As the days lengthen and carry us toward spring, the pattern of 6-foot-plus morning tides and afternoon daylight minus tides also continues. The full moon that rises on Wednesday, Feb. 12, is known as the “alder moon” in the Celtic tree calendar. Water-loving alders are easily spotted along the Bear Valley and Earthquake Trails, with their light-colored bark. Alder roots have long been used by Coast Miwok for basketmaking and the bark gathered for medicinal…