biological survey

Crown‐mapping involves measurements of heights, diameters, distances, and azimuths of all branches. Here Jim Spickler (left) extends a steel tape to measure the horizontal extension of a dead branch while Bob Van Pelt (right) records the measurement. Photo by Stephen Sillett, Institute for Redwood Ecology, Humboldt State University

Countdown to BioBlitz!

by Deborah Zierten on

In 21 days we will have a major scientific event happening throughout the Bay Area: the 2014 National Park Service BioBlitz. Here at the League we are busy preparing for this 24-hour exploration of the ecologically diverse areas of the …