2026-04-26T20:21:58Zhttps://uvadoc.uva.es/oai/request

oai:uvadoc.uva.es:10324/76602025-01-10T10:25:20Zcom_10324_7492com_10324_952com_10324_894col_10324_7493

00925njm 22002777a 4500 dc Rodríguez García, Encarna author Ordoñez Alonso, Ángel Cristobal author Bravo Oviedo, Felipe author 2011 Shrubs are recognized as important tree regeneration niches. In this study, we experimentally analysed the effects of shrub presence, canopy cover (closed cover and open cover-gaps), and seedling size on Pinus pinaster growth. Objective We expected that (1) seedling–shrub interaction would depend on seedling size and would shift from positive to negative with increasing size; (2) overstorey canopy would affect seedling–shrub interaction, with stronger and positive interactions in gaps, and (3) microsite factors would be affected by vegetation. Social status and plant size appeared to determine the post-shrub-treatment growth response. Results The effect of shrub on seedling growth varied with the canopy cover. Under closed canopy, there was a shift from a positive net effect on smaller seedlings to a negative net effect on mid-size seedlings, and then back to a positive net effect on larger seedling response. Under open canopy, a negative net effect was observed, with no change in the sign of the interaction as seedling size increased. Microenvironmental conditions varied in relation to overstorey and understorey vegetation, while soil conditions varied in relation to overstorey. The seedling–shrub interaction had both positive and negative net effects, which could help define the natural regeneration dynamic of P. pinaster. Annals of Forest Science (2011) 68: 337–346 1297-966X http://uvadoc.uva.es/handle/10324/7660 Pinos-Crecimiento Effects of shrub and canopy cover on the relative growth rate (RGR) of Pinus pinaster seedlings of different sizes