Grazing impact of the calanoid copepods Acartia spp. on the toxic dinoflagellate Alexandrium pseudogonyaulax in the western coastal waters of Korea.

Autor:	Lee MJ; Department of Marine Biotechnology, Anyang University, Incheon, Republic of Korea., Hwang YJ; School of Earth and Environmental Sciences, College of Natural Sciences, Seoul National University, Seoul, Republic of Korea., Choi YB; Department of Ocenogaphy, College of Ocean Sciences, Kunsan National University, Kunsan, Republic of Korea., Yoo YD; Department of Ocenogaphy, College of Ocean Sciences, Kunsan National University, Kunsan, Republic of Korea.
Jazyk:	angličtina
Zdroj:	Frontiers in microbiology [Front Microbiol] 2024 Jun 19; Vol. 15, pp. 1400343. Date of Electronic Publication: 2024 Jun 19 (Print Publication: 2024).
DOI:	10.3389/fmicb.2024.1400343
Abstrakt:	Marine dinoflagellate species in the genus Alexandrium are well known to produce paralytic shellfish poison as well as common coastal species with cosmopolitan distribution. However, few studies on the feeding of copepods on Alexandrium species have been conducted. The toxic dinoflagellate Alexandrium pseudogonyaulax contains goniodomin A and causes red tides in many countries. To investigate the relationship between the toxic dinoflagellate A. pseudogonyaulax and the calanoid copepods Acartia spp., we quantified the ingestion rates of Acartia spp. feeding on A. pseudogonyaulax as a function of prey concentration. Additionally, we estimated grazing coefficients by integrating data from field observations of Acartia spp. and coexisting A. pseudogonyaulax with laboratory measurements of ingestion rates obtained during this investigation. Furthermore, we compared the ingestion rates of Acartia spp. and other predators feeding on Alexandrium species as previously reported. The ingestion rates of Acartia spp. on A. pseudogonyaulax increased continuously with increasing mean prey concentration. The highest values among the ingestion rate of Acartia spp. feeding on A . pseudogonyaulax was 3,407 cells predator -1 d -1 (4,872 ng C predator -1 d -1 ) at the given prey concentration. The calculated grazing coefficients for Acartia spp. on A. pseudogonyaulax in Shiwha Bay, Korea, were up to 0.073 d -1 . The results of this study suggest that A. pseudogonyaulax may decrease or maintain the population of Acartia spp. in marine food webs. Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. The author(s) declared that they were an editorial board member of Frontiers, at the time of submission. This had no impact on the peer review process and the final decision. (Copyright © 2024 Lee, Hwang, Choi and Yoo.)
Databáze:	MEDLINE
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