Disturbance factors influencing greater sage‐grouse lek abandonment in north‐central Wyoming
Identifieur interne : 000F05 ( Istex/Corpus ); précédent : 000F04; suivant : 000F06Disturbance factors influencing greater sage‐grouse lek abandonment in north‐central Wyoming
Auteurs : Jennifer E. Hess ; Jeffrey L. BeckSource :
- The Journal of Wildlife Management [ 0022-541X ] ; 2012-11.
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- KwdEn :
Abstract
Detecting the disappearance of active leks is the most efficient way to determine large declines in greater sage‐grouse (Centrocercus urophasianus) populations; thus, understanding factors that influence lek abandonment is critical. We evaluated factors that may have influenced the probability of sage‐grouse lek abandonment in the Bighorn Basin (BHB) of north‐central Wyoming from 1980 to 2009. Our objective was to examine lek abandonment based on landscape characteristics that explain differences between occupied and unoccupied leks. We evaluated lek abandonment from 144 occupied and 39 unoccupied leks from the Wyoming Game and Fish Department lek database with sufficient data for our 30‐year analysis. We conducted our analysis with binary logistic regression using landscape predictor variables obtained from geographic coverages at 5 scales (1.0‐, 3.2‐, 4.0‐, 5.0‐, and 6.4‐km radii around leks) to evaluate how these disturbances have influenced lek abandonment. Coverages included anthropogenic characteristics such as agricultural development, oil and gas development, prescribed burned treatments, and roads; and environmental characteristics such as vegetation attributes and wildfire. Our combined model included the number of oil and gas wells in a 1.0‐km radius, percent area of wildfire in a 1.0‐km radius, and variability in shrub height in a 1.0‐km radius around sage‐grouse leks. Abandoned (unoccupied) leks had 1.1‐times the variability of shrub height in a 1.0‐km radius, 3.1‐times the percentage of wildfire in a 1.0‐km radius, and 10.3‐times the number of oil and gas wells in a 1.0‐km radius compared to occupied leks. The model‐averaged odds of lek persistence with every 1 unit increase in oil and gas wells within a 1.0‐km radius was 0.66 (90% CI: 0.37–0.94), odds with every 1% increase in wildfire in a 1.0‐km radius was 0.99 (90% CI: 0.85–1.12), and odds with every 1 unit increase in the standard deviation of shrub height within a 1.0‐km radius around a lek was 0.77 (90% CI: 0.45–1.08). Because the 90% confidence intervals around the odds ratios of wells did not overlap 1.0, we suggest this predictor variable was most influential in our model‐averaged estimates. The BHB has lower developed reserves of oil and gas than many other regions; however, our study supports findings from other studies that demonstrate energy development increases lek abandonment. Our findings indicate conservation efforts should be focused on minimizing well development and implementing wildfire suppression tactics near active sage‐grouse leks. © 2012 The Wildlife Society.
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DOI: 10.1002/jwmg.417
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Beck</name><affiliation><mods:affiliation>Department of Ecosystem Science and Management, University of Wyoming, Dept 3354, 1000 East University Avenue, Laramie, WY 82071, USA</mods:affiliation></affiliation></author></analytic><monogr></monogr><series><title level="j">The Journal of Wildlife Management</title><title level="j" type="abbrev">The Journal of Wildlife Management</title><idno type="ISSN">0022-541X</idno><idno type="eISSN">1937-2817</idno><imprint><publisher>John Wiley & Sons, Inc.</publisher><pubPlace>Hoboken, USA</pubPlace><date type="published" when="2012-11">2012-11</date><biblScope unit="volume">76</biblScope><biblScope unit="issue">8</biblScope><biblScope unit="page" from="1625">1625</biblScope><biblScope unit="page" to="1634">1634</biblScope></imprint><idno type="ISSN">0022-541X</idno></series><idno type="istex">40A1C599F81AD99879B16BD7EA785DC792214019</idno><idno type="DOI">10.1002/jwmg.417</idno><idno type="ArticleID">JWMG417</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0022-541X</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Centrocercus urophasianus</term><term>big sagebrush</term><term>cumulative disturbance factors</term><term>energy development</term><term>greater sage‐grouse</term><term>lek abandonment</term><term>shrubs</term><term>wildfire</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Detecting the disappearance of active leks is the most efficient way to determine large declines in greater sage‐grouse (Centrocercus urophasianus) populations; thus, understanding factors that influence lek abandonment is critical. We evaluated factors that may have influenced the probability of sage‐grouse lek abandonment in the Bighorn Basin (BHB) of north‐central Wyoming from 1980 to 2009. Our objective was to examine lek abandonment based on landscape characteristics that explain differences between occupied and unoccupied leks. We evaluated lek abandonment from 144 occupied and 39 unoccupied leks from the Wyoming Game and Fish Department lek database with sufficient data for our 30‐year analysis. We conducted our analysis with binary logistic regression using landscape predictor variables obtained from geographic coverages at 5 scales (1.0‐, 3.2‐, 4.0‐, 5.0‐, and 6.4‐km radii around leks) to evaluate how these disturbances have influenced lek abandonment. Coverages included anthropogenic characteristics such as agricultural development, oil and gas development, prescribed burned treatments, and roads; and environmental characteristics such as vegetation attributes and wildfire. Our combined model included the number of oil and gas wells in a 1.0‐km radius, percent area of wildfire in a 1.0‐km radius, and variability in shrub height in a 1.0‐km radius around sage‐grouse leks. Abandoned (unoccupied) leks had 1.1‐times the variability of shrub height in a 1.0‐km radius, 3.1‐times the percentage of wildfire in a 1.0‐km radius, and 10.3‐times the number of oil and gas wells in a 1.0‐km radius compared to occupied leks. The model‐averaged odds of lek persistence with every 1 unit increase in oil and gas wells within a 1.0‐km radius was 0.66 (90% CI: 0.37–0.94), odds with every 1% increase in wildfire in a 1.0‐km radius was 0.99 (90% CI: 0.85–1.12), and odds with every 1 unit increase in the standard deviation of shrub height within a 1.0‐km radius around a lek was 0.77 (90% CI: 0.45–1.08). Because the 90% confidence intervals around the odds ratios of wells did not overlap 1.0, we suggest this predictor variable was most influential in our model‐averaged estimates. The BHB has lower developed reserves of oil and gas than many other regions; however, our study supports findings from other studies that demonstrate energy development increases lek abandonment. Our findings indicate conservation efforts should be focused on minimizing well development and implementing wildfire suppression tactics near active sage‐grouse leks. © 2012 The Wildlife Society.</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>Jennifer E. Hess</name><affiliations><json:string>Department of Ecosystem Science and Management, University of Wyoming, Dept 3354, 1000 East University Avenue, Laramie, WY 82071, USA</json:string><json:string>Current Address: Hayden‐Wing Associates, LLC, 2308 South 8th Street, P.O. Box 1689, Laramie, WY 82073, USA.</json:string><json:string>Department of Ecosystem Science and Management, University of Wyoming, Dept 3354, 1000 East University Avenue, Laramie, WY 82071, USA</json:string></affiliations></json:item><json:item><name>Jeffrey L. Beck</name><affiliations><json:string>Department of Ecosystem Science and Management, University of Wyoming, Dept 3354, 1000 East University Avenue, Laramie, WY 82071, USA</json:string></affiliations></json:item></author><subject><json:item><lang><json:string>eng</json:string></lang><value>big sagebrush</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Centrocercus urophasianus</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>cumulative disturbance factors</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>energy development</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>greater sage‐grouse</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>lek abandonment</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>shrubs</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>wildfire</value></json:item></subject><articleId><json:string>JWMG417</json:string></articleId><language><json:string>eng</json:string></language><originalGenre><json:string>article</json:string></originalGenre><abstract>Detecting the disappearance of active leks is the most efficient way to determine large declines in greater sage‐grouse (Centrocercus urophasianus) populations; thus, understanding factors that influence lek abandonment is critical. We evaluated factors that may have influenced the probability of sage‐grouse lek abandonment in the Bighorn Basin (BHB) of north‐central Wyoming from 1980 to 2009. Our objective was to examine lek abandonment based on landscape characteristics that explain differences between occupied and unoccupied leks. We evaluated lek abandonment from 144 occupied and 39 unoccupied leks from the Wyoming Game and Fish Department lek database with sufficient data for our 30‐year analysis. We conducted our analysis with binary logistic regression using landscape predictor variables obtained from geographic coverages at 5 scales (1.0‐, 3.2‐, 4.0‐, 5.0‐, and 6.4‐km radii around leks) to evaluate how these disturbances have influenced lek abandonment. Coverages included anthropogenic characteristics such as agricultural development, oil and gas development, prescribed burned treatments, and roads; and environmental characteristics such as vegetation attributes and wildfire. Our combined model included the number of oil and gas wells in a 1.0‐km radius, percent area of wildfire in a 1.0‐km radius, and variability in shrub height in a 1.0‐km radius around sage‐grouse leks. Abandoned (unoccupied) leks had 1.1‐times the variability of shrub height in a 1.0‐km radius, 3.1‐times the percentage of wildfire in a 1.0‐km radius, and 10.3‐times the number of oil and gas wells in a 1.0‐km radius compared to occupied leks. The model‐averaged odds of lek persistence with every 1 unit increase in oil and gas wells within a 1.0‐km radius was 0.66 (90% CI: 0.37–0.94), odds with every 1% increase in wildfire in a 1.0‐km radius was 0.99 (90% CI: 0.85–1.12), and odds with every 1 unit increase in the standard deviation of shrub height within a 1.0‐km radius around a lek was 0.77 (90% CI: 0.45–1.08). Because the 90% confidence intervals around the odds ratios of wells did not overlap 1.0, we suggest this predictor variable was most influential in our model‐averaged estimates. The BHB has lower developed reserves of oil and gas than many other regions; however, our study supports findings from other studies that demonstrate energy development increases lek abandonment. Our findings indicate conservation efforts should be focused on minimizing well development and implementing wildfire suppression tactics near active sage‐grouse leks. © 2012 The Wildlife Society.</abstract><qualityIndicators><score>8</score><pdfVersion>1.3</pdfVersion><pdfPageSize>594 x 792 pts</pdfPageSize><refBibsNative>true</refBibsNative><abstractCharCount>2596</abstractCharCount><pdfWordCount>7790</pdfWordCount><pdfCharCount>49700</pdfCharCount><pdfPageCount>10</pdfPageCount><abstractWordCount>388</abstractWordCount></qualityIndicators><title>Disturbance factors influencing greater sage‐grouse lek abandonment in north‐central Wyoming</title><genre><json:string>article</json:string></genre><host><volume>76</volume><publisherId><json:string>JWMG</json:string></publisherId><pages><total>10</total><last>1634</last><first>1625</first></pages><issn><json:string>0022-541X</json:string></issn><issue>8</issue><subject><json:item><value>Management and Conservation</value></json:item></subject><genre><json:string>journal</json:string></genre><language><json:string>unknown</json:string></language><eissn><json:string>1937-2817</json:string></eissn><title>The Journal of Wildlife Management</title><doi><json:string>10.1002/(ISSN)1937-2817</json:string></doi></host><categories><wos><json:string>science</json:string><json:string>zoology</json:string><json:string>ecology</json:string></wos><scienceMetrix><json:string>natural sciences</json:string><json:string>biology</json:string><json:string>ecology</json:string></scienceMetrix></categories><publicationDate>2012</publicationDate><copyrightDate>2012</copyrightDate><doi><json:string>10.1002/jwmg.417</json:string></doi><id>40A1C599F81AD99879B16BD7EA785DC792214019</id><score>0.040223107</score><fulltext><json:item><extension>pdf</extension><original>true</original><mimetype>application/pdf</mimetype><uri>https://api.istex.fr/document/40A1C599F81AD99879B16BD7EA785DC792214019/fulltext/pdf</uri></json:item><json:item><extension>zip</extension><original>false</original><mimetype>application/zip</mimetype><uri>https://api.istex.fr/document/40A1C599F81AD99879B16BD7EA785DC792214019/fulltext/zip</uri></json:item><istex:fulltextTEI uri="https://api.istex.fr/document/40A1C599F81AD99879B16BD7EA785DC792214019/fulltext/tei"><teiHeader><fileDesc><titleStmt><title level="a" type="main" xml:lang="en">Disturbance factors influencing greater sage‐grouse lek abandonment in north‐central Wyoming</title></titleStmt><publicationStmt><authority>ISTEX</authority><publisher>John Wiley & Sons, Inc.</publisher><pubPlace>Hoboken, USA</pubPlace><availability><p>Copyright © The Wildlife Society, 2012</p></availability><date>2012</date></publicationStmt><notesStmt><note type="content">*Associate Editor: Christopher K. 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Box 1689, Laramie, WY 82073, USA.</affiliation><affiliation>Department of Ecosystem Science and Management, University of Wyoming, Dept 3354, 1000 East University Avenue, Laramie, WY 82071, USA</affiliation></author><author xml:id="author-2"><persName><forename type="first">Jeffrey L.</forename><surname>Beck</surname></persName><affiliation>Department of Ecosystem Science and Management, University of Wyoming, Dept 3354, 1000 East University Avenue, Laramie, WY 82071, USA</affiliation></author></analytic><monogr><title level="j">The Journal of Wildlife Management</title><title level="j" type="abbrev">The Journal of Wildlife Management</title><idno type="pISSN">0022-541X</idno><idno type="eISSN">1937-2817</idno><idno type="DOI">10.1002/(ISSN)1937-2817</idno><imprint><publisher>John Wiley & Sons, Inc.</publisher><pubPlace>Hoboken, USA</pubPlace><date type="published" when="2012-11"></date><biblScope unit="volume">76</biblScope><biblScope unit="issue">8</biblScope><biblScope unit="page" from="1625">1625</biblScope><biblScope unit="page" to="1634">1634</biblScope></imprint></monogr><idno type="istex">40A1C599F81AD99879B16BD7EA785DC792214019</idno><idno type="DOI">10.1002/jwmg.417</idno><idno type="ArticleID">JWMG417</idno></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>2012</date></creation><langUsage><language ident="en">en</language></langUsage><abstract xml:lang="en"><p>Detecting the disappearance of active leks is the most efficient way to determine large declines in greater sage‐grouse (Centrocercus urophasianus) populations; thus, understanding factors that influence lek abandonment is critical. We evaluated factors that may have influenced the probability of sage‐grouse lek abandonment in the Bighorn Basin (BHB) of north‐central Wyoming from 1980 to 2009. Our objective was to examine lek abandonment based on landscape characteristics that explain differences between occupied and unoccupied leks. We evaluated lek abandonment from 144 occupied and 39 unoccupied leks from the Wyoming Game and Fish Department lek database with sufficient data for our 30‐year analysis. We conducted our analysis with binary logistic regression using landscape predictor variables obtained from geographic coverages at 5 scales (1.0‐, 3.2‐, 4.0‐, 5.0‐, and 6.4‐km radii around leks) to evaluate how these disturbances have influenced lek abandonment. Coverages included anthropogenic characteristics such as agricultural development, oil and gas development, prescribed burned treatments, and roads; and environmental characteristics such as vegetation attributes and wildfire. Our combined model included the number of oil and gas wells in a 1.0‐km radius, percent area of wildfire in a 1.0‐km radius, and variability in shrub height in a 1.0‐km radius around sage‐grouse leks. Abandoned (unoccupied) leks had 1.1‐times the variability of shrub height in a 1.0‐km radius, 3.1‐times the percentage of wildfire in a 1.0‐km radius, and 10.3‐times the number of oil and gas wells in a 1.0‐km radius compared to occupied leks. The model‐averaged odds of lek persistence with every 1 unit increase in oil and gas wells within a 1.0‐km radius was 0.66 (90% CI: 0.37–0.94), odds with every 1% increase in wildfire in a 1.0‐km radius was 0.99 (90% CI: 0.85–1.12), and odds with every 1 unit increase in the standard deviation of shrub height within a 1.0‐km radius around a lek was 0.77 (90% CI: 0.45–1.08). Because the 90% confidence intervals around the odds ratios of wells did not overlap 1.0, we suggest this predictor variable was most influential in our model‐averaged estimates. The BHB has lower developed reserves of oil and gas than many other regions; however, our study supports findings from other studies that demonstrate energy development increases lek abandonment. Our findings indicate conservation efforts should be focused on minimizing well development and implementing wildfire suppression tactics near active sage‐grouse leks. © 2012 The Wildlife Society.</p></abstract><textClass xml:lang="en"><keywords scheme="keyword"><list><head>keywords</head><item><term>big sagebrush</term></item><item><term>Centrocercus urophasianus</term></item><item><term>cumulative disturbance factors</term></item><item><term>energy development</term></item><item><term>greater sage‐grouse</term></item><item><term>lek abandonment</term></item><item><term>shrubs</term></item><item><term>wildfire</term></item></list></keywords></textClass><textClass><keywords scheme="Journal Subject"><list><head>article-category</head><item><term>Management and Conservation</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="2010-10-27">Received</change><change when="2012-04-30">Registration</change><change 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href="file:JWMG.JWMG417.pdf"></link></linkGroup></publicationMeta><contentMeta><countGroup><count type="figureTotal" number="3"></count><count type="tableTotal" number="4"></count><count type="referenceTotal" number="75"></count><count type="wordTotal" number="9289"></count></countGroup><titleGroup><title type="main" xml:lang="en">Disturbance factors influencing greater sage‐grouse lek abandonment in north‐central Wyoming<link href="#fn1"></link></title><title type="short" xml:lang="en">Greater Sage‐Grouse Lek Abandonment</title></titleGroup><creators><creator xml:id="au1" creatorRole="author" affiliationRef="#af1" currentRef="#curr1" corresponding="yes"><personName><givenNames>Jennifer E.</givenNames><familyName>Hess</familyName></personName><contactDetails><email>jhess5@uwyo.edu</email></contactDetails></creator><creator xml:id="au2" creatorRole="author" affiliationRef="#af1"><personName><givenNames>Jeffrey L.</givenNames><familyName>Beck</familyName></personName></creator></creators><affiliationGroup><affiliation xml:id="af1" countryCode="US" type="organization"><unparsedAffiliation>Department of Ecosystem Science and Management, University of Wyoming, Dept 3354, 1000 East University Avenue, Laramie, WY 82071, USA</unparsedAffiliation></affiliation><affiliation xml:id="curr1"><unparsedAffiliation>Hayden‐Wing Associates, LLC, 2308 South 8th Street, P.O. Box 1689, Laramie, WY 82073, USA.</unparsedAffiliation></affiliation></affiliationGroup><keywordGroup xml:lang="en" type="author"><keyword xml:id="kwd1">big sagebrush</keyword><keyword xml:id="kwd2"><i>Centrocercus urophasianus</i></keyword><keyword xml:id="kwd3">cumulative disturbance factors</keyword><keyword xml:id="kwd4">energy development</keyword><keyword xml:id="kwd5">greater sage‐grouse</keyword><keyword xml:id="kwd6">lek abandonment</keyword><keyword xml:id="kwd7">shrubs</keyword><keyword xml:id="kwd8">wildfire</keyword></keywordGroup><abstractGroup><abstract type="main" xml:lang="en"><title type="main">Abstract</title><p>Detecting the disappearance of active leks is the most efficient way to determine large declines in greater sage‐grouse (<i>Centrocercus urophasianus</i>) populations; thus, understanding factors that influence lek abandonment is critical. We evaluated factors that may have influenced the probability of sage‐grouse lek abandonment in the Bighorn Basin (BHB) of north‐central Wyoming from 1980 to 2009. Our objective was to examine lek abandonment based on landscape characteristics that explain differences between occupied and unoccupied leks. We evaluated lek abandonment from 144 occupied and 39 unoccupied leks from the Wyoming Game and Fish Department lek database with sufficient data for our 30‐year analysis. We conducted our analysis with binary logistic regression using landscape predictor variables obtained from geographic coverages at 5 scales (1.0‐, 3.2‐, 4.0‐, 5.0‐, and 6.4‐km radii around leks) to evaluate how these disturbances have influenced lek abandonment. Coverages included anthropogenic characteristics such as agricultural development, oil and gas development, prescribed burned treatments, and roads; and environmental characteristics such as vegetation attributes and wildfire. Our combined model included the number of oil and gas wells in a 1.0‐km radius, percent area of wildfire in a 1.0‐km radius, and variability in shrub height in a 1.0‐km radius around sage‐grouse leks. Abandoned (unoccupied) leks had 1.1‐times the variability of shrub height in a 1.0‐km radius, 3.1‐times the percentage of wildfire in a 1.0‐km radius, and 10.3‐times the number of oil and gas wells in a 1.0‐km radius compared to occupied leks. The model‐averaged odds of lek persistence with every 1 unit increase in oil and gas wells within a 1.0‐km radius was 0.66 (90% CI: 0.37–0.94), odds with every 1% increase in wildfire in a 1.0‐km radius was 0.99 (90% CI: 0.85–1.12), and odds with every 1 unit increase in the standard deviation of shrub height within a 1.0‐km radius around a lek was 0.77 (90% CI: 0.45–1.08). Because the 90% confidence intervals around the odds ratios of wells did not overlap 1.0, we suggest this predictor variable was most influential in our model‐averaged estimates. The BHB has lower developed reserves of oil and gas than many other regions; however, our study supports findings from other studies that demonstrate energy development increases lek abandonment. Our findings indicate conservation efforts should be focused on minimizing well development and implementing wildfire suppression tactics near active sage‐grouse leks. © 2012 The Wildlife Society.</p></abstract></abstractGroup></contentMeta><noteGroup><note xml:id="fn1"><p>Associate Editor: Christopher K. Williams</p></note></noteGroup></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Disturbance factors influencing greater sage‐grouse lek abandonment in north‐central Wyoming</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>Greater Sage‐Grouse Lek Abandonment</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Disturbance factors influencing greater sage‐grouse lek abandonment in north‐central Wyoming</title></titleInfo><name type="personal"><namePart type="given">Jennifer E.</namePart><namePart type="family">Hess</namePart><affiliation>Department of Ecosystem Science and Management, University of Wyoming, Dept 3354, 1000 East University Avenue, Laramie, WY 82071, USA</affiliation><affiliation>Current Address: Hayden‐Wing Associates, LLC, 2308 South 8th Street, P.O. Box 1689, Laramie, WY 82073, USA.</affiliation><affiliation>Department of Ecosystem Science and Management, University of Wyoming, Dept 3354, 1000 East University Avenue, Laramie, WY 82071, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Jeffrey L.</namePart><namePart type="family">Beck</namePart><affiliation>Department of Ecosystem Science and Management, University of Wyoming, Dept 3354, 1000 East University Avenue, Laramie, WY 82071, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article"></genre><originInfo><publisher>John Wiley & Sons, Inc.</publisher><place><placeTerm type="text">Hoboken, USA</placeTerm></place><dateIssued encoding="w3cdtf">2012-11</dateIssued><dateCaptured encoding="w3cdtf">2010-10-27</dateCaptured><dateValid encoding="w3cdtf">2012-04-30</dateValid><copyrightDate encoding="w3cdtf">2012</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType><extent unit="figures">3</extent><extent unit="tables">4</extent><extent unit="references">75</extent><extent unit="words">9289</extent></physicalDescription><abstract lang="en">Detecting the disappearance of active leks is the most efficient way to determine large declines in greater sage‐grouse (Centrocercus urophasianus) populations; thus, understanding factors that influence lek abandonment is critical. We evaluated factors that may have influenced the probability of sage‐grouse lek abandonment in the Bighorn Basin (BHB) of north‐central Wyoming from 1980 to 2009. Our objective was to examine lek abandonment based on landscape characteristics that explain differences between occupied and unoccupied leks. We evaluated lek abandonment from 144 occupied and 39 unoccupied leks from the Wyoming Game and Fish Department lek database with sufficient data for our 30‐year analysis. We conducted our analysis with binary logistic regression using landscape predictor variables obtained from geographic coverages at 5 scales (1.0‐, 3.2‐, 4.0‐, 5.0‐, and 6.4‐km radii around leks) to evaluate how these disturbances have influenced lek abandonment. Coverages included anthropogenic characteristics such as agricultural development, oil and gas development, prescribed burned treatments, and roads; and environmental characteristics such as vegetation attributes and wildfire. Our combined model included the number of oil and gas wells in a 1.0‐km radius, percent area of wildfire in a 1.0‐km radius, and variability in shrub height in a 1.0‐km radius around sage‐grouse leks. Abandoned (unoccupied) leks had 1.1‐times the variability of shrub height in a 1.0‐km radius, 3.1‐times the percentage of wildfire in a 1.0‐km radius, and 10.3‐times the number of oil and gas wells in a 1.0‐km radius compared to occupied leks. The model‐averaged odds of lek persistence with every 1 unit increase in oil and gas wells within a 1.0‐km radius was 0.66 (90% CI: 0.37–0.94), odds with every 1% increase in wildfire in a 1.0‐km radius was 0.99 (90% CI: 0.85–1.12), and odds with every 1 unit increase in the standard deviation of shrub height within a 1.0‐km radius around a lek was 0.77 (90% CI: 0.45–1.08). Because the 90% confidence intervals around the odds ratios of wells did not overlap 1.0, we suggest this predictor variable was most influential in our model‐averaged estimates. The BHB has lower developed reserves of oil and gas than many other regions; however, our study supports findings from other studies that demonstrate energy development increases lek abandonment. Our findings indicate conservation efforts should be focused on minimizing well development and implementing wildfire suppression tactics near active sage‐grouse leks. © 2012 The Wildlife Society.</abstract><note type="content">*Associate Editor: Christopher K. Williams</note><subject lang="en"><genre>keywords</genre><topic>big sagebrush</topic><topic>Centrocercus urophasianus</topic><topic>cumulative disturbance factors</topic><topic>energy development</topic><topic>greater sage‐grouse</topic><topic>lek abandonment</topic><topic>shrubs</topic><topic>wildfire</topic></subject><relatedItem type="host"><titleInfo><title>The Journal of Wildlife Management</title></titleInfo><titleInfo type="abbreviated"><title>The Journal of Wildlife Management</title></titleInfo><genre type="journal">journal</genre><subject><genre>article-category</genre><topic>Management and Conservation</topic></subject><identifier type="ISSN">0022-541X</identifier><identifier type="eISSN">1937-2817</identifier><identifier type="DOI">10.1002/(ISSN)1937-2817</identifier><identifier type="PublisherID">JWMG</identifier><part><date>2012</date><detail type="volume"><caption>vol.</caption><number>76</number></detail><detail type="issue"><caption>no.</caption><number>8</number></detail><extent unit="pages"><start>1625</start><end>1634</end><total>10</total></extent></part></relatedItem><identifier type="istex">40A1C599F81AD99879B16BD7EA785DC792214019</identifier><identifier type="DOI">10.1002/jwmg.417</identifier><identifier type="ArticleID">JWMG417</identifier><accessCondition type="use and reproduction" contentType="copyright">Copyright © The Wildlife Society, 2012</accessCondition><recordInfo><recordContentSource>WILEY</recordContentSource><recordOrigin>John Wiley & Sons, Inc.</recordOrigin></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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