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Tree species composition rather than diversity triggers associational resistance to the pine processionary moth
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Tree species composition rather than diversity triggers associational resistance to the pine processionary moth
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biblio_sort_title (String, 64 characters ) Tree species composition rather than diversity ...
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Tree species composition rather than diversity triggers associat
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biblio_year (String, 4 characters ) 2014
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biblio_volume (String, 2 characters ) 15
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biblio_pages (String, 9 characters ) 516 - 523
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biblio_date (String, 8 characters ) 2014/9//
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biblio_abst_e (String, 3036 characters ) <p>The reduction of <a aria-disabled="false" cl...
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<p>The reduction of <a aria-disabled="false" class="entity concept acknowledged" href="http://fundiveuropektp.boku.ac.at/tematres/vocab/?tema=62" rel="skos:related" resource="http://fundiveuropektp.boku.ac.at/tematres/vocab/?tema=62">insect herbivory</a> is one of the services provided by <a aria-disabled="false" class="entity concept acknowledged" href="http://fundiveuropektp.boku.ac.at/tematres/vocab/?tema=32" rel="skos:related" resource="http://fundiveuropektp.boku.ac.at/tematres/vocab/?tema=32">tree diversity</a> in forest ecosystems. While it is increasingly acknowledged that the compositional characteristics of <strong class="withSuggestions">tree species</strong> assemblages play a major role in triggering associational <a aria-disabled="false" class="entity concept acknowledged" href="http://fundiveuropektp.boku.ac.at/tematres/vocab/?tema=151" rel="skos:related" resource="http://fundiveuropektp.boku.ac.at/tematres/vocab/?tema=151">resistance</a> to herbivores, underlying mechanisms are less well known. We addressed this question in the ORPHEE experiment by assessing pine processionary moth infestations (Thaumetopoea pityocampa) across a <strong class="withSuggestions">tree diversity</strong> gradient from pine monocultures to five <strong class="withSuggestions">species mixtures</strong>. We showed that <a aria-disabled="false" class="entity concept acknowledged" href="http://fundiveuropektp.boku.ac.at/tematres/vocab/?tema=24" rel="skos:related" resource="http://fundiveuropektp.boku.ac.at/tematres/vocab/?tema=24">tree species</a> richness per se had no effect on the probability of attack by this pest. By contrast, the infestation rate was strongly dependent on plot composition. Mixtures of pines (Pinus pinaster) and birches (Betula pendula) were less prone to T. pityocampa infestations, whereas mixtures of pines and oaks (Quercus spp.) were more often attacked than pine monocultures. By taking into account the relative height of pines and associated broadleaved species, this effect could be explained by pine apparency. Pines were on average 343 ± 5 cm height. Birches, as fast growing trees, were slightly taller than pines (363 ± 6 cm), while oak trees were significantly smaller (74 ± 1 cm). Host trees of T. pityocampa were then partly hidden in mixtures of pines and birches but more apparent in mixtures with oaks. We suggest that reduced pine apparency disrupted visual cues used by female moths to select host trees prior to oviposition. This study highlights the need to take into account <strong class="withSuggestions">tree traits</strong> such as <a aria-disabled="false" class="entity concept acknowledged" href="http://fundiveuropektp.boku.ac.at/tematres/vocab/?tema=51" rel="skos:related" resource="http://fundiveuropektp.boku.ac.at/tematres/vocab/?tema=51">growth rate</a> when selecting the <strong class="withSuggestions">tree species</strong> that have to be associated in order to improve forest <strong class="withSuggestions">resistance</strong> to pest insects.</p>
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http://www.sciencedirect.com/science/article/pii/S1439179114000693
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Content using this publication as evidence
Tree diversity: an ecological weapon against pest insects (Knowledge Element)