Weather driven influences on phytoplankton succession in a shallow lake during contrasting years: Application of PROTBAS

Abstract

A dynamic model which simulates variations in the biomass of several phytoplankton functional groups (PROTECH) has been reconstructed into the PROTBAS (PROTech Based Algal Simulations) model, and was tested in a large (61 km(2)), shallow (mean depth 3.4 m) windexposed lake basin at the western end of Lake Malaren, Sweden. A subroutine was added to the model to estimate the variation in light extinction resulting from wind action and river discharge. Also the rate of regeneration of nitrogen and silica was modified. The model captured the overall magnitude and succession of phytoplankton during two contrasting years: a warm and calm calibration year, and a cold windy validation year. The model shows good behavior in the northern temperate climate, which includes ice cover during winter. However, there were discrepancies between measured and modeled spring growth and autumn decline of the phytoplankton. (C) 2007 Elsevier B.V All rights reserved.

Keywords

numerical modeling; phytoplankton; allometric; PROTBAS; succession; functional groups; chlorophyll; water quality

Published in

Ecological Modelling
2007, Volume: 207, number: 2-4, pages: 128-136 Publisher: ELSEVIER SCIENCE BV

UKÄ Subject classification

Ecology


Publication identifier

DOI: https://doi.org/10.1016/j.ecolmodel.2007.04.023

Permanent link to this page (URI)

https://res.slu.se/id/publ/102708