20.500.12556/DiRROS-20248 Chemical composition and egg production capacity throughout bloom development of ctenophore Mnemiopsis leidyi in the northern Adriatic Sea High abundances of gelatinous zooplankton (GZ) can significantly impact marine ecosystem by acting as both sink and source of organic matter (OM) and nutrients. The decay of GZ bloom can introduce significant amount of OM to the ocean interior, with its variability influenced by GZ life traits and environmental factors, impacting microbial communities vital to marine biogeochemical cycles. The invasive ctenophores Mnemiopsis leidyi has formed massive blooms in the northern Adriatic Sea since 2016. However, the variability in the chemical composition and egg production of blooming populations, as well as the role of environmental factors in governing this variability, remains largely unknown. Our analysis of biometry, chemical composition, and fecundity of M. leidyi sampled in the Gulf of Trieste in 2021 revealed stable carbon and nitrogen content throughout bloom development, with no significant correlation with seawater temperature, salinity, oxygen, and chlorophyll a concentration. Although the studied population exhibited homogeneity in terms of biometry and chemical composition, the number of produced eggs varied substantially, showing no clear correlation with environmental variables and being somewhat lower than previously reported for the study area and other Mediterranean areas. We observed a positive correlation between the wet weight of individuals and the percentage of hatched eggs, as well as a significant positive correlation between the percentage of hatched eggs and ambient seawater temperature. Additionally, we noted that the speed of hatching decreased with decreasing seawater temperature in autumn, corresponding to the end of M. leidyi bloom. ctenophore biogeochemistry egg production capacity invasive species chemical composition marine ecology rebrače kemijska sestava rebrač reprodukcija rebrač true false true Angleški jezik Slovenski jezik Neznano 2024-08-29 16:52:33 2024-08-29 16:52:33 2024-08-31 03:36:28 0000-00-00 00:00:00 2024 0 0 Nasl. z nasl. zaslona; Soavtorji: Katja Klun, Lovrenc Lipej, Alenka Malej and Tinkara Tinta; Opis vira z dne 23. 8. 2024; str. 1-15 [article no.] e17844 Vol. 12 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2024-08-06 574.5 2167-8359 10.7717/peerj.17844 205091587 https://peerj.com/articles/17844/# 1 99f79992-6605-11ef-b487-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=28373 RAZ_Recnik_Kevin_2024.pdf RAZ_Recnik_Kevin_2024.pdf 1 9CF3D65EDA74EB4ED2C219AAF9EDC319 08f505b42d9a2bdd5d6f9899a5e0c3e9d7dd0f901a6cf129831ce1002f39404e 52b387f8-6606-11ef-b487-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=28374 Nacionalni inštitut za biologijo 0 0 0