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Standing at the entrance to the trail we see that the grasses and weeds of the mowed lawn ecosystem are buried under a foot of accumulated snow. If we dig down through the snow we can see that right next to the soil and litter surface there is a space that is a few mm's to several cm's thick. This is the 'subnivean space' and it is important for many of the smaller animals of the trail ecosystem.
Read more about subnivea
Trail entrance in winter

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