{"id":1469,"date":"2015-08-07T18:06:30","date_gmt":"2015-08-07T16:06:30","guid":{"rendered":"http:\/\/ist.blogs.inra.fr\/afs\/?p=1469"},"modified":"2015-08-07T18:08:14","modified_gmt":"2015-08-07T16:08:14","slug":"xylem-and-soil-co2-fluxes-in-a-quercus-pyrenaica-willd-coppice-root-respiration-increases-with-clonal-size","status":"publish","type":"post","link":"https:\/\/ist.blogs.inrae.fr\/afs\/2015\/08\/07\/xylem-and-soil-co2-fluxes-in-a-quercus-pyrenaica-willd-coppice-root-respiration-increases-with-clonal-size\/","title":{"rendered":"Xylem and soil CO2 fluxes in a Quercus pyrenaica Willd. coppice: root respiration increases with clonal size"},"content":{"rendered":"<script type='text\/javascript' src='https:\/\/d1bxh8uas1mnw7.cloudfront.net\/assets\/embed.js'><\/script><p id=\"Par1\" class=\"Para\" style=\"text-align: justify\"><strong class=\"EmphasisTypeBold\">Xylem and soil CO<\/strong><sub><strong class=\"EmphasisTypeBold\">2<\/strong> <\/sub> <strong class=\"EmphasisTypeBold\">fluxes in coppiced oak forests increase with clonal size, suggesting larger expenditures of energy for root respiration. An imbalance between root demand and shoot production of carbohydrates may contribute to the degradation of abandoned coppices.<\/strong><\/p>\n<h3 class=\"Heading\"><span class=\"EmphasisTypeBoldItalic\">Abstract<br \/>\n<\/span><\/h3>\n<p id=\"Par5\" class=\"Para\" style=\"text-align: justify\">Our understanding of root respiration is limited, particularly in root-resprouting species with many stems and a large system of interconnected roots resulting from long-term coppicing. We tested the hypothesis that clone size influences the internal flux of CO<sub>2<\/sub> dissolved in xylem sap (<em class=\"EmphasisTypeItalic\">F<\/em> <sub>T<\/sub>) from roots into the stem and soil CO<sub>2<\/sub> efflux (<em class=\"EmphasisTypeItalic\">F<\/em> <sub>S<\/sub>) as indicators of root respiration. We predicted that large clones would exhibit higher <em class=\"EmphasisTypeItalic\">F<\/em> <sub>T<\/sub> per stem and <em class=\"EmphasisTypeItalic\">F<\/em> <sub>S<\/sub> than small clones due to larger root system per stem in large clones. Genetic analyses were performed to elucidate clonal grouping. <em class=\"EmphasisTypeItalic\">F<\/em> <sub>T<\/sub> was measured continuously for 100\u00a0days in 16 similar-sized stems of <em class=\"EmphasisTypeItalic\">Quercus pyrenaica<\/em> belonging to two large and two small clones. <em class=\"EmphasisTypeItalic\">F<\/em> <sub>S<\/sub> was measured in 20 clones of varying size. <em class=\"EmphasisTypeItalic\">F<\/em> <sub>T<\/sub> per stem and <em class=\"EmphasisTypeItalic\">F<\/em> <sub>S<\/sub> were higher in large clones. <em class=\"EmphasisTypeItalic\">F<\/em> <sub>T<\/sub> was 2\u00a0% of the root-respired CO<sub>2<\/sub> that diffused through soil to the atmosphere.<\/p>\n<p id=\"Par6\" class=\"Para\" style=\"text-align: justify\">Relative to other studies, the contribution of <em class=\"EmphasisTypeItalic\">F<\/em> <sub>T<\/sub> to root respiration was very low, pointing to large differences depending on species or site. Higher stem <em class=\"EmphasisTypeItalic\">F<\/em> <sub>T<\/sub> and <em class=\"EmphasisTypeItalic\">F<\/em> <sub>S<\/sub> in large clones compared with small clones suggest greater carbon consumption by roots in large clones, pointing to a root\/shoot biomass and physiological imbalance resulting from long-term coppicing that would partially explain the degradation of currently abandoned stands of <em class=\"EmphasisTypeItalic\">Q. pyrenaica<\/em>.<\/p>\n<div class='altmetric-embed' data-badge-type='donut' data-doi='10.1007\/s13595-015-0504-7'  style='float: right; ' ><\/div>\n<p><em>Publication<\/em><\/p>\n<p style=\"text-align: justify\">Salom\u00f3n R, Valbuena-Caraba\u00f1a M, Rodr\u00edguez-Calcerrada J, Aubrey D, McGuire M, Teskey R, Gil L, Gonz\u00e1lez-Doncel I 2015. Xylem and soil CO2 fluxes in a <em>Quercus pyrenaica<\/em> Willd. coppice: root respiration increases with clonal size. Ann. For. Sci.: 1-14. 10.1007\/s13595-015-0504-7.<\/p>\n<p><a href=\"http:\/\/link.springer.com\/article\/10.1007\/s13595-015-0504-7#\">Read the full paper<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Xylem and soil CO2 fluxes in coppiced oak forests increase with clonal size, suggesting larger expenditures of energy for root respiration. An imbalance between root demand and shoot production of carbohydrates may contribute to the degradation of abandoned coppices. Abstract Our understanding of root respiration is limited, particularly in root-resprouting species with many stems and [&hellip;]<\/p>\n","protected":false},"author":35,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[15],"tags":[],"class_list":["post-1469","post","type-post","status-publish","format-standard","hentry","category-research-paper","cat-15-id"],"_links":{"self":[{"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/posts\/1469","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\/35"}],"replies":[{"embeddable":true,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/comments?post=1469"}],"version-history":[{"count":0,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/posts\/1469\/revisions"}],"wp:attachment":[{"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/media?parent=1469"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/categories?post=1469"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/tags?post=1469"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}