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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Short Delay in Timing of Emergence Determines Establishment Success in <italic>Pinus sylvestris</italic> across Microhabitats</title><author><name sortKey="Castro, Jorge" sort="Castro, Jorge" uniqKey="Castro J" first="Jorge" last="Castro">Jorge Castro</name></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">17056614</idno><idno type="pmc">2803580</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2803580</idno><idno type="RBID">PMC:2803580</idno><idno type="doi">10.1093/aob/mcl208</idno><date when="2006">2006</date><idno type="wicri:Area/Pmc/Corpus">000158</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Corpus" wicri:corpus="PMC">000158</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Short Delay in Timing of Emergence Determines Establishment Success in <italic>Pinus sylvestris</italic> across Microhabitats</title><author><name sortKey="Castro, Jorge" sort="Castro, Jorge" uniqKey="Castro J" first="Jorge" last="Castro">Jorge Castro</name></author></analytic><series><title level="j">Annals of Botany</title><idno type="ISSN">0305-7364</idno><idno type="eISSN">1095-8290</idno><imprint><date when="2006">2006</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p>• <italic>Background and Aims</italic> The date of emergence may have far-reaching implications for seedling performance. Seedlings emerging early in the growing season often have a greater rate of survival or grow better if early emergence provides advantages with respect to an environmental cue. As a result, the benefits of early emergence may be lost if the environmental stress creating the differences among cohorts disappears. The experimental manipulation under field conditions of the factors that constitute the main sources of stress for seedling establishment is thus a straightforward method to evaluate the impact of date of emergence on seedling establishment under realistic conditions.</p><p>• <italic>Methods</italic> Two field experiments were performed to analyse the effect of emergence date on survival and first-year growth of Scots pine seedlings in natural mountain forests in south-east Spain. Two main environmental factors that determine seedling success in these mountains were considered: (1) microhabitat type (monitoring the effect of date of emergence in the three most common microhabitats where seedlings recruit); (2) summer drought (monitored by an irrigation treatment with control and watered sampling points).</p><p>• <italic>Key Results</italic> Overall, early emergence resulted in a higher probability of survival and better growth in the two experiments and across microhabitats. However, the reduction in summer drought did not diminish the differences observed among cohorts: all cohorts increased their survival and growth, but early cohorts still had a clear advantage.</p><p>• <italic>Conclusions</italic> Date of emergence determines establishment success of <italic>Pinus sylvestris</italic> seedlings, even if cohorts are separated by only a few days, irrespective of the intensity of summer drought. The experimental design, covering a gradient of light intensity and soil moisture that simulates conditions of the regeneration niche of Scots pine across its geographical range, allows the results to be extrapolated to other areas of the species. Date of emergence is thus likely to have a large impact on the demography of Scots pine across its geographical range.</p></div></front></TEI><pmc article-type="research-article"><pmc-comment>The publisher of this article does not allow downloading of the full text in XML form.</pmc-comment>
<front><journal-meta><journal-id journal-id-type="nlm-ta">Ann Bot</journal-id><journal-id journal-id-type="publisher-id">annbot</journal-id><journal-title-group><journal-title>Annals of Botany</journal-title></journal-title-group><issn pub-type="ppub">0305-7364</issn><issn pub-type="epub">1095-8290</issn><publisher><publisher-name>Oxford University Press</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="pmid">17056614</article-id><article-id pub-id-type="pmc">2803580</article-id><article-id pub-id-type="publisher-id">mcl208</article-id><article-id pub-id-type="doi">10.1093/aob/mcl208</article-id><article-categories><subj-group subj-group-type="heading"><subject>Original Articles</subject></subj-group></article-categories><title-group><article-title>Short Delay in Timing of Emergence Determines Establishment Success in <italic>Pinus sylvestris</italic> across Microhabitats</article-title></title-group><contrib-group><contrib contrib-type="author"><name><surname>CASTRO</surname><given-names>JORGE</given-names></name><xref ref-type="corresp" rid="cor1">*</xref></contrib></contrib-group><aff id="d31e30"> Grupo de Ecología Terrestre. Departamento de Ecología, Facultad de Ciencias Universidad de Granada. E-18071 Granada, Spain</aff><author-notes><corresp id="cor1"><sup>*</sup>E-mail: <email>jorge@ugr.es</email></corresp></author-notes><pub-date pub-type="ppub"><month>12</month><year>2006</year></pub-date><volume>98</volume><issue>6</issue><fpage>1233</fpage><lpage>1240</lpage><history><date date-type="received"><day>8</day><month>5</month><year>2006</year></date><date date-type="rev-recd"><day>24</day><month>7</month><year>2006</year></date><date date-type="accepted"><day>30</day><month>8</month><year>2006</year></date></history><permissions><copyright-statement>© The Author 2006. Published by Oxford University Press on behalf of the Annals of Botany Company. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org</copyright-statement><copyright-year>2006</copyright-year></permissions><abstract><p>• <italic>Background and Aims</italic> The date of emergence may have far-reaching implications for seedling performance. Seedlings emerging early in the growing season often have a greater rate of survival or grow better if early emergence provides advantages with respect to an environmental cue. As a result, the benefits of early emergence may be lost if the environmental stress creating the differences among cohorts disappears. The experimental manipulation under field conditions of the factors that constitute the main sources of stress for seedling establishment is thus a straightforward method to evaluate the impact of date of emergence on seedling establishment under realistic conditions.</p><p>• <italic>Methods</italic> Two field experiments were performed to analyse the effect of emergence date on survival and first-year growth of Scots pine seedlings in natural mountain forests in south-east Spain. Two main environmental factors that determine seedling success in these mountains were considered: (1) microhabitat type (monitoring the effect of date of emergence in the three most common microhabitats where seedlings recruit); (2) summer drought (monitored by an irrigation treatment with control and watered sampling points).</p><p>• <italic>Key Results</italic> Overall, early emergence resulted in a higher probability of survival and better growth in the two experiments and across microhabitats. However, the reduction in summer drought did not diminish the differences observed among cohorts: all cohorts increased their survival and growth, but early cohorts still had a clear advantage.</p><p>• <italic>Conclusions</italic> Date of emergence determines establishment success of <italic>Pinus sylvestris</italic> seedlings, even if cohorts are separated by only a few days, irrespective of the intensity of summer drought. The experimental design, covering a gradient of light intensity and soil moisture that simulates conditions of the regeneration niche of Scots pine across its geographical range, allows the results to be extrapolated to other areas of the species. Date of emergence is thus likely to have a large impact on the demography of Scots pine across its geographical range.</p></abstract><kwd-group><kwd>Cohort effects</kwd><kwd>cohort of emergence</kwd><kwd>date of emergence</kwd><kwd>delayed emergence</kwd><kwd>irrigation experiments</kwd><kwd><italic>Pinus sylvestris</italic></kwd><kwd>seedling establishment</kwd><kwd>Sierra Nevada National Park</kwd><kwd>summer drought</kwd></kwd-group></article-meta></front></pmc></record>Pour manipuler ce document sous Unix (Dilib)
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