Density-dependent behavioural interactions influence coexistence between a native and a non-native mesopredator
| Autor: | Eglė Jakubavičiūtė, Ulrika Candolin |
|---|---|
| Přispěvatelé: | Organismal and Evolutionary Biology Research Programme, Biosciences, Behavioural Ecology - Candolin Research Lab |
| Rok vydání: | 2021 |
| Předmět: |
IMPACTS
0106 biological sciences animal structures Population Density dependence DETERMINANTS Gasterosteus Palaemon elegans 010603 evolutionary biology 01 natural sciences 03 medical and health sciences Mesopredator release hypothesis Invasion INVASION SUCCESS Foraging 14. Life underwater education Ecology Evolution Behavior and Systematics Nonindigenous species 030304 developmental biology 0303 health sciences education.field_of_study Ecology biology fungi STICKLEBACK GASTEROSTEUS-ACULEATUS Stickleback PALAEMON-ELEGANS FRAMEWORK biology.organism_classification Shrimp Aggression Habitat use Habitat 1181 Ecology evolutionary biology POPULATIONS DECAPODA PRAWNS |
| Zdroj: | Biological Invasions. 23:3427-3434 |
| ISSN: | 1573-1464 1387-3547 |
| DOI: | 10.1007/s10530-021-02585-6 |
| Popis: | The invasion of non-native species into an ecosystem can markedly alter the structure and functioning of the system. Yet, we have limited knowledge of the factors that determine invasion success. Behavioural interactions have been suggested as critical determinants of invasion success in animals, but the exact mechanisms are less well known. We investigated if density-dependent behavioural interactions could have facilitated the invasion of the shrimp Palaemon elegans into the spawning habitat of the threespine stickleback Gasterosteus aculeatus in the Baltic Sea. This was done by manipulating the densities of the two species in mesocosms. We found the stickleback to dominate behaviourally over the shrimp through higher aggression, but that the impact on the shrimp was density-dependent; a high density of sticklebacks increased aggressive interactions, which caused the shrimps to decrease their activity and restrict their habitat use to dense vegetation, while a low density of sticklebacks had no impact on the distribution and activity of the shrimps. The density of the shrimps had no impact on stickleback behaviour. These results suggest that the present density of the stickleback has allowed the invasion of the shrimp into the habitat. However, a current increase in stickleback abundance caused by human-induced ecological disturbances could limit the further expansion of the shrimp. Thus, our results indicate that a behavioural mechanism–density-dependent aggression–can influence invasion success and subsequent population expansion. At a broader level, our results stress the importance of considering density-dependent behavioural interactions when investigating the mechanisms behind invasion success. |
| Databáze: | OpenAIRE |
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