Trends in Extinction Risk for Imperiled Species in Canada
Publication Date
November 17, 2014
Journal
PLOS ONE
Authors
Brett Favaro, Danielle C. Claar, Caroline H. Fox, Cameron Freshwater, et al
Volume
9
Issue
11
Pages
e113118
DOI
https://dx.plos.org/10.1371/journal.pone.0113118
Publisher URL
http://journals.plos.org/plosone/article?id=10.1371%2Fjournal.pone.0113118
PubMed
http://www.ncbi.nlm.nih.gov/pubmed/25401772
PubMed Central
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4234741
Europe PMC
http://europepmc.org/abstract/MED/25401772
Web of Science
000345158700115
Scopus
84913556455
Mendeley
http://www.mendeley.com/research/trends-extinction-risk-imperiled-species-canada
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Mendeley | Further Information

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Scopus | Further Information

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Figshare

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  • {"files"=>["https://ndownloader.figshare.com/files/1797940", "https://ndownloader.figshare.com/files/1797941"], "description"=>"<div><p>Protecting and promoting recovery of species at risk of extinction is a critical component of biodiversity conservation. In Canada, the Committee on the Status of Endangered Wildlife in Canada (COSEWIC) determines whether species are at risk of extinction or extirpation, and has conducted these assessments since 1977. We examined trends in COSEWIC assessments to identify whether at-risk species that have been assessed more than once tended to improve, remain constant, or deteriorate in status, as a way of assessing the effectiveness of biodiversity conservation in Canada. Of 369 species that met our criteria for examination, 115 deteriorated, 202 remained unchanged, and 52 improved in status. Only 20 species (5.4%) improved to the point where they were ‘not at risk’, and five of those were due to increased sampling efforts rather than an increase in population size. Species outcomes were also dependent on the severity of their initial assessment; for example, 47% of species that were initially listed as special concern deteriorated between assessments. After receiving an at-risk assessment by COSEWIC, a species is considered for listing under the federal Species at Risk Act (SARA), which is the primary national tool that mandates protection for at-risk species. We examined whether SARA-listing was associated with improved COSEWIC assessment outcomes relative to unlisted species. Of 305 species that had multiple assessments and were SARA-listed, 221 were listed at a level that required identification and protection of critical habitat; however, critical habitat was fully identified for only 56 of these species. We suggest that the Canadian government should formally identify and protect critical habitat, as is required by existing legislation. In addition, our finding that at-risk species in Canada rarely recover leads us to recommend that every effort be made to actively prevent species from becoming at-risk in the first place.</p></div>", "links"=>[], "tags"=>["species", "COSEWIC assessment outcomes", "biodiversity conservation", "sara"], "article_id"=>1244654, "categories"=>["Biological Sciences", "Science Policy", "Ecology"], "users"=>["Brett Favaro", "Danielle C. Claar", "Caroline H. Fox", "Cameron Freshwater", "Jessica J. Holden", "Allan Roberts"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0113118.s001", "https://dx.doi.org/10.1371/journal.pone.0113118.s002"], "stats"=>{"downloads"=>1, "page_views"=>34, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Trends_in_Extinction_Risk_for_Imperiled_Species_in_Canada_/1244654", "title"=>"Trends in Extinction Risk for Imperiled Species in Canada", "pos_in_sequence"=>0, "defined_type"=>4, "published_date"=>"2014-11-17 03:38:42"}
  • {"files"=>["https://ndownloader.figshare.com/files/1797937"], "description"=>"<p>Values under bars indicate the number of species in each taxonomic category.</p>", "links"=>[], "tags"=>["species", "COSEWIC assessment outcomes", "biodiversity conservation", "sara"], "article_id"=>1244651, "categories"=>["Biological Sciences", "Science Policy", "Ecology"], "users"=>["Brett Favaro", "Danielle C. Claar", "Caroline H. Fox", "Cameron Freshwater", "Jessica J. Holden", "Allan Roberts"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0113118.g004", "stats"=>{"downloads"=>2, "page_views"=>40, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Proportion_of_SARA_listed_species_listed_as_extirpated_endangered_or_threatened_that_have_critical_habitat_CH_fully_identified_light_green_partially_identified_dark_green_or_not_at_all_identified_dark_red_overall_and_by_taxonomic_group_/1244651", "title"=>"Proportion of SARA-listed species (listed as extirpated, endangered, or threatened) that have critical habitat (CH) fully identified (light green), partially identified (dark green), or not at all identified (dark red), overall and by taxonomic group.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-11-17 03:38:42"}
  • {"files"=>["https://ndownloader.figshare.com/files/1797936"], "description"=>"<p>Proportions are grouped by initial assessment status (column). Change from first to final assessment is indicated on the Y axis, and colours indicate the final assessment status. For example, of species that were initially assessed as threatened (third column), 19 of them (or a proportion of 0.2) improved by one status level (+1 on Y-axis), ultimately placing them into the special concern category (yellow).</p>", "links"=>[], "tags"=>["species", "COSEWIC assessment outcomes", "biodiversity conservation", "sara"], "article_id"=>1244650, "categories"=>["Biological Sciences", "Science Policy", "Ecology"], "users"=>["Brett Favaro", "Danielle C. Claar", "Caroline H. Fox", "Cameron Freshwater", "Jessica J. Holden", "Allan Roberts"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0113118.g003", "stats"=>{"downloads"=>1, "page_views"=>21, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Trends_in_COSEWIC_statuses_for_each_species_grouped_by_initial_assessments_/1244650", "title"=>"Trends in COSEWIC statuses for each species, grouped by initial assessments.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-11-17 03:38:42"}
  • {"files"=>["https://ndownloader.figshare.com/files/1797910"], "description"=>"<p>Each species is represented by points (assessment date and outcome) connected by lines. Species that deteriorated in status from their first to final COSEWIC assessments are red, species that have improved are blue, and species that have remained constant are black. The vertical dotted line indicates 2003, or the passing of SARA. Species whose apparent recovery was due to increased sampling effort, and not biological recovery (N = 20) are not shown.</p>", "links"=>[], "tags"=>["species", "COSEWIC assessment outcomes", "biodiversity conservation", "sara"], "article_id"=>1244627, "categories"=>["Biological Sciences", "Science Policy", "Ecology"], "users"=>["Brett Favaro", "Danielle C. Claar", "Caroline H. Fox", "Cameron Freshwater", "Jessica J. Holden", "Allan Roberts"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0113118.g001", "stats"=>{"downloads"=>3, "page_views"=>16, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Overview_of_COSEWIC_assessment_statuses_for_all_species_that_have_been_assessed_more_than_once_and_that_have_never_been_data_deficient_or_taxonomically_reassigned_/1244627", "title"=>"Overview of COSEWIC assessment statuses for all species that have been assessed more than once, and that have never been data deficient or taxonomically reassigned.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-11-17 03:38:42"}
  • {"files"=>["https://ndownloader.figshare.com/files/1797922"], "description"=>"<p>Positive numbers indicate improvement (e.g. a transition from endangered to threatened would be +1, while endangered to special concern would be +2), negative numbers indicate deterioration, and zero indicates no change across assessments. Red bars indicate apparent recoveries due to increased sampling efforts. Note that the y-axis for vascular plants is scaled differently from other taxonomic groups.</p>", "links"=>[], "tags"=>["species", "COSEWIC assessment outcomes", "biodiversity conservation", "sara"], "article_id"=>1244639, "categories"=>["Biological Sciences", "Science Policy", "Ecology"], "users"=>["Brett Favaro", "Danielle C. Claar", "Caroline H. Fox", "Cameron Freshwater", "Jessica J. Holden", "Allan Roberts"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0113118.g002", "stats"=>{"downloads"=>0, "page_views"=>30, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Frequencies_of_occurrence_of_change_in_COSEWIC_assessed_status_for_each_taxonomic_group_/1244639", "title"=>"Frequencies of occurrence of change in COSEWIC assessed status for each taxonomic group.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-11-17 03:38:42"}

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Relative Metric

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