{"id":3378,"date":"2025-09-30T12:20:41","date_gmt":"2025-09-30T12:20:41","guid":{"rendered":"https:\/\/optmix.efno.fr\/?p=3378"},"modified":"2025-10-01T06:48:50","modified_gmt":"2025-10-01T06:48:50","slug":"article-paru-importance-de-lidentite-de-lespece-darbre-du-melange-dessence-et-du-sous-etage-sur-les-stocks-de-carbone-et-dazote-en-peuplements-composes-de-chene-sessile-et-de-pin-sylvestr","status":"publish","type":"post","link":"https:\/\/optmix.efno.fr\/?p=3378","title":{"rendered":"Article paru : Importance de l&rsquo;esp\u00e8ce d&rsquo;arbre, du m\u00e9lange d&rsquo;essence et du sous-\u00e9tage sur les stocks de carbone et d&rsquo;azote en peuplements compos\u00e9s de ch\u00eane sessile et de pin sylvestre"},"content":{"rendered":"<p>Un article vient de para\u00eetre dans la revue \u00ab\u00a0Science of The Total Environment\u00a0\u00bb sur l&rsquo;importance de diff\u00e9rents facteurs sur les stocks de carbone et d&rsquo;azote en for\u00eats compos\u00e9es de ch\u00eane sessile et de pin sylvestre. L&rsquo;importance de l&rsquo;identit\u00e9 de l&rsquo;esp\u00e8ce d&rsquo;arbre, de la composition du peuplement et du sous-\u00e9tage sur ces stocks ont \u00e9t\u00e9 \u00e9valu\u00e9s:<\/p>\n<p>Korboulewsky, N., Javoy, T., P\u00e9rot, T., Ouimet, R., 2025. Importance of species identity, species mixing and understory on carbon and nitrogen stocks in sessile oak and Scots pine stands. Science of The Total Environment 1000, 180410.\u00a0<a href=\"https:\/\/doi.org\/10.1016\/j.scitotenv.2025.180410\" target=\"_blank\" rel=\"noopener\">https:\/\/doi.org\/10.1016\/j.scitotenv.2025.180410<\/a><\/p>\n<p><span style=\"text-decoration: underline;\"><strong>Les points forts :<\/strong><\/span><\/p>\n<ul>\n<li>L&rsquo;identit\u00e9 de l&rsquo;esp\u00e8ce d&rsquo;arbre a un effet plus fort sur les stocks d&rsquo;azote et de carbone que la composition du peuplement ;<\/li>\n<li>L&rsquo;effet de la composition du peuplement est limit\u00e9 ;<\/li>\n<li>Le sous-\u00e9tage contribue entre 29 et 49% aux stocks d&rsquo;azote et de carbone contenus dans la v\u00e9g\u00e9tation ;<\/li>\n<li>La biomasse racinaire est la principale source d&rsquo;incertitude dans l&rsquo;estimation des stocks ;<\/li>\n<li>Le principal d\u00e9fi pour les gestionnaires est de maintenir les stocks plut\u00f4t que de les augmenter.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p><span style=\"text-decoration: underline;\"><strong>R\u00e9sum\u00e9<\/strong> <\/span>:<\/p>\n<div id=\"sp0040\" class=\"u-margin-s-bottom\">Forests contribute the most to the carbon stocks of the terrestrial biosphere. Estimates are available at different scales, though a large degree of uncertainty remains. In particular, the understory is seldom taken into account. In this study, we measured the carbon and nitrogen stocks of all ecosystem compartments, including trees, understory, deadwood, and soil, in pure sessile oak, pure Scots pine and mixed stands of the two species. We studied the importance of different compartment stocks and the effects of stand composition. We also evaluated different sources of uncertainty related to the calculation parameters of the estimates.<\/div>\n<div id=\"sp0045\" class=\"u-margin-s-bottom\">We found that species identity affected ecosystem C and N stocks more than stand composition did. The effects were primarily observed in the forest floor (mainly the organic layer) and the understory. No stand composition effects were observed for either soil C stability or C and N stocks in the mineral horizons, indicating that physicochemical processes dominate. Our results show that the understory can account for more than a quarter of vegetation C stocks and up to one-half of vegetation N stocks in pine low density stands. This importance of the understory was most significant in low-density pure pine stands. The root biomass of the trees and understory vegetation were the primary sources of uncertainty in stock estimations<\/div>\n<div><\/div>\n<p>&nbsp;<\/p>\n<p><strong><span style=\"text-decoration: underline;\">R\u00e9sum\u00e9 graphique :<\/span><\/strong><\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/optmix.efno.fr\/wp-content\/uploads\/2025\/09\/1-s2.0-S0048969725020509-ga1_lrg.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-3383\" src=\"https:\/\/optmix.efno.fr\/wp-content\/uploads\/2025\/09\/1-s2.0-S0048969725020509-ga1_lrg-278x300.jpg\" alt=\"\" width=\"278\" height=\"300\" srcset=\"https:\/\/optmix.efno.fr\/wp-content\/uploads\/2025\/09\/1-s2.0-S0048969725020509-ga1_lrg-278x300.jpg 278w, https:\/\/optmix.efno.fr\/wp-content\/uploads\/2025\/09\/1-s2.0-S0048969725020509-ga1_lrg-948x1024.jpg 948w, https:\/\/optmix.efno.fr\/wp-content\/uploads\/2025\/09\/1-s2.0-S0048969725020509-ga1_lrg-768x829.jpg 768w, https:\/\/optmix.efno.fr\/wp-content\/uploads\/2025\/09\/1-s2.0-S0048969725020509-ga1_lrg-750x810.jpg 750w, https:\/\/optmix.efno.fr\/wp-content\/uploads\/2025\/09\/1-s2.0-S0048969725020509-ga1_lrg.jpg 1005w\" sizes=\"(max-width: 278px) 100vw, 278px\" \/><\/a><\/p>\n<div><\/div>\n<div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Un article vient de para\u00eetre dans la revue \u00ab\u00a0Science of The Total Environment\u00a0\u00bb sur l&rsquo;importance de diff\u00e9rents facteurs sur les stocks de carbone et d&rsquo;azote en for\u00eats compos\u00e9es de ch\u00eane sessile et de pin sylvestre. L&rsquo;importance de l&rsquo;identit\u00e9 de l&rsquo;esp\u00e8ce d&rsquo;arbre, de la composition du peuplement et du sous-\u00e9tage sur ces stocks ont \u00e9t\u00e9 \u00e9valu\u00e9s: &hellip; <\/p>\n<p><a class=\"more-link btn\" href=\"https:\/\/optmix.efno.fr\/?p=3378\">Lire la suite<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/optmix.efno.fr\/index.php?rest_route=\/wp\/v2\/posts\/3378"}],"collection":[{"href":"https:\/\/optmix.efno.fr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/optmix.efno.fr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/optmix.efno.fr\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/optmix.efno.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3378"}],"version-history":[{"count":15,"href":"https:\/\/optmix.efno.fr\/index.php?rest_route=\/wp\/v2\/posts\/3378\/revisions"}],"predecessor-version":[{"id":3401,"href":"https:\/\/optmix.efno.fr\/index.php?rest_route=\/wp\/v2\/posts\/3378\/revisions\/3401"}],"wp:attachment":[{"href":"https:\/\/optmix.efno.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3378"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/optmix.efno.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3378"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/optmix.efno.fr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3378"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}