Random excitations in modelling of algal blooms in estuarine systems

Kalyan Das and Nurul Huda Gazi

Ecological Modelling, 2011, vol. 222, issue 14, 2495-2501

Abstract: This paper proposes and analyzes a non-linear model for the biological outbreaks that links the trophic structure of primary and secondary producers in the estuary. Some of the principles governing phytoplankton growth, biomass, and species composition in two-layered pelagic ecosystems are explored using an idealized, steady-state, mathematical model. Algal blooms often occur in estuary due to excessive flow of nutrients from domestic drainage, industrial and agricultural waste, and this causes the decrease in the concentration of dissolved oxygen in the estuary. We propose a description about interesting marine estuary systems which resembles to the behaviour of real media and construct a non-linear mathematical model with the main purpose of considering the severity and duration of algal blooms in the ecological arena. Although the environmental and physical factors that unleashed the bloom, but ensuing duration and severity of an outbreak are largely due to the subsequent biological interplay between organism. Hence, it threatens the survival of other species of the ecosystem indirectly, and also it is responsible for the degradation of water quality in the estuary because of less oxygen content. We give the results that are qualitatively resemble with those observed in the estuary and thereby offers an insight for the factors that sustain a bloom.

Keywords: Local stability; Diffusive instability; Stochasticity; White noises; Mean-square stability (search for similar items in EconPapers)
Date: 2011
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0304380010006277
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:ecomod:v:222:y:2011:i:14:p:2495-2501

DOI: 10.1016/j.ecolmodel.2010.11.022

Access Statistics for this article

Ecological Modelling is currently edited by Brian D. Fath

More articles in Ecological Modelling from Elsevier
Bibliographic data for series maintained by Catherine Liu ().