Seeing the trees for the leaves - oaks are mosaics for a host-specific moth

Article Abstract:

A study to understand how homogenous individual tree crowns are as patches of habitat is presented by partitioning variation in physical and chemical host leaf traits. A large variation is observed in the performance of a specialist moth and in the physical traits of the leaves among different parts of single tree crowns which refutes the theory that an oak tree has an internally homogeneous quality.

Physiological aspects, Oak, Oaks

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Parasitoids on the loose--Experimental lack of support of the parasitoid movement hypothesis

Article Abstract:

An experimental technique is used to remove local population growth from individual movement, defined as the within-generation redistribution of individuals in response to host densities. The results have suggested complex effects of forest fragmentation on parasitoid movement and have warned against broad generalizations from observational studies.

Finland, Population, Host-parasite relationships, Population growth

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An interaction between a specialized seed predator moth and its dioecious host plant shifting from parasitism to mutualism

Article Abstract:

A relationship between a seed predator, the geometrid moth Perizoma affinitatum, and the dioecious plant Silene dioica, is described to study the early stages of evolution towards mutualism. A high pollinating ability and limited seed consumption by the predator was found and discussed in relation to fitness models of P. affinitatum and S. dioica.

Predation (Biology), Mutualism (Biology)

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