Journal
APPLIED SCIENCES-BASEL
Volume 11, Issue 19, Pages -Publisher
MDPI
DOI: 10.3390/app11199294
Keywords
assimilation; carbon; filter-feeder; nitrogen; stable isotope; Unio douglasiae; uptake; toxic Microcystis
Categories
Funding
- Agricultural Technology Development Center, Ministry of Agriculture and Forestry, Korea [306009-03-2-CG000]
- National Institute of Environmental Research R&D of the Korean government [NIER-2019-01-02-066]
- National Research Foundation of the Korea government (MSIP)
- [NRF-2016R1E1A1A01943004]
- Korea Environmental Industry & Technology Institute (KEITI) [NIER-2019-01-02-066] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The study found that Unio douglasiae can effectively intake toxic Microcystis cells, but can only assimilate small amounts of nutrients into tissues within three days, despite a non-flowing system.
We investigated the possible intake of toxic cyanobacteria (Microcystis aeruginosa) as a nutrient resource for a filter-feeder bivalve (Unio douglasiae) based on the measurement of feeding and assimilation rates of carbon and nitrogen in a limited space with no current for 72 h using C-13 and N-15 dual isotope tracers. With high clearance rates, the unionid rapidly removed Microcystis cells within 24 h, but only a small amount of carbon and nitrogen were incorporated into the tissues. Even with the low assimilation rates, the mussels showed more favorable uptake of carbon than of nitrogen from toxic Microcystis water, and of tissues, the gills and gut accumulated more carbon and nitrogen than the muscle and mantle. Collectively, our findings indicate that although Unio douglasiae effectively uptake toxic Microcystis cells, they can assimilate only low amounts of nutrients into tissues within three days, despite a non-flowing system.
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