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dc.contributor.authorJohnson, Matthew D.  Concept link
dc.contributor.authorStoecker, Diane K.  Concept link
dc.contributor.authorMarshall, Harold G.  Concept link
dc.date.accessioned2013-04-18T15:52:54Z
dc.date.available2014-10-22T08:57:23Z
dc.date.issued2013-03
dc.identifier.urihttps://hdl.handle.net/1912/5854
dc.descriptionAuthor Posting. © The Author(s), 2013. This is the author's version of the work. It is posted here by permission of Oxford University Press for personal use, not for redistribution. The definitive version was published in Journal of Plankton Research 35 (2013): 877-893, doi:10.1093/plankt/fbt028.en_US
dc.description.abstractThe photosynthetic ciliate Mesodinium rubrum is a common member of coastal phytoplankton communities that is well adapted to low-light, turbid ecosystems. It supports the growth of or competes with harmful dinoflagellate species for cryptophyte prey, as well as being a trophic link to copepods and larval fish. We have compiled data from various sources (n = 1063), on the abundance and distribution of M. rubrum in Chesapeake Bay and its tributaries. Because M. rubrum relies on obtaining organelles from cryptophyte algae to maintain rapid growth, we also enumerated cryptophyte algae in the portion of these samples that we collected (n = 386). M. rubrum occurred in oligohaline to polyhaline regions of Chesapeake Bay and throughout the year. Blooms (>100 cells ml-1) of M. rubrum primarily occurred during spring, followed by autumn. When compared across all seasons, M. rubrum abundance was positively correlated to temperature and cryptophytes, and negatively correlated with salinity. However, more focused analyses revealed that M. rubrum abundance during spring was associated with surface layer warming and decreased salinity, while early autumn assemblages were associated with surface cooling. These results imply there are distinct seasonal niches for M. rubrum blooms. Blooms of M. rubrum were more common in tributaries than in the main stem Bay and tended to be restricted to salinities under 10 PSU. Despite the rarity of “red water” events, M. rubrum is a ubiquitous mixotroph in Chesapeake Bay and at times likely exerts a strong influence on cryptophyte algal abundance and hence planktonic food web structure.en_US
dc.description.sponsorshipMDJ and DKS would like to acknowledge funding from NSF 1031718 and 1031344.en_US
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen_US
dc.relation.urihttps://doi.org/10.1093/plankt/fbt028
dc.subjectMesodinium rubrumen_US
dc.subjectCryptophytesen_US
dc.subjectChesapeake Bayen_US
dc.subjectPhytoplanktonen_US
dc.subjectRed-tidesen_US
dc.titleSeasonal dynamics of Mesodinium rubrum in Chesapeake Bayen_US
dc.typePreprinten_US
dc.description.embargo2014-04-05en_US


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