Food fight: Gammarus tigrinus demonstrate competitive advantage over native G. duebeni DOI Creative Commons
James W. E. Dickey, Julian W. Zeller, Elizabeta Briski

и другие.

NeoBiota, Год журнала: 2025, Номер 97, С. 301 - 318

Опубликована: Фев. 28, 2025

Introductions of non-native species (NNS) are major drivers biodiversity loss. Gammarids (Crustacea, Gammaroidea) have been particularly successful in establishing and spreading their range, especially Europe. While impacts wide-ranging, interference competition with native has received limited study to date. Here, we assessed the competitive abilities North American NNS Gammarus tigrinus relative European duebeni , over a chironomid larva as single food resource. We staged four types dyadic contest encounters, individuals or added experimental arena containing resource, inter- intraspecific competitor upon first individual taking possession after 20 minutes. were more likely take hold bloodworm opening minutes, did so quickly than G. . During this period, they also less thigmotactic native, being explorative spending smaller proportion time outer zone arena. They exhibited aggressive interactions activity increasing size mass, whereas larger shown be active. found significantly lose conspecifics, similarly conspecifics. Overall, our findings indicate that behaviour ability demonstrated here add list traits facilitate its invasion success. In addition, method offers potential an effective, standardisable means assessing gammarid NNS. encourage future studies develop it further, incorporating alternative resources, such habitat, assess role ecologically relevant abiotic stressors determining outcomes.

Язык: Английский

Food fight: Gammarus tigrinus demonstrate competitive advantage over native G. duebeni DOI Creative Commons
James W. E. Dickey, Julian W. Zeller, Elizabeta Briski

и другие.

NeoBiota, Год журнала: 2025, Номер 97, С. 301 - 318

Опубликована: Фев. 28, 2025

Introductions of non-native species (NNS) are major drivers biodiversity loss. Gammarids (Crustacea, Gammaroidea) have been particularly successful in establishing and spreading their range, especially Europe. While impacts wide-ranging, interference competition with native has received limited study to date. Here, we assessed the competitive abilities North American NNS Gammarus tigrinus relative European duebeni , over a chironomid larva as single food resource. We staged four types dyadic contest encounters, individuals or added experimental arena containing resource, inter- intraspecific competitor upon first individual taking possession after 20 minutes. were more likely take hold bloodworm opening minutes, did so quickly than G. . During this period, they also less thigmotactic native, being explorative spending smaller proportion time outer zone arena. They exhibited aggressive interactions activity increasing size mass, whereas larger shown be active. found significantly lose conspecifics, similarly conspecifics. Overall, our findings indicate that behaviour ability demonstrated here add list traits facilitate its invasion success. In addition, method offers potential an effective, standardisable means assessing gammarid NNS. encourage future studies develop it further, incorporating alternative resources, such habitat, assess role ecologically relevant abiotic stressors determining outcomes.

Язык: Английский

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