You are not currently logged in.
Access JSTOR through your library or other institution:
If You Use a Screen ReaderThis content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Ecological Stoichiometry and the Shape of Resource-Based Tradeoffs
Takehito Yoshida and Dag Hessen
Vol. 112, No. 2 (Feb., 2006), pp. 406-411
Stable URL: http://www.jstor.org/stable/3548678
Page Count: 6
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Preview not available
Fitness tradeoffs are expected when organisms must allocate a limited resource between two or more traits. Despite the fact that most resources are made up of multiple elements or components, tradeoff models have traditionally been implicitly or explicitly based on a single currency. Here I propose a model for a resource-based tradeoff between two traits that share two resource elements, and suggest ecological stoichiometry as a critical mechanism controlling the shape of tradeoffs. The tradeoff curve in the model has different shapes depending on the elemental stoichiometry of the traits and the available resource. I further describe a conceptual framework that combines a tradeoff curve with a fitness function to predict an optimal combination of traits in stoichiometrically different environments. The model suggests that even though the fitness function is fixed, an optimal combination of traits can vary depending on the stoichiometry of both the traits and the supplied resource.
Oikos © 2006 Nordic Society Oikos