{"id":2629,"date":"2018-01-09T17:31:22","date_gmt":"2018-01-09T16:31:22","guid":{"rendered":"https:\/\/ist.blogs.inra.fr\/afs\/?p=2629"},"modified":"2018-01-09T17:31:22","modified_gmt":"2018-01-09T16:31:22","slug":"mature-exotic-conifer-stands-have-greater-catches-of-the-eu-protected-geomalacus-maculosus-than-adjacent-peatland-or-clear-felled-stands-implications-for-forestry","status":"publish","type":"post","link":"https:\/\/ist.blogs.inrae.fr\/afs\/2018\/01\/09\/mature-exotic-conifer-stands-have-greater-catches-of-the-eu-protected-geomalacus-maculosus-than-adjacent-peatland-or-clear-felled-stands-implications-for-forestry\/","title":{"rendered":"Mature exotic conifer stands have greater catches of the EU-protected Geomalacus maculosus than adjacent peatland or clear-felled stands\u2014implications for forestry"},"content":{"rendered":"<script type='text\/javascript' src='https:\/\/d1bxh8uas1mnw7.cloudfront.net\/assets\/embed.js'><\/script><p>Mature exotic Sitka spruce (<em>Picea sitchensis<\/em>; Bong. Carri\u00e8re)-dominated stands, particularly trees of greater circumference, result in greater numbers of <em>Geomalacus maculosus<\/em> (Allman) captures than adjacent clear-felled stands and adjacent peatland with Before-After-Control-Impact-Paired analysis indicating lower catches of <em>G. maculosus<\/em> post-felling.<\/p>\n<p><strong>Context.<\/strong> The discovery of EU-protected <em>Geomalacus maculosus<\/em> in commercial plantations requires an understanding of the implications of forestry practices for the species within the context of sustainable forest management.<br \/>\n<strong>Aims.<\/strong><br \/>\n1. Compare <em>Geomalacus maculosus<\/em> captures across mature exotic Sitka spruce-dominated stands, previously clear-felled stands and adjacent peatland habitats.<br \/>\n2. Assess the suitability, for forest managers, of population estimate models for <em>G. maculosus<\/em>.<br \/>\n3. Assess the implications of felling by comparing relative abundances of <em>G. maculosus<\/em> directly before and after clear-felling at a mature exotic Sitka spruce-dominated stand.<br \/>\n<strong>Methods.<\/strong> <em>Geomalacus maculosus<\/em> catches were compared at four sites across two to three mature (43\u201345 years old) conifer stands per site, one clear-felled stand per site, and one adjacent peatland per site using refuge traps and hand searching. Capture-mark-recapture studies were undertaken to estimate population sizes. A BACIP (Before-After-Control-Impact-Paired) analysis was undertaken in one forest stand at one forest site to determine impacts of a clear-felling event.<br \/>\n<strong>Results.<\/strong> Mean catches of <em>Geomalacus maculosus<\/em> adults in the mature forest stands were over 10 and 11 times greater than mean catches on peatland and clear-fell stands, respectively. The Schnabel model for estimating population size was most suited for mature forest stands but could not be utilised for the other habitats. BACIP analysis showed a significant impact of clear-felling with a 95% reduction in mean <em>G. maculosus<\/em> catches after a clear-felling event where none of the individuals marked prior to felling were recaptured compared to 21% recapture rates at the control site. Greater tree circumference in mature conifer stands correlated with greater catches.<br \/>\n<strong>Conclusion.<\/strong> Guidelines are needed to ensure the protection of <em>Geomalacus maculosus<\/em> in commercial forestry. Interventions could include patch\/tall stump retention at final felling and\/or translocation of the protected species.<\/p>\n<p>Keywords<br \/>\nConservation, Capture-mark-recapture, Population estimates, Before-After-Control-Impact-Paired (BACIP), Slug<\/p>\n<div class='altmetric-embed' data-badge-type='donut' data-doi='10.1007\/s13595-017-0684-4'  style='float: right; ' ><\/div>\n<p>Publication<br \/>\nJohnston, E., Kindermann, G., O\u2019Callaghan, J. et al. Annals of Forest Science (2018) 75: 4.<br \/>\n<a href=\"https:\/\/doi.org\/10.1007\/s13595-017-0684-4\">https:\/\/doi.org\/10.1007\/s13595-017-0684-4<\/a><\/p>\n<p>For the read-only version of the full text: <a href=\"http:\/\/rdcu.be\/EocP\">http:\/\/rdcu.be\/EocP<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Mature exotic Sitka spruce (Picea sitchensis; Bong. Carri\u00e8re)-dominated stands, particularly trees of greater circumference, result in greater numbers of Geomalacus maculosus (Allman) captures than adjacent clear-felled stands and adjacent peatland with Before-After-Control-Impact-Paired analysis indicating lower catches of G. maculosus post-felling. Context. The discovery of EU-protected Geomalacus maculosus in commercial plantations requires an understanding of the [&hellip;]<\/p>\n","protected":false},"author":94,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14,15],"tags":[],"class_list":["post-2629","post","type-post","status-publish","format-standard","hentry","category-article-type","category-research-paper","cat-14-id","cat-15-id"],"_links":{"self":[{"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/posts\/2629","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\/94"}],"replies":[{"embeddable":true,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/comments?post=2629"}],"version-history":[{"count":0,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/posts\/2629\/revisions"}],"wp:attachment":[{"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/media?parent=2629"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/categories?post=2629"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/tags?post=2629"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}