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Date: | Sun, 22 Nov 2020 13:10:06 -0500 |
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I was recently doing some x-skiing on one of our trails and noticed a few really big hollows in some old pines. It reminded me of a talk I went to by a local biologist on risks to our Yukon Woodpeckers (up here most of the hollows were initially started by them). The point on the topic was how most modern forest management policies (logging or fire smarting) focus on older forests or cleaning out the older larger trees. These practices have been shown to have an impact on most woodpecker populations. In areas with fewer larger woodpeckers (due to loss of habitat), larger owls populations were impacted, followed by small mammals, birds, and insects using these same trees for various purposes.
So I googled to see what the relationships would be between woodpecker (hollows) and wild honey bee colonies in Europe. I did find a few interesting papers on tree hollow densities vs forest types and forest management (managed or not).
"The density of cavities varied widely among forest and management types (Table 1). Coniferous forests had smaller cavity densities than the other forest types. Unmanaged forests had much higher cavity densities than managed forests, independently of the forest type "
https://conbio.onlinelibrary.wiley.com/doi/pdf/10.1111/conl.12693
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