The Caddo Canyons are a nice example of the effect of topography on vegetation. The canyons support eastern deciduous forest - the southwesternmost extension of this biome, but once you emerge from the canyons you are back in the prairie.
The wet weather is probably responsible for the extent of the horsetails on [...]
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Black walnuts are supposed to be classic cases on allelopathy. Yet there is nothing in these “Caddo” black walnuts that really says “allelopathy” very strongly. Many trees had close neighbours, and several of them had Virginia Creeper growing on them. Not exactly what I would expect of an allelopathic tree. [...]
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On Friday I went out to one of the Caddo canyons with T.H. Milby and George Geissler (a state forester) to core black walnut trees that are parent trees in T.H.’s study.
The last time I did any tree-coring it was some of Lissa’s Austrian Pines at Saugatuck Dunes State Park. That was [...]
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