{"id":4207,"date":"2020-05-27T09:45:46","date_gmt":"2020-05-27T07:45:46","guid":{"rendered":"https:\/\/ist.blogs.inrae.fr\/afs\/?p=4207"},"modified":"2020-05-27T09:45:46","modified_gmt":"2020-05-27T07:45:46","slug":"how-do-social-status-and-tree-architecture-influence-radial-growth-wood-density-and-drought-response-in-spontaneously-established-oak-forests","status":"publish","type":"post","link":"https:\/\/ist.blogs.inrae.fr\/afs\/2020\/05\/27\/how-do-social-status-and-tree-architecture-influence-radial-growth-wood-density-and-drought-response-in-spontaneously-established-oak-forests\/","title":{"rendered":"How do social status and tree architecture influence radial growth, wood density and drought response in spontaneously established oak forests?"},"content":{"rendered":"<script type='text\/javascript' src='https:\/\/d1bxh8uas1mnw7.cloudfront.net\/assets\/embed.js'><\/script><p><strong>Key message<\/strong><\/p>\n<p align=\"justify\">During the past decades, a multitude of oak stands have spontaneously established across the pine-dominated landscapes of the French Landes de Gascogne. Yet their future performance under modern climate change is unknown. We show that coppiced, dominant trees are most prepared to cope with drought episodes, displaying higher basal area increment and lower sensitivity to extreme events.<\/p>\n<p><strong>Abstract<\/strong><\/p>\n<p align=\"justify\"><strong>Context<\/strong> Forest stands dominated by pedunculate oak (<em>Quercus robur<\/em> L.) have spontaneously established across the pine-dominated landscapes of the French Landes de Gascogne. These oak stands are typically unmanaged and unsystematically coppiced, resulting in mixtures of single- and multi-stemmed (coppiced) trees.<br \/>\n<strong>Aims<\/strong> To determine the ability of spontaneous oak forest stands to face climate change\u2013related hazards, by analysing differences in growth (tree-ring width and basal area increment\u2014BAI), wood density and climate sensitivity depending on their tree architecture (single- vs multi-stemmed trees) and their social status in the forest.<br \/>\n<strong>Methods<\/strong> We exhaustively cored 15 oak stands (n\u2009=\u2009657 trees). We compared stand characteristics and climate sensitivity between tree architectures considering two sampling designs, either all sampled trees (the exhaustive sampling) or those with a dominant status (dominant sampling). At the tree level, we used linear mixed effects models to compare wood density and growth between tree architectures and the trees\u2019 social status within the canopy layer (dominant- vs non-dominant trees).<br \/>\n<strong>Results<\/strong> Multi-stemmed trees exhibited higher wood density than single-stemmed trees for diameters &gt;\u200930 cm. Dominant multi-stemmed trees showed lower sensitivity to extreme events (pointer years), higher BAI but lower annual growth rates than dominant single-stemmed trees.<br \/>\n<strong>Conclusion<\/strong> Dominant multi-stemmed trees are potentially the most prepared ones to cope with increasing soil water deficit following drought episodes, at least during the first 60 years of the life of the tree. The vulnerability to face harsher climate conditions for <em>Q. robur<\/em> stands can be misled when using a dominant sampling design.<\/p>\n<p><strong>Keywords<\/strong><br \/>\nDominant trees, Forest expansion, Pointer years, <em>Quercus robur<\/em> L., Single- and multi-stemmed trees, Wood density<\/p>\n<div class='altmetric-embed' data-badge-type='donut' data-doi='10.1007\/s13595-020-00949-x'  style='float: right; ' ><\/div>\n<p><strong>Publication<\/strong><br \/>\nAlfaro-S\u00e1nchez, R., Vald\u00e9s-Correcher, E., Espelta, J.M. et al. How do social status and tree architecture influence radial growth, wood density and drought response in spontaneously established oak forests?. Annals of Forest Science 77, 49 (2020). <a href=\"https:\/\/doi.org\/10.1007\/s13595-020-00949-x\">https:\/\/doi.org\/10.1007\/s13595-020-00949-x<\/a><\/p>\n<p><strong>For the read-only version of the full text:<\/strong><br \/>\n<a href=\"https:\/\/rdcu.be\/b4reW\">https:\/\/rdcu.be\/b4reW<\/a><\/p>\n<p><strong>Data availability<\/strong><br \/>\nThe dataset used in the current study is available in the figshare repository: <a href=\"https:\/\/doi.org\/10.6084\/m9.figshare.11982471\">https:\/\/doi.org\/10.6084\/m9.figshare.11982471<\/a><\/p>\n<p><strong>Topical Collection<\/strong><br \/>\nThis article is part of the Topical Collection &#8220;<a href=\"https:\/\/link.springer.com\/journal\/13595\/topicalCollection\/AC_404bb9a8fc2d99eb2c8a92210ea416f0\"><em>Establishment of second-growth forests in human landscapes: ecological mechanisms and genetic consequences<\/em><\/a>&#8220;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Key message During the past decades, a multitude of oak stands have spontaneously established across the pine-dominated landscapes of the French Landes de Gascogne. Yet their future performance under modern climate change is unknown. We show that coppiced, dominant trees are most prepared to cope with drought episodes, displaying higher basal area increment and lower [&hellip;]<\/p>\n","protected":false},"author":109,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14,110,15,108],"tags":[],"class_list":["post-4207","post","type-post","status-publish","format-standard","hentry","category-article-type","category-data-in-repository","category-research-paper","category-special-issuetopical-collection","cat-14-id","cat-110-id","cat-15-id","cat-108-id"],"_links":{"self":[{"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/posts\/4207","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=4207"}],"version-history":[{"count":0,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/posts\/4207\/revisions"}],"wp:attachment":[{"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/media?parent=4207"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/categories?post=4207"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/tags?post=4207"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}