caa a22 4500 46321806X CHVBK 20180405153203.0 cr unu---uuuuu 170326e20070701xx s 000 0 eng 10.1007/s11056-007-9041-z doi (NATIONALLICENCE)springer-10.1007/s11056-007-9041-z Observed dynamics of ponderosa pine ( Pinus ponderosa var. ponderosa Dougl. ex Laws.) seedling recruitment in the Cascade Range, USA [Elektronische Daten] [Christopher Keyes, Douglas Maguire, John Tappeiner] An observational study of early seedling establishment (first 1-2 summers after emergence) was conducted in four ponderosa pine (Pinus ponderosa var. ponderosa Dougl. ex Laws.) stands east of the Cascade Range crest in central Oregon, USA. Newly emerged ponderosa pine seedlings were identified at the start of summer and were monitored through their second summer; a subsequent cohort of seedlings was identified and monitored for one summer. About 3% of the viable seed that was produced resulted in new seedlings. Mortality was substantial immediately following emergence. Most seedlings emerged without shading from understory vegetation, but few survived. Most seedlings alive after one year had emerged beneath live cover; by the end of two summers only shaded seedlings were alive. 63-85% of new seedlings initiated in clusters attributed to rodent caching, and seedlings originating in clusters remained a substantial proportion of the cohort (60%) after two seasons. Results suggest that understory vegetation in these types of stands facilitates the recruitment of ponderosa pine seedlings, most likely by buffering them against environmental stressors during the seedling establishment phase. They also reveal that seed caching rodents are highly active in seed redistribution and can exert a lasting influence on seedling recruitment. Springer Science+Business Media, Inc., 2007 Natural regeneration nationallicence Reproduction nationallicence Establishment nationallicence Understory vegetation nationallicence Seed cache nationallicence Survival nationallicence Keyes Christopher Department of Forestry & Watershed Management, Humboldt State University, 95521, Arcata, CA, USA aut Maguire Douglas Department of Forest Science, Oregon State University, 97331, Corvallis, OR, USA aut Tappeiner John Department of Forest Resources, Oregon State University, 97331, Corvallis, OR, USA aut New Forests Kluwer Academic Publishers 34/1(2007-07-01), 95-105 0169-4286 34:1<95 2007 34 11056 https://doi.org/10.1007/s11056-007-9041-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11056-007-9041-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Keyes Christopher Department of Forestry & Watershed Management, Humboldt State University, 95521, Arcata, CA, USA aut NATIONALLICENCE 700 1- Maguire Douglas Department of Forest Science, Oregon State University, 97331, Corvallis, OR, USA aut NATIONALLICENCE 700 1- Tappeiner John Department of Forest Resources, Oregon State University, 97331, Corvallis, OR, USA aut NATIONALLICENCE 773 0- New Forests Kluwer Academic Publishers 34/1(2007-07-01), 95-105 0169-4286 34:1<95 2007 34 11056 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer