Chironomids regulate long‐chain polyunsaturated fatty acid levels independent of lake nutrient or dissolved organic carbon concentrations
Pilecky, M., Turunen, A., Sohrabi, M. S., Ghimire, S., Ilo, T., Kesti, P., Vitecek, S., Fehlinger, L., Akkanen, J., Taipale, S. J., Vainikka, A., Kahilainen, K. K., Kainz, M. J., & Strandberg, U. (2024). Chironomids regulate long‐chain polyunsaturated fatty acid levels independent of lake nutrient or dissolved organic carbon concentrations. Oikos, Early View. https://doi.org/10.1111/oik.10816
Julkaistu sarjassa
OikosTekijät
Päivämäärä
2024Tekijänoikeudet
© 2024 The Author(s). Oikos published by John Wiley & Sons Ltd on behalf of Nordic Society Oikos
Chironomids are keystone primary benthic consumers with semi-aquatic life cycles. They support aquatic and terrestrial consumers at higher trophic levels by conveying dietary nutrients, such as fatty acids. In this study, we combined field sampling and laboratory experiments to examine the effects of environmental parameters, including diet, on fatty acid composition and metabolism in chironomid larvae and imagines. Results from 53 lakes showed that lake size, depth, dissolved organic carbon (DOC) concentrations, and trophic state had only marginal effects on the content of long-chain polyunsaturated fatty acids (LC-PUFA) in chironomids. Compound-specific stable hydrogen isotope analyses confirmed that chironomids actively bioconvert dietary fatty acid precursors to LC-PUFA in all lake types, independent of nutrient or DOC concentrations. Moreover, fatty acid-specific stable carbon isotope data indicated that the diet of chironomids was subsidized, particularly in oligotrophic lakes in spring, by terrestrial C18 fatty acid precursors that were converted to LC-PUFA. Data from feeding experiments further confirmed that decreased dietary availability of LC-PUFA enhanced the conversion of dietary short-chain precursors to LC-PUFA. These results suggest that chironomids are PUFA regulators that can sustain LC-PUFA levels under varying environmental conditions. Furthermore, our results indicate that they bioconvert terrestrial low-quality material to high-quality resources, which, via chironomid emergence, support terrestrial food webs. Chironomids are abundant and widespread, and thus, the trophic transfer of LC-PUFA can have significant implications for the fitness and production of upper trophic level consumers in both aquatic and terrestrial ecosystems.
...
Julkaisija
Wiley-BlackwellISSN Hae Julkaisufoorumista
0030-1299Asiasanat
Julkaisu tutkimustietojärjestelmässä
https://converis.jyu.fi/converis/portal/detail/Publication/241747151
Metadata
Näytä kaikki kuvailutiedotKokoelmat
Lisätietoja rahoituksesta
This work has been supported by the Austrian Science Fund (FWF; I-3855 project ‘AquaTerr’ to MJK) and the Research Council of Finland (grants no. 338261 and no. 346541 to US). MP received financial support from UEF Water research to conduct the laboratory and field studies at the University of Eastern Finland.Lisenssi
Samankaltainen aineisto
Näytetään aineistoja, joilla on samankaltainen nimeke tai asiasanat.
-
Protocols for sample preparation and compound-specific stable-isotope analyses (δ2H, δ13C) of fatty acids in biological and environmental samples
Pilecky, Matthias; Wassenaar, Leonard I.; Taipale, Sami; Kainz, Martin J. (Elsevier BV, 2023)Compound-specific stable-isotope analysis (CSIA) of fatty acids is a powerful tool to better understand the trophic transfer of fatty acids and their biochemical fate in and across ecosystems, including tracing animal ... -
Tracing the fate of microplastic carbon in the aquatic food web by compound-specific isotope analysis
Taipale, S.J.; Peltomaa, E.; Kukkonen, J.V.K.; Kainz, M. J.; Kautonen, P.; Tiirola, M. (Nature Publishing Group, 2019)Increasing abundance of microplastics (MP) in marine and freshwaters is currently one of the greatest environmental concerns. Since plastics are fairly resistant to chemical decomposition, breakdown and reutilization of ... -
Sterol limitation of Daphnia on eukaryotic phytoplankton : a combined supplementation and compound‐specific stable isotope labeling approach
Laine, Miikka Benjami; Martin‐Creuzburg, Dominik; Litmanen, Jaakko J.; Taipale, Sami J. (Wiley-Blackwell, 2024)Essential biomolecules can critically influence the performance of consumers. A deficiency in dietary sterols has been shown to constrain the food quality of prokaryotic food sources for aquatic consumers. Here, we assessed ... -
Periphyton as a key diet source of essential fatty acids for macroinvertebrates across a nutrient and dissolved organic carbon gradient in boreal lakes
Vesterinen, Jussi; Strandberg, Ursula; Taipale, Sami J.; Kainz, Martin J.; Kankaala, Paula (Wiley; Association for the Sciences of Limnology and Oceanography, 2022)We studied how physiologically important long-chain polyunsaturated fatty acids (PUFA) in benthic macroinvertebrates (Asellus aquaticus, Chironomidae, and Oligochaeta) were related to those in periphyton and terrestrial ... -
Atlantic cod individual spatial behaviour and stable isotope associations in a no‐take marine reserve
Monk, Christopher T.; Power, Michael; Freitas, Carla; Harrison, Philip M.; Heupel, Michelle; Kuparinen, Anna; Moland, Even; Simpfendorfer, Colin; Villegas‐Ríos, David; Olsen, Esben M. (Wiley, 2023)1. Foraging is a behavioural process and, therefore, individual behaviour and diet are theorized to covary. However, few comparisons of individual behaviour type and diet exist in the wild. 2. We tested whether behaviour ...
Ellei toisin mainittu, julkisesti saatavilla olevia JYX-metatietoja (poislukien tiivistelmät) saa vapaasti uudelleenkäyttää CC0-lisenssillä.