{"id":81956,"date":"2019-01-30T12:14:55","date_gmt":"2019-01-30T17:14:55","guid":{"rendered":"https:\/\/mrnf.gouv.qc.ca\/nos-publications\/simple-stem-taper-model\/"},"modified":"2019-01-30T12:14:55","modified_gmt":"2019-01-30T17:14:55","slug":"simple-stem-taper-model","status":"publish","type":"cpt_publication","link":"https:\/\/mrnf.gouv.qc.ca\/en\/our-publications\/simple-stem-taper-model\/","title":{"rendered":"A simple stem taper model with mixed effects for boreal black spruce"},"content":{"rendered":"\n<p>Published in <strong>European Journal of Forest Research 128(5): 505-513<\/strong><\/p>\n<p>We simplified Kozak&#8217;s taper model by setting the inflection point at 1.3 m (dbh) without losing accuracy and precision. The simplification was required to facilitate the estimation of the covariance parameters when using a mixed-effects method. This method was necessary to take into account the correlation among multiple diameter measurements on an individual stem. The simple stem taper model was fitted to an extended data set collected across the province of Qu\u00e9bec, Canada. Comparison of the predicted stem taper and the derived stem volume with those obtained using existing models showed a comparable predictive power for the simple model. Including a prediction of the tree random effects based on supplementary diameter measurements of the bole improves the predictive ability of the model around the extra diameter observation. This model offers welcome simplicity as a means of predicting tree taper at coarse resolution for planning tree harvesting.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Published in European Journal of Forest Research 128(5): 505-513 We simplified Kozak&#8217;s taper model by setting the inflection point at 1.3 m (dbh) without losing accuracy and precision. The simplification was required to facilitate the estimation of the covariance parameters when using a mixed-effects method. This method was necessary to take into account the correlation [&hellip;]<\/p>\n","protected":false},"template":"","format":"standard","cptt_secteur":[1179],"cptt_theme":[1180,1181,1182],"cptt_categ_publi":[1149],"cptt_auteurs_ministeriels":[1092],"class_list":["post-81956","cpt_publication","type-cpt_publication","status-publish","format-standard","hentry","cptt_secteur-forests","cptt_theme-forestry-research","cptt_theme-forests","cptt_theme-silviculture","cptt_categ_publi-scientific-article","cptt_auteurs_ministeriels-m-c-lambert"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>A simple stem taper model with mixed effects for boreal black spruce - Minist\u00e8re des Ressources naturelles et des For\u00eats<\/title>\n<meta name=\"description\" content=\"We simplified Kozak&#039;s taper model by setting the inflection point at 1.3 m (dbh) without losing accuracy and precision.\" \/>\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\/simple-stem-taper-model\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"A simple stem taper model with mixed effects for boreal black spruce - Minist\u00e8re des Ressources naturelles et des For\u00eats\" \/>\n<meta property=\"og:description\" content=\"We simplified Kozak&#039;s taper model by setting the inflection point at 1.3 m (dbh) without losing accuracy and precision.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/mrnf.gouv.qc.ca\/en\/our-publications\/simple-stem-taper-model\/\" \/>\n<meta property=\"og:site_name\" content=\"Minist\u00e8re des Ressources naturelles et des For\u00eats\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/RessourcesNaturellesForets\/\" \/>\n<meta property=\"og:image\" content=\"\/wp-content\/uploads\/Image-g%c3%a9n%c3%a9rale-hiver_FB.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"630\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:site\" content=\"@mrnfqc\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/mrnf.gouv.qc.ca\/en\/our-publications\/simple-stem-taper-model\/\",\"url\":\"https:\/\/mrnf.gouv.qc.ca\/en\/our-publications\/simple-stem-taper-model\/\",\"name\":\"A simple stem taper model with mixed effects for boreal black spruce - Minist\u00e8re des Ressources naturelles et des For\u00eats\",\"isPartOf\":{\"@id\":\"https:\/\/mrnf.gouv.qc.ca\/#website\"},\"datePublished\":\"2019-01-30T17:14:55+00:00\",\"description\":\"We simplified Kozak's taper model by setting the inflection point at 1.3 m (dbh) without losing accuracy and precision.\",\"breadcrumb\":{\"@id\":\"https:\/\/mrnf.gouv.qc.ca\/en\/our-publications\/simple-stem-taper-model\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/mrnf.gouv.qc.ca\/en\/our-publications\/simple-stem-taper-model\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/mrnf.gouv.qc.ca\/en\/our-publications\/simple-stem-taper-model\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Accueil\",\"item\":\"https:\/\/mrnf.gouv.qc.ca\/en\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Publications\",\"item\":\"https:\/\/mrnf.gouv.qc.ca\/nos-publications\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"A simple stem taper model with mixed effects for boreal black spruce\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/mrnf.gouv.qc.ca\/#website\",\"url\":\"https:\/\/mrnf.gouv.qc.ca\/\",\"name\":\"Minist\u00e8re des Ressources naturelles et des For\u00eats\",\"description\":\"Prototype WordPress\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/mrnf.gouv.qc.ca\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"A simple stem taper model with mixed effects for boreal black spruce - Minist\u00e8re des Ressources naturelles et des For\u00eats","description":"We simplified Kozak's taper model by setting the inflection point at 1.3 m (dbh) without losing accuracy and precision.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/mrnf.gouv.qc.ca\/en\/our-publications\/simple-stem-taper-model\/","og_locale":"en_US","og_type":"article","og_title":"A simple stem taper model with mixed effects for boreal black spruce - Minist\u00e8re des Ressources naturelles et des For\u00eats","og_description":"We simplified Kozak's taper model by setting the inflection point at 1.3 m (dbh) without losing accuracy and precision.","og_url":"https:\/\/mrnf.gouv.qc.ca\/en\/our-publications\/simple-stem-taper-model\/","og_site_name":"Minist\u00e8re des Ressources naturelles et des For\u00eats","article_publisher":"https:\/\/www.facebook.com\/RessourcesNaturellesForets\/","og_image":[{"width":1200,"height":630,"url":"\/wp-content\/uploads\/Image-g%c3%a9n%c3%a9rale-hiver_FB.jpg","type":"image\/jpeg"}],"twitter_card":"summary_large_image","twitter_site":"@mrnfqc","twitter_misc":{"Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/mrnf.gouv.qc.ca\/en\/our-publications\/simple-stem-taper-model\/","url":"https:\/\/mrnf.gouv.qc.ca\/en\/our-publications\/simple-stem-taper-model\/","name":"A simple stem taper model with mixed effects for boreal black spruce - Minist\u00e8re des Ressources naturelles et des For\u00eats","isPartOf":{"@id":"https:\/\/mrnf.gouv.qc.ca\/#website"},"datePublished":"2019-01-30T17:14:55+00:00","description":"We simplified Kozak's taper model by setting the inflection point at 1.3 m (dbh) without losing accuracy and precision.","breadcrumb":{"@id":"https:\/\/mrnf.gouv.qc.ca\/en\/our-publications\/simple-stem-taper-model\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/mrnf.gouv.qc.ca\/en\/our-publications\/simple-stem-taper-model\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/mrnf.gouv.qc.ca\/en\/our-publications\/simple-stem-taper-model\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Accueil","item":"https:\/\/mrnf.gouv.qc.ca\/en\/"},{"@type":"ListItem","position":2,"name":"Publications","item":"https:\/\/mrnf.gouv.qc.ca\/nos-publications\/"},{"@type":"ListItem","position":3,"name":"A simple stem taper model with mixed effects for boreal black spruce"}]},{"@type":"WebSite","@id":"https:\/\/mrnf.gouv.qc.ca\/#website","url":"https:\/\/mrnf.gouv.qc.ca\/","name":"Minist\u00e8re des Ressources naturelles et des For\u00eats","description":"Prototype WordPress","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/mrnf.gouv.qc.ca\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"}]}},"_links":{"self":[{"href":"https:\/\/mrnf.gouv.qc.ca\/en\/wp-json\/wp\/v2\/cpt_publication\/81956","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mrnf.gouv.qc.ca\/en\/wp-json\/wp\/v2\/cpt_publication"}],"about":[{"href":"https:\/\/mrnf.gouv.qc.ca\/en\/wp-json\/wp\/v2\/types\/cpt_publication"}],"version-history":[{"count":0,"href":"https:\/\/mrnf.gouv.qc.ca\/en\/wp-json\/wp\/v2\/cpt_publication\/81956\/revisions"}],"wp:attachment":[{"href":"https:\/\/mrnf.gouv.qc.ca\/en\/wp-json\/wp\/v2\/media?parent=81956"}],"wp:term":[{"taxonomy":"cptt_secteur","embeddable":true,"href":"https:\/\/mrnf.gouv.qc.ca\/en\/wp-json\/wp\/v2\/cptt_secteur?post=81956"},{"taxonomy":"cptt_theme","embeddable":true,"href":"https:\/\/mrnf.gouv.qc.ca\/en\/wp-json\/wp\/v2\/cptt_theme?post=81956"},{"taxonomy":"cptt_categ_publi","embeddable":true,"href":"https:\/\/mrnf.gouv.qc.ca\/en\/wp-json\/wp\/v2\/cptt_categ_publi?post=81956"},{"taxonomy":"cptt_auteurs_ministeriels","embeddable":true,"href":"https:\/\/mrnf.gouv.qc.ca\/en\/wp-json\/wp\/v2\/cptt_auteurs_ministeriels?post=81956"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}