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class="social-profile-avatar-container"><img class="profile-avatar u-positionAbsolute" border="0" alt="" src="//a.academia-assets.com/images/s200_no_pic.png" /></div><div class="title-container"><h1 class="ds2-5-heading-sans-serif-sm">Derrick de Kerckhove</h1><div class="affiliations-container fake-truncate js-profile-affiliations"><div><a class="u-tcGrayDarker" href="https://utoronto.academia.edu/">University of Toronto</a>, <a class="u-tcGrayDarker" href="https://utoronto.academia.edu/Departments/French/Documents">French</a>, <span class="u-tcGrayDarker">Faculty Member</span></div></div></div></div><div class="sidebar-cta-container"><button class="ds2-5-button hidden profile-cta-button grow js-profile-follow-button" data-broccoli-component="user-info.follow-button" data-click-track="profile-user-info-follow-button" data-follow-user-fname="Derrick" data-follow-user-id="184131" data-follow-user-source="profile_button" data-has-google="false"><span class="material-symbols-outlined" 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class="data">7</p></div></a><div class="js-mentions-count-container" style="display: none;"><a href="/DerrickdeKerckhove/mentions"><div class="stat-container"><p class="label">Mentions</p><p class="data"></p></div></a></div><span><div class="stat-container"><p class="label"><span class="js-profile-total-view-text">Public Views</span></p><p class="data"><span class="js-profile-view-count"></span></p></div></span></div><div class="user-bio-container"><div class="profile-bio fake-truncate js-profile-about" style="margin: 0px;">Derrick de Kerckhove is former Director of the McLuhan Program in Culture<br /><div class="js-profile-less-about u-linkUnstyled u-tcGrayDarker u-textDecorationUnderline u-displayNone">less</div></div></div><div class="suggested-academics-container"><div class="suggested-academics--header"><p class="ds2-5-body-md-bold">Related Authors</p></div><ul class="suggested-user-card-list"><div class="suggested-user-card"><div class="suggested-user-card__avatar 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href="https://www.academia.edu/29734305/The_world_as_wide_web_following_codes_to_access_knowledge_lands"><img alt="Research paper thumbnail of The world as wide web: following codes to access knowledge-lands" class="work-thumbnail" src="https://a.academia-assets.com/images/blank-paper.jpg" /></a></div><div class="wp-workCard wp-workCard_itemContainer"><div class="wp-workCard_item wp-workCard--title"><a class="js-work-strip-work-link text-gray-darker" data-click-track="profile-work-strip-title" rel="nofollow" href="https://www.academia.edu/29734305/The_world_as_wide_web_following_codes_to_access_knowledge_lands">The world as wide web: following codes to access knowledge-lands</a></div><div class="wp-workCard_item wp-workCard--coauthors"><span>by </span><span><a class="" data-click-track="profile-work-strip-authors" href="https://ehu.academia.edu/CMirandadeAlmeida">Cristina Miranda de Almeida</a>, <a class="" data-click-track="profile-work-strip-authors" href="https://independent.academia.edu/MatteoCiastellardi">Matteo Ciastellardi</a>, and <a class="" data-click-track="profile-work-strip-authors" href="https://utoronto.academia.edu/DerrickdeKerckhove">Derrick de Kerckhove</a></span></div><div class="wp-workCard_item"><span>Technoetic Arts</span><span>, 2010</span></div><div class="wp-workCard_item"><span class="js-work-more-abstract-truncated">ABSTRACT In this article, we will firstly explore the concept of connected design; secondly, we w...</span><a class="js-work-more-abstract" data-broccoli-component="work_strip.more_abstract" data-click-track="profile-work-strip-more-abstract" href="javascript:;"><span> more </span><span><i class="fa fa-caret-down"></i></span></a><span class="js-work-more-abstract-untruncated hidden">ABSTRACT In this article, we will firstly explore the concept of connected design; secondly, we will explain how environments can be understood as interfaces for knowledge; and thirdly, we will expose the characteristics and objectives of the project Wired Book &amp;amp; Electronic ...</span></div><div class="wp-workCard_item wp-workCard--actions"><span class="work-strip-bookmark-button-container"></span><span class="wp-workCard--action visible-if-viewed-by-owner inline-block" style="display: none;"><span class="js-profile-work-strip-edit-button-wrapper profile-work-strip-edit-button-wrapper" data-work-id="29734305"><a class="js-profile-work-strip-edit-button" tabindex="0"><span><i class="fa fa-pencil"></i></span><span>Edit</span></a></span></span></div><div class="wp-workCard_item wp-workCard--stats"><span><span><span class="js-view-count view-count u-mr2x" data-work-id="29734305"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 29734305; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); 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})(["https://a.academia-assets.com/assets/wow_profile-a9bf3a2bc8c89fa2a77156577594264ee8a0f214d74241bc0fcd3f69f8d107ac.js","https://a.academia-assets.com/assets/work_edit-ad038b8c047c1a8d4fa01b402d530ff93c45fee2137a149a4a5398bc8ad67560.js"], function() { // from javascript_helper.rb var dispatcherData = {} if (false){ window.WowProfile.dispatcher = window.WowProfile.dispatcher || _.clone(Backbone.Events); dispatcherData = { dispatcher: window.WowProfile.dispatcher, downloadLinkId: "-1" } } $('.js-work-strip[data-work-id=29734305]').each(function() { if (!$(this).data('initialized')) { new WowProfile.WorkStripView({ el: this, workJSON: {"id":29734305,"title":"The world as wide web: following codes to access knowledge-lands","internal_url":"https://www.academia.edu/29734305/The_world_as_wide_web_following_codes_to_access_knowledge_lands","owner_id":283906,"coauthors_can_edit":true,"owner":{"id":283906,"first_name":"Cristina","middle_initials":null,"last_name":"Miranda de 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class="js-work-strip-work-link text-gray-darker" data-click-track="profile-work-strip-title" href="https://www.academia.edu/28412190/MCLUHAN_AND_THE_TORONTO_SCHOOL_OF_COMMUNICATION_">MCLUHAN AND THE "TORONTO SCHOOL OF COMMUNICATION"</a></div><div class="wp-workCard_item"><span class="js-work-more-abstract-truncated">An early assessment of what constituted the Toronto School of Communication and what role Marshal...</span><a class="js-work-more-abstract" data-broccoli-component="work_strip.more_abstract" data-click-track="profile-work-strip-more-abstract" href="javascript:;"><span> more </span><span><i class="fa fa-caret-down"></i></span></a><span class="js-work-more-abstract-untruncated hidden">An early assessment of what constituted the Toronto School of Communication and what role Marshall McLuhan played into it</span></div><div class="wp-workCard_item wp-workCard--actions"><span class="work-strip-bookmark-button-container"></span><a id="dd7c159fd7e33304b5d423b8b2505ace" 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dispatcherData: dispatcherData }); $(this).data('initialized', true); } }); $a.trackClickSource(".js-work-strip-work-link", "profile_work_strip") }); </script> <div class="js-work-strip profile--work_container" data-work-id="18119461"><div class="profile--work_thumbnail hidden-xs"><a class="js-work-strip-work-link" data-click-track="profile-work-strip-thumbnail" href="https://www.academia.edu/18119461/The_Maintenance_of_Genetic_Variation_Due_to_Asymmetric_Gene_Flow_in_Dendritic_Metapopulations"><img alt="Research paper thumbnail of The Maintenance of Genetic Variation Due to Asymmetric Gene Flow in Dendritic Metapopulations" class="work-thumbnail" src="https://attachments.academia-assets.com/39885343/thumbnails/1.jpg" /></a></div><div class="wp-workCard wp-workCard_itemContainer"><div class="wp-workCard_item wp-workCard--title"><a class="js-work-strip-work-link text-gray-darker" data-click-track="profile-work-strip-title" href="https://www.academia.edu/18119461/The_Maintenance_of_Genetic_Variation_Due_to_Asymmetric_Gene_Flow_in_Dendritic_Metapopulations">The Maintenance of Genetic Variation Due to Asymmetric Gene Flow in Dendritic Metapopulations</a></div><div class="wp-workCard_item wp-workCard--coauthors"><span>by </span><span><a class="" data-click-track="profile-work-strip-authors" href="https://utoronto.academia.edu/DerrickdeKerckhove">Derrick de Kerckhove</a> and <a class="" data-click-track="profile-work-strip-authors" href="https://independent.academia.edu/MorrisseyMichael">Michael Morrissey</a></span></div><div class="wp-workCard_item"><span>The American Naturalist</span><span>, 2009</span></div><div class="wp-workCard_item"><span class="js-work-more-abstract-truncated">Dendritic landscapes can have ecological properties that differ importantly from simpler spatial ...</span><a class="js-work-more-abstract" data-broccoli-component="work_strip.more_abstract" data-click-track="profile-work-strip-more-abstract" href="javascript:;"><span> more </span><span><i class="fa fa-caret-down"></i></span></a><span class="js-work-more-abstract-untruncated hidden">Dendritic landscapes can have ecological properties that differ importantly from simpler spatial arrangements of habitats. Most dendritic landscapes are structured by elevation, and therefore, migration is likely to be directionally biased. While the populationgenetic consequences of both dendritic landscape arrangements and asymmetric migration have begun to be studied, these processes have not been considered together. Simple conceptual models predict that if migration into branch (headwater) populations is limited, such populations can act as reservoirs for potentially unique alleles. As a consequence of the fact that dendritic landscapes have, by definition, more branches than internal habitat patches, this process may lead to the maintenance of higher overall genetic diversities in metapopulations inhabiting dendritic networks where migration is directionally biased. Here we begin to address the generality of these simple predictions using genetic models and a review of empirical literature. We show, for a range of demographic parameters, that dendritic systems with asymmetric migration can maintain levels of genetic variation that are very different, sometimes very elevated, compared with more classical models of geographical population structure. Furthermore, predicted patterns of genetic variation within metapopulations-that is, stepwise increases in genetic diversity at nodesdo occur in some empirical data.</span></div><div class="wp-workCard_item wp-workCard--actions"><span class="work-strip-bookmark-button-container"></span><a id="81b4fc248c8ec1b9341589fe48b56369" class="wp-workCard--action" rel="nofollow" data-click-track="profile-work-strip-download" data-download="{"attachment_id":39885343,"asset_id":18119461,"asset_type":"Work","button_location":"profile"}" href="https://www.academia.edu/attachments/39885343/download_file?s=profile"><span><i class="fa fa-arrow-down"></i></span><span>Download</span></a><span class="wp-workCard--action visible-if-viewed-by-owner inline-block" style="display: none;"><span class="js-profile-work-strip-edit-button-wrapper profile-work-strip-edit-button-wrapper" data-work-id="18119461"><a class="js-profile-work-strip-edit-button" tabindex="0"><span><i class="fa fa-pencil"></i></span><span>Edit</span></a></span></span></div><div class="wp-workCard_item wp-workCard--stats"><span><span><span class="js-view-count view-count u-mr2x" data-work-id="18119461"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 18119461; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=18119461]").text(description); $(".js-view-count[data-work-id=18119461]").attr('title', description).tooltip(); }); });</script></span></span><span><span class="percentile-widget hidden"><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 18119461; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-work-strip[data-work-id='18119461']"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></span></div><div id="work-strip-premium-row-container"></div></div></div><script> require.config({ waitSeconds: 90 })(["https://a.academia-assets.com/assets/wow_profile-a9bf3a2bc8c89fa2a77156577594264ee8a0f214d74241bc0fcd3f69f8d107ac.js","https://a.academia-assets.com/assets/work_edit-ad038b8c047c1a8d4fa01b402d530ff93c45fee2137a149a4a5398bc8ad67560.js"], function() { // from javascript_helper.rb var dispatcherData = {} if (true){ window.WowProfile.dispatcher = window.WowProfile.dispatcher || _.clone(Backbone.Events); dispatcherData = { dispatcher: window.WowProfile.dispatcher, downloadLinkId: "81b4fc248c8ec1b9341589fe48b56369" } } $('.js-work-strip[data-work-id=18119461]').each(function() { if (!$(this).data('initialized')) { new WowProfile.WorkStripView({ el: this, workJSON: {"id":18119461,"title":"The Maintenance of Genetic Variation Due to Asymmetric Gene Flow in Dendritic Metapopulations","translated_title":"","metadata":{"ai_title_tag":"Genetic Variation in Dendritic Metapopulations","grobid_abstract":"Dendritic landscapes can have ecological properties that differ importantly from simpler spatial arrangements of habitats. Most dendritic landscapes are structured by elevation, and therefore, migration is likely to be directionally biased. While the populationgenetic consequences of both dendritic landscape arrangements and asymmetric migration have begun to be studied, these processes have not been considered together. Simple conceptual models predict that if migration into branch (headwater) populations is limited, such populations can act as reservoirs for potentially unique alleles. As a consequence of the fact that dendritic landscapes have, by definition, more branches than internal habitat patches, this process may lead to the maintenance of higher overall genetic diversities in metapopulations inhabiting dendritic networks where migration is directionally biased. Here we begin to address the generality of these simple predictions using genetic models and a review of empirical literature. We show, for a range of demographic parameters, that dendritic systems with asymmetric migration can maintain levels of genetic variation that are very different, sometimes very elevated, compared with more classical models of geographical population structure. Furthermore, predicted patterns of genetic variation within metapopulations-that is, stepwise increases in genetic diversity at nodesdo occur in some empirical data.","publication_date":{"day":null,"month":null,"year":2009,"errors":{}},"publication_name":"The American Naturalist","grobid_abstract_attachment_id":39885343},"translated_abstract":null,"internal_url":"https://www.academia.edu/18119461/The_Maintenance_of_Genetic_Variation_Due_to_Asymmetric_Gene_Flow_in_Dendritic_Metapopulations","translated_internal_url":"","created_at":"2015-11-10T17:05:57.866-08:00","preview_url":null,"current_user_can_edit":null,"current_user_is_owner":null,"owner_id":38070574,"coauthors_can_edit":true,"document_type":"paper","co_author_tags":[{"id":9412388,"work_id":18119461,"tagging_user_id":38070574,"tagged_user_id":184131,"co_author_invite_id":null,"email":"d***h@gmail.co","affiliation":"University of Toronto","display_order":0,"name":"Derrick de Kerckhove","title":"The Maintenance of Genetic Variation Due to Asymmetric Gene Flow in Dendritic Metapopulations"}],"downloadable_attachments":[{"id":39885343,"title":"","file_type":"pdf","scribd_thumbnail_url":"https://attachments.academia-assets.com/39885343/thumbnails/1.jpg","file_name":"The_Maintenance_of_Genetic_Variation_Due20151111-27850-8h723m.pdf","download_url":"https://www.academia.edu/attachments/39885343/download_file","bulk_download_file_name":"The_Maintenance_of_Genetic_Variation_Due.pdf","bulk_download_url":"https://d1wqtxts1xzle7.cloudfront.net/39885343/The_Maintenance_of_Genetic_Variation_Due20151111-27850-8h723m-libre.pdf?1447204069=\u0026response-content-disposition=attachment%3B+filename%3DThe_Maintenance_of_Genetic_Variation_Due.pdf\u0026Expires=1738793075\u0026Signature=gS7k7JECenbiQAjfoOGkewPY3zDyWBWOpm8shDYfDZErT4LSGFYoc6vWu14~dHOdN6~pTHGez9TC0en8yqYWQEvFDM8uTDAdsh2BsyLkwzcmLMqMPJx0r65cUnETPgs156zpxVXst34z1dA4GsOUhKc5ttvBnZaWyYyyYsOi-IerZfC7fGT~YxgeiYy0WFYu5064EhaillyKgtk8HY~eLkz~f2UyiPdcDGvlESwZr376y~J5ChpBYw1mFt6FkbXUv15JLGlkhOs70hT-QyalLWBj0pTlW1-XqO7Qbme0xEUxfx1Jlgn61QafkG3I9Neyan-UGKQ-b0kiEtwSyOtpRw__\u0026Key-Pair-Id=APKAJLOHF5GGSLRBV4ZA"}],"slug":"The_Maintenance_of_Genetic_Variation_Due_to_Asymmetric_Gene_Flow_in_Dendritic_Metapopulations","translated_slug":"","page_count":15,"language":"en","content_type":"Work","summary":"Dendritic landscapes can have ecological properties that differ importantly from simpler spatial arrangements of habitats. Most dendritic landscapes are structured by elevation, and therefore, migration is likely to be directionally biased. While the populationgenetic consequences of both dendritic landscape arrangements and asymmetric migration have begun to be studied, these processes have not been considered together. Simple conceptual models predict that if migration into branch (headwater) populations is limited, such populations can act as reservoirs for potentially unique alleles. As a consequence of the fact that dendritic landscapes have, by definition, more branches than internal habitat patches, this process may lead to the maintenance of higher overall genetic diversities in metapopulations inhabiting dendritic networks where migration is directionally biased. Here we begin to address the generality of these simple predictions using genetic models and a review of empirical literature. We show, for a range of demographic parameters, that dendritic systems with asymmetric migration can maintain levels of genetic variation that are very different, sometimes very elevated, compared with more classical models of geographical population structure. Furthermore, predicted patterns of genetic variation within metapopulations-that is, stepwise increases in genetic diversity at nodesdo occur in some empirical data.","owner":{"id":38070574,"first_name":"Michael","middle_initials":null,"last_name":"Morrissey","page_name":"MorrisseyMichael","domain_name":"independent","created_at":"2015-11-10T17:05:10.690-08:00","display_name":"Michael Morrissey","url":"https://independent.academia.edu/MorrisseyMichael"},"attachments":[{"id":39885343,"title":"","file_type":"pdf","scribd_thumbnail_url":"https://attachments.academia-assets.com/39885343/thumbnails/1.jpg","file_name":"The_Maintenance_of_Genetic_Variation_Due20151111-27850-8h723m.pdf","download_url":"https://www.academia.edu/attachments/39885343/download_file","bulk_download_file_name":"The_Maintenance_of_Genetic_Variation_Due.pdf","bulk_download_url":"https://d1wqtxts1xzle7.cloudfront.net/39885343/The_Maintenance_of_Genetic_Variation_Due20151111-27850-8h723m-libre.pdf?1447204069=\u0026response-content-disposition=attachment%3B+filename%3DThe_Maintenance_of_Genetic_Variation_Due.pdf\u0026Expires=1738793075\u0026Signature=gS7k7JECenbiQAjfoOGkewPY3zDyWBWOpm8shDYfDZErT4LSGFYoc6vWu14~dHOdN6~pTHGez9TC0en8yqYWQEvFDM8uTDAdsh2BsyLkwzcmLMqMPJx0r65cUnETPgs156zpxVXst34z1dA4GsOUhKc5ttvBnZaWyYyyYsOi-IerZfC7fGT~YxgeiYy0WFYu5064EhaillyKgtk8HY~eLkz~f2UyiPdcDGvlESwZr376y~J5ChpBYw1mFt6FkbXUv15JLGlkhOs70hT-QyalLWBj0pTlW1-XqO7Qbme0xEUxfx1Jlgn61QafkG3I9Neyan-UGKQ-b0kiEtwSyOtpRw__\u0026Key-Pair-Id=APKAJLOHF5GGSLRBV4ZA"}],"research_interests":[{"id":4313,"name":"Gene Flow","url":"https://www.academia.edu/Documents/in/Gene_Flow"},{"id":4480,"name":"Population Genetics","url":"https://www.academia.edu/Documents/in/Population_Genetics"},{"id":11417,"name":"Population Dynamics","url":"https://www.academia.edu/Documents/in/Population_Dynamics"},{"id":19673,"name":"River Ecology","url":"https://www.academia.edu/Documents/in/River_Ecology"},{"id":41673,"name":"Animal Movement","url":"https://www.academia.edu/Documents/in/Animal_Movement"},{"id":47884,"name":"Biological Sciences","url":"https://www.academia.edu/Documents/in/Biological_Sciences"},{"id":373754,"name":"Ecosystem","url":"https://www.academia.edu/Documents/in/Ecosystem"},{"id":577933,"name":"Genetic variation","url":"https://www.academia.edu/Documents/in/Genetic_variation"}],"urls":[]}, dispatcherData: dispatcherData }); 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</script> <div class="js-work-strip profile--work_container" data-work-id="29734305"><div class="profile--work_thumbnail hidden-xs"><a class="js-work-strip-work-link" data-click-track="profile-work-strip-thumbnail" rel="nofollow" href="https://www.academia.edu/29734305/The_world_as_wide_web_following_codes_to_access_knowledge_lands"><img alt="Research paper thumbnail of The world as wide web: following codes to access knowledge-lands" class="work-thumbnail" src="https://a.academia-assets.com/images/blank-paper.jpg" /></a></div><div class="wp-workCard wp-workCard_itemContainer"><div class="wp-workCard_item wp-workCard--title"><a class="js-work-strip-work-link text-gray-darker" data-click-track="profile-work-strip-title" rel="nofollow" href="https://www.academia.edu/29734305/The_world_as_wide_web_following_codes_to_access_knowledge_lands">The world as wide web: following codes to access knowledge-lands</a></div><div class="wp-workCard_item wp-workCard--coauthors"><span>by </span><span><a class="" data-click-track="profile-work-strip-authors" href="https://ehu.academia.edu/CMirandadeAlmeida">Cristina Miranda de Almeida</a>, <a class="" data-click-track="profile-work-strip-authors" href="https://independent.academia.edu/MatteoCiastellardi">Matteo Ciastellardi</a>, and <a class="" data-click-track="profile-work-strip-authors" href="https://utoronto.academia.edu/DerrickdeKerckhove">Derrick de Kerckhove</a></span></div><div class="wp-workCard_item"><span>Technoetic Arts</span><span>, 2010</span></div><div class="wp-workCard_item"><span class="js-work-more-abstract-truncated">ABSTRACT In this article, we will firstly explore the concept of connected design; secondly, we w...</span><a class="js-work-more-abstract" data-broccoli-component="work_strip.more_abstract" data-click-track="profile-work-strip-more-abstract" href="javascript:;"><span> more </span><span><i class="fa fa-caret-down"></i></span></a><span class="js-work-more-abstract-untruncated hidden">ABSTRACT In this article, we will firstly explore the concept of connected design; secondly, we will explain how environments can be understood as interfaces for knowledge; and thirdly, we will expose the characteristics and objectives of the project Wired Book &amp;amp; Electronic ...</span></div><div class="wp-workCard_item wp-workCard--actions"><span class="work-strip-bookmark-button-container"></span><span class="wp-workCard--action visible-if-viewed-by-owner inline-block" style="display: none;"><span class="js-profile-work-strip-edit-button-wrapper profile-work-strip-edit-button-wrapper" data-work-id="29734305"><a class="js-profile-work-strip-edit-button" tabindex="0"><span><i class="fa fa-pencil"></i></span><span>Edit</span></a></span></span></div><div class="wp-workCard_item wp-workCard--stats"><span><span><span class="js-view-count view-count u-mr2x" data-work-id="29734305"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 29734305; 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$(this).data('initialized', true); } }); $a.trackClickSource(".js-work-strip-work-link", "profile_work_strip") }); </script> <div class="js-work-strip profile--work_container" data-work-id="18119461"><div class="profile--work_thumbnail hidden-xs"><a class="js-work-strip-work-link" data-click-track="profile-work-strip-thumbnail" href="https://www.academia.edu/18119461/The_Maintenance_of_Genetic_Variation_Due_to_Asymmetric_Gene_Flow_in_Dendritic_Metapopulations"><img alt="Research paper thumbnail of The Maintenance of Genetic Variation Due to Asymmetric Gene Flow in Dendritic Metapopulations" class="work-thumbnail" src="https://attachments.academia-assets.com/39885343/thumbnails/1.jpg" /></a></div><div class="wp-workCard wp-workCard_itemContainer"><div class="wp-workCard_item wp-workCard--title"><a class="js-work-strip-work-link text-gray-darker" data-click-track="profile-work-strip-title" href="https://www.academia.edu/18119461/The_Maintenance_of_Genetic_Variation_Due_to_Asymmetric_Gene_Flow_in_Dendritic_Metapopulations">The Maintenance of Genetic Variation Due to Asymmetric Gene Flow in Dendritic Metapopulations</a></div><div class="wp-workCard_item wp-workCard--coauthors"><span>by </span><span><a class="" data-click-track="profile-work-strip-authors" href="https://utoronto.academia.edu/DerrickdeKerckhove">Derrick de Kerckhove</a> and <a class="" data-click-track="profile-work-strip-authors" href="https://independent.academia.edu/MorrisseyMichael">Michael Morrissey</a></span></div><div class="wp-workCard_item"><span>The American Naturalist</span><span>, 2009</span></div><div class="wp-workCard_item"><span class="js-work-more-abstract-truncated">Dendritic landscapes can have ecological properties that differ importantly from simpler spatial ...</span><a class="js-work-more-abstract" data-broccoli-component="work_strip.more_abstract" data-click-track="profile-work-strip-more-abstract" href="javascript:;"><span> more </span><span><i class="fa fa-caret-down"></i></span></a><span class="js-work-more-abstract-untruncated hidden">Dendritic landscapes can have ecological properties that differ importantly from simpler spatial arrangements of habitats. Most dendritic landscapes are structured by elevation, and therefore, migration is likely to be directionally biased. While the populationgenetic consequences of both dendritic landscape arrangements and asymmetric migration have begun to be studied, these processes have not been considered together. Simple conceptual models predict that if migration into branch (headwater) populations is limited, such populations can act as reservoirs for potentially unique alleles. As a consequence of the fact that dendritic landscapes have, by definition, more branches than internal habitat patches, this process may lead to the maintenance of higher overall genetic diversities in metapopulations inhabiting dendritic networks where migration is directionally biased. Here we begin to address the generality of these simple predictions using genetic models and a review of empirical literature. We show, for a range of demographic parameters, that dendritic systems with asymmetric migration can maintain levels of genetic variation that are very different, sometimes very elevated, compared with more classical models of geographical population structure. Furthermore, predicted patterns of genetic variation within metapopulations-that is, stepwise increases in genetic diversity at nodesdo occur in some empirical data.</span></div><div class="wp-workCard_item wp-workCard--actions"><span class="work-strip-bookmark-button-container"></span><a id="81b4fc248c8ec1b9341589fe48b56369" class="wp-workCard--action" rel="nofollow" data-click-track="profile-work-strip-download" data-download="{"attachment_id":39885343,"asset_id":18119461,"asset_type":"Work","button_location":"profile"}" href="https://www.academia.edu/attachments/39885343/download_file?s=profile"><span><i class="fa fa-arrow-down"></i></span><span>Download</span></a><span class="wp-workCard--action visible-if-viewed-by-owner inline-block" style="display: none;"><span class="js-profile-work-strip-edit-button-wrapper profile-work-strip-edit-button-wrapper" data-work-id="18119461"><a class="js-profile-work-strip-edit-button" tabindex="0"><span><i class="fa fa-pencil"></i></span><span>Edit</span></a></span></span></div><div class="wp-workCard_item wp-workCard--stats"><span><span><span class="js-view-count view-count u-mr2x" data-work-id="18119461"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 18119461; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=18119461]").text(description); $(".js-view-count[data-work-id=18119461]").attr('title', description).tooltip(); }); });</script></span></span><span><span class="percentile-widget hidden"><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 18119461; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-work-strip[data-work-id='18119461']"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></span></div><div id="work-strip-premium-row-container"></div></div></div><script> require.config({ waitSeconds: 90 })(["https://a.academia-assets.com/assets/wow_profile-a9bf3a2bc8c89fa2a77156577594264ee8a0f214d74241bc0fcd3f69f8d107ac.js","https://a.academia-assets.com/assets/work_edit-ad038b8c047c1a8d4fa01b402d530ff93c45fee2137a149a4a5398bc8ad67560.js"], function() { // from javascript_helper.rb var dispatcherData = {} if (true){ window.WowProfile.dispatcher = window.WowProfile.dispatcher || _.clone(Backbone.Events); dispatcherData = { dispatcher: window.WowProfile.dispatcher, downloadLinkId: "81b4fc248c8ec1b9341589fe48b56369" } } $('.js-work-strip[data-work-id=18119461]').each(function() { if (!$(this).data('initialized')) { new WowProfile.WorkStripView({ el: this, workJSON: {"id":18119461,"title":"The Maintenance of Genetic Variation Due to Asymmetric Gene Flow in Dendritic Metapopulations","translated_title":"","metadata":{"ai_title_tag":"Genetic Variation in Dendritic Metapopulations","grobid_abstract":"Dendritic landscapes can have ecological properties that differ importantly from simpler spatial arrangements of habitats. Most dendritic landscapes are structured by elevation, and therefore, migration is likely to be directionally biased. While the populationgenetic consequences of both dendritic landscape arrangements and asymmetric migration have begun to be studied, these processes have not been considered together. Simple conceptual models predict that if migration into branch (headwater) populations is limited, such populations can act as reservoirs for potentially unique alleles. As a consequence of the fact that dendritic landscapes have, by definition, more branches than internal habitat patches, this process may lead to the maintenance of higher overall genetic diversities in metapopulations inhabiting dendritic networks where migration is directionally biased. Here we begin to address the generality of these simple predictions using genetic models and a review of empirical literature. We show, for a range of demographic parameters, that dendritic systems with asymmetric migration can maintain levels of genetic variation that are very different, sometimes very elevated, compared with more classical models of geographical population structure. 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Most dendritic landscapes are structured by elevation, and therefore, migration is likely to be directionally biased. While the populationgenetic consequences of both dendritic landscape arrangements and asymmetric migration have begun to be studied, these processes have not been considered together. Simple conceptual models predict that if migration into branch (headwater) populations is limited, such populations can act as reservoirs for potentially unique alleles. As a consequence of the fact that dendritic landscapes have, by definition, more branches than internal habitat patches, this process may lead to the maintenance of higher overall genetic diversities in metapopulations inhabiting dendritic networks where migration is directionally biased. Here we begin to address the generality of these simple predictions using genetic models and a review of empirical literature. We show, for a range of demographic parameters, that dendritic systems with asymmetric migration can maintain levels of genetic variation that are very different, sometimes very elevated, compared with more classical models of geographical population structure. 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