Microcystins in planktonic and benthic food web components from Greenlandic lakes
| Autor: | Kathryn L. Cottingham, Jessica V. Trout-Haney |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
Cyanobacteria Ecology biology 010604 marine biology & hydrobiology aquatic 010501 environmental sciences Plankton biology.organism_classification cyanobacteria 01 natural sciences Food web Arctic cyanotoxins 13. Climate action Benthic zone food webs 14. Life underwater QH540-549.5 Ecology Evolution Behavior and Systematics 0105 earth and related environmental sciences |
| Zdroj: | Ecosphere, Vol 12, Iss 6, Pp n/a-n/a (2021) |
| ISSN: | 2150-8925 |
| DOI: | 10.1002/ecs2.3539 |
| Popis: | There is increasing global concern regarding the social, economic, human health, and environmental health implications of cyanotoxins. However, much of what we know about cyanotoxins comes from studies of temperate or tropical systems with conspicuous surface blooms of cyanobacteria. We measured the concentrations of microcystins (MCs), potent cyanotoxins produced by many cyanobacterial taxa, within lake food webs in southwestern Greenland. We detected MCs in six taxonomic groups of organisms and found that median MC concentrations in large (>50 µm) phytoplankton were an order of magnitude higher than benthic cyanobacteria (genus Nostoc) and two orders of magnitude higher than benthic grazers and consumers (snails, dytiscid larvae, and chironomid larvae). Microcystin concentrations generally decreased with increasing trophic position, suggesting that biomagnification does not occur in these lakes. We conclude that MCs are prevalent in multiple components of these Arctic aquatic food webs and that both benthic and pelagic taxa may be sources of MCs. |
| Databáze: | OpenAIRE |
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