In this continuation project, the specific objectives are to: 1) determine the sinking characteristics and depositional behavior of resuspended cysts in bottom sediments; 2) incorporate the USGS Community Sediment Transport Model into our existing physical-biological model for\u00a0Alexandrium<\/em>\u00a0dynamics in the GOM; 3) use this model formulation to explore the relationship between existing maps of cyst distribution and sediment type, and the thickness and cyst content of the BNL at different locations in the GOM;\u00a0 4) characterize cyst content and residence time in the BNL at different locations in the GOM with varying BNL thicknesses, taking into account both resuspension fluxes and lateral advection; 5) conduct numerical experiments to explore the processes involved in the sedimentation of newly formed\u00a0A. fundyense<\/em>\u00a0cysts, their deposition, reworking, and eventual redeposition in major cyst seedbeds in the GOM; and 6) optimize cyst mapping strategies to minimize cost without unacceptable loss of accuracy in model forecasts.<\/p>\n <\/p>\n The approach we will take will be to use observations from the parent project as well as new laboratory experiments and numerical model simulations to characterize cyst dynamics in surface waters, the BNL, and bottom sediments of the GOM.<\/p>\n Relevant Publications<\/strong><\/p>\n Anderson, D. M. and B.A. Keafer.\u00a0 1987.\u00a0An endogenous annual clock in the toxic marine dinoflagellate\u00a0Gonyaulax tamarensis.<\/a>\u00a0 Nature 172: 89-107.<\/p>\n Anderson, D.M., C.A. Stock, B.A. Keafer, A. Bronzino Nelson, B. Thompson, D.J. McGillicuddy, M. Keller, P.A. Matrai, and J. Martin.\u00a0 2005.\u00a0Alexandrium fundyense\u00a0cyst dynamics in the Gulf of Maine.<\/a>\u00a0Deep-Sea Res. II 52(19-21): 2522-2542.<\/p>\n Anderson, D.M., Y. Fukuyo, and K. Matsuoka.\u00a0Cyst methodologies<\/a>. 2003. pp. 165-190, in: Hallegraeff, G.M., D.M. Anderson and A.D. Cembella (eds.),\u00a0Manual on Harmful Marine Microalgae, Monographs on Oceanographic Methodology, 11, UNESCO.<\/p>\n Keafer, B.A., J.H. Churchill, and D.M. Anderson.\u00a0 2005.\u00a0Blooms of the toxic dinoflagellate,\u00a0Alexandrium fundyense, in the Casco Bay region of the western Gulf of Maine: Advection from offshore source populations and interactions with the Kennebec River plume.<\/a>\u00a0Deep-Sea Res. II 52(19-21): 2631-2655.<\/p>\n Keafer, B. A., K.O. Buesseler, and D. M. Anderson.\u00a0 1992.\u00a0Burial of living dinoflagellate cysts in estuarine and nearshore sediments.\u00a0<\/a>\u00a0Marine Micropaleontology 20:147-161.<\/p>\n McGillicuddy, D.J., Jr., D.M. Anderson, D.R. Lynch, and D.W. Townsend. 2005.\u00a0Mechanisms regulating large-scale seasonal fluctuations in\u00a0Alexandrium fundyense\u00a0populations in the Gulf of Maine: Results from a physical-biological model.\u00a0<\/a>Deep-Sea Res. II 52(19-21): 2698-2714.<\/p>\n McGillicuddy, D.J., Jr., R.P. Signell, C.A. Stock, B.A. Keafer, M.D. Keller, R.D. Hetland, and D.M. Anderson. 2003.\u00a0A mechanism for offshore initiation of harmful algal blooms in the coastal Gulf of Maine.<\/a>\u00a0J. Plankt. Res. 25(9): 1131-1138.<\/p>\n \t\t\t\t Deposition and resuspension of Alexandrium fundyense resting cysts in the Gulf of Maine: Phase II The Gulf of Maine (GOM) supports productive shellfisheries frequently impacted by paralytic shellfish poisoning (PSP) – a serious threat to human health caused by the toxic dinoflagellate\u00a0Alexandrium fundyense. PSP is the most widespread of the poisoning syndromes associated with harmful…<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":713,"menu_order":10,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"_links":{"self":[{"href":"https:\/\/www2.whoi.edu\/site\/andersonlab\/wp-json\/wp\/v2\/pages\/790"}],"collection":[{"href":"https:\/\/www2.whoi.edu\/site\/andersonlab\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www2.whoi.edu\/site\/andersonlab\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www2.whoi.edu\/site\/andersonlab\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www2.whoi.edu\/site\/andersonlab\/wp-json\/wp\/v2\/comments?post=790"}],"version-history":[{"count":2,"href":"https:\/\/www2.whoi.edu\/site\/andersonlab\/wp-json\/wp\/v2\/pages\/790\/revisions"}],"predecessor-version":[{"id":795,"href":"https:\/\/www2.whoi.edu\/site\/andersonlab\/wp-json\/wp\/v2\/pages\/790\/revisions\/795"}],"up":[{"embeddable":true,"href":"https:\/\/www2.whoi.edu\/site\/andersonlab\/wp-json\/wp\/v2\/pages\/713"}],"wp:attachment":[{"href":"https:\/\/www2.whoi.edu\/site\/andersonlab\/wp-json\/wp\/v2\/media?parent=790"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\n\t\t\t\t![\"In](\"https:\/\/www2.whoi.edu\/site\/andersonlab\/wp-content\/uploads\/sites\/20\/2018\/07\/CYST_cysts_250_47406.jpg\" "\\"CYST_cysts_250_47406\\"")
\n\t\t\t\t<\/a>
\n\t\tIn the western Maine region, one important focus is on the quantitative dynamics of cyst germination, since this produces the new cells that initiate blooms in that region. (Photo by D. Wall)
\n\t\t\t\t
\n\t\t\t\t![\"Kerry](\"https:\/\/www2.whoi.edu\/site\/andersonlab\/wp-content\/uploads\/sites\/20\/2018\/07\/CYST_mclane_sampler_550_47404.jpg\" "\\"CYST_mclane_sampler_550_47404\\"")
\n\t\t\t\t<\/a>
\n\t\tKerry Norton stands ready to deploy a McLane time-series phytoplankton sampler at a study site in the Gulf of Maine. The sampler will be deployed for six months in order to obtain time series data on resuspended cyst abundance within bottom sediments and the benthic nepheloid layer. (Photo by C.H. Pilskaln)<\/p>\n","protected":false},"excerpt":{"rendered":"