Selective feeding in Southern Ocean key grazers—diet composition of krill and salps
| Autor: | Bettina Meyer, Katja Metfies, Philipp Wenta, Clara M. Flintrop, Thomas H. Badewien, Martin Graeve, Evgeny A. Pakhomov, Stefan Neuhaus, Nora-Charlotte Pauli, Morten Hvitfeldt Iversen |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
Krill QH301-705.5 media_common.quotation_subject Medicine (miscellaneous) Biology 01 natural sciences General Biochemistry Genetics and Molecular Biology Competition (biology) 03 medical and health sciences Abundance (ecology) RNA Ribosomal 18S Animals Ecosystem 14. Life underwater Urochordata Biology (General) 030304 developmental biology media_common Ecological niche 0303 health sciences Ecology 010604 marine biology & hydrobiology Diet composition Fatty Acids fungi Plankton biology.organism_classification Diet Habitat General Agricultural and Biological Sciences Euphausiacea |
| Zdroj: | Communications Biology, Vol 4, Iss 1, Pp 1-12 (2021) EPIC3Communications Biology, Springer Nature, 4(1), ISSN: 2399-3642 |
| ISSN: | 2399-3642 |
| Popis: | Over the past decades, two key grazers in the Southern Ocean (SO), krill and salps, have experienced drastic changes in their distribution and abundance, leading to increasing overlap of their habitats. Both species occupy different ecological niches and long-term shifts in their distributions are expected to have cascading effects on the SO ecosystem. However, studies directly comparing krill and salps are lacking. Here, we provide a direct comparison of the diet and fecal pellet composition of krill and salps using 18S metabarcoding and fatty acid markers. Neither species’ diet reflected the composition of the plankton community, suggesting that in contrast to the accepted paradigm, not only krill but also salps are selective feeders. Moreover, we found that krill and salps had broadly similar diets, potentially enhancing the competition between both species. This could be augmented by salps’ ability to rapidly reproduce in favorable conditions, posing further risks to krill populations. |
| Databáze: | OpenAIRE |
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