Toward predicting climate change effects on lakes:a comparison of 1656 shallow lakes from Florida and Denmark reveals substantial differences in nutrient dynamics, metabolism, trophic structure, and top-down control
| Autor: | Gary L. Warren, Karl E. Havens, Tserenpil Sh, Roger W. Bachmann, Daniel E. Canfield, Gaohua Ji, Erik Jeppesen, Robert P. Rutter, Torben L. Lauridsen, Liselotte S. Johansson, Martin Søndergaard, Mark V. Hoyer |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
fish 010504 meteorology & atmospheric sciences Ecology 010604 marine biology & hydrobiology plankton Climate change Aquatic Science Plankton 01 natural sciences Ecosystem structure Macrophyte macrophytes Nutrient benthic invertebrates nutrients Environmental science Fish Water quality 0105 earth and related environmental sciences Water Science and Technology Trophic level |
| Zdroj: | Jeppesen, E, Canfield, D E, Bachmann, R W, Søndergaard, M, Havens, K E, Johansson, L S, Lauridsen, T L, Sh, T, Rutter, R P, Warren, G, Ji, G & Hoyer, M V 2020, ' Toward predicting climate change effects on lakes : a comparison of 1656 shallow lakes from Florida and Denmark reveals substantial differences in nutrient dynamics, metabolism, trophic structure, and top-down control ', Inland Waters, vol. 10, no. 2, pp. 197-211 . https://doi.org/10.1080/20442041.2020.1711681 |
| DOI: | 10.1080/20442041.2020.1711681 |
| Popis: | Rapid climate changes may potentially have strong impacts on the ecosystem structure and nutrient dynamics of lakes as well as implications for water quality. We used a space-for-time approach to elucidate such possible effects by comparing data from 1656 shallow lakes (mean depth −1. Physicochemical variables showed significant seasonal differences, which can be attributed to different sunlight regimes and temperatures. The FL lakes had overall higher fish biomasses (notably in the littoral zone) but a substantially lower zooplankton biomass and body mass of microcrustaceans, a much lower zooplankton:phytoplankton biomass ratio (lower grazing on phytoplankton), and a markedly lower biomass of benthic invertebrates, indicating much greater control of consumers by fish in the FL lakes. Accordingly, the summer phytoplankton biomass was higher in the FL lakes. Cyanobacteria in summer were proportionally more important in the FL lakes at all TP levels, whereas the proportion of dinophytes, chrysophytes, and cryptophytes was higher in the DK lakes at low TP. Submerged macrophytes occurred at higher TP (>100 µg L−1) in the FL lakes, but coverage was higher in the DK lakes at low TP. We also found lower oxygen saturation in the nutrient-rich FL lakes than in the DK lakes, suggesting lower net ecosystem production in the FL lakes. We discuss our results within the framework of climate warming. |
| Databáze: | OpenAIRE |
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