A New (Old), Invasive Ant in the Hardwood Forests of Eastern North America and Its Potentially Widespread Impacts
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{"title"=>"A new (Old), invasive ant in the hardwood forests of eastern North America and its potentially widespread impacts", "type"=>"journal", "authors"=>[{"first_name"=>"Benoit", "last_name"=>"Guénard", "scopus_author_id"=>"26323665200"}, {"first_name"=>"Robert R.", "last_name"=>"Dunn", "scopus_author_id"=>"7402031494"}], "year"=>2010, "source"=>"PLoS ONE", "identifiers"=>{"scopus"=>"2-s2.0-77955370644", "doi"=>"10.1371/journal.pone.0011614", "sgr"=>"77955370644", "isbn"=>"1932-6203", "pmid"=>"20657769", "issn"=>"19326203", "pui"=>"359319175"}, "id"=>"d75a4527-4b44-330a-9b7d-fea1125bdc33", "abstract"=>"Biological invasions represent a serious threat for the conservation of biodiversity in many ecosystems. While many social insect species and in particular ant species have been introduced outside their native ranges, few species have been successful at invading temperate forests. In this study, we document for the first time the relationship between the abundance of the introduced ant, Pachycondyla chinensis, in mature forests of North Carolina and the composition, abundance and diversity of native ant species using both a matched pair approach and generalized linear models. Where present, P. chinensis was more abundant than all native species combined. The diversity and abundance of native ants in general and many individual species were negatively associated with the presence and abundance of P. chinensis. These patterns held regardless of our statistical approach and across spatial scales. Interestingly, while the majority of ant species was strongly and negatively correlated with the abundance and presence of P. chinensis, a small subset of ant species larger than P. chinensis was either as abundant or even more abundant in invaded than in uninvaded sites. The large geographic range of this ant species combined with its apparent impact on native species make it likely to have cascading consequences on eastern forests in years to come, effects mediated by the specifics of its life history which is very different from those of other invasive ants. The apparent ecological impacts of P. chinensis are in addition to public health concerns associated with this species due to its sometimes, deadly sting.", "link"=>"http://www.mendeley.com/research/new-old-invasive-ant-hardwood-forests-eastern-north-america-potentially-widespread-impacts", "reader_count"=>50, "reader_count_by_academic_status"=>{"Unspecified"=>2, "Professor > Associate Professor"=>2, "Researcher"=>14, "Student > Doctoral Student"=>3, "Student > Ph. D. Student"=>10, "Student > Postgraduate"=>1, "Student > Master"=>8, "Other"=>1, "Student > Bachelor"=>4, "Lecturer"=>1, "Lecturer > Senior Lecturer"=>1, "Professor"=>3}, "reader_count_by_user_role"=>{"Unspecified"=>2, "Professor > Associate Professor"=>2, "Researcher"=>14, "Student > Doctoral Student"=>3, "Student > Ph. D. Student"=>10, "Student > Postgraduate"=>1, "Student > Master"=>8, "Other"=>1, "Student > Bachelor"=>4, "Lecturer"=>1, "Lecturer > Senior Lecturer"=>1, "Professor"=>3}, "reader_count_by_subject_area"=>{"Unspecified"=>6, "Environmental Science"=>10, "Mathematics"=>1, "Agricultural and Biological Sciences"=>30, "Medicine and Dentistry"=>1, "Earth and Planetary Sciences"=>2}, "reader_count_by_subdiscipline"=>{"Medicine and Dentistry"=>{"Medicine and Dentistry"=>1}, "Earth and Planetary Sciences"=>{"Earth and Planetary Sciences"=>2}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>30}, "Mathematics"=>{"Mathematics"=>1}, "Unspecified"=>{"Unspecified"=>6}, "Environmental Science"=>{"Environmental Science"=>10}}, "reader_count_by_country"=>{"Reunion"=>1, "Canada"=>2, "Colombia"=>1, "United States"=>1, "Japan"=>1, "Denmark"=>1, "France"=>3, "Switzerland"=>1}, "group_count"=>3}

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Figshare

  • {"files"=>["https://ndownloader.figshare.com/files/839956"], "description"=>"<p>Sites with <i>P. chinensis</i> are represented by grey circles and sites without <i>P. chinensis</i> are in black. Width of circles is relative to the abundance of <i>P. chinensis</i> found per site (after data transformed with a log +2). (A) Matched pair design (15 paired sites of 13 pitfall traps used for each site). (B) Actual presence of <i>P. chinensis</i> design (9 paired sites with 12 pitfall traps used for each site).</p>", "links"=>[], "tags"=>["ants", "abundance"], "article_id"=>510418, "categories"=>["Ecology"], "users"=>["Benoit Guénard", "Robert R. Dunn"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0011614.g004", "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Species_density_of_native_ants_per_site_as_a_function_of_the_abundance_of_native_ants_and_the_presence_of_P_chinensis_/510418", "title"=>"Species density of native ants per site as a function of the abundance of native ants and the presence of <i>P. chinensis</i>.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2010-07-21 00:06:58"}
  • {"files"=>["https://ndownloader.figshare.com/files/839582"], "description"=>"<p>(A) Relationship between the abundance of <i>P.chinensis</i> and the species density of native ants per pitfall trap. (B) Relationship between the abundance of <i>P.chinensis</i> and the abundance of native ants per pitfall trap. Numbers in parenthesis represent the number of pitfall traps for each category.</p>", "links"=>[], "tags"=>["abundance", "ants"], "article_id"=>510050, "categories"=>["Ecology"], "users"=>["Benoit Guénard", "Robert R. Dunn"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0011614.g001", "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Responses_of_the_species_density_and_abundance_of_native_ants_to_P_chinensis_abundance_/510050", "title"=>"Responses of the species density and abundance of native ants to <i>P. chinensis</i> abundance.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2010-07-21 00:00:50"}
  • {"files"=>["https://ndownloader.figshare.com/files/839860"], "description"=>"<p>Grey circles represent sites presented in Ward (2000) and our own sampling using Ward's method (site details in supplement). Red circles represent sites sampled within North Carolina where <i>P. chinensis</i> was absent. Black circles represent sites collected in North Carolina where <i>P. chinensis</i> was present.</p>", "links"=>[], "tags"=>["individuals", "winkler"], "article_id"=>510323, "categories"=>["Ecology"], "users"=>["Benoit Guénard", "Robert R. Dunn"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0011614.g003", "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Ant_species_density_as_a_function_of_the_number_of_individuals_collected_with_Winkler_techniques_/510323", "title"=>"Ant species density as a function of the number of individuals collected with Winkler techniques.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2010-07-21 00:05:23"}
  • {"files"=>["https://ndownloader.figshare.com/files/839685"], "description"=>"<p>(A) <i>Aphaenogaster</i> (B) <i>Camponotus</i> (C) <i>Crematogaster</i> (D) <i>Formica</i> (E) small Myrmicinae, and (F) small Formicinae.</p>", "links"=>[], "tags"=>["abundance"], "article_id"=>510150, "categories"=>["Ecology"], "users"=>["Benoit Guénard", "Robert R. Dunn"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0011614.g002", "stats"=>{"downloads"=>0, "page_views"=>1, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Relationship_between_P_chinensis_abundance_and_the_native_species_density_/510150", "title"=>"Relationship between <i>P. chinensis</i> abundance and the native species density.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2010-07-21 00:02:30"}
  • {"files"=>["https://ndownloader.figshare.com/files/418280", "https://ndownloader.figshare.com/files/418296", "https://ndownloader.figshare.com/files/418304", "https://ndownloader.figshare.com/files/418310"], "description"=>"<div><p>Biological invasions represent a serious threat for the conservation of biodiversity in many ecosystems. While many social insect species and in particular ant species have been introduced outside their native ranges, few species have been successful at invading temperate forests. In this study, we document for the first time the relationship between the abundance of the introduced ant, <em>Pachycondyla chinensis</em>, in mature forests of North Carolina and the composition, abundance and diversity of native ant species using both a matched pair approach and generalized linear models. Where present, <em>P. chinensis</em> was more abundant than all native species combined. The diversity and abundance of native ants in general and many individual species were negatively associated with the presence and abundance of <em>P. chinensis</em>. These patterns held regardless of our statistical approach and across spatial scales. Interestingly, while the majority of ant species was strongly and negatively correlated with the abundance and presence of <em>P. chinensis</em>, a small subset of ant species larger than <em>P. chinensis</em> was either as abundant or even more abundant in invaded than in uninvaded sites. The large geographic range of this ant species combined with its apparent impact on native species make it likely to have cascading consequences on eastern forests in years to come, effects mediated by the specifics of its life history which is very different from those of other invasive ants. The apparent ecological impacts of <em>P. chinensis</em> are in addition to public health concerns associated with this species due to its sometimes, deadly sting.</p></div>", "links"=>[], "tags"=>["invasive", "ant", "hardwood", "forests", "america", "impacts"], "article_id"=>142586, "categories"=>["Ecology"], "users"=>["Benoit Guénard", "Robert R. Dunn"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0011614.s001", "https://dx.doi.org/10.1371/journal.pone.0011614.s002", "https://dx.doi.org/10.1371/journal.pone.0011614.s003", "https://dx.doi.org/10.1371/journal.pone.0011614.s004"], "stats"=>{"downloads"=>27, "page_views"=>8, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/A_New_Old_Invasive_Ant_in_the_Hardwood_Forests_of_Eastern_North_America_and_Its_Potentially_Widespread_Impacts/142586", "title"=>"A New (Old), Invasive Ant in the Hardwood Forests of Eastern North America and Its Potentially Widespread Impacts", "pos_in_sequence"=>0, "defined_type"=>4, "published_date"=>"2010-07-21 00:43:06"}
  • {"files"=>["https://ndownloader.figshare.com/files/840084"], "description"=>"<p>Models are arranged according to increasing complexity, from left to right. The first model includes only the native species density. “+number of pitfall traps per site” includes the number of native species as well as the number of pitfall traps collected per site. “+<i>P. chinensis</i> abundance” model includes the number of native species, the number of pitfall traps per site and the total abundance of <i>P. chinensis</i> per site. “+Saturation of <i>P. chinensis</i>” model adds the effect of the number of pitfall traps collected where <i>P. chinensis</i> was present. Note that the effects of native species density and number of pitfall traps are positive on native species abundance, while both the effects of abundance and saturation of <i>P. chinensis</i> are negative on native species abundance. All more complex models are significantly better using −log likelihood ratio than the simpler model. All four models are exponentials of the form <i>species abundance</i> = <i>e</i><sup>Σ parameter <i>i</i>*value <i>j</i></sup>.</p>", "links"=>[], "tags"=>["nested", "generalized", "linear", "models", "ant"], "article_id"=>510540, "categories"=>["Ecology"], "users"=>["Benoit Guénard", "Robert R. Dunn"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0011614.t001", "stats"=>{"downloads"=>0, "page_views"=>2, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Four_nested_Generalized_Linear_Models_of_native_ant_abundance_/510540", "title"=>"Four nested Generalized Linear Models of native ant abundance.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2010-07-21 00:09:00"}
  • {"files"=>["https://ndownloader.figshare.com/files/840114"], "description"=>"<p>Models are ordered according to increasing complexity, from left to right. The first model includes only the abundance of native ants. “+number of pitfall traps per site” includes the abundance of native ants as well as the number of pitfall traps collected per site. “+<i>P. chinensis</i> abundance” model includes the abundance of native ants, the number of pitfall traps per site and the total abundance of <i>P. chinensis</i> per site. “+saturation of <i>P. chinensis</i>” model includes the effect of the number of pitfall traps collected where <i>P. chinensis</i> was present. Only the effect of the abundance of native ants is positively associated with native species density, while only <i>P. chinensis</i> abundance is negatively associated with native species density. All four models are exponentials of the form <i>species density</i> = <i>e</i><sup>Σ parameter <i>i</i>*value <i>j</i></sup>.</p>", "links"=>[], "tags"=>["nested", "generalized", "linear", "models"], "article_id"=>510573, "categories"=>["Ecology"], "users"=>["Benoit Guénard", "Robert R. Dunn"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0011614.t002", "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Four_nested_Generalized_Linear_Models_of_species_density_of_native_ants_/510573", "title"=>"Four nested Generalized Linear Models of species density of native ants.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2010-07-21 00:09:33"}

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