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Anderson, Don L.; McGillicuddy, Dennis J.; Townsend, David; Turner, Jeff

doi:10.1016/j.dsr2.2005.08.001

Cited by 32 publications

(12 citation statements)

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“…A gulf-wide water column survey of Alexandrium completed in May 2005 and subsequent 2005 summer month surveys in the western gulf showed a substantial Alexandrium bloom extending from the western Gulf of Maine (WGOM) to mid-coast Maine and persisting until July (Anderson et al, 2005b). The highest May surface cell concentrations of >10 3 cells l −1 were observed in WGOM/Massachusetts Bay as compared to values of <20 cells l −1 measured in the surface waters of Jordan Basin (Anderson et al, 2005b).…”

Section: Resultsmentioning

confidence: 99%

“…Since 2004, ECOHAB studies (ECOHAB-GOM and GOMTOX) have produced large-scale surveys of Alexandrium distributions and maps of benthic cyst abundance (Townsend et al, 2001, 2005; Anderson et al, 2005a,b,c; Keafer et al, 2005a,b; Anderson et al, 2014). The water column and sediment distributions of Alexandrium cells and cysts suggest that a very large cyst seed-bed in the Bay of Fundy (BOF) is a source of recurrent spring-summer blooms that feed the Maine Coastal Current (MCC) (Townsend et al, 2001; Anderson et al, 2005a; McGillicuddy et al, 2005; Pettigrew et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

“…The water column and sediment distributions of Alexandrium cells and cysts suggest that a very large cyst seed-bed in the Bay of Fundy (BOF) is a source of recurrent spring-summer blooms that feed the Maine Coastal Current (MCC) (Townsend et al, 2001; Anderson et al, 2005a; McGillicuddy et al, 2005; Pettigrew et al, 2005). Another cyst bed offshore of Casco and Penobscot Bays is hypothesized to be an additional source of Alexandrium blooms occurring in the western GOM and Massachusetts Bay region via the western segment of the MCC, transporting Alexandrium to the west and south (McGillicuddy et al, 2003, 2005; Anderson et al, 2005a,b; Pettigrew et al, 2005; Townsend et al, 2005). …”

Section: Introductionmentioning

confidence: 99%

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Spatial and temporal variability of Alexandrium cyst fluxes in the Gulf of Maine: Relationship to seasonal particle export and resuspension

Pilskaln

Anderson

McGillicuddy

et al. 2014

Deep Sea Research Part II: Topical Studies in Oceanography

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Quantification of Alexandrium cyst fluxes through the Gulf of Maine water column is central to understanding the linkage between the source and fate of annual Alexandrium blooms in the offshore waters. These blooms often lead to paralytic shellfish poisoning (PSP) and extensive closures of shellfish beds. We report here on time-series sediment trap deployments completed at four offshore locations in the gulf between 2005 and 2010 as components of two ECOHAB–GOM field programs. Data presented documents the substantial spatial and temporal fluctuations in Alexandrium fundyense cyst fluxes in the gulf. Cyst delivery out of the euphotic zone peaked primarily between July and August following annual spring–summer Alexandrium blooms and was greatest in the western gulf. At all sites, cyst flux maxima to the subsurface waters were rarely coincident with seasonal peaks in the total mass export of particulate material indicating that cyst delivery was primarily via individually sinking cysts. Where persistent benthic nepheloid layers (BNLs) exist, significant sediment resuspension input of cysts to the near-bottom water column was evidenced by deep cyst fluxes that were up to several orders of magnitude greater than that measured above the BNL. The largest cyst fluxes in the BNL were observed in the eastern gulf, suggesting greater resuspension energy and BNL cyst inventories in this region. Temporal similarities between peak cyst export out of the upper ocean and peak cyst fluxes in the BNL were observed and document the contribution of seasonal, newly formed cysts to the BNL. The data however also suggest that many Alexandrium cells comprising the massive, short-lived blooms do not transition into cysts. Time-series flow measurements and a simple 1D model demonstrate that the BNL cyst fluxes reflect the combined effects of tidal energy-maintained resuspension, deposition, and input of cysts from the overlying water column.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Spatial and temporal variability of Alexandrium cyst fluxes in the Gulf of Maine: Relationship to seasonal particle export and resuspension

Pilskaln

Anderson

McGillicuddy

et al. 2014

Deep Sea Research Part II: Topical Studies in Oceanography

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“…Perhaps the clearest model system illustrating such an approach is that of Alexandrium spp. blooms in the Gulf of Maine, where biological and physical controls of bloom inception and regional expansion are well understood (Anderson et al 2005). Susceptible coastline across three New England states can be effectively monitored by relatively few strategically placed monitoring sites.…”

Section: Discussionmentioning

confidence: 99%

Harmful phytoplankton ecology studies using an autonomous molecular analytical and ocean observing network

Ryan

Greenfield

et al. 2011

Limnology & Oceanography

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Using autonomous molecular analytical devices embedded within an ocean observatory, we studied harmful algal bloom (HAB) ecology in the dynamic coastal waters of Monterey Bay, California. During studies in 2007 and 2008, HAB species abundance and toxin concentrations were quantified periodically at two locations by Environmental Sample Processor (ESP) robotic biochemistry systems. Concurrently, environmental variability and processes were characterized by sensors co-located with ESP network nodes, regional ocean moorings, autonomous underwater vehicle surveys, and satellite remote sensing. The two locations differed in their longterm average physical and biological conditions and in their degree of exposure to episodic wind-forced variability. While anomalously weak upwelling and strong stratification during the 2007 study favored toxigenic dinoflagellates (Alexandrium catenella), anomalously strong upwelling during the 2008 study favored toxigenic diatoms (Pseudo-nitzschia spp.). During both studies, raphidophytes (Heterosigma akashiwo) were detected within a similar range of concentrations, and they reached higher abundances at the relatively sheltered, stratified site. During 2008, cellular domoic acid reached higher concentrations and was far more variable at the shallower ESP node, where phytoplankton populations were influenced by resuspended sediments. Episodic variability caused by wind forcing, lateral mixing, internal waves, and subsurface phytoplankton layers influenced ESP detection patterns. The results illustrate the importance of mobilizing HAB detection on autonomous platforms that can intelligently target sample acquisition as a function of environmental conditions and biological patch encounter.

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“…Toxic Alexandrium species are widely distributed around the world, and their population dynamics and potential impacts have been extensively studied since the 1980s (for example, Anderson et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Short-term effects of different nitrogen substrates on growth and toxin production of dinoflagellate Alexandrium catenella Balech (strain ACDH)

Zhou

2011

Harmful Algae

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Cited by 32 publications

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Spatial and temporal variability of Alexandrium cyst fluxes in the Gulf of Maine: Relationship to seasonal particle export and resuspension

Spatial and temporal variability of Alexandrium cyst fluxes in the Gulf of Maine: Relationship to seasonal particle export and resuspension

Harmful phytoplankton ecology studies using an autonomous molecular analytical and ocean observing network

Short-term effects of different nitrogen substrates on growth and toxin production of dinoflagellate Alexandrium catenella Balech (strain ACDH)

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