Zooplankton feeding on the nuisance flagellate Gonyostomum semen.

The large bloom-forming flagellate Gonyostomum semen has been hypothesized to be inedible to naturally occurring zooplankton due to its large cell size and ejection of long slimy threads (trichocysts) induced by physical stimulation. In a grazing experiment using radiolabelled algae and zooplankton...

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Autores principales:	Karin S L Johansson, Tobias Vrede, Karen Lebret, Richard K Johnson
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2013
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/6bc706fdca6f4960a5974149ea21f543
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spelling	oai:doaj.org-article:6bc706fdca6f4960a5974149ea21f5432021-11-18T07:46:41ZZooplankton feeding on the nuisance flagellate Gonyostomum semen.1932-620310.1371/journal.pone.0062557https://doaj.org/article/6bc706fdca6f4960a5974149ea21f5432013-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23667489/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203The large bloom-forming flagellate Gonyostomum semen has been hypothesized to be inedible to naturally occurring zooplankton due to its large cell size and ejection of long slimy threads (trichocysts) induced by physical stimulation. In a grazing experiment using radiolabelled algae and zooplankton collected from lakes with recurring blooms of G. semen and lakes that rarely experience blooms, we found that Eudiaptomus gracilis and Holopedium gibberum fed on G. semen at high rates, whereas Daphnia cristata and Ceriodaphnia spp. did not. Grazing rates of E. gracilis were similar between bloom-lakes and lakes with low biomass of G. semen, indicating that the ability to feed on G. semen was not a result of local adaptation. The high grazing rates of two of the taxa in our experiment imply that some of the nutrients and energy taken up by G. semen can be transferred directly to higher trophic levels, although the predominance of small cladocerans during blooms may limit the importance of G. semen as a food resource. Based on grazing rates and previous observations on abundances of E. gracilis and H. gibberum, we conclude that there is a potential for grazer control of G. semen and discuss why blooms of G. semen still occur.Karin S L JohanssonTobias VredeKaren LebretRichard K JohnsonPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 8, Iss 5, p e62557 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Karin S L Johansson Tobias Vrede Karen Lebret Richard K Johnson Zooplankton feeding on the nuisance flagellate Gonyostomum semen.
description	The large bloom-forming flagellate Gonyostomum semen has been hypothesized to be inedible to naturally occurring zooplankton due to its large cell size and ejection of long slimy threads (trichocysts) induced by physical stimulation. In a grazing experiment using radiolabelled algae and zooplankton collected from lakes with recurring blooms of G. semen and lakes that rarely experience blooms, we found that Eudiaptomus gracilis and Holopedium gibberum fed on G. semen at high rates, whereas Daphnia cristata and Ceriodaphnia spp. did not. Grazing rates of E. gracilis were similar between bloom-lakes and lakes with low biomass of G. semen, indicating that the ability to feed on G. semen was not a result of local adaptation. The high grazing rates of two of the taxa in our experiment imply that some of the nutrients and energy taken up by G. semen can be transferred directly to higher trophic levels, although the predominance of small cladocerans during blooms may limit the importance of G. semen as a food resource. Based on grazing rates and previous observations on abundances of E. gracilis and H. gibberum, we conclude that there is a potential for grazer control of G. semen and discuss why blooms of G. semen still occur.
format	article
author	Karin S L Johansson Tobias Vrede Karen Lebret Richard K Johnson
author_facet	Karin S L Johansson Tobias Vrede Karen Lebret Richard K Johnson
author_sort	Karin S L Johansson
title	Zooplankton feeding on the nuisance flagellate Gonyostomum semen.
title_short	Zooplankton feeding on the nuisance flagellate Gonyostomum semen.
title_full	Zooplankton feeding on the nuisance flagellate Gonyostomum semen.
title_fullStr	Zooplankton feeding on the nuisance flagellate Gonyostomum semen.
title_full_unstemmed	Zooplankton feeding on the nuisance flagellate Gonyostomum semen.
title_sort	zooplankton feeding on the nuisance flagellate gonyostomum semen.
publisher	Public Library of Science (PLoS)
publishDate	2013
url	https://doaj.org/article/6bc706fdca6f4960a5974149ea21f543
work_keys_str_mv	AT karinsljohansson zooplanktonfeedingonthenuisanceflagellategonyostomumsemen AT tobiasvrede zooplanktonfeedingonthenuisanceflagellategonyostomumsemen AT karenlebret zooplanktonfeedingonthenuisanceflagellategonyostomumsemen AT richardkjohnson zooplanktonfeedingonthenuisanceflagellategonyostomumsemen
_version_	1718422978687926272

Zooplankton feeding on the nuisance flagellate Gonyostomum semen.

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