Submission Title

Consideration of Type III Holling Predation in Harmful Algal Blooms

Presenter Information

James Winslow, Gonzaga University

Session Number

SS1A

Location

Robinson 310

Abstract Number

SS1A-b

Abstract

Algal blooms have become an increasingly regular occurrence in coastal ocean regions. The most important factors in determining if these blooms occur are the seasonal processes of coastal upwelling, river flow, and human fertilizer runoff. The cyclical nature of plankton populations due to nutrient availability results in interesting dynamics within the affected marine ecosystems. Furthermore, some species of phytoplankton have evolved a mechanism for producing toxins that limit predation by predatory zooplankton: a phenomenon that complicates the dynamics further. This particular kind of phytoplankton growth is called a harmful algal bloom (HAB). In 2002, a Holling type II model was proposed by J. Chattopadhyay and R.R. Sarkar to understand HABs in the Bay of Bengal. In this paper, I will consider the dynamics that result from assuming a Holling type III model for predation of phytoplankton by zooplankton instead of a type II model.

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Apr 23rd, 9:00 AM Apr 23rd, 10:30 AM

Consideration of Type III Holling Predation in Harmful Algal Blooms

Robinson 310

Algal blooms have become an increasingly regular occurrence in coastal ocean regions. The most important factors in determining if these blooms occur are the seasonal processes of coastal upwelling, river flow, and human fertilizer runoff. The cyclical nature of plankton populations due to nutrient availability results in interesting dynamics within the affected marine ecosystems. Furthermore, some species of phytoplankton have evolved a mechanism for producing toxins that limit predation by predatory zooplankton: a phenomenon that complicates the dynamics further. This particular kind of phytoplankton growth is called a harmful algal bloom (HAB). In 2002, a Holling type II model was proposed by J. Chattopadhyay and R.R. Sarkar to understand HABs in the Bay of Bengal. In this paper, I will consider the dynamics that result from assuming a Holling type III model for predation of phytoplankton by zooplankton instead of a type II model.