1. University of Copenhagen, Department of Geosciences and Natural Resource Management, Rolighedsvej 23, 1958 Frederiksberg, Copenhagen, Denmark University of Florida, 110 Newins-Ziegler Hall, Gainesville, FL 32611 Friederike.potash@gmail.com
2. National Park Service, Santa Monica Mountains National Recreation Area, 401 W. Hillcrest Dr., Thousand Oaks, CA 91360
3. University of Copenhagen, Department of Geosciences and Natural Resource Management, Rolighedsvej 23, 1958 Frederiksberg, Copenhagen, Denmark