Reproductive disorders and contaminant exposure drive isotopic variability in Monoporeia affinis скачать в хорошем качестве

Reproductive disorders and contaminant exposure drive isotopic variability in Monoporeia affinis

Research presentation from Stockholm University Baltic Sea Day, October 7, 2021. Gastón Alurralde, Department of Environmental Science: 'Reproductive disorders and contaminant exposure drive isotopic variability in Monoporeia affinis'. Stable isotope (SI) signatures for carbon (δ13C) and nitrogen (δ15N) are commonly used in trophic ecology, including dietary niche analysis. However, one of the main assumptions involved in the data interpretation is that the physiological condition of the animals has a relatively low effect on the fractionation values. Here, we assessed the variability of SI signatures and the associated Layman niche metrics of the sentinel amphipod Monoporeia affinis collected in uncontaminated (Askö) and contaminated (Bråviken) sites in a coastal Baltic Sea area. Moreover, the health status was assayed in the gravid M. affinis females using embryo aberration analysis, classifying the females as healthy or unhealthy based on the frequency of their embryo malformations.