{"id":4491,"date":"2020-10-12T10:57:30","date_gmt":"2020-10-12T08:57:30","guid":{"rendered":"https:\/\/ist.blogs.inrae.fr\/afs\/?p=4491"},"modified":"2020-10-12T10:57:30","modified_gmt":"2020-10-12T08:57:30","slug":"climate-growth-relationships-for-aspidosperma-tomentosum-mart-in-south-american-tropical-dry-forests","status":"publish","type":"post","link":"https:\/\/ist.blogs.inrae.fr\/afs\/2020\/10\/12\/climate-growth-relationships-for-aspidosperma-tomentosum-mart-in-south-american-tropical-dry-forests\/","title":{"rendered":"Climate-growth relationships for Aspidosperma tomentosum Mart. in South American tropical dry forests"},"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\/Lopez-2020.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-4495 alignleft\" src=\"https:\/\/ist.blogs.inrae.fr\/afs\/wp-content\/uploads\/sites\/5\/2020\/10\/Lopez-2020-242x300.png\" alt=\"\" width=\"242\" height=\"300\" srcset=\"https:\/\/ist.blogs.inrae.fr\/afs\/wp-content\/uploads\/sites\/5\/2020\/10\/Lopez-2020-242x300.png 242w, https:\/\/ist.blogs.inrae.fr\/afs\/wp-content\/uploads\/sites\/5\/2020\/10\/Lopez-2020-768x954.png 768w, https:\/\/ist.blogs.inrae.fr\/afs\/wp-content\/uploads\/sites\/5\/2020\/10\/Lopez-2020-640x795.png 640w, https:\/\/ist.blogs.inrae.fr\/afs\/wp-content\/uploads\/sites\/5\/2020\/10\/Lopez-2020.png 799w\" sizes=\"auto, (max-width: 242px) 100vw, 242px\" \/><\/a>Key message<\/strong><\/p>\n<p style=\"text-align: left\" align=\"justify\">The precise demarcation and cross-dating of tree rings in <em>Aspidosperma tomentosum<\/em> Mart., a valuable timber species in the tropical dry forests of South America, were used to develop the first well-replicated chronology covering the period 1843\u20132015. <em>A. tomentosum<\/em> Mart. tree growth is strongly regulated by soil water availability prior to and during the current growing season. In the context of increased drought severity due to climate change, determining of climate influences on <em>A. tomentosum<\/em> Mart. radial growth is necessary to establish appropriate guidelines for the management, conservation and restoration of this species, currently affected by extreme weather events, extensive fires and deforestation in the Chiquitan\u00eda forests, Bolivia.<\/p>\n<p><strong>Abstract<\/strong><\/p>\n<p align=\"justify\"><strong>Context<\/strong> Tropical forest ecosystems play a critical role in the functioning of the Earth; thus, a better understanding of the influences of climate on tree growth is needed to estimate changes in forest productivity and consequently in carbon sink variations at regional and global scales.<br \/>\n<strong>Aims<\/strong> In the context of global environmental changes, our study aimed at using the growth rings of <em>A. tomentosum<\/em> Mart. to establish the relationships between radial growth and climatic variations.<br \/>\n<strong>Methods<\/strong> The anatomical characterization of the wood elements facilitated the precise annual band delimitation and the rejection of samples with false rings and growth anomalies. A tree-ring chronology was developed using traditional dendrochronological methods and the relationships with climate determined using correlation functions.<br \/>\n<strong>Results<\/strong> The chronology is based on 20 individuals and covers the period 1843\u20132015. Tree-ring statistics indicate an important common signal in growth variations between trees (R-bar = 0.31, EPS = 0.90). Interannual variations in <em>A. tomentosum<\/em> Mart. are directly related to total annual precipitation (r = 0.76) and inversely to mean annual temperature (r = \u2212 0.44). These relationships are similar to those documented for other commercial species (<em>Centrolobium microchaete<\/em>, <em>Schinopsis brasiliensis<\/em>) from tropical dry forests in South America, suggesting a consistent climatic influence on tree growth at a regional scale.<br \/>\n<strong>Conclusion<\/strong> The strong dependence of tree growth on climate variability is a major concern, as climate change scenarios for tropical dry forests in South America predict an increase in the frequency and intensity of droughts, which in turn would reduce the <em>A. tomentosum<\/em> Mart. growth during the twenty-first century.<\/p>\n<p><strong>Keywords<\/strong><br \/>\nDendrochronology; Tree rings; Climate change; Climate-growth relationships; Tropical dry forests; South America<\/p>\n<div class='altmetric-embed' data-badge-type='donut' data-doi='10.1007\/s13595-020-01001-8'  style='float: right; ' ><\/div>\n<p><strong>Publication<\/strong><br \/>\nL\u00f3pez, L., Villalba, R. Climate-growth relationships for <em>Aspidosperma tomentosum<\/em> Mart. in South American tropical dry forests. Annals of Forest Science 77, 96 (2020). <a href=\"https:\/\/doi.org\/10.1007\/s13595-020-01001-8\">https:\/\/doi.org\/10.1007\/s13595-020-01001-8<\/a><\/p>\n<p><strong>For the read-only version of the full text:<\/strong><br \/>\n<a href=\"https:\/\/rdcu.be\/b8oio\">https:\/\/rdcu.be\/b8oio<\/a><\/p>\n<p><strong>Data availability<\/strong><br \/>\nThe datasets generated and\/or analyzed during the current study are available in The International Tree Ring Data Bank repository at the NOAA Paleoclimatology Program, <a href=\"https:\/\/doi.org\/10.25921\/4nqs-t842\">https:\/\/doi.org\/10.25921\/4nqs-t842<\/a> and upon request from the authors (lopez@mendoza-conicet.gob.ar).<\/p>\n<p><strong>Handling Editor<\/strong><br \/>\nCyrille B. K. Rathgeber and Patrick Fonti (Guest Editor)<\/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_8ddbe456d2742a9827c566cb61c8cad9\">Wood formation and tree adaptation to climate<\/a>&#8220;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Key message The precise demarcation and cross-dating of tree rings in Aspidosperma tomentosum Mart., a valuable timber species in the tropical dry forests of South America, were used to develop the first well-replicated chronology covering the period 1843\u20132015. A. tomentosum Mart. tree growth is strongly regulated by soil water availability prior to and during the [&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-4491","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\/4491","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=4491"}],"version-history":[{"count":0,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/posts\/4491\/revisions"}],"wp:attachment":[{"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/media?parent=4491"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/categories?post=4491"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/tags?post=4491"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}