{"id":82172,"date":"2020-04-10T14:00:15","date_gmt":"2020-04-10T18:00:15","guid":{"rendered":"https:\/\/mrnf.gouv.qc.ca\/nos-publications\/drought-timing-local-climate-sensitivity-eastern-temperate-forests-drought\/"},"modified":"2020-04-10T14:00:15","modified_gmt":"2020-04-10T18:00:15","slug":"drought-timing-local-climate-sensitivity-eastern-temperate-forests-drought","status":"publish","type":"cpt_publication","link":"https:\/\/mrnf.gouv.qc.ca\/en\/our-publications\/drought-timing-local-climate-sensitivity-eastern-temperate-forests-drought\/","title":{"rendered":"Drought timing and local climate determine the sensitivity of eastern temperate forests to drought"},"content":{"rendered":"\n<p>Published in <strong>Global Change Biology 24(6): 2339-2351. doi.org\/10.1111\/gcb.14096<\/strong><\/p> <p>Projected changes in temperature and drought regime are likely to reduce carbon (C) storage in forests, thereby amplifying rates of climate change. While such reductions are often presumed to be greatest in semi-arid forests that experience widespread tree mortality, the consequences of drought may also be important in temperate mesic forests of Eastern North America (ENA) if tree growth is significantly curtailed by drought. Investigations of the environmental conditions that determine drought sensitivity are critically needed to accurately predict ecosystem feedbacks to climate change. We matched site factors with the growth responses to drought of 10,753 trees across mesic forests of ENA, representing 24 species and 346 stands, to determine the broad-scale drivers of drought sensitivity for the dominant trees in ENA. Here we show that two factors\u2014the timing of drought, and the atmospheric demand for water (i.e., local potential evapotranspiration; PET)\u2014are stronger drivers of drought sensitivity than soil and stand characteristics. Droughtinduced reductions in tree growth were greatest when the droughts occurred during early-season peaks in radial growth, especially for trees growing in the warmest, driest regions (i.e., highest PET). Further, mean species trait values (rooting depth and w50) were poor predictors of drought sensitivity, as intraspecific variation in sensitivity was equal to or greater than interspecific variation in 17 of 24 species. From a general circulation model ensemble, we find that future increases in earlyseason PET may exacerbate these effects, and potentially offset gains in C uptake and storage in ENA owing to other global change factors.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Published in Global Change Biology 24(6): 2339-2351. doi.org\/10.1111\/gcb.14096 Projected changes in temperature and drought regime are likely to reduce carbon (C) storage in forests, thereby amplifying rates of climate change. While such reductions are often presumed to be greatest in semi-arid forests that experience widespread tree mortality, the consequences of drought may also be important [&hellip;]<\/p>\n","protected":false},"template":"","format":"standard","cptt_secteur":[1179],"cptt_theme":[1183,1185,1184,1180,1181],"cptt_categ_publi":[1149],"cptt_auteurs_ministeriels":[1102],"class_list":["post-82172","cpt_publication","type-cpt_publication","status-publish","format-standard","hentry","cptt_secteur-forests","cptt_theme-ecosystems-and-environment","cptt_theme-forest-ecology","cptt_theme-forest-growth-and-yield-modelling","cptt_theme-forestry-research","cptt_theme-forests","cptt_categ_publi-scientific-article","cptt_auteurs_ministeriels-r-ouimet"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Drought timing and local climate determine the sensitivity of eastern temperate forests to drought - Minist\u00e8re des Ressources naturelles et des For\u00eats<\/title>\n<meta name=\"description\" content=\"Investigations of the environmental conditions that determine drought sensitivity are critically needed to predict ecosystem feedbacks to climate change.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/mrnf.gouv.qc.ca\/en\/our-publications\/drought-timing-local-climate-sensitivity-eastern-temperate-forests-drought\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Drought timing and local climate determine the sensitivity of eastern temperate forests to drought - 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