bottom-up (resources) and top-down forces (predators). However, because predator-prey interactions operate on spatial scales beyond the reach of manipulative experimentation, the actual roles of predators remain poorly understood. In ecosystems where predators are naturally absent, biological invasions provide a unique experiment to shed light on the large-scale and long-term effects of predators in the recipient ecosystem. We combined data from long-term benthic monitoring, environmental conditions, and a census of round goby population to identify changes in the dominant benthic bivalve population ( Mytilus trossulus and Macoma balthica ) following round goby ( Neogobius melanostomus ) invasion. This study demonstrates a substantial change in the food web, with earlier primarily bottom-up regulated communities facing strong top-down control effects. The introduction of a novel predator to a species-poor ecosystem substantially reduced dominant invertebrate populations in a large part of the study area, sometimes with a time lag of 1−3 years. In general, the effects were less in high productivity areas. In some cases, community recovery was observed but rarely to pre-invasion levels, raising the question of the ability of bivalve communities to act as a natural filter. This study demonstrates long-term trends in benthic communities and by excluding possible effects due to the changing environment provides more evidence that invasive species transform coastal ecosystems over time and space." @default.
- W4280492968 created "2022-05-22" @default.
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- W4280492968 date "2022-05-12" @default.
- W4280492968 modified "2023-09-26" @default.
- W4280492968 title "Novel Fish Predator Causes Sustained Changes in Its Prey Populations" @default.
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- W4280492968 doi "https://doi.org/10.3389/fmars.2022.849878" @default.
- W4280492968 hasPublicationYear "2022" @default.
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