Recommended Conferences

International Conference on Climate Change Global Warming

Berlin, Germany
Related Subjects
 

Environmental factors contributing to the development and demise of a toxic dinoflagellate (Karlodinium veneficum) bloom in a shallow, eutrophic, lagoonal estuary

Author(s): Hall NS, Litaker RW, Fensin E, Adolf JE, Bowers HA, et al.

Abstract

A dense bloom of the ichthyotoxic dinoflagellate Karlodinium veneficum was discovered in the Neuse River Estuary, North Carolina, on 19 October 2006 and was associated with four subsequent fish kills. Microscopic, photopigment, DNA, and toxicological techniques confirmed bloom identity and toxicity. High-resolution spatio-temporal data from ship-board and fixed automated sampling stations provided a unique opportunity to investigate the environmental conditions that initiated, maintained, and terminated the K. veneficum bloom. Bloom initiation and growth were favored by high nutrient availability and reduced dispersal during the period of declining riverine discharge after Tropical Storm Ernesto. K. veneficum out-competed other co-occurring dinoflagellates, perhaps because of the production of karlotoxins that are known to act as grazing deterrents and to facilitate mixotrophic feeding. Once the bloom was established, small-scale hydrodynamic processes, coupled with vertical migration, concentrated cells along a frontal convergence to high densities (>200,000 cells per milliliter). By 26 October 2006, wind mixing and possible nutrient stress disrupted the bloom. Release of cell-bound toxins during the bloom collapse likely accounted for the associated fish kill events where fish were reported as exhibiting typical symptoms of karlotoxin poisoning. The dynamics of this bloom underscore the tight control of harmful algal blooms by meteorological forcing, hydrology, and sediment nutrient input in this shallow lagoonal estuary.

Similar Articles

Dinoflagellates: a remarkable evolutionary experiment

Author(s): Hackett JD, Anderson DM, Erdner DL, Bhattacharya D

Dinoflagellate diversity and distribution

Author(s): Taylor FJ, Hoppenrath M, Saldarriaga JF

Gene expression in proliferating cells of the dinoflagellate Alexandrium catenella (Dinophyceae)

Author(s): Toulza E, Shin MS, Blanc G, Audic S, Laabir M, et al.

Review of the main ecological features affecting benthic dinoflagellate blooms

Author(s): Fraga S, Rodríguez F, Bravo I, Zapata M, Marañón E

Genome evolution of a tertiary dinoflagellate plastid

Author(s): Gabrielsen TM, Minge MA, Espelund M, Tooming-Klunderud A, Patil V, et al.

Cell biology of cnidarian-dinoflagellate symbiosis

Author(s): Davy SK, Allemand D, Weis VM

Interactions between corals and their symbiotic algae

Author(s): Muller-Parker G, D’Elia CF, Cook CB

Symbiodinium transcriptomes: genome insights into the dinoflagellate symbionts of reef-building corals

Author(s): Bayer T, Aranda M, Sunagawa S, Yum LK, DeSalvo MK, et al.

A review on the effects of environmental conditions on growth and toxin production of Ostreopsis ovata

Author(s): Pistocchi R, Pezzolesi L, Guerrini F, Vanucci S, Dell’Aversano C, et al.

Harmful algal blooms and eutrophication: examining linkages from selected coastal regions of the United States

Author(s): Anderson DM, Burkholder JM, Cochlan WP, Glibert PM, Gobler, et al.

Putting the N in dinoflagellates

Author(s): Dagenais-Bellefeuille S, Morse D

Dinoflagellate bloom of Karenia mikimotoi along the Southeast Arabian Sea, bordering western India

Author(s): Robin RS, Kanuri VV, Muduli PR, Mishra RK, Jaikumar M, et al.

The mesozoic radiation of eukaryotic algae: the portable plastid hypothesis

Author(s): Grzebyk D, Schofield O, Vetriani C, Falkowski PG

Problems associated with shellfish farming

Author(s): Chinabut S, Somsiri T, Limsuwan C, Lewis S

Ballast water: a review of the impact on the world public health

Author(s): Takahashi CK, Lourenco NGGS, Lopes TF, Rall VLM, Lopes CAM

The globally distributed genus Alexandrium: multifaceted roles in marine ecosystems and impacts on human health

Author(s): Anderson DM, Alpermann TJ, Cembella AD, Collos Y, Masseret E, et al.

Neurotoxic shellfish poisoning

Author(s): Watkins SM, Reich A, Fleming LE, Hammond R

Global distribution of ciguatera causing dinoflagellates in the genus Gambierdiscus

Author(s): Litaker RW, Vandersea MW, Faust MA, Kibler SR, Nau AW, et al.

Evolution of saxitoxin synthesis in cyanobacteria and dinoflagellates

Author(s): Hackett JD, Wisecaver JH, Brosnahan ML, Kulis DM, Anderson DM, et al.

Ecology and oceanography of harmful marine microalgae (Project-2)

Author(s): Fukuyo Y, Kodama M, Omura T, Furuya K, Furio EF, et al.

Marine toxins: Chemistry, toxicity, occurrence and detection, with special reference to the Dutch situation

Author(s): Gerssen A, Pol-Hofstad, IE, Poelman M, Mulder PP, Van den T, et al.