Lake zooplankton δ13C values are strongly correlated with the δ13C values of distinct phytoplankton taxa
Taipale, S. J., Vuorio, K., Brett, M. T., Peltomaa, E., & Hiltunen, M. (2016). Lake zooplankton δ13C values are strongly correlated with the δ13C values of distinct phytoplankton taxa. Ecosphere, 7(8), Article e01392. https://doi.org/10.1002/ecs2.1392
© 2016 Taipale et al. This is an open access article under the terms of the Creative Commons Attribution License.
Analyses of carbon stable isotopes are often used to estimate the contributions of allochthonous and autochthonous dietary resources to aquatic consumers. Most pelagic food web studies assume that all phytoplankton taxa have a similar δ13C value. We studied pelagic food web compartments (dissolved inorganic carbon [DIC], phytoplankton, bacteria, seston, cladoceran zooplankton) in 12 small (< 0.1 km2) lakes in southern Finland. These lakes were classified as oligotrophic, mesotrophic, eutrophic, and dystrophic based on their concentrations of total phosphorus and dissolved organic carbon. Additionally, we studied phytoplankton photosynthetic carbon fractionation (εp) in laboratory conditions. The photosynthetic fractionation in 28 phytoplankton cultures from nine different phytoplankton classes varied significantly at the class level, and fractionation correlated significantly with the DIC concentration of the growth media. In small boreal lakes, the δ13C values of different phytoplankton taxa, as directly measured or estimated from the δ13C values of biomarker fatty acids, varied greatly (−18‰ to −44.5‰). Phytoplankton δ13C values varied significantly by lake type and were most depleted in dystrophic lakes even though the δ13C values of the DIC was similar to mesotrophic lakes. Further within-taxa variation was found between lakes and between different depths within a lake. Vertical samples from dystrophic lakes also showed lower εp in the phytoplankton from meta- and hypolimnion, possibly as a result of reduced light intensity. Altogether, in nine of the 10 sampled lakes, the δ13C values of cladoceran zooplankton were between the minimum and the maximum phytoplankton δ13C value of each lake, and thus, phytoplankton alone could explain zooplankton δ13C values. We conclude that stable isotope mixing models should take into account carbon variation among different phytoplankton taxa. ...
PublisherEcological Society of America
Publication in research information system
MetadataShow full item record
Except where otherwise noted, this item's license is described as © 2016 Taipale et al. This is an open access article under the terms of the Creative Commons Attribution License.
Showing items with similar title or keywords.
Feeding Aquatic Ecosystems : Whole-Lake Experimental Addition of Angler’s Ground Bait Strongly Affects Omnivorous Fish Despite Low Contribution to Lake Carbon Budget Mehner, Thomas; Rapp, Tobias; Monk, Christopher T.; Beck, Mara E.; Trudeau, Ashley; Kiljunen, Mikko; Hilt, Sabine; Arlinghaus, Robert (Springer New York LLC, 2019)It is well documented that aquatic ecosystems may be subsidized by naturally derived terrestrial carbon sources. In contrast, the intentional or unintentional subsidy of animal populations by human-derived feed resources ...
Sexes in gynodioecious Geranium sylvaticum do not differ in their isotopic signature or photosynthetic capacity Varga, Sandra; Kytöviita, Minna-Maarit (Wiley-Blackwell Publishing Ltd., 2017)In gynodioecious plants, females are expected to produce more or better seeds than hermaphrodites in order to be maintained within the same population. Even though rarely measured, higher seed production can be achieved ...
Taipale, Sami J.; Galloway, Aaron W. E.; Aalto, Sanni L.; Kahilainen, Kimmo K.; Strandberg, Ursula; Kankaala, Paula (Nature Publishing Group, 2016)Freshwater food webs can be partly supported by terrestrial primary production, often deriving from plant litter of surrounding catchment vegetation. Although consisting mainly of poorly bioavailable lignin, with low ...
Poor nutritional quality of primary producers and zooplankton driven by eutrophication is mitigated at upper trophic levels Taipale, Sami Johan; Ventelä, Anne‐Mari; Litmanen, Jaakko; Anttila, Lauri (John Wiley & Sons, 2022)Eutrophication and rising water temperature in freshwaters may increase the total production of a lake while simultaneously reducing the nutritional quality of food web components. We evaluated how cyanobacteria blooms, ...