Hasnain Sarah S, Arnott Shelley E
Department of Integrated Sciences and Mathematics, Habib University, Karachi, Sindh, Pakistan.
Biology Department, Queen's University, Kingston, Ontario, Canada.
PeerJ. 2024 Dec 12;12:e18608. doi: 10.7717/peerj.18608. eCollection 2024.
Trait variation in predator populations can influence the outcome of predator-prey dynamics, with consequences for trophic dynamics and ecosystem functioning. However, the influence of prey trait variation on the impacts of predators is not well understood, especially for introduced predators where variation in prey can shape invasion outcomes. In this study, we investigated if intra-specific differences in vertical position of influenced the impacts of the invasive zooplankton predator, on plankton communities. Our results show that vertical position of influenced predation on smaller cladoceran species and impacts on primary production. Larger reductions in small cladoceran density and greater algal biomass were observed in mesocosms with less spatial overlap between and . These results suggest that differences in vertical position of can alter the type and magnitude of impacts in invaded systems.
捕食者种群的性状变异会影响捕食者 - 猎物动态的结果，进而对营养动态和生态系统功能产生影响。然而，猎物性状变异对捕食者影响的作用尚未得到充分理解，特别是对于外来捕食者而言，猎物的变异可能会塑造入侵结果。在本研究中，我们调查了[具体物种]垂直位置的种内差异是否会影响入侵浮游动物捕食者[具体物种]对浮游生物群落的影响。我们的结果表明，[具体物种]的垂直位置影响了其对较小枝角类物种的捕食以及对初级生产的影响。在[具体物种]与[另一物种]空间重叠较少的中型生态缸中，观察到小型枝角类密度的更大降幅和更大的藻类生物量。这些结果表明，[具体物种]垂直位置的差异可以改变其在入侵系统中的影响类型和程度。
