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dc.contributor.authorFischer, Alexis D.  Concept link
dc.contributor.authorBrosnahan, Michael L.  Concept link
dc.contributor.authorAnderson, Donald M.  Concept link
dc.date.accessioned2018-10-02T19:04:22Z
dc.date.available2018-10-02T19:04:22Z
dc.date.issued2018-06-05
dc.identifier.urihttps://hdl.handle.net/1912/10615
dc.descriptionAuthor Posting. © The Author(s), 2018. This is the author's version of the work. It is posted here under a nonexclusive, irrevocable, paid-up, worldwide license granted to WHOI. It is made available for personal use, not for redistribution. The definitive version was published in Protist 169 (2018): 645-661, doi:10.1016/j.protis.2018.06.001.en_US
dc.description.abstractMany dinoflagellate cysts experience dormancy, a reversible state that prevents germination during unfavorable periods. Several of these species also cause harmful algal blooms (HABs), so a quantitative understanding of dormancy cycling is desired for better prediction and mitigation of bloom impacts. This study examines the effect of cold exposure on the duration of dormancy in Alexandrium catenella, a HAB dinoflagellate that causes paralytic shellfish poisoning (PSP). Mature, dormant cysts from Nauset Marsh (Cape Cod, MA USA) were stored at low but above freezing temperatures for up to six months. Dormancy status was then determined at regular intervals using a germination assay. Dormancy timing was variable among temperatures and was shorter in colder treatments, but the differences collapse when temperature and duration of storage are scaled by chilling-units (CU), a common horticultural predictor of plant and insect development in response to weather. Cysts within Nauset meet a well-defined chilling requirement by late January, after which they are poised to germinate with the onset of favorable conditions in spring. Cysts thus modulate their dormancy cycles in response to their temperature history, enhancing the potential for new blooms and improving this species’ adaptability to both unseasonable weather and new habitats/climate regimes.en_US
dc.description.sponsorshipThis work was supported by the National Science Foundation [OCE-0430724, OCE-0911031]; the National Institute of Environmental Health Sciences [1P50-ES01274201, 1P01ES021923]; the National Park Service Cooperative Agreement [H238015504]; and the Friends of Cape Cod National Seashore.en_US
dc.language.isoen_USen_US
dc.relation.urihttps://doi.org/10.1016/j.protis.2018.06.001
dc.subjectResting cysten_US
dc.subjectDinoflagellateen_US
dc.subjectDormancyen_US
dc.subjectChillingen_US
dc.subjectGerminationen_US
dc.subjectEndogenous clocken_US
dc.titleQuantitative response of Alexandrium catenella cyst dormancy to cold exposureen_US
dc.typePreprinten_US


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