A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Eutrophication and browning influence Daphnia nutritional ecology (2019)
Taipale, S. J., Aalto, S. L., Galloway, A. W. E., Kuoppamäki, K., Nzobeuh, P., & Peltomaa, E. (2019). Eutrophication and browning influence Daphnia nutritional ecology. Inland Waters, 9(3), 374-394. https://doi.org/10.1080/20442041.2019.1574177
JYU-tekijät tai -toimittajat
Julkaisun tiedot
Julkaisun kaikki tekijät tai toimittajat: Taipale, Sami J.; Aalto, Sanni L.; Galloway, Aaron W. E.; Kuoppamäki, Kirsi; Nzobeuh, Polain; Peltomaa, Elina
Lehti tai sarja: Inland Waters
ISSN: 2044-2041
eISSN: 2044-205X
Julkaisuvuosi: 2019
Volyymi: 9
Lehden numero: 3
Artikkelin sivunumerot: 374-394
Kustantaja: Taylor & Francis
Julkaisumaa: Britannia
Julkaisun kieli: englanti
DOI: https://doi.org/10.1080/20442041.2019.1574177
Julkaisun avoin saatavuus: Ei avoin
Julkaisukanavan avoin saatavuus:
Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/66817
Tiivistelmä
Climate change and land-use practices can enhance lake eutrophication and browning, which influence phytoplankton composition by decreasing the availability of food high in nutritional quality (algae) and increasing the abundance of low-quality food (terrestrial detritus, bacteria) for herbivorous zooplankton. Nutritionally valuable algae for zooplankton are rich in essential biomolecules such as amino acids, polyunsaturated fatty acids (PUFAs), sterols, and phosphorus. We performed laboratory experiments and showed a stronger positive relationship between zooplankton (Daphnia) cumulative offspring number and availability of high-quality algae (Cryptophytes: Rhodomonas/Cryptomonas; and Chrysophytes: Mallomonas) than with intermediate-quality (Chlorophytes: Acutodesmus) or poor-quality (Dinoflagellates: Peridinium) algae. The higher cumulative offspring number of Daphnia was a result of higher amounts of total ω-3 and ω-6 PUFA, proteins, sterols, and amino acids in the algal diets. The experiments also showed that even a small addition of high-quality algae (Rhodomonas) to intermediate-quality (Acutodesmus) or low-quality (bacteria, heterotrophic nanoflagellates, or terrestrial organic matter) diets can enhance the Daphnia cumulative offspring production. Our carbon mass balance calculation for a eutrophic clearwater lake and an oligotrophic polyhumic lake showed that the abundance of high-quality phytoplankton (cryptophytes, chrysophytes, diatoms) among total particulate organic carbon was minor (8.7% [SD 2.4%] and 6.5% [7.0%]). We modeled Daphnia diets (i.e., resource assimilation) using a fatty acid mixing model. Our analyses showed that Daphnia were able to locate high-quality algae (cryptophytes, chrysophytes, and diatoms) more effectively during cyanobacteria blooms in a eutrophic lake (55% [SD 12%]) than in a polyhumic lake (25% [10%]). Nevertheless, our results show that intense eutrophication and browning diminish assimilation of high quality algae, limiting Daphnia biomass production.
YSO-asiasanat: aminohapot; bakteerit; rasvahapot; plankton
Vapaat asiasanat: amino acids; bacteria; fatty acids; heteronanoflagellates; phytoplankton; polyunsaturated sterols; zooplankton
Liittyvät organisaatiot
OKM-raportointi: Kyllä
Raportointivuosi: 2019
JUFO-taso: 1
