In one of our study plots in Rosedale Valley, 90% of the woody stems were identified as Norway maple, one of the most invasive species in North America. (Read more about this species from our previous article: Norway Maple (Acer platanoides): when street trees break bad.)
On the other hand, we have also found some big old oaks that are producing large amount of acorns, but we haven’t seen too many young oaks in the ravines. Why aren’t they regenerating? Is there any other reason besides the squirrels and Norway maples? Our team is starting seed forecasting on these oaks. Fall is about to start, the oaks are ready to help us revitalize the ravines, and vice versa.