Molecular clocks: The heavy, the cold, and the slow

Article Abstract:

The answer to the long-standing debate over the key determinates of the rate of molecular evolution might lie in a combination of two separate explanation given. A recent article by Gillooly et al (2005) puts up a hypothesis that the factors that speed up or slow down the overall rate of evolution of different species can be combined into a single scaling law that takes into account temperature and body size.

Molecular evolution

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Heritability of progeny size in a terrestrial isopod: Transgenerational environmental effects on a life history trait

Article Abstract:

Maternal effects, the environment that mothers provide to their offspring, their provision of nutrients and the environment that offspring of the same clutch share, are recognized as an important influence on offspring fitness. The changes observed in quantitative genetic parameters in a half-sib design where mothers are fed with varying nutrient content diets, are presented.

Genetic aspects, Mother and infant, Mother-infant relations, Isopoda, Isopods

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Evolution within food webs: the possible and the actual

Article Abstract:

A food web model that includes evolution of individuals and their trophic interactions is analyzed to explore the discrepancy between the actual and possible ecological patterns observed. It is suggested that complex ecological communities rely on the unstable architecture of network interactions leading to the gap in ecological patterns.

Influence, Mutation (Biology), Mutation, Food chains (Ecology), Food chains, Speciation

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