{"id":4533,"date":"2020-10-27T09:55:11","date_gmt":"2020-10-27T08:55:11","guid":{"rendered":"https:\/\/ist.blogs.inrae.fr\/afs\/?p=4533"},"modified":"2020-10-27T09:55:11","modified_gmt":"2020-10-27T08:55:11","slug":"improving-aboveground-biomass-estimates-by-taking-into-account-density-variations-between-tree-components","status":"publish","type":"post","link":"https:\/\/ist.blogs.inrae.fr\/afs\/2020\/10\/27\/improving-aboveground-biomass-estimates-by-taking-into-account-density-variations-between-tree-components\/","title":{"rendered":"Improving aboveground biomass estimates by taking into account density variations between tree components"},"content":{"rendered":"<script type='text\/javascript' src='https:\/\/d1bxh8uas1mnw7.cloudfront.net\/assets\/embed.js'><\/script><p><strong><a href=\"https:\/\/ist.blogs.inrae.fr\/afs\/wp-content\/uploads\/sites\/5\/2020\/10\/Billard2020.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-4536 alignright\" src=\"https:\/\/ist.blogs.inrae.fr\/afs\/wp-content\/uploads\/sites\/5\/2020\/10\/Billard2020-300x205.png\" alt=\"\" width=\"300\" height=\"205\" srcset=\"https:\/\/ist.blogs.inrae.fr\/afs\/wp-content\/uploads\/sites\/5\/2020\/10\/Billard2020-300x205.png 300w, https:\/\/ist.blogs.inrae.fr\/afs\/wp-content\/uploads\/sites\/5\/2020\/10\/Billard2020-768x525.png 768w, https:\/\/ist.blogs.inrae.fr\/afs\/wp-content\/uploads\/sites\/5\/2020\/10\/Billard2020-640x438.png 640w, https:\/\/ist.blogs.inrae.fr\/afs\/wp-content\/uploads\/sites\/5\/2020\/10\/Billard2020.png 778w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a>Key message<\/strong><br \/>\nStrong density differences were observed between stem wood at 1.30 m and other tree components (stem wood, stem bark, knots, branch stumps and branches). The difference, up to 40% depending on the component, should be taken into account when estimating the biomass available for industrial uses, mainly fuelwood and wood for chemistry.<\/p>\n<p><strong>Abstract<\/strong><\/p>\n<p align=\"justify\"><strong>Context<\/strong> Basic density is a major variable in the calculation of tree biomass. However, it is usually measured on stem wood only and at breast height.<br \/>\n<strong>Aims<\/strong> The objectives of this study were to compare basic density of stem wood at 1.30 m with other tree components and assess the impact of differences on biomass.<br \/>\n<strong>Methods<\/strong> Three softwood species were studied: <em>Abies alba<\/em> Mill., <em>Picea abies<\/em> (L.) H. Karst., <em>Pseudotsuga menziesii<\/em> (Mirb.) Franco. X-Ray computed tomography was used to measure density.<br \/>\n<strong>Results<\/strong> Large differences were observed between components. Basic density of components was little influenced by tree size and stand density. Overall, bark, knot and branch biomasses were highly underestimated by using basic density measured at 1.30 m.<br \/>\n<strong>Conclusion<\/strong> Using available wood density databases mainly based on breast height measurements would lead to important biases (up to more than 40%) on biomass estimates for some tree components. Further work is necessary to complete available databases.<\/p>\n<p><strong>Keywords<\/strong><br \/>\nWood specific gravity; Bark; Knots; Branches; Softwoods<\/p>\n<div class='altmetric-embed' data-badge-type='donut' data-doi='10.1007\/s13595-020-00999-1'  style='float: right; ' ><\/div>\n<p><strong>Publication<\/strong><br \/>\nBillard, A., Bauer, R., Mothe, F. et al. Improving aboveground biomass estimates by taking into account density variations between tree components. Annals of Forest Science 77, 103 (2020). <a href=\"https:\/\/doi.org\/10.1007\/s13595-020-00999-1\">https:\/\/doi.org\/10.1007\/s13595-020-00999-1<\/a><\/p>\n<p><strong>For the read-only version of the full text:<\/strong><br \/>\n<a href=\"https:\/\/rdcu.be\/b9f4P\">https:\/\/rdcu.be\/b9f4P<\/a><\/p>\n<p><strong>Handling Editor<\/strong><br \/>\nLeo Liu<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Key message Strong density differences were observed between stem wood at 1.30 m and other tree components (stem wood, stem bark, knots, branch stumps and branches). The difference, up to 40% depending on the component, should be taken into account when estimating the biomass available for industrial uses, mainly fuelwood and wood for chemistry. Abstract [&hellip;]<\/p>\n","protected":false},"author":109,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14,15],"tags":[],"class_list":["post-4533","post","type-post","status-publish","format-standard","hentry","category-article-type","category-research-paper","cat-14-id","cat-15-id"],"_links":{"self":[{"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/posts\/4533","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/users\/109"}],"replies":[{"embeddable":true,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/comments?post=4533"}],"version-history":[{"count":0,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/posts\/4533\/revisions"}],"wp:attachment":[{"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/media?parent=4533"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/categories?post=4533"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/tags?post=4533"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}