{"id":82197,"date":"2019-01-30T12:16:35","date_gmt":"2019-01-30T17:16:35","guid":{"rendered":"https:\/\/mrnf.gouv.qc.ca\/nos-publications\/chronic-ammonium-nitrate-addition-ectomycorrhizal-spruce\/"},"modified":"2019-01-30T12:16:35","modified_gmt":"2019-01-30T17:16:35","slug":"chronic-ammonium-nitrate-addition-ectomycorrhizal-spruce","status":"publish","type":"cpt_publication","link":"https:\/\/mrnf.gouv.qc.ca\/en\/our-publications\/chronic-ammonium-nitrate-addition-ectomycorrhizal-spruce\/","title":{"rendered":"Effect of chronic ammonium nitrate addition on the ectomycorrhizal community in a black spruce stand"},"content":{"rendered":"\n<p>Published in <strong>Canadian Journal of Forest Research 42: 1204-1212. <a href=\"https:\/\/doi.org\/10-1139\/x11-176\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/doi.org\/10-1139\/x11-176<\/a><\/strong><\/p>\n<p>Observed modifications of ectomycorrhizal (ECM) communities have been connected to the increased N depositions of the 20th century. Because of their narrow niche width, small disturbances of soil conditions can produce greater effects on the fungal species than on their host trees. This study investigated the ECM community in a black spruce (<em>Picea mariana<\/em> (Mill.) BSP) stand subjected to long-term additions of 9 and 30 kg N\u00b7ha<sup>\u20131<\/sup>\u00b7year<sup>\u20131<\/sup> of ammonium nitrate, representing 3 and 10 times the atmospheric N deposition at the site, respectively. Root tip vitality and ECM presence were detected on samples collected from the organic horizon and ECM were classified into morphotypes according to their morphological and anatomical characters. In the control, 80.6% of the root tips were vital, 76.5% of them showing ECM colonization. Higher root tip vitality and mycorrhization were observed in the treated plots. Forty-one morphotypes were identified, most of them detected at the higher N inputs. Results diverging from the expectations of a reduction in ECM presence and diversity could be related to a higher growth rate of the trees following fertilization. The repeated application of small N doses could have been a better imitation of natural inputs from atmospheric deposition and could have provided more reliable responses of ECM to treatment.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Published in Canadian Journal of Forest Research 42: 1204-1212. https:\/\/doi.org\/10-1139\/x11-176 Observed modifications of ectomycorrhizal (ECM) communities have been connected to the increased N depositions of the 20th century. Because of their narrow niche width, small disturbances of soil conditions can produce greater effects on the fungal species than on their host trees. This study investigated [&hellip;]<\/p>\n","protected":false},"template":"","format":"standard","cptt_secteur":[1179],"cptt_theme":[1183,1180,1181],"cptt_categ_publi":[1149],"cptt_auteurs_ministeriels":[1091],"class_list":["post-82197","cpt_publication","type-cpt_publication","status-publish","format-standard","hentry","cptt_secteur-forests","cptt_theme-ecosystems-and-environment","cptt_theme-forestry-research","cptt_theme-forests","cptt_categ_publi-scientific-article","cptt_auteurs_ministeriels-d-houle"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Effect of chronic ammonium nitrate addition on the ectomycorrhizal community in a black spruce stand - Minist\u00e8re des Ressources naturelles et des For\u00eats<\/title>\n<meta name=\"description\" content=\"Study on the effects of chronic ammonium nitrate addition on the ectomycorrhizal community in a black spruce stand.\" \/>\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\/chronic-ammonium-nitrate-addition-ectomycorrhizal-spruce\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Effect of chronic ammonium nitrate addition on the ectomycorrhizal community in a black spruce stand - 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