1. Department of Land , Environment, Agriculture and Forestry (TESAF), , Via dell'Università 16, Legnaro, PD 35020, Italy
2. Università degli Studi di Padova , Environment, Agriculture and Forestry (TESAF), , Via dell'Università 16, Legnaro, PD 35020, Italy
3. Department of Forest Engineering , Resources & Management, , 140 Peavy Forest Science Center, 3100 SW Jefferson Way, Corvallis, OR 97331-5704, United States
4. Oregon State University , Resources & Management, , 140 Peavy Forest Science Center, 3100 SW Jefferson Way, Corvallis, OR 97331-5704, United States
5. Department of Forest and Wood Science, Stellenbosch University , Paul Sauer Building, Bosman St, Stellenbosch Central, Stellenbosch, 7599, South Africa