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Learn how organisms can grow exponentially when resources are unlimited, and how this growth is affected by competition and carrying capacity. See examples, equations, graphs and references for biological exponential growth.
Learn about the dynamics of species populations and how they interact with the environment, such as birth and death rates, and by immigration and emigration. Explore the history, terminology, and models of population ecology, and its applications in conservation biology and fisheries and wildlife management.
A further example is provided by the experimental iron fertilization of the ocean. In several experiments large amounts of iron salts were dissolved in the ocean. The expectation was that iron, which is a limiting nutrient for phytoplankton, would boost growth of phytoplankton and that it would sequester carbon dioxide from the atmosphere.
Exponential growth is a process that increases quantity over time at an ever-increasing rate. It occurs when the rate of change is proportional to the quantity itself. See examples, formula, and applications in biology, physics, economics, finance, and computer science.
A Malthusian growth model is a mathematical formula that describes exponential population growth based on the idea of the function being proportional to the speed to which the function grows. The model is named after Thomas Robert Malthus, who wrote an influential essay on population dynamics in 1798.
Population dynamics is the mathematical study of the size and age composition of populations as dynamical systems. It covers topics such as Malthusian growth, logistic equation, intrinsic rate of increase, epidemiology and geometric populations.
The carrying capacity of an environment is the maximum population size of a biological species that can be sustained by that specific environment. The web page does not mention any animal commonly used for carrying supplies, but it explains the concept of carrying capacity in ecology, agriculture and fisheries.
Figure 1: A bi-phasic bacterial growth curve.. A growth curve is an empirical model of the evolution of a quantity over time. Growth curves are widely used in biology for quantities such as population size or biomass (in population ecology and demography, for population growth analysis), individual body height or biomass (in physiology, for growth analysis of individuals).