Savanna elephant numbers are only a quarter of their expected values
Publication Date
April 17, 2017
Authors
Ashley S. Robson, Morgan J. Trimble, Andrew Purdon, Kim D. Young Overton, et al
Volume
12
Issue
4
Pages
e0175942
DOI
https://dx.plos.org/10.1371/journal.pone.0175942
Publisher URL
http://journals.plos.org/plosone/article?id=10.1371%2Fjournal.pone.0175942
Scopus
85017562035
Mendeley
http://www.mendeley.com/research/savanna-elephant-numbers-only-quarter-expected-values
Events
Loading … Spinner

Mendeley | Further Information

{"title"=>"Savanna elephant numbers are only a quarter of their expected values", "type"=>"journal", "authors"=>[{"first_name"=>"Ashley S.", "last_name"=>"Robson", "scopus_author_id"=>"57192401345"}, {"first_name"=>"Morgan J.", "last_name"=>"Trimble", "scopus_author_id"=>"34973622000"}, {"first_name"=>"Andrew", "last_name"=>"Purdon", "scopus_author_id"=>"57193243115"}, {"first_name"=>"Kim D.", "last_name"=>"Young-Overton", "scopus_author_id"=>"56441772600"}, {"first_name"=>"Stuart L.", "last_name"=>"Pimm", "scopus_author_id"=>"7006131065"}, {"first_name"=>"Rudi J.", "last_name"=>"Van Aarde", "scopus_author_id"=>"35552019800"}], "year"=>2017, "source"=>"PLoS ONE", "identifiers"=>{"issn"=>"19326203", "scopus"=>"2-s2.0-85017562035", "pui"=>"615402119", "doi"=>"10.1371/journal.pone.0175942", "isbn"=>"1111111111", "sgr"=>"85017562035"}, "id"=>"b0b8ff5d-ea6d-37c5-9981-cf03ddd19448", "abstract"=>"Savannas once constituted the range of many species that human encroachment has now reduced to a fraction of their former distribution. Many survive only in protected areas. Poaching reduces the savanna elephant, even where protected, likely to the detriment of savanna ecosystems. While resources go into estimating elephant populations, an ecological benchmark by which to assess counts is lacking. Knowing how many elephants there are and how many poachers kill is important, but on their own, such data lack context. We collated savanna elephant count data from 73 protected areas across the continent estimated to hold ~50% of Africa’s elephants and extracted densities from 18 broadly stable population time series. We modeled these densities using primary productivity, water availability, and an index of poaching as predictors. We then used the model to predict stable densities given current conditions and poaching for all 73 populations. Next, to generate ecological benchmarks, we predicted such densities for a scenario of zero poaching. Where historical data are available, they corroborate or exceed benchmarks. According to recent counts, collectively, the 73 savanna elephant populations are at 75% of the size predicted based on current conditions and poaching levels. However, populations are at <25% of ecological benchmarks given a scenario of zero poaching (~967,000)—a total deficit of ~730,000 elephants. Populations in 30% of the 73 protected areas were <5% of their benchmarks, and the median current density as a percentage of ecological benchmark across protected areas was just 13%. The ecological context provided by these benchmark values, in conjunction with ongoing census projects, allow efficient targeting of conservation efforts.", "link"=>"http://www.mendeley.com/research/savanna-elephant-numbers-only-quarter-expected-values", "reader_count"=>64, "reader_count_by_academic_status"=>{"Unspecified"=>3, "Librarian"=>2, "Student > Doctoral Student"=>1, "Researcher"=>11, "Student > Ph. D. Student"=>13, "Student > Postgraduate"=>4, "Student > Master"=>5, "Other"=>5, "Student > Bachelor"=>13, "Lecturer"=>1, "Professor"=>3}, "reader_count_by_user_role"=>{"Unspecified"=>3, "Librarian"=>2, "Student > Doctoral Student"=>1, "Researcher"=>11, "Student > Ph. D. Student"=>13, "Student > Postgraduate"=>4, "Student > Master"=>5, "Other"=>5, "Student > Bachelor"=>13, "Lecturer"=>1, "Professor"=>3}, "reader_count_by_subject_area"=>{"Unspecified"=>3, "Environmental Science"=>21, "Biochemistry, Genetics and Molecular Biology"=>5, "Agricultural and Biological Sciences"=>25, "Psychology"=>1, "Social Sciences"=>1, "Computer Science"=>2, "Earth and Planetary Sciences"=>3}, "reader_count_by_subdiscipline"=>{"Social Sciences"=>{"Social Sciences"=>1}, "Psychology"=>{"Psychology"=>1}, "Earth and Planetary Sciences"=>{"Earth and Planetary Sciences"=>3}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>25}, "Computer Science"=>{"Computer Science"=>2}, "Biochemistry, Genetics and Molecular Biology"=>{"Biochemistry, Genetics and Molecular Biology"=>5}, "Unspecified"=>{"Unspecified"=>3}, "Environmental Science"=>{"Environmental Science"=>21}}, "reader_count_by_country"=>{"Italy"=>1, "United Kingdom"=>1}, "group_count"=>1}

Scopus | Further Information

{"@_fa"=>"true", "link"=>[{"@_fa"=>"true", "@ref"=>"self", "@href"=>"https://api.elsevier.com/content/abstract/scopus_id/85017562035"}, {"@_fa"=>"true", "@ref"=>"author-affiliation", "@href"=>"https://api.elsevier.com/content/abstract/scopus_id/85017562035?field=author,affiliation"}, {"@_fa"=>"true", "@ref"=>"scopus", "@href"=>"https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85017562035&origin=inward"}, {"@_fa"=>"true", "@ref"=>"scopus-citedby", "@href"=>"https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85017562035&origin=inward"}], "prism:url"=>"https://api.elsevier.com/content/abstract/scopus_id/85017562035", "dc:identifier"=>"SCOPUS_ID:85017562035", "eid"=>"2-s2.0-85017562035", "dc:title"=>"Savanna elephant numbers are only a quarter of their expected values", "dc:creator"=>"Robson A.", "prism:publicationName"=>"PLoS ONE", "prism:eIssn"=>"19326203", "prism:volume"=>"12", "prism:issueIdentifier"=>"4", "prism:pageRange"=>nil, "prism:coverDate"=>"2017-04-01", "prism:coverDisplayDate"=>"April 2017", "prism:doi"=>"10.1371/journal.pone.0175942", "citedby-count"=>"13", "affiliation"=>[{"@_fa"=>"true", "affilname"=>"Universiteit van Pretoria", "affiliation-city"=>"Pretoria", "affiliation-country"=>"South Africa"}], "pubmed-id"=>"28414784", "prism:aggregationType"=>"Journal", "subtype"=>"ar", "subtypeDescription"=>"Article", "article-number"=>"e0175942", "source-id"=>"10600153309", "openaccess"=>"1", "openaccessFlag"=>true}

Article Coverage Curated

Twitter

Counter

  • {"month"=>"4", "year"=>"2017", "pdf_views"=>"679", "xml_views"=>"17", "html_views"=>"4104"}
  • {"month"=>"5", "year"=>"2017", "pdf_views"=>"88", "xml_views"=>"2", "html_views"=>"606"}
  • {"month"=>"6", "year"=>"2017", "pdf_views"=>"26", "xml_views"=>"1", "html_views"=>"200"}
  • {"month"=>"7", "year"=>"2017", "pdf_views"=>"49", "xml_views"=>"1", "html_views"=>"130"}
  • {"month"=>"8", "year"=>"2017", "pdf_views"=>"66", "xml_views"=>"3", "html_views"=>"235"}
  • {"month"=>"9", "year"=>"2017", "pdf_views"=>"51", "xml_views"=>"2", "html_views"=>"200"}
  • {"month"=>"10", "year"=>"2017", "pdf_views"=>"31", "xml_views"=>"0", "html_views"=>"188"}
  • {"month"=>"11", "year"=>"2017", "pdf_views"=>"28", "xml_views"=>"0", "html_views"=>"268"}
  • {"month"=>"12", "year"=>"2017", "pdf_views"=>"13", "xml_views"=>"1", "html_views"=>"220"}
  • {"month"=>"1", "year"=>"2018", "pdf_views"=>"8", "xml_views"=>"0", "html_views"=>"92"}
  • {"month"=>"2", "year"=>"2018", "pdf_views"=>"30", "xml_views"=>"0", "html_views"=>"131"}
  • {"month"=>"3", "year"=>"2018", "pdf_views"=>"42", "xml_views"=>"3", "html_views"=>"145"}
  • {"month"=>"4", "year"=>"2018", "pdf_views"=>"26", "xml_views"=>"2", "html_views"=>"130"}
  • {"month"=>"5", "year"=>"2018", "pdf_views"=>"27", "xml_views"=>"3", "html_views"=>"129"}
  • {"month"=>"6", "year"=>"2018", "pdf_views"=>"17", "xml_views"=>"5", "html_views"=>"57"}
  • {"month"=>"7", "year"=>"2018", "pdf_views"=>"14", "xml_views"=>"4", "html_views"=>"65"}
  • {"month"=>"8", "year"=>"2018", "pdf_views"=>"19", "xml_views"=>"1", "html_views"=>"60"}
  • {"month"=>"9", "year"=>"2018", "pdf_views"=>"39", "xml_views"=>"0", "html_views"=>"85"}
  • {"month"=>"10", "year"=>"2018", "pdf_views"=>"26", "xml_views"=>"1", "html_views"=>"132"}
  • {"month"=>"11", "year"=>"2018", "pdf_views"=>"30", "xml_views"=>"0", "html_views"=>"149"}
  • {"month"=>"12", "year"=>"2018", "pdf_views"=>"12", "xml_views"=>"0", "html_views"=>"53"}
  • {"month"=>"1", "year"=>"2019", "pdf_views"=>"17", "xml_views"=>"1", "html_views"=>"66"}
  • {"month"=>"2", "year"=>"2019", "pdf_views"=>"17", "xml_views"=>"1", "html_views"=>"63"}
  • {"month"=>"3", "year"=>"2019", "pdf_views"=>"31", "xml_views"=>"0", "html_views"=>"40"}
  • {"month"=>"4", "year"=>"2019", "pdf_views"=>"29", "xml_views"=>"0", "html_views"=>"55"}
  • {"month"=>"5", "year"=>"2019", "pdf_views"=>"29", "xml_views"=>"0", "html_views"=>"49"}
  • {"month"=>"6", "year"=>"2019", "pdf_views"=>"20", "xml_views"=>"0", "html_views"=>"27"}
  • {"month"=>"7", "year"=>"2019", "pdf_views"=>"6", "xml_views"=>"0", "html_views"=>"12"}

PMC Usage Stats

  • {"unique-ip"=>"12", "full-text"=>"10", "pdf"=>"2", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"11", "supp-data"=>"1", "cited-by"=>"0", "year"=>"2017", "month"=>"5"}
  • {"unique-ip"=>"4", "full-text"=>"4", "pdf"=>"0", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2017", "month"=>"6"}
  • {"unique-ip"=>"6", "full-text"=>"5", "pdf"=>"4", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2017", "month"=>"7"}
  • {"unique-ip"=>"5", "full-text"=>"3", "pdf"=>"1", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"2", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2017", "month"=>"8"}
  • {"unique-ip"=>"11", "full-text"=>"11", "pdf"=>"1", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2017", "month"=>"9"}
  • {"unique-ip"=>"17", "full-text"=>"17", "pdf"=>"5", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2017", "month"=>"10"}
  • {"unique-ip"=>"2", "full-text"=>"2", "pdf"=>"1", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"1", "cited-by"=>"0", "year"=>"2017", "month"=>"11"}
  • {"unique-ip"=>"4", "full-text"=>"5", "pdf"=>"1", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"5", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2017", "month"=>"12"}
  • {"unique-ip"=>"7", "full-text"=>"8", "pdf"=>"1", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2018", "month"=>"1"}
  • {"unique-ip"=>"21", "full-text"=>"24", "pdf"=>"5", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"3", "supp-data"=>"1", "cited-by"=>"0", "year"=>"2018", "month"=>"3"}
  • {"unique-ip"=>"14", "full-text"=>"15", "pdf"=>"1", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2019", "month"=>"1"}
  • {"unique-ip"=>"8", "full-text"=>"7", "pdf"=>"2", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2018", "month"=>"9"}
  • {"unique-ip"=>"18", "full-text"=>"19", "pdf"=>"2", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2018", "month"=>"12"}
  • {"unique-ip"=>"29", "full-text"=>"41", "pdf"=>"2", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"6", "supp-data"=>"1", "cited-by"=>"0", "year"=>"2018", "month"=>"4"}
  • {"unique-ip"=>"20", "full-text"=>"22", "pdf"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2018", "month"=>"5"}
  • {"unique-ip"=>"12", "full-text"=>"12", "pdf"=>"3", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2018", "month"=>"6"}
  • {"unique-ip"=>"25", "full-text"=>"30", "pdf"=>"3", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"1", "cited-by"=>"0", "year"=>"2018", "month"=>"11"}
  • {"unique-ip"=>"9", "full-text"=>"9", "pdf"=>"1", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"1", "cited-by"=>"0", "year"=>"2018", "month"=>"7"}
  • {"unique-ip"=>"15", "full-text"=>"14", "pdf"=>"2", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2018", "month"=>"10"}
  • {"unique-ip"=>"20", "full-text"=>"24", "pdf"=>"2", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2018", "month"=>"8"}
  • {"unique-ip"=>"17", "full-text"=>"16", "pdf"=>"1", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2019", "month"=>"2"}
  • {"unique-ip"=>"14", "full-text"=>"14", "pdf"=>"5", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"1", "supp-data"=>"1", "cited-by"=>"0", "year"=>"2019", "month"=>"3"}
  • {"unique-ip"=>"16", "full-text"=>"15", "pdf"=>"4", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"1", "cited-by"=>"0", "year"=>"2019", "month"=>"4"}
  • {"unique-ip"=>"18", "full-text"=>"18", "pdf"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2019", "month"=>"5"}
Loading … Spinner
There are currently no alerts