{"id":82328,"date":"2019-01-30T12:17:55","date_gmt":"2019-01-30T17:17:55","guid":{"rendered":"https:\/\/mrnf.gouv.qc.ca\/nos-publications\/ground-layer-composition\/"},"modified":"2019-01-30T12:17:55","modified_gmt":"2019-01-30T17:17:55","slug":"ground-layer-composition","status":"publish","type":"cpt_publication","link":"https:\/\/mrnf.gouv.qc.ca\/en\/our-publications\/ground-layer-composition\/","title":{"rendered":"Ground-layer composition may limit the positive impact of precommercial thinning on boreal stand productivity"},"content":{"rendered":"\n

Published in Forest Science 63(6): 559-568 https:\/\/doi.org\/10.5849\/FS-2017-062R2<\/a><\/strong><\/p>\n

In the boreal forest, ground-layer composition may modulate the effects of precommercial thinning (PCT) on stand productivity by affecting tree growth conditions. Based on data from 15 years of PCT monitoring in black spruce (Picea mariana<\/em>) and jack pine (Pinus banksiana<\/em>) stands, the objectives of this study were to investigate the effects of PCT on ground-layer composition and the way ground-layer composition is related to tree growth, stand productivity, and the PCT impact on stand productivity. PCT favored lichen expansion in xeric sites. The positive impact of PCT on stand productivity after 15 years was lower in sites with high year-one lichen cover, suggesting that the aboveground positive effect of PCT on growth may have been mitigated by a belowground negative feedback resulting from lichen expansion in xeric sites. Although Sphagnum spp. cover was not affected by PCT, 15-year increase in stand productivity was lower in sites with high year-one Sphagnum <\/em>spp. cover. These results suggest that xeric stands with high lichen cover should not be targeted for PCT because of either null or negative effects on stand productivity. Subhydric stands with high Sphagnum <\/em>spp. cover should also be avoided because of lower potential stand productivity.<\/p>\n","protected":false},"excerpt":{"rendered":"

Published in Forest Science 63(6): 559-568 https:\/\/doi.org\/10.5849\/FS-2017-062R2 In the boreal forest, ground-layer composition may modulate the effects of precommercial thinning (PCT) on stand productivity by affecting tree growth conditions. Based on data from 15 years of PCT monitoring in black spruce (Picea mariana) and jack pine (Pinus banksiana) stands, the objectives of this study were […]<\/p>\n","protected":false},"template":"","format":"standard","cptt_secteur":[1179],"cptt_theme":[1185,1180,1181,1182],"cptt_categ_publi":[1149],"cptt_auteurs_ministeriels":[1067],"class_list":["post-82328","cpt_publication","type-cpt_publication","status-publish","format-standard","hentry","cptt_secteur-forests","cptt_theme-forest-ecology","cptt_theme-forestry-research","cptt_theme-forests","cptt_theme-silviculture","cptt_categ_publi-scientific-article","cptt_auteurs_ministeriels-m-barrette"],"acf":[],"yoast_head":"\nGround-layer composition may limit the positive impact of precommercial thinning on boreal stand productivity - Minist\u00e8re des Ressources naturelles et des For\u00eats<\/title>\n<meta name=\"description\" content=\"Ground-layer composition may modulate the effects of precommercial thinning (PCT) on stand productivity by affecting tree growth conditions.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/mrnf.gouv.qc.ca\/en\/our-publications\/ground-layer-composition\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ground-layer composition may limit the positive impact of precommercial thinning on boreal stand productivity - 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