van Kuijk T, Biesmeijer JC, van der Hoorn BB, Verdonschot, PFM. 2021. Functional traits explain crayfish invasive success in the Netherlands. Scientific Repprts 11: 2772. https://doi.org/10.1038/s41598-021-82302-4
Abstract
Biological invasions by nonindigenous species can have negative effects
on economies and ecosystems. To limit this impact, current research on
biological invasions uses functional traits to facilitate a mechanistic
understanding of theoretical and applied questions. Here we aimed to
assess the role of functional traits in the progression of crayfish
species through different stages of invasion and determine the traits
associated with invasive success. A dataset of thirteen functional
traits of 15 species currently occurring or available for sale in the
Netherlands was evaluated. Six of these crayfish appeared invasive.
Important traits distinguishing successful from unsuccessful invaders
were a temperate climate in the native range, a medium to high egg count
and producing more than one egg clutch per year. The most successful
invaders had different functional trait combinations: Procambarus clarkii has a higher reproductive output, can migrate over longer distances and possesses a higher aggression level; Faxonius limosus
is adapted to a colder climate, can reproduce parthenogetically and has
broader environmental tolerances. Using a suit of functional traits to
analyse invasive potential can help risk management and prevention. For
example, based on our data Procambarus virginalis is predicted to become the next successful invasive crayfish in the Netherlands.
Keywords: None provided.
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