{"id":3928,"date":"2020-02-11T15:58:31","date_gmt":"2020-02-11T14:58:31","guid":{"rendered":"https:\/\/ist.blogs.inrae.fr\/afs\/?p=3928"},"modified":"2020-02-11T16:05:02","modified_gmt":"2020-02-11T15:05:02","slug":"assessing-site-form-as-an-indicator-of-site-quality-in-even-aged-pinus-radiata-d-don-stands-in-north-western-spain","status":"publish","type":"post","link":"https:\/\/ist.blogs.inrae.fr\/afs\/2020\/02\/11\/assessing-site-form-as-an-indicator-of-site-quality-in-even-aged-pinus-radiata-d-don-stands-in-north-western-spain\/","title":{"rendered":"Assessing site form as an indicator of site quality in even-aged Pinus radiata D. Don stands in north-western Spain"},"content":{"rendered":"<script type='text\/javascript' src='https:\/\/d1bxh8uas1mnw7.cloudfront.net\/assets\/embed.js'><\/script><div id=\"attachment_3930\" style=\"width: 310px\" class=\"wp-caption alignleft\"><a href=\"https:\/\/ist.blogs.inrae.fr\/afs\/wp-content\/uploads\/sites\/5\/2020\/02\/Molina-Valero-et-al.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-3930\" class=\"size-medium wp-image-3930\" src=\"https:\/\/ist.blogs.inrae.fr\/afs\/wp-content\/uploads\/sites\/5\/2020\/02\/Molina-Valero-et-al-300x300.png\" alt=\"\" width=\"300\" height=\"300\" srcset=\"https:\/\/ist.blogs.inrae.fr\/afs\/wp-content\/uploads\/sites\/5\/2020\/02\/Molina-Valero-et-al-300x300.png 300w, https:\/\/ist.blogs.inrae.fr\/afs\/wp-content\/uploads\/sites\/5\/2020\/02\/Molina-Valero-et-al-150x150.png 150w, https:\/\/ist.blogs.inrae.fr\/afs\/wp-content\/uploads\/sites\/5\/2020\/02\/Molina-Valero-et-al-768x769.png 768w, https:\/\/ist.blogs.inrae.fr\/afs\/wp-content\/uploads\/sites\/5\/2020\/02\/Molina-Valero-et-al-50x50.png 50w, https:\/\/ist.blogs.inrae.fr\/afs\/wp-content\/uploads\/sites\/5\/2020\/02\/Molina-Valero-et-al-640x641.png 640w, https:\/\/ist.blogs.inrae.fr\/afs\/wp-content\/uploads\/sites\/5\/2020\/02\/Molina-Valero-et-al.png 956w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><p id=\"caption-attachment-3930\" class=\"wp-caption-text\">Location of the plots throughout the study area (north-western Spain)<\/p><\/div>\n<p align=\"justify\"><strong>Key message<\/strong> Site form and site index have shown similar precision for estimating site quality in even-aged <em>Pinus radiata<\/em> D. Don stands in north-western Spain. Additionally, SF presents the advantage that it does not require stand age information and can therefore be used in a wider set of situations in the forestry practice.<br \/>\n<strong>Context<\/strong> Estimation of site quality is essential for characterizing, monitoring and predicting forest resources. Site index (i.e. the dominant height of the stand at a reference age) is ordinarily used to estimate site quality; however, this index is only useful for even-aged stands of known age. By contrast, SF is age-independent as it uses the dominant height of the stand at a reference dominant diameter.<br \/>\n<strong>Aims<\/strong> The aim of this study was to compare the performance of SF and SI for site quality estimation in even-aged <em>P. radiata<\/em> stands.<br \/>\n<strong>Methods<\/strong> Dynamic equations derived with the Generalized Algebraic Difference Approach (GADA) from the Hossfeld IV base model were fitted to predict site quality with both SI and SF. SF predictions were compared with SI regarding variability within the same plot and consistency in site quality predictions, using the observed maximum mean annual volume increment (MAI) as a direct measure of site quality.<br \/>\n<strong>Results<\/strong> Both approaches showed good performance in model fitting and provided similar goodness-of-fit statistics and variability in the predictions. However, SI performed slightly stronger when related to MAI.<br \/>\n<strong>Conclusion<\/strong> SF performed adequately in estimating site quality for even-aged P. radiata stands, with results comparable to those obtained using traditional SI.<\/p>\n<p><strong>Keywords<\/strong><br \/>\nSite index, Predicting, Dominant diameter, Dominant height, Stand age<\/p>\n<div class='altmetric-embed' data-badge-type='donut' data-doi='10.1007\/s13595-019-0904-1'  style='float: right; ' ><\/div>\n<p><strong>Open-Access Publication<\/strong><br \/>\nMolina-Valero, J.A., Di\u00e9guez-Aranda, U., \u00c1lvarez-Gonz\u00e1lez, J.G. et al. Annals of Forest Science (2019) 76: 113. <a href=\"https:\/\/doi.org\/10.1007\/s13595-019-0904-1\">https:\/\/doi.org\/10.1007\/s13595-019-0904-1<\/a><\/p>\n<p><strong>Data availability<\/strong><br \/>\nThe datasets generated during and\/or analysed during the current study are available from the corresponding author on reasonable request.<\/p>\n<p><strong>Topical collection<\/strong><br \/>\nFrontiers in Modelling Future Forest Growth, Yield and Wood Properties<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Key message Site form and site index have shown similar precision for estimating site quality in even-aged Pinus radiata D. Don stands in north-western Spain. Additionally, SF presents the advantage that it does not require stand age information and can therefore be used in a wider set of situations in the forestry practice. Context Estimation [&hellip;]<\/p>\n","protected":false},"author":106,"featured_media":3930,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14,109,15,108],"tags":[],"class_list":["post-3928","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-article-type","category-open-access","category-research-paper","category-special-issuetopical-collection","cat-14-id","cat-109-id","cat-15-id","cat-108-id","has_thumb"],"_links":{"self":[{"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/posts\/3928","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\/106"}],"replies":[{"embeddable":true,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/comments?post=3928"}],"version-history":[{"count":0,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/posts\/3928\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/media\/3930"}],"wp:attachment":[{"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/media?parent=3928"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/categories?post=3928"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/tags?post=3928"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}