THE BASICS

THE BASICS

THE BASICS • Temperature increases biological processes, photosynthesis, growth and predation by ca. x2 per 10°C, but only within a narrow range (ca. 10-15°C) for a given species. • All organisms exhibit optimal temperature ranges; too low some may become dormant; too high and death occurs. • High temperature decreases O2 solubility, while also promoting organism use of O2. Any excess O2 production through photosynthesis is lost to the atmosphere. • Combinations of high nutrient loads, promoting microalgal growth, high temperature (increasing microalgal growth rates beyond control by zooplankton and decreasing O2 solubility) and low wind (limiting the entry of O2 into the water), can create conditions where the eventual decay of the biomass draws O2 down to levels which are too low (hypoxic) for animals, causing death and further decay. • Explore these interactions using a simulation model. TO RUN THE MODEL, IF NOT YET INSTALLED, INSTALL POWERSIM 10 STUDIO COCKPIT, LOAD THE MODEL • The Powersim Studio 10 Cockpit application works only on PCs operating Microsoft Windows. • Visit the Powersim Studio download site at https://powersim.com/download-cockpit/ • Download Cockpit (64-bit or 32-bit; most PCs will be 64-bit). • Follow instructions provided by Powersim to install the software. (Accept default suggestions) • Download the models from XXXXXXXXXXXXXXXXXXXXXXXXX • To run a model, locate the file in your MS Windows file directory using Explorer. • The file should have the Powersim Studio 10 logo associated with it - clicking on the file name will open the file within the application. • The model will open into a Home page; follow the onscreen instructions !