Modeling the influence of nutrients, turbulence and grazing on Pfiesteria population dynamics

Temporal and spatial variability in nitrogen uptake kinetics during harmful dinoflagellate blooms in the East China Sea

“…are global, bloomforming harmful dinoflagellates (Chang and Trench, 1982;Leblond and Chapman, 2002;Heil et al, 2004;Glibert et al, 2008b). Many ecological and physiological models have been developed to better understand bloom dynamics (Maier and Dandy, 1997;Thompson, 1998;Cloot and Pieterse, 1999;Walsh et al, 2001;Hood et al, 2006). The soundness of these models depends on sufficient parameterization of both environmental and physiological variables.…”

Mixotrophy, a major mode of nutrition for harmful algal species in eutrophic waters

“…Models that include the role of mixotrophy are needed to gain insights about the nutritional influences on harmful algae in eutrophic habitats in efforts to forecast HABs (Hood et al, 2006). Thingstad et al (1996Thingstad et al ( , p. 2108) described the historic and ongoing approach: ''.…”

“…The models indicated that mixotrophy represents a unique resource niche during the summer season; that mixotrophs tend to decrease primary production because of uptake of N from the DON pool; and that this decrease may be compensated for by the DON-supported primary production. Hood et al (2006) developed a semi-idealized marine ecosystem model to examine the population dynamics of strains of Pfiesteria that were in actively toxic versus nontoxic mode (the latter, with kleptochloroplasts). The model indicated that nontoxic blooms would occur in more turbulent, inorganic nutrient-rich conditions, whereas toxic blooms would be more likely in calm, organic nutrient-rich conditions under low grazing pressure.…”

Nitrogen uptake kinetics of Prymnesium parvum (Haptophyte)

“…Modeling the dynamics of HABs is becoming increasingly important and advanced in order to predict both the potential occurrence of, and the negative impacts from, HABs (e.g., Zhang et al, 2003;Hoagland and Scatasta, 2006;Hood et al, 2006;Glibert et al, 2010). The success of these models is dependent on an extensive knowledge of physiological characteristics, such as growth and nutritional preferences of the HAB species studied.…”