Human altered disturbance patterns and forest succession: impacts of competition and ungulate herbivory.
Identifieur interne : 000908 ( Main/Exploration ); précédent : 000907; suivant : 000909Human altered disturbance patterns and forest succession: impacts of competition and ungulate herbivory.
Auteurs : Jordan D. Maxwell [États-Unis] ; Aaron C. Rhodes [États-Unis] ; Samuel B. St Clair [États-Unis]Source :
- Oecologia [ 1432-1939 ] ; 2019.
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Abstract
Human activities are altering patterns of ungulate herbivory and wildfire regimes globally with large potential impacts on plant community succession and ecosystem resilience. Aspen (Populus tremuloides) is a keystone species which co-exists with conifer species across temperate forests in North America. Aspen sucker regeneration which is the foundation of aspen-conifer forests succession is often a targeted food source by multiple ungulate species. Using a region-wide exclosure network across a broad gradient of aspen-conifer overstory abundance, we empirically tested the effects of ungulate herbivory and conifer competition (that increases with fire suppression), on the regeneration and recruitment of aspen forests over a 4-year period. The study results indicate that ungulate herbivory and increasing abundance of overstory conifers dramatically reduced aspen regeneration and recruitment success. The average height of aspen suckers exposed to ungulate herbivory was 72% shorter than aspen suckers in fenced plots and resulted in 24% less recruitment. There was a 9% decrease in aspen recruitment and 12% decrease in average aspen height with every 20% increase in overstory conifer density. Aspen suckers were most vulnerable to herbivory at 70 cm height, with the probability of herbivory decreasing under 50 cm or above 90 cm. Steep slope angles and higher winter precipitation increased aspen regeneration and recruitment success. Reduction in aspen recruitment in response to ungulate herbivory and competition by conifers may result in loss of biodiversity, altered forest function and loss of key ecosystem services because of the important role that aspen plays in facilitating forest succession and biodiversity.
DOI: 10.1007/s00442-019-04370-8
PubMed: 30887106
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Maxwell</name><affiliation wicri:level="1"><nlm:affiliation>Department of Plant and Wildlife Sciences, Brigham Young University, 4105 LSB, Provo, UT, 84602, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Plant and Wildlife Sciences, Brigham Young University, 4105 LSB, Provo, UT, 84602</wicri:regionArea><wicri:noRegion>84602</wicri:noRegion></affiliation></author><author><name sortKey="Rhodes, Aaron C" sort="Rhodes, Aaron C" uniqKey="Rhodes A" first="Aaron C" last="Rhodes">Aaron C. Rhodes</name><affiliation wicri:level="1"><nlm:affiliation>Department of Plant and Wildlife Sciences, Brigham Young University, 4105 LSB, Provo, UT, 84602, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Plant and Wildlife Sciences, Brigham Young University, 4105 LSB, Provo, UT, 84602</wicri:regionArea><wicri:noRegion>84602</wicri:noRegion></affiliation></author><author><name sortKey="St Clair, Samuel B" sort="St Clair, Samuel B" uniqKey="St Clair S" first="Samuel B" last="St Clair">Samuel B. St Clair</name><affiliation wicri:level="1"><nlm:affiliation>Department of Plant and Wildlife Sciences, Brigham Young University, 4105 LSB, Provo, UT, 84602, USA. stclair@byu.edu.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Plant and Wildlife Sciences, Brigham Young University, 4105 LSB, Provo, UT, 84602</wicri:regionArea><wicri:noRegion>84602</wicri:noRegion></affiliation></author></analytic><series><title level="j">Oecologia</title><idno type="eISSN">1432-1939</idno><imprint><date when="2019" type="published">2019</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Animals (MeSH)</term><term>Deer (MeSH)</term><term>Ecosystem (MeSH)</term><term>Forests (MeSH)</term><term>Herbivory (MeSH)</term><term>Humans (MeSH)</term><term>North America (MeSH)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Amérique du Nord (MeSH)</term><term>Animaux (MeSH)</term><term>Cervidae (MeSH)</term><term>Forêts (MeSH)</term><term>Herbivorie (MeSH)</term><term>Humains (MeSH)</term><term>Écosystème (MeSH)</term></keywords><keywords scheme="MESH" type="geographic" xml:lang="en"><term>North America</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Animals</term><term>Deer</term><term>Ecosystem</term><term>Forests</term><term>Herbivory</term><term>Humans</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Amérique du Nord</term><term>Animaux</term><term>Cervidae</term><term>Forêts</term><term>Herbivorie</term><term>Humains</term><term>Écosystème</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Human activities are altering patterns of ungulate herbivory and wildfire regimes globally with large potential impacts on plant community succession and ecosystem resilience. Aspen (Populus tremuloides) is a keystone species which co-exists with conifer species across temperate forests in North America. Aspen sucker regeneration which is the foundation of aspen-conifer forests succession is often a targeted food source by multiple ungulate species. Using a region-wide exclosure network across a broad gradient of aspen-conifer overstory abundance, we empirically tested the effects of ungulate herbivory and conifer competition (that increases with fire suppression), on the regeneration and recruitment of aspen forests over a 4-year period. The study results indicate that ungulate herbivory and increasing abundance of overstory conifers dramatically reduced aspen regeneration and recruitment success. The average height of aspen suckers exposed to ungulate herbivory was 72% shorter than aspen suckers in fenced plots and resulted in 24% less recruitment. There was a 9% decrease in aspen recruitment and 12% decrease in average aspen height with every 20% increase in overstory conifer density. Aspen suckers were most vulnerable to herbivory at 70 cm height, with the probability of herbivory decreasing under 50 cm or above 90 cm. Steep slope angles and higher winter precipitation increased aspen regeneration and recruitment success. Reduction in aspen recruitment in response to ungulate herbivory and competition by conifers may result in loss of biodiversity, altered forest function and loss of key ecosystem services because of the important role that aspen plays in facilitating forest succession and biodiversity.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" IndexingMethod="Automated" Owner="NLM"><PMID Version="1">30887106</PMID><DateCompleted><Year>2019</Year><Month>09</Month><Day>23</Day></DateCompleted><DateRevised><Year>2020</Year><Month>02</Month><Day>25</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1432-1939</ISSN><JournalIssue CitedMedium="Internet"><Volume>189</Volume><Issue>4</Issue><PubDate><Year>2019</Year><Month>Apr</Month></PubDate></JournalIssue><Title>Oecologia</Title><ISOAbbreviation>Oecologia</ISOAbbreviation></Journal><ArticleTitle>Human altered disturbance patterns and forest succession: impacts of competition and ungulate herbivory.</ArticleTitle><Pagination><MedlinePgn>1061-1070</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1007/s00442-019-04370-8</ELocationID><Abstract><AbstractText>Human activities are altering patterns of ungulate herbivory and wildfire regimes globally with large potential impacts on plant community succession and ecosystem resilience. Aspen (Populus tremuloides) is a keystone species which co-exists with conifer species across temperate forests in North America. Aspen sucker regeneration which is the foundation of aspen-conifer forests succession is often a targeted food source by multiple ungulate species. Using a region-wide exclosure network across a broad gradient of aspen-conifer overstory abundance, we empirically tested the effects of ungulate herbivory and conifer competition (that increases with fire suppression), on the regeneration and recruitment of aspen forests over a 4-year period. The study results indicate that ungulate herbivory and increasing abundance of overstory conifers dramatically reduced aspen regeneration and recruitment success. The average height of aspen suckers exposed to ungulate herbivory was 72% shorter than aspen suckers in fenced plots and resulted in 24% less recruitment. There was a 9% decrease in aspen recruitment and 12% decrease in average aspen height with every 20% increase in overstory conifer density. Aspen suckers were most vulnerable to herbivory at 70 cm height, with the probability of herbivory decreasing under 50 cm or above 90 cm. Steep slope angles and higher winter precipitation increased aspen regeneration and recruitment success. Reduction in aspen recruitment in response to ungulate herbivory and competition by conifers may result in loss of biodiversity, altered forest function and loss of key ecosystem services because of the important role that aspen plays in facilitating forest succession and biodiversity.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Maxwell</LastName><ForeName>Jordan D</ForeName><Initials>JD</Initials><AffiliationInfo><Affiliation>Department of Plant and Wildlife Sciences, Brigham Young University, 4105 LSB, Provo, UT, 84602, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Rhodes</LastName><ForeName>Aaron C</ForeName><Initials>AC</Initials><Identifier Source="ORCID">http://orcid.org/0000-0002-4501-0726</Identifier><AffiliationInfo><Affiliation>Department of Plant and Wildlife Sciences, Brigham Young University, 4105 LSB, Provo, UT, 84602, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>St Clair</LastName><ForeName>Samuel B</ForeName><Initials>SB</Initials><Identifier Source="ORCID">http://orcid.org/0000-0001-6612-0329</Identifier><AffiliationInfo><Affiliation>Department of Plant and Wildlife Sciences, Brigham Young University, 4105 LSB, Provo, UT, 84602, USA. stclair@byu.edu.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><GrantList CompleteYN="Y"><Grant><GrantID>2012</GrantID><Agency>Utah Division of Natural Resources</Agency><Country></Country></Grant></GrantList><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2019</Year><Month>03</Month><Day>18</Day></ArticleDate></Article><MedlineJournalInfo><Country>Germany</Country><MedlineTA>Oecologia</MedlineTA><NlmUniqueID>0150372</NlmUniqueID><ISSNLinking>0029-8549</ISSNLinking></MedlineJournalInfo><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D000818" MajorTopicYN="N">Animals</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D003670" MajorTopicYN="Y">Deer</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D017753" MajorTopicYN="N">Ecosystem</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D065928" MajorTopicYN="N">Forests</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D060434" MajorTopicYN="Y">Herbivory</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D006801" MajorTopicYN="N">Humans</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D009656" MajorTopicYN="N" Type="Geographic">North America</DescriptorName></MeshHeading></MeshHeadingList><KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="N">Aspen</Keyword><Keyword MajorTopicYN="N">Deer</Keyword><Keyword MajorTopicYN="N">Elk</Keyword><Keyword MajorTopicYN="N">Fire</Keyword><Keyword MajorTopicYN="N">Herbivory</Keyword><Keyword MajorTopicYN="N">Populus tremuloides</Keyword><Keyword 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Maxwell</name></noRegion><name sortKey="Rhodes, Aaron C" sort="Rhodes, Aaron C" uniqKey="Rhodes A" first="Aaron C" last="Rhodes">Aaron C. Rhodes</name><name sortKey="St Clair, Samuel B" sort="St Clair, Samuel B" uniqKey="St Clair S" first="Samuel B" last="St Clair">Samuel B. St Clair</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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