Insights on long-term ecosystem changes from stable isotopes in historical squid beaks ...

• Main Authors: Golikov, Alexey V., Xavier, José C., Ceia, Filipe R., Queirós, José P., Bustamante, Paco, Couperus, Bram, Guillou, Gaël, Larionova, Anna M., Sabirov, Rushan M., Somes, Christopher J., Hoving, Henk-Jan
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: figshare 2024
• Subjects: Ecology; FOS Biological sciences; Climate change
• Online Access: https://dx.doi.org/10.6084/m9.figshare.c.7313290; https://springernature.figshare.com/collections/Insights_on_long-term_ecosystem_changes_from_stable_isotopes_in_historical_squid_beaks/7313290

Abstract Background Assessing the historical dynamics of key food web components is crucial to understand how climate change impacts the structure of Arctic marine ecosystems. Most retrospective stable isotopic studies to date assessed potential ecosystem shifts in the Arctic using vertebrate top predators and filter-feeding invertebrates as proxies. However, due to long life histories and specific ecologies, ecosystem shifts are not always detectable when using these taxa. Moreover, there are currently no retrospective stable isotopic studies on various other ecological and taxonomic groups of Arctic biota. To test whether climate-driven shifts in marine ecosystems are reflected in the ecology of short-living mesopredators, ontogenetic changes in stable isotope signatures in chitinous hard body structures were analysed in two abundant squids (Gonatus fabricii and Todarodes sagittatus) from the low latitude Arctic and adjacent waters, collected between 1844 and 2023. Results We detected a temporal increase ...