Since the conditions are ideal and the reproducing organisms increase in numbers with every generation this means that it is exponentially growing. It can't be carrying capacity. It is not a logistic growth. And they don't have competition here so it can't be competition.
<span>The reason is that there are a number of processes which are being carried out by the living organisms and they include the application of diffusion. ;)</span>
The ocean around the globe gets heated up due to the heat around the sun. This hot water is then passed through to the colder regions of the globe by the method of convection. This is a continuous process.