Shadblow Leaf Ecology


Here are some shadblow (Amelanchier canadensis) or serviceberry leaves that I collected from my yard this past Fall. Their tattered appearance speaks of the heavy use that the local ecology has made of them. Not only did they provide sugars for the mother shadbush, but insects and perhaps other arthropods (such as mites or spiders) have used them for food and habitat.

1. Each leaf is spotted with many skeletonized areas. There appear to be two sets of skeletonizations. One set has light-colored edges, the other has dark-colored edges. Anyone have an explanation?

2. There’s a tiny web of silk on one of the leaves. Who made it?

3. Stuck in the silk are some small dark objects. Are these frass (insect detritus) from the maker of the silk?

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