On Saturday, October 15th at 4 pm, the Friends of San Pedro Valley Park welcome back Tom Parker, Professor of Biology, Emeritus, San Francisco State University for his presentation entitled, "Manzanitas as a whole ecosystem; their place in the ecology of California."  Tom tells us: "While I’ve given a few talks on manzanitas, I’ve been impressed by how they seem to be the center of a lot of interconnected interactions. I’ll use this talk to pull all those previous ideas together…