Territory selection by the Dartford warbler ( Sylvia undata ) in Dorset, England: the role of vegetation type, habitat fragmentation and population size
Identifieur interne : 000730 ( Istex/Corpus ); précédent : 000729; suivant : 000731Territory selection by the Dartford warbler ( Sylvia undata ) in Dorset, England: the role of vegetation type, habitat fragmentation and population size
Auteurs : Leon J. L. Van Den Berg ; James. M. Bullock ; Ralph T. Clarke ; Rowena H. W. Langston ; Rob J. RoseSource :
- Biological Conservation [ 0006-3207 ] ; 2001.
English descriptors
Abstract
The Dartford warbler (Sylvia undata) is of conservation concern throughout western Europe. In the UK conservation is centred on management of the warbler's lowland heath habitat. This study analysed the warbler's habitat requirements in Dorset, its UK population centre. Maps of breeding territories from 1974, 1984 and 1994 were linked to maps of heathland vegetation and adjacent land use from 1978, 1987 and 1996. Logistic regression showed territories were positively associated with the area of dry/humid heath, mature Ulex europaeus, bare soil, and more rarely with wet heath, young U. europaeus, U. gallii and Pinus scrub. There were negative responses to fragmentation (isolation and area of a heath), and the proximity of woodland, urban areas and intensive agriculture. Sub-optimal habitat was used in years of high population size. Habitat management for this species should consider not only heathland vegetation but also landscape factors such as fragmentation and the proximity of avoided land use types.
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DOI: 10.1016/S0006-3207(01)00069-6
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ISTEX:1205E104D90543569CA1ABC6B16802FD341203F3Le document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="en">Territory selection by the Dartford warbler ( Sylvia undata ) in Dorset, England: the role of vegetation type, habitat fragmentation and population size</title><author><name sortKey="Van Den Berg, Leon J L" sort="Van Den Berg, Leon J L" uniqKey="Van Den Berg L" first="Leon J. L." last="Van Den Berg">Leon J. L. Van Den Berg</name><affiliation><mods:affiliation>NERC Centre for Ecology and Hydrology, CEH Dorset, Winfrith Technology Centre, Dorchester, Dorset DT2 8ZD, UK</mods:affiliation></affiliation></author><author><name sortKey="Bullock, James M" sort="Bullock, James M" uniqKey="Bullock J" first="James. M." last="Bullock">James. M. Bullock</name><affiliation><mods:affiliation>E-mail: jmbul@ceh.ac.uk</mods:affiliation></affiliation><affiliation><mods:affiliation>NERC Centre for Ecology and Hydrology, CEH Dorset, Winfrith Technology Centre, Dorchester, Dorset DT2 8ZD, UK</mods:affiliation></affiliation></author><author><name sortKey="Clarke, Ralph T" sort="Clarke, Ralph T" uniqKey="Clarke R" first="Ralph T." last="Clarke">Ralph T. Clarke</name><affiliation><mods:affiliation>NERC Centre for Ecology and Hydrology, CEH Dorset, Winfrith Technology Centre, Dorchester, Dorset DT2 8ZD, UK</mods:affiliation></affiliation></author><author><name sortKey="Langston, Rowena H W" sort="Langston, Rowena H W" uniqKey="Langston R" first="Rowena H. W." last="Langston">Rowena H. W. Langston</name><affiliation><mods:affiliation>RSPB, The Lodge, Sandy, Beds SG19 2DL, UK</mods:affiliation></affiliation></author><author><name sortKey="Rose, Rob J" sort="Rose, Rob J" uniqKey="Rose R" first="Rob J." last="Rose">Rob J. Rose</name><affiliation><mods:affiliation>NERC Centre for Ecology and Hydrology, CEH Dorset, Winfrith Technology Centre, Dorchester, Dorset DT2 8ZD, UK</mods:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:1205E104D90543569CA1ABC6B16802FD341203F3</idno><date when="2001" year="2001">2001</date><idno type="doi">10.1016/S0006-3207(01)00069-6</idno><idno type="url">https://api.istex.fr/document/1205E104D90543569CA1ABC6B16802FD341203F3/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">000730</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">000730</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Territory selection by the Dartford warbler ( Sylvia undata ) in Dorset, England: the role of vegetation type, habitat fragmentation and population size</title><author><name sortKey="Van Den Berg, Leon J L" sort="Van Den Berg, Leon J L" uniqKey="Van Den Berg L" first="Leon J. L." last="Van Den Berg">Leon J. L. Van Den Berg</name><affiliation><mods:affiliation>NERC Centre for Ecology and Hydrology, CEH Dorset, Winfrith Technology Centre, Dorchester, Dorset DT2 8ZD, UK</mods:affiliation></affiliation></author><author><name sortKey="Bullock, James M" sort="Bullock, James M" uniqKey="Bullock J" first="James. M." last="Bullock">James. M. Bullock</name><affiliation><mods:affiliation>E-mail: jmbul@ceh.ac.uk</mods:affiliation></affiliation><affiliation><mods:affiliation>NERC Centre for Ecology and Hydrology, CEH Dorset, Winfrith Technology Centre, Dorchester, Dorset DT2 8ZD, UK</mods:affiliation></affiliation></author><author><name sortKey="Clarke, Ralph T" sort="Clarke, Ralph T" uniqKey="Clarke R" first="Ralph T." last="Clarke">Ralph T. Clarke</name><affiliation><mods:affiliation>NERC Centre for Ecology and Hydrology, CEH Dorset, Winfrith Technology Centre, Dorchester, Dorset DT2 8ZD, UK</mods:affiliation></affiliation></author><author><name sortKey="Langston, Rowena H W" sort="Langston, Rowena H W" uniqKey="Langston R" first="Rowena H. W." last="Langston">Rowena H. W. Langston</name><affiliation><mods:affiliation>RSPB, The Lodge, Sandy, Beds SG19 2DL, UK</mods:affiliation></affiliation></author><author><name sortKey="Rose, Rob J" sort="Rose, Rob J" uniqKey="Rose R" first="Rob J." last="Rose">Rob J. Rose</name><affiliation><mods:affiliation>NERC Centre for Ecology and Hydrology, CEH Dorset, Winfrith Technology Centre, Dorchester, Dorset DT2 8ZD, UK</mods:affiliation></affiliation></author></analytic><monogr></monogr><series><title level="j">Biological Conservation</title><title level="j" type="abbrev">BIOC</title><idno type="ISSN">0006-3207</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="2001">2001</date><biblScope unit="volume">101</biblScope><biblScope unit="issue">2</biblScope><biblScope unit="page" from="217">217</biblScope><biblScope unit="page" to="228">228</biblScope></imprint><idno type="ISSN">0006-3207</idno></series><idno type="istex">1205E104D90543569CA1ABC6B16802FD341203F3</idno><idno type="DOI">10.1016/S0006-3207(01)00069-6</idno><idno type="PII">S0006-3207(01)00069-6</idno><idno type="ArticleID">1549</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0006-3207</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Conservation management</term><term>Habitat selection</term><term>Heathland</term><term>Ulex europaeus</term><term>Urbanisation</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The Dartford warbler (Sylvia undata) is of conservation concern throughout western Europe. In the UK conservation is centred on management of the warbler's lowland heath habitat. This study analysed the warbler's habitat requirements in Dorset, its UK population centre. Maps of breeding territories from 1974, 1984 and 1994 were linked to maps of heathland vegetation and adjacent land use from 1978, 1987 and 1996. Logistic regression showed territories were positively associated with the area of dry/humid heath, mature Ulex europaeus, bare soil, and more rarely with wet heath, young U. europaeus, U. gallii and Pinus scrub. There were negative responses to fragmentation (isolation and area of a heath), and the proximity of woodland, urban areas and intensive agriculture. Sub-optimal habitat was used in years of high population size. Habitat management for this species should consider not only heathland vegetation but also landscape factors such as fragmentation and the proximity of avoided land use types.</div></front></TEI><istex><corpusName>elsevier</corpusName><author><json:item><name>Leon J.L. van den Berg</name><affiliations><json:string>NERC Centre for Ecology and Hydrology, CEH Dorset, Winfrith Technology Centre, Dorchester, Dorset DT2 8ZD, UK</json:string></affiliations></json:item><json:item><name>James.M. Bullock</name><affiliations><json:string>E-mail: jmbul@ceh.ac.uk</json:string><json:string>NERC Centre for Ecology and Hydrology, CEH Dorset, Winfrith Technology Centre, Dorchester, Dorset DT2 8ZD, UK</json:string></affiliations></json:item><json:item><name>Ralph T. Clarke</name><affiliations><json:string>NERC Centre for Ecology and Hydrology, CEH Dorset, Winfrith Technology Centre, Dorchester, Dorset DT2 8ZD, UK</json:string></affiliations></json:item><json:item><name>Rowena H.W. Langston</name><affiliations><json:string>RSPB, The Lodge, Sandy, Beds SG19 2DL, UK</json:string></affiliations></json:item><json:item><name>Rob J. Rose</name><affiliations><json:string>NERC Centre for Ecology and Hydrology, CEH Dorset, Winfrith Technology Centre, Dorchester, Dorset DT2 8ZD, UK</json:string></affiliations></json:item></author><subject><json:item><lang><json:string>eng</json:string></lang><value>Conservation management</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Habitat selection</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Heathland</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Ulex europaeus</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Urbanisation</value></json:item></subject><articleId><json:string>1549</json:string></articleId><language><json:string>eng</json:string></language><originalGenre><json:string>Full-length article</json:string></originalGenre><abstract>The Dartford warbler (Sylvia undata) is of conservation concern throughout western Europe. In the UK conservation is centred on management of the warbler's lowland heath habitat. This study analysed the warbler's habitat requirements in Dorset, its UK population centre. Maps of breeding territories from 1974, 1984 and 1994 were linked to maps of heathland vegetation and adjacent land use from 1978, 1987 and 1996. Logistic regression showed territories were positively associated with the area of dry/humid heath, mature Ulex europaeus, bare soil, and more rarely with wet heath, young U. europaeus, U. gallii and Pinus scrub. There were negative responses to fragmentation (isolation and area of a heath), and the proximity of woodland, urban areas and intensive agriculture. Sub-optimal habitat was used in years of high population size. Habitat management for this species should consider not only heathland vegetation but also landscape factors such as fragmentation and the proximity of avoided land use types.</abstract><qualityIndicators><score>6.848</score><pdfVersion>1.2</pdfVersion><pdfPageSize>595 x 794 pts</pdfPageSize><refBibsNative>true</refBibsNative><keywordCount>5</keywordCount><abstractCharCount>1018</abstractCharCount><pdfWordCount>7371</pdfWordCount><pdfCharCount>46046</pdfCharCount><pdfPageCount>12</pdfPageCount><abstractWordCount>154</abstractWordCount></qualityIndicators><title>Territory selection by the Dartford warbler ( Sylvia undata ) in Dorset, England: the role of vegetation type, habitat fragmentation and population size</title><pii><json:string>S0006-3207(01)00069-6</json:string></pii><genre><json:string>research-article</json:string></genre><host><volume>101</volume><pii><json:string>S0006-3207(00)X0083-3</json:string></pii><pages><last>228</last><first>217</first></pages><issn><json:string>0006-3207</json:string></issn><issue>2</issue><genre><json:string>journal</json:string></genre><language><json:string>unknown</json:string></language><title>Biological Conservation</title><publicationDate>2001</publicationDate></host><publicationDate>2001</publicationDate><copyrightDate>2001</copyrightDate><doi><json:string>10.1016/S0006-3207(01)00069-6</json:string></doi><id>1205E104D90543569CA1ABC6B16802FD341203F3</id><score>0.040499393</score><fulltext><json:item><extension>pdf</extension><original>true</original><mimetype>application/pdf</mimetype><uri>https://api.istex.fr/document/1205E104D90543569CA1ABC6B16802FD341203F3/fulltext/pdf</uri></json:item><json:item><extension>zip</extension><original>false</original><mimetype>application/zip</mimetype><uri>https://api.istex.fr/document/1205E104D90543569CA1ABC6B16802FD341203F3/fulltext/zip</uri></json:item><istex:fulltextTEI uri="https://api.istex.fr/document/1205E104D90543569CA1ABC6B16802FD341203F3/fulltext/tei"><teiHeader><fileDesc><titleStmt><title level="a" type="main" xml:lang="en">Territory selection by the Dartford warbler ( Sylvia undata ) in Dorset, England: the role of vegetation type, habitat fragmentation and population size</title></titleStmt><publicationStmt><authority>ISTEX</authority><publisher>ELSEVIER</publisher><availability><p>©2001 Elsevier Science Ltd</p></availability><date>2001</date></publicationStmt><notesStmt><note type="content">Fig. 1: Methods of determining which 200×200 m heathland survey squares (A–I) were treated as forming the territory of Dartford warbler. Warbler territories were recorded on a 100 m grid and thus their relationship to the heathland squares could be one of four types. These are shown as points 1, 2, 3 or 4. The three methods of assigning the 200 m heathland squares to territories are illustrated for each of the four points.</note><note type="content">Fig. 2: The distribution of Dartford warbler territories in the Dorset heathland in 1994. All 200×200 m heathland survey squares for 1996 are shown. Squares occupied by warbler territories are black and the remainder are grey. Territory estimation method 1 was used to assign territories to heathland squares. Major towns and the coastline are shown.</note><note type="content">Fig. 3: The relationship between the area of (a) dry/humid heath and, (b) mature Ulex europaeus to the percentage of squares with territories in 1974. The data were ranked in terms of dry/humid heath or mature Ulex area and then divided into groups of 100 squares. The proportion of these 100 squares containing territories according to method 1 was calculated.</note><note type="content">Table 1: Logistic regression model fits relating Dartford warbler territories in 1974 to heathland vegetation and land use attributes surveyed in 1978a</note><note type="content">Table 2: Logistic regression model fits relating Dartford warbler territories in 1984 to heathland vegetation and land use attributes surveyed in 1987a</note><note type="content">Table 3: Logistic regression model fits relating Dartford warbler territories in 1994 to heathland vegetation and land use attributes surveyed in 1996a</note><note type="content">Table 4: Differences among years in the mean values of key habitat variables in occupied squaresa</note></notesStmt><sourceDesc><biblStruct type="inbook"><analytic><title level="a" type="main" xml:lang="en">Territory selection by the Dartford warbler ( Sylvia undata ) in Dorset, England: the role of vegetation type, habitat fragmentation and population size</title><author xml:id="author-1"><persName><forename type="first">Leon J.L.</forename><surname>van den Berg</surname></persName><note type="biography">Current address: Department of Aquatic Biology and Environmental Biology, Katholieke Universiteit Nijmegen, Toernooiveld 1, 6525 ED Nijmegen, The Netherlands.</note><affiliation>Current address: Department of Aquatic Biology and Environmental Biology, Katholieke Universiteit Nijmegen, Toernooiveld 1, 6525 ED Nijmegen, The Netherlands.</affiliation><affiliation>NERC Centre for Ecology and Hydrology, CEH Dorset, Winfrith Technology Centre, Dorchester, Dorset DT2 8ZD, UK</affiliation></author><author xml:id="author-2"><persName><forename type="first">James.M.</forename><surname>Bullock</surname></persName><email>jmbul@ceh.ac.uk</email><note type="correspondence"><p>Corresponding author</p></note><affiliation>NERC Centre for Ecology and Hydrology, CEH Dorset, Winfrith Technology Centre, Dorchester, Dorset DT2 8ZD, UK</affiliation></author><author xml:id="author-3"><persName><forename type="first">Ralph T.</forename><surname>Clarke</surname></persName><affiliation>NERC Centre for Ecology and Hydrology, CEH Dorset, Winfrith Technology Centre, Dorchester, Dorset DT2 8ZD, UK</affiliation></author><author xml:id="author-4"><persName><forename type="first">Rowena H.W.</forename><surname>Langston</surname></persName><affiliation>RSPB, The Lodge, Sandy, Beds SG19 2DL, UK</affiliation></author><author xml:id="author-5"><persName><forename type="first">Rob J.</forename><surname>Rose</surname></persName><affiliation>NERC Centre for Ecology and Hydrology, CEH Dorset, Winfrith Technology Centre, Dorchester, Dorset DT2 8ZD, UK</affiliation></author></analytic><monogr><title level="j">Biological Conservation</title><title level="j" type="abbrev">BIOC</title><idno type="pISSN">0006-3207</idno><idno type="PII">S0006-3207(00)X0083-3</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="2001"></date><biblScope unit="volume">101</biblScope><biblScope unit="issue">2</biblScope><biblScope unit="page" from="217">217</biblScope><biblScope unit="page" to="228">228</biblScope></imprint></monogr><idno type="istex">1205E104D90543569CA1ABC6B16802FD341203F3</idno><idno type="DOI">10.1016/S0006-3207(01)00069-6</idno><idno type="PII">S0006-3207(01)00069-6</idno><idno type="ArticleID">1549</idno></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>2001</date></creation><langUsage><language ident="en">en</language></langUsage><abstract xml:lang="en"><p>The Dartford warbler (Sylvia undata) is of conservation concern throughout western Europe. In the UK conservation is centred on management of the warbler's lowland heath habitat. This study analysed the warbler's habitat requirements in Dorset, its UK population centre. Maps of breeding territories from 1974, 1984 and 1994 were linked to maps of heathland vegetation and adjacent land use from 1978, 1987 and 1996. Logistic regression showed territories were positively associated with the area of dry/humid heath, mature Ulex europaeus, bare soil, and more rarely with wet heath, young U. europaeus, U. gallii and Pinus scrub. There were negative responses to fragmentation (isolation and area of a heath), and the proximity of woodland, urban areas and intensive agriculture. Sub-optimal habitat was used in years of high population size. Habitat management for this species should consider not only heathland vegetation but also landscape factors such as fragmentation and the proximity of avoided land use types.</p></abstract><textClass xml:lang="en"><keywords scheme="keyword"><list><head>Keywords</head><item><term>Conservation management</term></item><item><term>Habitat selection</term></item><item><term>Heathland</term></item><item><term>Ulex europaeus</term></item><item><term>Urbanisation</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="2001">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/1205E104D90543569CA1ABC6B16802FD341203F3/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Elsevier, elements deleted: ce:floats; body; tail"><istex:xmlDeclaration>version="1.0" encoding="UTF-8"</istex:xmlDeclaration><istex:docType PUBLIC="-//ES//DTD journal article DTD version 4.5.2//EN//XML" URI="art452.dtd" name="istex:docType"><istex:entity SYSTEM="gr1" NDATA="IMAGE" name="gr1"></istex:entity><istex:entity SYSTEM="gr2" NDATA="IMAGE" name="gr2"></istex:entity><istex:entity SYSTEM="gr3" NDATA="IMAGE" name="gr3"></istex:entity></istex:docType><istex:document><converted-article version="4.5.2" docsubtype="fla" xml:lang="en"><item-info><jid>BIOC</jid><aid>1549</aid><ce:pii>S0006-3207(01)00069-6</ce:pii><ce:doi>10.1016/S0006-3207(01)00069-6</ce:doi><ce:copyright type="full-transfer" year="2001">Elsevier Science Ltd</ce:copyright></item-info><head><ce:title>Territory selection by the Dartford warbler (<ce:italic>Sylvia undata</ce:italic>) in Dorset, England: the role of vegetation type, habitat fragmentation and population size</ce:title><ce:author-group><ce:author><ce:initials>L.J.L.</ce:initials><ce:given-name>Leon J.L.</ce:given-name><ce:surname>van den Berg</ce:surname><ce:cross-ref refid="AFFA"><ce:sup loc="post">a</ce:sup></ce:cross-ref><ce:cross-ref refid="FN1"><ce:sup loc="post">1</ce:sup></ce:cross-ref></ce:author><ce:author><ce:initials>J.M.</ce:initials><ce:given-name>James.M.</ce:given-name><ce:surname>Bullock</ce:surname><ce:cross-ref refid="AFFA"><ce:sup loc="post">a</ce:sup></ce:cross-ref><ce:cross-ref refid="CORR1">*</ce:cross-ref><ce:e-address type="email">jmbul@ceh.ac.uk</ce:e-address></ce:author><ce:author><ce:initials>R.T.</ce:initials><ce:given-name>Ralph T.</ce:given-name><ce:surname>Clarke</ce:surname><ce:cross-ref refid="AFFA"><ce:sup loc="post">a</ce:sup></ce:cross-ref></ce:author><ce:author><ce:initials>R.H.W.</ce:initials><ce:given-name>Rowena H.W.</ce:given-name><ce:surname>Langston</ce:surname><ce:cross-ref refid="AFFB"><ce:sup loc="post">b</ce:sup></ce:cross-ref></ce:author><ce:author><ce:initials>R.J.</ce:initials><ce:given-name>Rob J.</ce:given-name><ce:surname>Rose</ce:surname><ce:cross-ref refid="AFFA"><ce:sup loc="post">a</ce:sup></ce:cross-ref></ce:author><ce:affiliation id="AFFA"><ce:label>a</ce:label><ce:textfn>NERC Centre for Ecology and Hydrology, CEH Dorset, Winfrith Technology Centre, Dorchester, Dorset DT2 8ZD, UK</ce:textfn></ce:affiliation><ce:affiliation id="AFFB"><ce:label>b</ce:label><ce:textfn>RSPB, The Lodge, Sandy, Beds SG19 2DL, UK</ce:textfn></ce:affiliation><ce:correspondence id="CORR1"><ce:label>*</ce:label><ce:text>Corresponding author</ce:text></ce:correspondence><ce:footnote id="FN1"><ce:label>1</ce:label><ce:note-para>Current address: Department of Aquatic Biology and Environmental Biology, Katholieke Universiteit Nijmegen, Toernooiveld 1, 6525 ED Nijmegen, The Netherlands.</ce:note-para></ce:footnote></ce:author-group><ce:date-received day="19" month="10" year="2000"></ce:date-received><ce:date-accepted day="12" month="2" year="2001"></ce:date-accepted><ce:abstract class="author"><ce:section-title>Abstract</ce:section-title><ce:abstract-sec><ce:simple-para view="all" id="simple-para.0045">The Dartford warbler (<ce:italic>Sylvia undata</ce:italic>) is of conservation concern throughout western Europe. In the UK conservation is centred on management of the warbler's lowland heath habitat. This study analysed the warbler's habitat requirements in Dorset, its UK population centre. Maps of breeding territories from 1974, 1984 and 1994 were linked to maps of heathland vegetation and adjacent land use from 1978, 1987 and 1996. Logistic regression showed territories were positively associated with the area of dry/humid heath, mature <ce:italic>Ulex europaeus,</ce:italic> bare soil, and more rarely with wet heath, young <ce:italic>U. europaeus</ce:italic>, <ce:italic>U. gallii</ce:italic> and <ce:italic>Pinus</ce:italic> scrub. There were negative responses to fragmentation (isolation and area of a heath), and the proximity of woodland, urban areas and intensive agriculture. Sub-optimal habitat was used in years of high population size. Habitat management for this species should consider not only heathland vegetation but also landscape factors such as fragmentation and the proximity of avoided land use types.</ce:simple-para></ce:abstract-sec></ce:abstract><ce:keywords class="keyword"><ce:section-title>Keywords</ce:section-title><ce:keyword><ce:text>Conservation management</ce:text></ce:keyword><ce:keyword><ce:text>Habitat selection</ce:text></ce:keyword><ce:keyword><ce:text>Heathland</ce:text></ce:keyword><ce:keyword><ce:text><ce:italic>Ulex europaeus</ce:italic></ce:text></ce:keyword><ce:keyword><ce:text>Urbanisation</ce:text></ce:keyword></ce:keywords></head></converted-article></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Territory selection by the Dartford warbler ( Sylvia undata ) in Dorset, England: the role of vegetation type, habitat fragmentation and population size</title></titleInfo><titleInfo type="alternative" lang="en" contentType="CDATA"><title>Territory selection by the Dartford warbler (</title></titleInfo><name type="personal"><namePart type="given">Leon J.L.</namePart><namePart type="family">van den Berg</namePart><affiliation>NERC Centre for Ecology and Hydrology, CEH Dorset, Winfrith Technology Centre, Dorchester, Dorset DT2 8ZD, UK</affiliation><description>Current address: Department of Aquatic Biology and Environmental Biology, Katholieke Universiteit Nijmegen, Toernooiveld 1, 6525 ED Nijmegen, The Netherlands.</description><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">James.M.</namePart><namePart type="family">Bullock</namePart><affiliation>E-mail: jmbul@ceh.ac.uk</affiliation><affiliation>NERC Centre for Ecology and Hydrology, CEH Dorset, Winfrith Technology Centre, Dorchester, Dorset DT2 8ZD, UK</affiliation><description>Corresponding author</description><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Ralph T.</namePart><namePart type="family">Clarke</namePart><affiliation>NERC Centre for Ecology and Hydrology, CEH Dorset, Winfrith Technology Centre, Dorchester, Dorset DT2 8ZD, UK</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Rowena H.W.</namePart><namePart type="family">Langston</namePart><affiliation>RSPB, The Lodge, Sandy, Beds SG19 2DL, UK</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Rob J.</namePart><namePart type="family">Rose</namePart><affiliation>NERC Centre for Ecology and Hydrology, CEH Dorset, Winfrith Technology Centre, Dorchester, Dorset DT2 8ZD, UK</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="research-article" displayLabel="Full-length article"></genre><originInfo><publisher>ELSEVIER</publisher><dateIssued encoding="w3cdtf">2001</dateIssued><copyrightDate encoding="w3cdtf">2001</copyrightDate></originInfo><language><languageTerm type="code" authority="iso639-2b">eng</languageTerm><languageTerm type="code" authority="rfc3066">en</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType></physicalDescription><abstract lang="en">The Dartford warbler (Sylvia undata) is of conservation concern throughout western Europe. In the UK conservation is centred on management of the warbler's lowland heath habitat. This study analysed the warbler's habitat requirements in Dorset, its UK population centre. Maps of breeding territories from 1974, 1984 and 1994 were linked to maps of heathland vegetation and adjacent land use from 1978, 1987 and 1996. Logistic regression showed territories were positively associated with the area of dry/humid heath, mature Ulex europaeus, bare soil, and more rarely with wet heath, young U. europaeus, U. gallii and Pinus scrub. There were negative responses to fragmentation (isolation and area of a heath), and the proximity of woodland, urban areas and intensive agriculture. Sub-optimal habitat was used in years of high population size. Habitat management for this species should consider not only heathland vegetation but also landscape factors such as fragmentation and the proximity of avoided land use types.</abstract><note type="content">Fig. 1: Methods of determining which 200×200 m heathland survey squares (A–I) were treated as forming the territory of Dartford warbler. Warbler territories were recorded on a 100 m grid and thus their relationship to the heathland squares could be one of four types. These are shown as points 1, 2, 3 or 4. The three methods of assigning the 200 m heathland squares to territories are illustrated for each of the four points.</note><note type="content">Fig. 2: The distribution of Dartford warbler territories in the Dorset heathland in 1994. All 200×200 m heathland survey squares for 1996 are shown. Squares occupied by warbler territories are black and the remainder are grey. Territory estimation method 1 was used to assign territories to heathland squares. Major towns and the coastline are shown.</note><note type="content">Fig. 3: The relationship between the area of (a) dry/humid heath and, (b) mature Ulex europaeus to the percentage of squares with territories in 1974. The data were ranked in terms of dry/humid heath or mature Ulex area and then divided into groups of 100 squares. The proportion of these 100 squares containing territories according to method 1 was calculated.</note><note type="content">Table 1: Logistic regression model fits relating Dartford warbler territories in 1974 to heathland vegetation and land use attributes surveyed in 1978a</note><note type="content">Table 2: Logistic regression model fits relating Dartford warbler territories in 1984 to heathland vegetation and land use attributes surveyed in 1987a</note><note type="content">Table 3: Logistic regression model fits relating Dartford warbler territories in 1994 to heathland vegetation and land use attributes surveyed in 1996a</note><note type="content">Table 4: Differences among years in the mean values of key habitat variables in occupied squaresa</note><subject lang="en"><genre>Keywords</genre><topic>Conservation management</topic><topic>Habitat selection</topic><topic>Heathland</topic><topic>Ulex europaeus</topic><topic>Urbanisation</topic></subject><relatedItem type="host"><titleInfo><title>Biological Conservation</title></titleInfo><titleInfo type="abbreviated"><title>BIOC</title></titleInfo><genre type="journal">journal</genre><originInfo><dateIssued encoding="w3cdtf">200110</dateIssued></originInfo><identifier type="ISSN">0006-3207</identifier><identifier type="PII">S0006-3207(00)X0083-3</identifier><part><date>200110</date><detail type="volume"><number>101</number><caption>vol.</caption></detail><detail type="issue"><number>2</number><caption>no.</caption></detail><extent unit="issue pages"><start>131</start><end>262</end></extent><extent unit="pages"><start>217</start><end>228</end></extent></part></relatedItem><identifier type="istex">1205E104D90543569CA1ABC6B16802FD341203F3</identifier><identifier type="DOI">10.1016/S0006-3207(01)00069-6</identifier><identifier type="PII">S0006-3207(01)00069-6</identifier><identifier type="ArticleID">1549</identifier><accessCondition type="use and reproduction" contentType="copyright">©2001 Elsevier Science Ltd</accessCondition><recordInfo><recordContentSource>ELSEVIER</recordContentSource><recordOrigin>Elsevier Science Ltd, ©2001</recordOrigin></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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