We consider a stoichiometric population model of two producers and one consumer. Stoichiometry can be thought of as the tracking of food quality in addition to food quantity. Our model assumes a reduced rate of conversion of biomass from producer to consumer when food quality is low. The model is open for carbon but closed for nutrient. The introduction of the second producer, which competes wi...

Fluorescence antibunching is a well-known technique for determining the number of independent emitters per molecule or molecular complex. It was rarely applied to autofluorescent proteins due to the necessity of collecting large numbers of fluorescence photons from a single molecule, which is usually impossible to achieve with rather photolabile autofluorescent proteins. Here, we measure fluore...

Article history: A range of calcium phosph Received 9 July 2008 Accepted in revised form 5 August 2008 Available online 13 August 2008

In ecosystems, species interact with other species directly and through abiotic factors in multiple ways, often forming complex networks of various types of ecological interaction. Out of this suite of interactions, predator-prey interactions have received most attention. The resulting food webs, however, will always operate simultaneously with networks based on other types of ecological intera...

A second polymorphic form of a 1 : 2 : 3 pamoate : DABCO : water salt has been obtained by liquid-assisted grinding, and it is shown that interconversion between this salt and a salt with 1 : 1 : 2 stoichiometry is facile via liquid-assisted grinding with additional amounts of pamoic acid (to generate the 1 : 1 : 2 salt) or DABCO (to generate the 1 : 2 : 3 salt).

In the Results and Methods sections, there are errors in the fourth and tenth equations. The variables M 1 should read as (M 1-1). Please view the complete, correct Equation 4 here: Q t ð Þ ¼ 2 M 1 À 1 ð Þ 1 À k bl t expðk bl tÞ À 1 þ mM 1 1 À expðÀk bl tÞ ð Þ Please view the complete, correction Equation 10 here: Q model t ð Þ ¼ 2 M 1 À 1 ð Þ 1 À k bl t expðk bl tÞ À 1 þ mM 1 1 À expðÀk bl tÞ ...

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Terrestrial microbial decomposer communities thrive on a wide range of organic matter types that rarely ever meet their elemental demands. In this review we synthesize the current state-of-the-art of microbial adaptations to resource stoichiometry, in order to gain a deeper understanding of the interactions between heterotrophic microbial communities and their chemical environment. The stoichio...