{"id":172,"date":"2014-08-18T09:52:11","date_gmt":"2014-08-18T13:52:11","guid":{"rendered":"http:\/\/www.frfce.qc.ca\/?page_id=172"},"modified":"2014-08-25T15:15:44","modified_gmt":"2014-08-25T19:15:44","slug":"etude-de-la-distribution-du-nerprun-bourdaine-en-peuplements-naturels","status":"publish","type":"page","link":"https:\/\/www.frfce.qc.ca\/?page_id=172","title":{"rendered":"\u00c9tude de la distribution du nerprun bourdaine en peuplements naturels"},"content":{"rendered":"<p><strong>Mise en contexte<\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignright wp-image-138 size-full\" src=\"http:\/\/www.frfce.qc.ca\/wp-content\/uploads\/2014\/08\/nerprun_bourdaine1.png\" alt=\"nerprun bourdaine\" width=\"200\" height=\"200\" srcset=\"https:\/\/www.frfce.qc.ca\/wp-content\/uploads\/2014\/08\/nerprun_bourdaine1.png 200w, https:\/\/www.frfce.qc.ca\/wp-content\/uploads\/2014\/08\/nerprun_bourdaine1-150x150.png 150w, https:\/\/www.frfce.qc.ca\/wp-content\/uploads\/2014\/08\/nerprun_bourdaine1-50x50.png 50w\" sizes=\"auto, (max-width: 200px) 100vw, 200px\" \/><\/p>\n<p>Le nerprun bourdaine est une esp\u00e8ce arbustive exotique, originaire d\u2019Europe et d\u2019Asie. Elle a \u00e9t\u00e9 introduite en Am\u00e9rique du Nord aux premiers temps de la colonisation, mais ce n\u2019est qu\u2019\u00e0 la toute fin des ann\u00e9es 1800 que les premi\u00e8res observations en nature sont faites en Ontario. En l\u2019espace d\u2019\u00e0 peine un si\u00e8cle, le nerprun bourdaine s\u2019est propag\u00e9 si efficacement qu\u2019il est aujourd\u2019hui consid\u00e9r\u00e9 comme une r\u00e9elle menace pour la biodiversit\u00e9 et la production foresti\u00e8re. Sa croissance rapide, sa tol\u00e9rance \u00e0 l\u2019ombre, sa capacit\u00e9 de reproduction v\u00e9g\u00e9tative par marcottage et son affinit\u00e9 pour les milieux autant secs qu\u2019humides font du nerprun une des pires esp\u00e8ces exotiques envahissantes au Qu\u00e9bec. De plus, chaque individu produit de nombreux fruits qui sont consomm\u00e9s par plusieurs oiseaux et mammif\u00e8res, une situation qui contribue \u00e0 la dispersion rapide des graines de nerprun. Les graines du nerprun ont un taux de germination exceptionnel (plus de 90 %). Une fois bien \u00e9tabli, le nerprun peut former des fourr\u00e9es arbustives denses qui bloquent la lumi\u00e8re pour les semis des esp\u00e8ces foresti\u00e8res.<\/p>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-404 size-full\" src=\"http:\/\/www.frfce.qc.ca\/wp-content\/uploads\/2014\/08\/marcottage.jpg\" alt=\"Marcottage du nerprun bourdaine\" width=\"200\" height=\"200\" srcset=\"https:\/\/www.frfce.qc.ca\/wp-content\/uploads\/2014\/08\/marcottage.jpg 200w, https:\/\/www.frfce.qc.ca\/wp-content\/uploads\/2014\/08\/marcottage-150x150.jpg 150w, https:\/\/www.frfce.qc.ca\/wp-content\/uploads\/2014\/08\/marcottage-50x50.jpg 50w\" sizes=\"auto, (max-width: 200px) 100vw, 200px\" \/>Ainsi, la pr\u00e9sence grandissant du nerprun dans le sud de la province fait en sorte qu\u2019il pourrait nuire \u00e0 la r\u00e9g\u00e9n\u00e9ration naturelle en for\u00eat, mais \u00e9galement miner les efforts d\u2019enrichissement dans les peuplements d\u00e9grad\u00e9s et les plantations envahies par le nerprun. Se d\u00e9barrasser du nerprun est \u00e9galement un casse-t\u00eate pour les am\u00e9nagistes qui ont identifi\u00e9 la lutte chimique (phytocide) comme le seul moyen vraiment efficace pour contrer l\u2019envahisseur. Cette situation alarmante a motiv\u00e9 la tenue d\u2019une \u00e9tude afin de tenter de d\u00e9terminer l\u2019habitat pr\u00e9f\u00e9rentiel de cette esp\u00e8ce dans les Cantons-de-l\u2019Est.<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Sites d\u2019\u00e9tudes<\/strong><\/p>\n<p>Dans le but d\u2019accro\u00eetre nos connaissances sur la pr\u00e9sence du nerprun bourdaine dans les Cantons-de-l\u2019Est, nous avons tent\u00e9 de d\u00e9terminer son ou ses milieux de pr\u00e9dilection lors d\u2019une campagne d\u2019\u00e9chantillonnage r\u00e9alis\u00e9e \u00e0 l\u2019automne 2011, dans la r\u00e9gion de Sherbrooke. Un total de 30 parcelles (400 m<sup>2<\/sup>\/parcelle) a \u00e9t\u00e9 \u00e9chantillonn\u00e9 chez diff\u00e9rents propri\u00e9taires priv\u00e9s. Ces parcelles ont \u00e9t\u00e9 choisies de fa\u00e7on \u00e0 repr\u00e9senter un gradient d\u2019abondance du nerprun et un gradient de conditions \u00e9cologiques (altitude, drainage, types, \u00e2ges et composition des peuplements, ouverture du couvert forestier, etc.). Cet \u00e9chantillonnage a \u00e9t\u00e9 effectu\u00e9 exclusivement dans des for\u00eats secondaires (r\u00e9g\u00e9n\u00e9r\u00e9es apr\u00e8s coupe pour la plupart).<\/p>\n<p>&nbsp;<\/p>\n<p><strong>R\u00e9sultats pr\u00e9liminaires<\/strong><\/p>\n<p>Un inventaire floristique et la mesure des variables environnementales ont \u00e9t\u00e9 r\u00e9alis\u00e9s dans chaque parcelle. Pour le moment, nos r\u00e9sultats sugg\u00e8rent que\u00a0:<\/p>\n<p>&nbsp;<\/p>\n<ul>\n<li><img loading=\"lazy\" decoding=\"async\" class=\"alignright wp-image-173 size-full\" src=\"http:\/\/www.frfce.qc.ca\/wp-content\/uploads\/2014\/08\/coupe_forestere_envahie_nerprun.png\" alt=\"coupe foresti\u00e8re envahie par le nerprun\" width=\"200\" height=\"200\" srcset=\"https:\/\/www.frfce.qc.ca\/wp-content\/uploads\/2014\/08\/coupe_forestere_envahie_nerprun.png 200w, https:\/\/www.frfce.qc.ca\/wp-content\/uploads\/2014\/08\/coupe_forestere_envahie_nerprun-150x150.png 150w, https:\/\/www.frfce.qc.ca\/wp-content\/uploads\/2014\/08\/coupe_forestere_envahie_nerprun-50x50.png 50w\" sizes=\"auto, (max-width: 200px) 100vw, 200px\" \/>Malgr\u00e9 des caract\u00e9ristiques de site et des abondances de nerprun bourdaine fort vari\u00e9es, les analyses n\u2019ont pas permis d\u2019identifier de liens solides entre la pr\u00e9sence du nerprun bourdaine et le type de milieu, des caract\u00e9ristiques \u00e9cologiques ou des caract\u00e9ristiques de sol.<\/li>\n<li>Certains v\u00e9g\u00e9taux apparaissent comme esp\u00e8ces compagnes du nerprun (gadellier lacustre, mousses, aulne rugueux). Ces esp\u00e8ces sont caract\u00e9ristiques des sols mal drain\u00e9s et acides, des milieux favorables au nerprun.<\/li>\n<li>\u00c0 l\u2019inverse, le nerprun est moins abondant en pr\u00e9sence du h\u00eatre et du fr\u00eane blanc, deux esp\u00e8ces prosp\u00e9rant sur les sols bien drain\u00e9s.<\/li>\n<li>Le nerprun semble coloniser autant les milieux ouverts que le sous-bois des for\u00eats.<\/li>\n<li>Pour le moment, aucun effet n\u00e9gatif du nerprun bourdaine sur la richesse des esp\u00e8ces herbac\u00e9es et arbustives ou sur le nombre de semis d\u2019arbres n\u2019a \u00e9t\u00e9 observ\u00e9.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>Notre \u00e9tude exploratoire permet de penser que le nerprun bourdaine peut s\u2019implanter essentiellement partout. Il est donc tr\u00e8s plausible que le nerprun se comporte telle une esp\u00e8ce plut\u00f4t g\u00e9n\u00e9raliste sur le territoire des Cantons-de-l\u2019Est, tel qu\u2019observ\u00e9 dans d\u2019autres r\u00e9gions. La Fiducie cherche pr\u00e9sentement \u00e0 accro\u00eetre son r\u00e9seau de parcelles de fa\u00e7on \u00e0 mieux comprendre la distribution et la dynamique du nerprun bourdaine dans le sud du Qu\u00e9bec. \u00c0 terme, nous cherchons \u00e0 identifier un seuil d\u2019abondance au-del\u00e0 duquel le nerprun devient probl\u00e9matique pour l\u2019am\u00e9nagement forestier.<br \/>\n<style id=\"bwg-style-0\">    #bwg_container1_0 #bwg_container2_0 .bwg-container-0.bwg-standard-thumbnails {      width: 604px;              justify-content: center;        margin:0 auto !important;              background-color: rgba(255, 255, 255, 0.00);            padding-left: 4px;      padding-top: 4px;      max-width: 100%;            }        #bwg_container1_0 #bwg_container2_0 .bwg-container-0.bwg-standard-thumbnails .bwg-item {    justify-content: flex-start;      max-width: 120px;            width: 120px !important;          }    #bwg_container1_0 #bwg_container2_0 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bwg_main_ready(jQuery(\"#bwg_container1_0\"));            }          }        });      }    <\/script>    <\/p>\n<p>&nbsp;<\/p>\n<p><strong>Documents<\/strong><\/p>\n<p>Un article de vulgarisation\u00a0a \u00e9t\u00e9 publi\u00e9 en lien avec ce projet\u00a0:<\/p>\n<p>&#8211;\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Schoeb, J., B. Truax, et D. Gagnon. 2012. Le nerprun bourdaine, un envahisseur \u00e0 la conqu\u00eate des for\u00eats du sud du Qu\u00e9bec. Progr\u00e8s Forestier (Printemps 2012):8-12. <a href=\"http:\/\/www.afm.qc.ca\/UTCF\/APF_NerprunB.pdf\" target=\"_blank\">www.afm.qc.ca\/UTCF\/APF_NerprunB.pdf<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Mise en contexte Le nerprun bourdaine est une esp\u00e8ce arbustive exotique, originaire d\u2019Europe et d\u2019Asie. Elle a \u00e9t\u00e9 introduite en Am\u00e9rique du Nord aux premiers temps de la colonisation, mais ce n\u2019est qu\u2019\u00e0 la toute fin des ann\u00e9es 1800 que les premi\u00e8res observations en nature sont faites en Ontario. En l\u2019espace d\u2019\u00e0 peine un si\u00e8cle, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":22,"menu_order":2,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-172","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.frfce.qc.ca\/index.php?rest_route=\/wp\/v2\/pages\/172","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.frfce.qc.ca\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.frfce.qc.ca\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.frfce.qc.ca\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.frfce.qc.ca\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=172"}],"version-history":[{"count":11,"href":"https:\/\/www.frfce.qc.ca\/index.php?rest_route=\/wp\/v2\/pages\/172\/revisions"}],"predecessor-version":[{"id":407,"href":"https:\/\/www.frfce.qc.ca\/index.php?rest_route=\/wp\/v2\/pages\/172\/revisions\/407"}],"up":[{"embeddable":true,"href":"https:\/\/www.frfce.qc.ca\/index.php?rest_route=\/wp\/v2\/pages\/22"}],"wp:attachment":[{"href":"https:\/\/www.frfce.qc.ca\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=172"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}