Microhabitat and Landscape Characteristics Associated with the Threatened Allegheny Woodrat
Identifieur interne : 000F82 ( Istex/Corpus ); précédent : 000F81; suivant : 000F83Microhabitat and Landscape Characteristics Associated with the Threatened Allegheny Woodrat
Auteurs : Betsie J. Balcom ; Richard H. YahnerSource :
- Conservation Biology [ 0888-8892 ] ; 1996-04.
Abstract
Populations of Allegheny woodrat (Neotoma magister) in the northeastern U.S. have declined recently for unexplained reasons. The species is believed to be separate from the more widely distributed eastern woodrat (Neotoma floridana; Ord 1818) and is listed as threatened in Pennsylvania. Several hypotheses have been proposed for the decline in N. magister, but little information on the ecology of the species is available to direct conservation efforts. Using a multi‐scale approach, we compared recent microhabitat and landscape characteristics among historical, occupied, and reference sites to pre‐1960 versus post‐1985 landscape characteristics associated with historical woodrat sites. Our analysis suggests that habitat characteristics, such as percent rock cover and aspect, have affected the current distribution of woodrats in Pennsylvania. Differences in microhabitat probably do not account for the disappearance of woodrats from historical sites. We found no evidence that low levels of human activity near nest sites or that forest fragmentation were directly responsible for the observed decline. But we observed increases in residential and agricultural cover near historical sites between the 1950s and 1980s and higher percentages of croplands and other agricultural cover at historical sites than at occupied sites. These land uses are capable of supporting high populations of Great Horned Owls (Bubo virginianus) and raccoons (Procyon lotor). Increased predation by Great Horned Owls and exposure to the raccoon roundworm (Baylisascaris procyonis) have been suggested as potential factors contributing to the decline of woodrat populations in the northeastern United States. Historical sites bad significantly higher percentages of coniferous and mixed forest cover than occupied sites, and the percentage of coniferous forest cover at historical sites increased significantly between the 1950s and 1980s. Therefore, we speculate that changes in forest composition in Pennsylvania may have adversely affected habitat quality (particularly food availability) for Allegheny woodrats and contributed to their extirpation from historical sites.
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DOI: 10.1046/j.1523-1739.1996.10020515.x
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The species is believed to be separate from the more widely distributed eastern woodrat (Neotoma floridana; Ord 1818) and is listed as threatened in Pennsylvania. Several hypotheses have been proposed for the decline in N. magister, but little information on the ecology of the species is available to direct conservation efforts. Using a multi‐scale approach, we compared recent microhabitat and landscape characteristics among historical, occupied, and reference sites to pre‐1960 versus post‐1985 landscape characteristics associated with historical woodrat sites. Our analysis suggests that habitat characteristics, such as percent rock cover and aspect, have affected the current distribution of woodrats in Pennsylvania. Differences in microhabitat probably do not account for the disappearance of woodrats from historical sites. We found no evidence that low levels of human activity near nest sites or that forest fragmentation were directly responsible for the observed decline. But we observed increases in residential and agricultural cover near historical sites between the 1950s and 1980s and higher percentages of croplands and other agricultural cover at historical sites than at occupied sites. These land uses are capable of supporting high populations of Great Horned Owls (Bubo virginianus) and raccoons (Procyon lotor). Increased predation by Great Horned Owls and exposure to the raccoon roundworm (Baylisascaris procyonis) have been suggested as potential factors contributing to the decline of woodrat populations in the northeastern United States. Historical sites bad significantly higher percentages of coniferous and mixed forest cover than occupied sites, and the percentage of coniferous forest cover at historical sites increased significantly between the 1950s and 1980s. Therefore, we speculate that changes in forest composition in Pennsylvania may have adversely affected habitat quality (particularly food availability) for Allegheny woodrats and contributed to their extirpation from historical sites.</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>Betsie J. Balcom</name><affiliations><json:string>Intercollege Graduate Degree Program in Ecology and School of Forest Resources, The Pennsylvania State University, University Park, PA 16802‐4300, U.S.A., email rhy@psum.psu.edu</json:string></affiliations></json:item><json:item><name>Richard H. Yahner</name><affiliations><json:string>Address correspondence to R. H. 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Our analysis suggests that habitat characteristics, such as percent rock cover and aspect, have affected the current distribution of woodrats in Pennsylvania. Differences in microhabitat probably do not account for the disappearance of woodrats from historical sites. We found no evidence that low levels of human activity near nest sites or that forest fragmentation were directly responsible for the observed decline. But we observed increases in residential and agricultural cover near historical sites between the 1950s and 1980s and higher percentages of croplands and other agricultural cover at historical sites than at occupied sites. These land uses are capable of supporting high populations of Great Horned Owls (Bubo virginianus) and raccoons (Procyon lotor). Increased predation by Great Horned Owls and exposure to the raccoon roundworm (Baylisascaris procyonis) have been suggested as potential factors contributing to the decline of woodrat populations in the northeastern United States. Historical sites bad significantly higher percentages of coniferous and mixed forest cover than occupied sites, and the percentage of coniferous forest cover at historical sites increased significantly between the 1950s and 1980s. 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H. Yahner.</affiliation></author></analytic><monogr><title level="j">Conservation Biology</title><idno type="pISSN">0888-8892</idno><idno type="eISSN">1523-1739</idno><idno type="DOI">10.1111/(ISSN)1523-1739</idno><imprint><publisher>Blackwell Science, Inc.</publisher><pubPlace>238 Main Street, Cambridge, Massachusetts 02142</pubPlace><date type="published" when="1996-04"></date><biblScope unit="volume">10</biblScope><biblScope unit="issue">2</biblScope><biblScope unit="page" from="515">515</biblScope><biblScope unit="page" to="525">525</biblScope></imprint></monogr><idno type="istex">CA6689012774CD708655B3A6E1033FCD3CD51FE6</idno><idno type="DOI">10.1046/j.1523-1739.1996.10020515.x</idno><idno type="ArticleID">COBI10020515</idno></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>1996</date></creation><langUsage><language ident="en">en</language></langUsage><abstract xml:lang="en"><p>Populations of Allegheny woodrat (Neotoma magister) in the northeastern U.S. have declined recently for unexplained reasons. The species is believed to be separate from the more widely distributed eastern woodrat (Neotoma floridana; Ord 1818) and is listed as threatened in Pennsylvania. Several hypotheses have been proposed for the decline in N. magister, but little information on the ecology of the species is available to direct conservation efforts. Using a multi‐scale approach, we compared recent microhabitat and landscape characteristics among historical, occupied, and reference sites to pre‐1960 versus post‐1985 landscape characteristics associated with historical woodrat sites. Our analysis suggests that habitat characteristics, such as percent rock cover and aspect, have affected the current distribution of woodrats in Pennsylvania. Differences in microhabitat probably do not account for the disappearance of woodrats from historical sites. We found no evidence that low levels of human activity near nest sites or that forest fragmentation were directly responsible for the observed decline. But we observed increases in residential and agricultural cover near historical sites between the 1950s and 1980s and higher percentages of croplands and other agricultural cover at historical sites than at occupied sites. These land uses are capable of supporting high populations of Great Horned Owls (Bubo virginianus) and raccoons (Procyon lotor). Increased predation by Great Horned Owls and exposure to the raccoon roundworm (Baylisascaris procyonis) have been suggested as potential factors contributing to the decline of woodrat populations in the northeastern United States. Historical sites bad significantly higher percentages of coniferous and mixed forest cover than occupied sites, and the percentage of coniferous forest cover at historical sites increased significantly between the 1950s and 1980s. Therefore, we speculate that changes in forest composition in Pennsylvania may have adversely affected habitat quality (particularly food availability) for Allegheny woodrats and contributed to their extirpation from historical sites.</p></abstract><abstract xml:lang="es"><p>Las poblaciones de la rata del bosque, Neotoma magister, en el noreste de los Estados Unidos, han declinado recientemente por razones desconocidas. Se cree que esta especie es diferente de la rata del bosque del este (Neotoma floridana; Ord 1818), que posee una distribución más amplia, encontrandose listada como una especie amenazada en Pennsylvania. Se han propuesto varias hipótesis para explicar la declinación de N. magister, pero muy poca información con respecto a la ecología de la especie está disponsible para dirigir los esfuerzos de conservación. Utilizando un enfoque a nivel de escalas múltiples, comparamos (1) las características recientes del microhabitat y el paisaje entre sitios históricos, sitios ocupados y sitios de referencia y (2) las características del paisaje asociadas con sitios históricos de la rata del bosque anteriores a 1960 contra aquellas posteriores a 1985. Nuestro análisis sugiere que las características del hábitat, tales como la cobertura rocosa y el aspecto, han afectado la distribución actual de N. magister en Pennsylvania. Las diferencias en el microhábitat probablemente no son responsables de la desaparición de la rata del bosque de sus sitios históricos. No encontramos evidencia que indiquen que los bajos niveles de actividad humana cerca de los sitios de los nidos o la fragmentación del bosque hayan sido directamente responsables de la declinación observada. Sin embargo, observamos incrementos en la cobertura residencial y agrícola cerca de los sitios históricos entre las décadas de 1950 y 1980 y porcentajes de cultivos y otras coberturas agrícolas más altos en los sitios históricos que en los ocupados. Estos usos de la tierra son capaces de albergar un gran número de poblaciones de búhos (Bubo virginianus) y mapaches (Procyon lotor). El incremento de la de predación por parte de B. Virginianus y la exposición a Baylisascaris procyonis, un parásito del mapache, han sido propuestos como factores potenciales que han contribuído a la declinación de las poblaciones de las ratas del bosques en el noreste de EEUU. Los sitios históricos tuvieron porcentajes significativamante más altos de cobertura de coníferas y bosque mixto que los sitios ocupados. El porcentaje de la cobertura del bosque de coníferas en los sitios históricos se incrementó significativamente entre las decadas de 1950 y 1980. Por consiguiente, especulamos que los cambios en la composición del bosque en Pennsylvania pueden haber afectado adversamente la calidad del hábitat (es decir, la disponibilidad de alimento) de N. magister y haber contribuído a su extirpación de los sitios históricos.</p></abstract></profileDesc><revisionDesc><change when="1996-04">Published</change><change xml:id="refBibs-istex" who="#ISTEX-API" when="2016-12-14">References added</change><change xml:id="refBibs-istex" who="#ISTEX-API" when="2017-02-9">References added</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/CA6689012774CD708655B3A6E1033FCD3CD51FE6/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Wiley component found"><istex:xmlDeclaration>version="1.0" encoding="UTF-8" standalone="yes"</istex:xmlDeclaration><istex:document><component version="2.0" type="serialArticle" xml:lang="en"><header><publicationMeta level="product"><publisherInfo><publisherName>Blackwell Science, Inc.</publisherName><publisherLoc>238 Main Street, Cambridge, Massachusetts 02142</publisherLoc></publisherInfo><doi origin="wiley" registered="yes">10.1111/(ISSN)1523-1739</doi><issn type="print">0888-8892</issn><issn type="electronic">1523-1739</issn><idGroup><id type="product" value="COBI"></id><id type="publisherDivision" value="ST"></id></idGroup><titleGroup><title type="main" sort="CONSERVATION BIOLOGY">Conservation Biology</title></titleGroup></publicationMeta><publicationMeta level="part" position="04002"><doi origin="wiley">10.1111/cbi.1996.10.issue-2</doi><numberingGroup><numbering type="journalVolume" number="10">10</numbering><numbering type="journalIssue" number="2">2</numbering></numberingGroup><coverDate startDate="1996-04">April 1996</coverDate></publicationMeta><publicationMeta level="unit" type="article" position="0051500" status="forIssue"><doi origin="wiley">10.1046/j.1523-1739.1996.10020515.x</doi><idGroup><id type="unit" value="COBI10020515"></id></idGroup><titleGroup><title type="tocHeading1">Original Article</title></titleGroup><eventGroup><event type="firstOnline" date="2002-02-27"></event><event type="publishedOnlineFinalForm" date="2002-02-27"></event><event type="xmlConverted" agent="Converter:BPG_TO_WML3G version:2.3.6 mode:FullText source:Header result:Header" date="2010-04-20"></event><event type="xmlConverted" agent="Converter:WILEY_ML3G_TO_WILEY_ML3GV2 version:3.8.8" date="2014-01-15"></event><event type="xmlConverted" agent="Converter:WML3G_To_WML3G version:4.1.7 mode:FullText,remove_FC" date="2014-10-16"></event></eventGroup><numberingGroup><numbering type="pageFirst" number="515">515</numbering><numbering type="pageLast" number="525">525</numbering></numberingGroup><correspondenceTo>Address correspondence to R. H. Yahner.</correspondenceTo><linkGroup><link type="toTypesetVersion" href="file:COBI.COBI10020515.pdf"></link></linkGroup></publicationMeta><contentMeta><unparsedEditorialHistory>Paper submitted March 6, 1995; revised manuscript accepted June 16, 1995.</unparsedEditorialHistory><countGroup><count type="linksPubMed" number="0"></count><count type="linksCrossRef" number="0"></count></countGroup><titleGroup><title type="main">Microhabitat and Landscape Characteristics Associated with the Threatened Allegheny Woodrat</title><title type="shortAuthors">Balcom & Yahner</title><title type="short">Allegheny Woodrat Conservation</title><title type="main" xml:lang="es"><!--xml:lang="es" added by WileyML 3Gv2 convertor-->Las características del micro hábitat y del paisaje asociadas con las poblaciones amenazada de <i>Neotoma magister</i></title></titleGroup><creators><creator creatorRole="author" xml:id="cr1" affiliationRef="#aff-1-1"><personName><givenNames>Betsie J.</givenNames><familyName>Balcom</familyName></personName></creator><creator creatorRole="author" xml:id="cr2" corresponding="yes"><personName><givenNames>Richard H.</givenNames><familyName>Yahner</familyName></personName></creator></creators><affiliationGroup><affiliation xml:id="aff-1-1" countryCode="US"><unparsedAffiliation> Intercollege Graduate Degree Program in Ecology and School of Forest Resources, The Pennsylvania State University, University Park, PA 16802‐4300, U.S.A., email <email>rhy@psum.psu.edu</email></unparsedAffiliation></affiliation></affiliationGroup><abstractGroup><abstract type="main" xml:lang="en"><p>Populations of Allegheny woodrat (<i>Neotoma magister</i>) in the northeastern U.S. have declined recently for unexplained reasons. The species is believed to be separate from the more widely distributed eastern woodrat (<i>Neotoma floridana;</i> Ord 1818) and is listed as threatened in Pennsylvania. Several hypotheses have been proposed for the decline in <i>N. magister</i>, but little information on the ecology of the species is available to direct conservation efforts. Using a multi‐scale approach, we compared recent microhabitat and landscape characteristics among historical, occupied, and reference sites to pre‐1960 versus post‐1985 landscape characteristics associated with historical woodrat sites. Our analysis suggests that habitat characteristics, such as percent rock cover and aspect, have affected the current distribution of woodrats in Pennsylvania. Differences in microhabitat probably do not account for the disappearance of woodrats from historical sites. We found no evidence that low levels of human activity near nest sites or that forest fragmentation were directly responsible for the observed decline. But we observed increases in residential and agricultural cover near historical sites between the 1950s and 1980s and higher percentages of croplands and other agricultural cover at historical sites than at occupied sites. These land uses are capable of supporting high populations of Great Horned Owls (<i>Bubo virginianus</i>) and raccoons (<i>Procyon lotor</i>). Increased predation by Great Horned Owls and exposure to the raccoon roundworm (<i>Baylisascaris procyonis</i>) have been suggested as potential factors contributing to the decline of woodrat populations in the northeastern United States. Historical sites bad significantly higher percentages of coniferous and mixed forest cover than occupied sites, and the percentage of coniferous forest cover at historical sites increased significantly between the 1950s and 1980s. Therefore, we speculate that changes in forest composition in Pennsylvania may have adversely affected habitat quality (particularly food availability) for Allegheny woodrats and contributed to their extirpation from historical sites.</p></abstract><abstract type="main" xml:lang="es"><p>Las poblaciones de la rata del bosque, <i>Neotoma magister</i>, en el noreste de los Estados Unidos, han declinado recientemente por razones desconocidas. Se cree que esta especie es diferente de la rata del bosque del este (<i>Neotoma floridana;</i> Ord 1818), que posee una distribución más amplia, encontrandose listada como una especie amenazada en Pennsylvania. Se han propuesto varias hipótesis para explicar la declinación de <i>N. magister</i>, pero muy poca información con respecto a la ecología de la especie está disponsible para dirigir los esfuerzos de conservación. Utilizando un enfoque a nivel de escalas múltiples, comparamos (1) las características recientes del microhabitat y el paisaje entre sitios históricos, sitios ocupados y sitios de referencia y (2) las características del paisaje asociadas con sitios históricos de la rata del bosque anteriores a 1960 contra aquellas posteriores a 1985. Nuestro análisis sugiere que las características del hábitat, tales como la cobertura rocosa y el aspecto, han afectado la distribución actual de <i>N. magister</i> en Pennsylvania. Las diferencias en el microhábitat probablemente no son responsables de la desaparición de la rata del bosque de sus sitios históricos. No encontramos evidencia que indiquen que los bajos niveles de actividad humana cerca de los sitios de los nidos o la fragmentación del bosque hayan sido directamente responsables de la declinación observada. Sin embargo, observamos incrementos en la cobertura residencial y agrícola cerca de los sitios históricos entre las décadas de 1950 y 1980 y porcentajes de cultivos y otras coberturas agrícolas más altos en los sitios históricos que en los ocupados. Estos usos de la tierra son capaces de albergar un gran número de poblaciones de búhos (<i>Bubo virginianus</i>) y mapaches (<i>Procyon lotor</i>). El incremento de la de predación por parte de <i>B. Virginianus</i> y la exposición a <i>Baylisascaris procyonis</i>, un parásito del mapache, han sido propuestos como factores potenciales que han contribuído a la declinación de las poblaciones de las ratas del bosques en el noreste de EEUU. Los sitios históricos tuvieron porcentajes significativamante más altos de cobertura de coníferas y bosque mixto que los sitios ocupados. El porcentaje de la cobertura del bosque de coníferas en los sitios históricos se incrementó significativamente entre las decadas de 1950 y 1980. Por consiguiente, especulamos que los cambios en la composición del bosque en Pennsylvania pueden haber afectado adversamente la calidad del hábitat (es decir, la disponibilidad de alimento) de <i>N. magister</i> y haber contribuído a su extirpación de los sitios históricos.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Microhabitat and Landscape Characteristics Associated with the Threatened Allegheny Woodrat</title></titleInfo><titleInfo lang="es"><title>Las características del micro hábitat y del paisaje asociadas con las poblaciones amenazada de Neotoma magister</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>Allegheny Woodrat Conservation</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Microhabitat and Landscape Characteristics Associated with the Threatened Allegheny Woodrat</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="es"><title>Las características del micro hábitat y del paisaje asociadas con las poblaciones amenazada de Neotoma magister</title></titleInfo><name type="personal"><namePart type="given">Betsie J.</namePart><namePart type="family">Balcom</namePart><affiliation>Intercollege Graduate Degree Program in Ecology and School of Forest Resources, The Pennsylvania State University, University Park, PA 16802‐4300, U.S.A., email rhy@psum.psu.edu</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Richard H.</namePart><namePart type="family">Yahner</namePart><affiliation>Address correspondence to R. H. Yahner.</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article"></genre><originInfo><publisher>Blackwell Science, Inc.</publisher><place><placeTerm type="text">238 Main Street, Cambridge, Massachusetts 02142</placeTerm></place><dateIssued encoding="w3cdtf">1996-04</dateIssued><edition>Paper submitted March 6, 1995; revised manuscript accepted June 16, 1995.</edition><copyrightDate encoding="w3cdtf">1996</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType></physicalDescription><abstract lang="en">Populations of Allegheny woodrat (Neotoma magister) in the northeastern U.S. have declined recently for unexplained reasons. The species is believed to be separate from the more widely distributed eastern woodrat (Neotoma floridana; Ord 1818) and is listed as threatened in Pennsylvania. Several hypotheses have been proposed for the decline in N. magister, but little information on the ecology of the species is available to direct conservation efforts. Using a multi‐scale approach, we compared recent microhabitat and landscape characteristics among historical, occupied, and reference sites to pre‐1960 versus post‐1985 landscape characteristics associated with historical woodrat sites. Our analysis suggests that habitat characteristics, such as percent rock cover and aspect, have affected the current distribution of woodrats in Pennsylvania. Differences in microhabitat probably do not account for the disappearance of woodrats from historical sites. We found no evidence that low levels of human activity near nest sites or that forest fragmentation were directly responsible for the observed decline. But we observed increases in residential and agricultural cover near historical sites between the 1950s and 1980s and higher percentages of croplands and other agricultural cover at historical sites than at occupied sites. These land uses are capable of supporting high populations of Great Horned Owls (Bubo virginianus) and raccoons (Procyon lotor). Increased predation by Great Horned Owls and exposure to the raccoon roundworm (Baylisascaris procyonis) have been suggested as potential factors contributing to the decline of woodrat populations in the northeastern United States. Historical sites bad significantly higher percentages of coniferous and mixed forest cover than occupied sites, and the percentage of coniferous forest cover at historical sites increased significantly between the 1950s and 1980s. Therefore, we speculate that changes in forest composition in Pennsylvania may have adversely affected habitat quality (particularly food availability) for Allegheny woodrats and contributed to their extirpation from historical sites.</abstract><abstract lang="es">Las poblaciones de la rata del bosque, Neotoma magister, en el noreste de los Estados Unidos, han declinado recientemente por razones desconocidas. Se cree que esta especie es diferente de la rata del bosque del este (Neotoma floridana; Ord 1818), que posee una distribución más amplia, encontrandose listada como una especie amenazada en Pennsylvania. Se han propuesto varias hipótesis para explicar la declinación de N. magister, pero muy poca información con respecto a la ecología de la especie está disponsible para dirigir los esfuerzos de conservación. Utilizando un enfoque a nivel de escalas múltiples, comparamos (1) las características recientes del microhabitat y el paisaje entre sitios históricos, sitios ocupados y sitios de referencia y (2) las características del paisaje asociadas con sitios históricos de la rata del bosque anteriores a 1960 contra aquellas posteriores a 1985. Nuestro análisis sugiere que las características del hábitat, tales como la cobertura rocosa y el aspecto, han afectado la distribución actual de N. magister en Pennsylvania. Las diferencias en el microhábitat probablemente no son responsables de la desaparición de la rata del bosque de sus sitios históricos. No encontramos evidencia que indiquen que los bajos niveles de actividad humana cerca de los sitios de los nidos o la fragmentación del bosque hayan sido directamente responsables de la declinación observada. Sin embargo, observamos incrementos en la cobertura residencial y agrícola cerca de los sitios históricos entre las décadas de 1950 y 1980 y porcentajes de cultivos y otras coberturas agrícolas más altos en los sitios históricos que en los ocupados. Estos usos de la tierra son capaces de albergar un gran número de poblaciones de búhos (Bubo virginianus) y mapaches (Procyon lotor). El incremento de la de predación por parte de B. Virginianus y la exposición a Baylisascaris procyonis, un parásito del mapache, han sido propuestos como factores potenciales que han contribuído a la declinación de las poblaciones de las ratas del bosques en el noreste de EEUU. Los sitios históricos tuvieron porcentajes significativamante más altos de cobertura de coníferas y bosque mixto que los sitios ocupados. El porcentaje de la cobertura del bosque de coníferas en los sitios históricos se incrementó significativamente entre las decadas de 1950 y 1980. Por consiguiente, especulamos que los cambios en la composición del bosque en Pennsylvania pueden haber afectado adversamente la calidad del hábitat (es decir, la disponibilidad de alimento) de N. magister y haber contribuído a su extirpación de los sitios históricos.</abstract><relatedItem type="host"><titleInfo><title>Conservation Biology</title></titleInfo><genre type="journal">journal</genre><identifier type="ISSN">0888-8892</identifier><identifier type="eISSN">1523-1739</identifier><identifier type="DOI">10.1111/(ISSN)1523-1739</identifier><identifier type="PublisherID">COBI</identifier><part><date>1996</date><detail type="volume"><caption>vol.</caption><number>10</number></detail><detail type="issue"><caption>no.</caption><number>2</number></detail><extent unit="pages"><start>515</start><end>525</end></extent></part></relatedItem><identifier type="istex">CA6689012774CD708655B3A6E1033FCD3CD51FE6</identifier><identifier type="DOI">10.1046/j.1523-1739.1996.10020515.x</identifier><identifier type="ArticleID">COBI10020515</identifier><recordInfo><recordContentSource>WILEY</recordContentSource><recordOrigin>Blackwell Science, Inc.</recordOrigin></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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