
Keywords: پودر; GCNP; Grand Canyon National Park; JUOS; Juniperus osteosperma; NPS; National Park Service; PIED; Pinus edulis; PIPO; Pinus ponderosa; PJ; pinyon-juniper; PJPW; pinyon-juniper persistent woodland; PPF; ponderosa pine forest; QUGA; Quercus gambelii; Pinyon-