Collins New Naturalist Library (117) – Plant Galls by Redfern Margaret

Author:Redfern, Margaret [Redfern, Margaret]
Language: eng
Format: epub
Publisher: Harper Collins, Inc.
Published: 2011-04-27T23:00:00+00:00

GALL MIDGE GALLS

Communities in cecidomyiid galls vary in complexity and, as in other galls, consist of parasitoids, predators, inquilines and caterpillar herbivores, with roles that often overlap and merge. They may start as true parasitoids of the gall causer, then attack other inhabitants of the gall so behaving more like predators, before becoming inquilinous, feeding on the gall tissue. A few parasitoids are endoparasitic and highly specific to a particular gall midge species, but most are less specific and are ectoparasitoids. The fungi of ambrosia galls provide another potential food source for their inhabitants. Figs 184, 190, 191 and 195 show the food webs of a range of gall midges. The community in Taxomyia taxi galls is particularly simple compared to that of the birch gall midges Massalongia and, particularly, Semudobia. Asphondylia gall communities are less complex too despite, or perhaps because of, the presence of the ambrosia fungus.

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