Survival of tanoak (Lithocarpus densiflorus) and Pacific madrone (Arbutus menziesii) seedlings in forests of southwestern Oregon |
| |
Authors: | John C Tappeiner II Philip M McDonald Thomas F Hughes |
| |
Institution: | (1) College of Forestry, Oregon State University, 97331 Corvallis, Oregon, USA;(2) United States Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station, 96001 Redding, California, USA |
| |
Abstract: | Survival of tanoak (Lithocarpus densiflorus) and Pacific madrone (Arbutus menziesii) seedlings was studied in order to interpret succession in conifer hardwood forests and to determine ways to suppress establishment of these species. Seed protected from rodents and birds, and unprotected seed was sown in clearcuts and in conifer stands 40 to 200+ years old. Second-year survival rates of tanoak seedlings were high (50–70%) in exposed clearcuts and conifer stands. Seed predators appear to be of prime importance in limiting tanoak establishment. Survival rates of Pacific madrone seedlings on the same sites as the tanoak were low (0–8%), and many factors caused mortality. Seedlings of both species grew slowly; after 3 years, average tanoak height was only 6.0 to 14.0 cm, average madrone height 2.0 to 6.0 cm. |
| |
Keywords: | seedling survival natural regeneration hardwood ecology competition control |
本文献已被 SpringerLink 等数据库收录! |
|