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<title>UTas ePrints - How does ontogeny in a Eucalyptus species affect patterns of herbivory by Brushtail Possums?</title>
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<meta content="Loney, Prue E." name="eprints.creators_name" />
<meta content="McArthur, Clare" name="eprints.creators_name" />
<meta content="Potts, Bradley M." name="eprints.creators_name" />
<meta content="Jordan, Gregory J." name="eprints.creators_name" />
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<meta content="2007-09-03" name="eprints.datestamp" />
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<meta content="How does ontogeny in a Eucalyptus species affect patterns
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<meta content="eucalypt, mammalian herbivory, ontogeny, phase change, plant secondary metabolites" name="eprints.keywords" />
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<meta content="Summary
1. Comparisons of adult and juvenile plant stages are often confounded by other factors such as differences in height between plants. However, these factors can be teased apart using common garden experiments and appropriate sampling designs.
2. Using paired sampling of upper and lower canopies of Eucalyptus nitens trees,which were growing in a common environment trial and only one of which had undergone the transition to adult foliage, this study assessed the effects of ontogeny and canopy position on the feeding preferences of Common Brushtail Possums (Trichosurus vulpecula) in captive feeding trials under choice conditions.
3. Possums preferred juvenile foliage over adult foliage. In contrast, canopy position did not influence preferences.
4. Adult foliage contained significantly less sideroxylonals (a compound known to deter herbivory by Brushtail Possums), but was significantly tougher (with thicker cuticle, more fibre, more lignin and a higher percentage dry mass) than juvenile foliage, suggesting that leaf toughness was more significant than defensive chemistry in influencing intake by possums. Adult foliage did not differ significantly from juvenile foliage in nitrogen, total phenolics or essential oil concentration.
5. Greater resistance to herbivory of adult foliage compared with juvenile foliage by a significant browser of eucalypt tree foliage could contribute to selection for an earlier change from juvenile to adult foliage in areas that are heavily browsed by possums." name="eprints.abstract" />
<meta content="2006-12" name="eprints.date" />
<meta content="published" name="eprints.date_type" />
<meta content="Functional Ecology" name="eprints.publication" />
<meta content="20" name="eprints.volume" />
<meta content="6" name="eprints.number" />
<meta content="982-988" name="eprints.pagerange" />
<meta content="10.1111/j.1365-2435.2006.01193.x" name="eprints.id_number" />
<meta content="UNSPECIFIED" name="eprints.thesis_type" />
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<meta content="http://dx.doi.org/10.1111/j.1365-2435.2006.01193.x" name="eprints.official_url" />
<meta content="Andrew RL, Peakall R, Wallis IR, Wood JT, Knight EJ, Foley WJ (2005) Marker-based quantitative genetics in the wild?: The heritability and genetic correlation of chemical defenses in Eucalyptus. Genetics 171:1989-1998
Boege K, Marquis RJ (2005) Facing herbivory as you grow up: the ontogeny of resistance in plants. Trends in Ecology and Evolution 20:441-448
Bryant JP, Julkunen-Tiitto R (1995) Ontogenetic development of chemical defense by seedling resin birch: energy cost of defense production. Journal of Chemical Ecology 21:883-896
Choong MF (1996) What makes a leaf tough and how this affects the pattern of Castanopsis fiss leaf consumption by caterpillars. Functional Ecology 10:668-674
Close DC, McArthur C (2002) Rethinking the role of many plant phenolics - protection from photodamage not herbivores? Oikos 99:166-172
Dominy NJ, Lucas PW, Wright SJ (2003) Mechanisms and chemistry of rain forest leaves: canopy and understorey compared. Journal of Experimental Botany 54:2007-2014
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Foley WJ, Lawler IR, Moore BD, Marsh KJ, Wallis IR (2004) Diet selection in marsupial folivores of Eucalyptus: the role of plant secondary metabolites. In: Goldingay RL, Jackson SM (eds) Possums and gliders. Surrey Beatty and Sons, Chipping Norton, pp 207-221
Graham HD (1992) Stabilization of the prussian blue color in the determination of polyphenols. Journal of Agricultural and Food Chemistry 40:801-805
Hagerman AE (1995) Tannin Analysis, 2 edn. Miami University, Oxford, Ohio
Haukioja E, Koricheva J (2000) Tolerance to herbivory in woody vs. herbaceous plants. Evolutionary Ecology 14:551-562
Iddles TL, Read J, Sanson GD (2003) The potential contribution of biomechanical properties to anti-herbivore defence in seedlings of six Australian rainforest trees. Australian Journal of Botany 51:119-128
Jachmann H (1989) Food selection by elephants in the Miobbo biome, in relation to leaf chemistry. Biochemical Systematics and Ecology 17:15-24
Jordan GJ, Potts BM, Chalmers P, Wiltshire RJE (2000) Quantitative genetic evidence that the timing of vegetative phase change in Eucalyptus globulus ssp. globulus is and adaptive trait. Australian Journal of Botany 48:561-567
Jordan GJ, Dillon RA, Weston PH (2005) Solar radiation as a factor in the evolution of scleromorphic leaf anatomy in the Proteaceae. American Journal of Botany 92:789-796
Kearsley MJC, Whitham TG (1989) Developmental changes in resistance to herbivory - implications for individuals and populations. Ecology 70:422-434
Lawler IR, Foley WJ, Eschler BM, Pass DM, Handasyde K (1998) Intraspecific variation in Eucalyptus secondary metabolites determines food intake by folivorous marsupials. Oecologia 116:160-169
Lawler IR, Foley WJ, Eschler BM (2000) Foliar concentration of a single toxin creates habitat patchiness for a marsupial folivore. Ecology 81:1327-1338
Lawrence R, Potts BM, Whitham TG (2003) Relative importance of plant ontogeny, host genetic variation and leaf age for a common herbivore. Ecology 85:1171-1178
Li H, Madden JL, Potts BM (1996) Variation in volatile leaf oils of the Tasmanian Eucalyptus species. II. Subgenus Symphyomyrtus. Biochemical Systematics and Ecology 24:547-569
Loney PE, McArthur C, Sanson G, Davies NW, Close DC, Jordan GJ (2006) How do soil nutrients affect within-plant patterns of herbivory in seedlings of Eucalyptus nitens? Oecologia 150:409-420
Lowther JR (1980) Use of a single sulphuric acid-hydrogen peroxide digest for the analysis of Pinus radiata needles. Soil Science and Plant Analysis 11:175-188
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O'Reilly-Wapstra J, McArthur C, Potts BM (2004) Linking plant genotype, plant defensive chemistry and mammal browsing in Eucalyptus species. Functional Ecology 18:677-684
O'Reilly-Wapstra J, Potts BM, McArthur C, Davies NW (2005) Effects of nutrient variability on the genetic-based resistance of Eucalyptus globulus to a mammalian herbivore and on plant defensive chemistry. Oecologia 142:597-605
Ohmart CP, Edwards PB (1991) Insect herbivory on Eucalyptus. Annual Review of Entomology 36:637-657
Pederick LA (1979) Natural variation in shining gum (Eucalyptus nitens). Australian Journal of Forest Research 9:41-63
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Sands DPA, Brancatini VA (1991) A portable penetrometer for measuring leaf toughness in insect herbivory studies. Proceedings of the Entomological Society, Washington 93:786-788
Steinbauer MJ, Clarke AR, Madden JL (1998) Oviposition preference of a Eucalyptus herbivore and the importance of leaf age on interspecific host choice. Ecological Entomology 23:201-206
Stowe KA, Marquis RJ, Hochwender CG, Simms EL (2000) The evolutionary ecology of tolerance to consumer damage. Annual Review of Ecology and Systematics 31:565-595
Tahvanainen J, Helle E, Julkunen-Tiitto R, Lavola A (1985) Phenolic compounds of willow bark as deterrents against feeding by mountain hare. Oecologia 65:319-323
Wallis IR, Herlt AJ, Eschler BM, Takasaki M, Foley WJ (2003) Quantification of sideroxylonals in Eucalyptus foliage by high-performance liquid chromatography. Phytochem Anal 14:360-365
Warner PJ, Cushman JH (2002) Influence of herbivores on a perennial plant: variation with life history stage and herbivore species. Oecologia 132:77-85
Wiggins NL, Marsh KJ, Wallis IR, Foley WJ, McArthur C (2006) Sideroxylonal in Eucalyptus foliage influences foraging behaviour of an arboreal folivore. Oecologia 147:272-279
Wiltshire RJE, Potts BM, Reid JB (1998) The genetic control of reproductive and vegetative phase change in the Eucalyptus risdonii/E. tenuramis complex. Australian Journal of Botany 46:45-63
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<meta content="Summary
1. Comparisons of adult and juvenile plant stages are often confounded by other factors such as differences in height between plants. However, these factors can be teased apart using common garden experiments and appropriate sampling designs.
2. Using paired sampling of upper and lower canopies of Eucalyptus nitens trees,which were growing in a common environment trial and only one of which had undergone the transition to adult foliage, this study assessed the effects of ontogeny and canopy position on the feeding preferences of Common Brushtail Possums (Trichosurus vulpecula) in captive feeding trials under choice conditions.
3. Possums preferred juvenile foliage over adult foliage. In contrast, canopy position did not influence preferences.
4. Adult foliage contained significantly less sideroxylonals (a compound known to deter herbivory by Brushtail Possums), but was significantly tougher (with thicker cuticle, more fibre, more lignin and a higher percentage dry mass) than juvenile foliage, suggesting that leaf toughness was more significant than defensive chemistry in influencing intake by possums. Adult foliage did not differ significantly from juvenile foliage in nitrogen, total phenolics or essential oil concentration.
5. Greater resistance to herbivory of adult foliage compared with juvenile foliage by a significant browser of eucalypt tree foliage could contribute to selection for an earlier change from juvenile to adult foliage in areas that are heavily browsed by possums." name="DC.description" />
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<h1 class="ep_tm_pagetitle">How does ontogeny in a Eucalyptus species affect patterns of herbivory by Brushtail Possums?</h1>
<p style="margin-bottom: 1em" class="not_ep_block"><span class="person_name">Loney, Prue E.</span> and <span class="person_name">McArthur, Clare</span> and <span class="person_name">Potts, Bradley M.</span> and <span class="person_name">Jordan, Gregory J.</span> (2006) <xhtml:em>How does ontogeny in a Eucalyptus species affect patterns of herbivory by Brushtail Possums?</xhtml:em> Functional Ecology, 20 (6). pp. 982-988.</p><p style="margin-bottom: 1em" class="not_ep_block"></p><table style="margin-bottom: 1em" class="not_ep_block"><tr><td valign="top" style="text-align:center"><a href="http://eprints.utas.edu.au/1774/1/Prue_Phase_Change.pdf"><img alt="[img]" src="http://eprints.utas.edu.au/style/images/fileicons/application_pdf.png" border="0" class="ep_doc_icon" /></a></td><td valign="top"><a href="http://eprints.utas.edu.au/1774/1/Prue_Phase_Change.pdf"><span class="ep_document_citation">PDF</span></a> - Full text restricted - Requires a PDF viewer<br />109Kb</td><td><form method="get" accept-charset="utf-8" action="http://eprints.utas.edu.au/cgi/request_doc"><input value="2254" name="docid" accept-charset="utf-8" type="hidden" /><div class=""><input value="Request a copy" name="_action_null" class="ep_form_action_button" onclick="return EPJS_button_pushed( '_action_null' )" type="submit" /> </div></form></td></tr></table><p style="margin-bottom: 1em" class="not_ep_block">Official URL: <a href="http://dx.doi.org/10.1111/j.1365-2435.2006.01193.x">http://dx.doi.org/10.1111/j.1365-2435.2006.01193.x</a></p><div class="not_ep_block"><h2>Abstract</h2><p style="padding-bottom: 16px; text-align: left; margin: 1em auto 0em auto">Summary
1. Comparisons of adult and juvenile plant stages are often confounded by other factors such as differences in height between plants. However, these factors can be teased apart using common garden experiments and appropriate sampling designs.
2. Using paired sampling of upper and lower canopies of Eucalyptus nitens trees,which were growing in a common environment trial and only one of which had undergone the transition to adult foliage, this study assessed the effects of ontogeny and canopy position on the feeding preferences of Common Brushtail Possums (Trichosurus vulpecula) in captive feeding trials under choice conditions.
3. Possums preferred juvenile foliage over adult foliage. In contrast, canopy position did not influence preferences.
4. Adult foliage contained significantly less sideroxylonals (a compound known to deter herbivory by Brushtail Possums), but was significantly tougher (with thicker cuticle, more fibre, more lignin and a higher percentage dry mass) than juvenile foliage, suggesting that leaf toughness was more significant than defensive chemistry in influencing intake by possums. Adult foliage did not differ significantly from juvenile foliage in nitrogen, total phenolics or essential oil concentration.
5. Greater resistance to herbivory of adult foliage compared with juvenile foliage by a significant browser of eucalypt tree foliage could contribute to selection for an earlier change from juvenile to adult foliage in areas that are heavily browsed by possums.</p></div><table style="margin-bottom: 1em" border="0" cellpadding="3" class="not_ep_block"><tr><th valign="top" class="ep_row">Item Type:</th><td valign="top" class="ep_row">Article</td></tr><tr><th valign="top" class="ep_row">Additional Information:</th><td valign="top" class="ep_row">The definitive version is available at www.blackwell-synergy.com</td></tr><tr><th valign="top" class="ep_row">Keywords:</th><td valign="top" class="ep_row">eucalypt, mammalian herbivory, ontogeny, phase change, plant secondary metabolites</td></tr><tr><th valign="top" class="ep_row">Subjects:</th><td valign="top" class="ep_row"><a href="http://eprints.utas.edu.au/view/subjects/270703.html">270000 Biological Sciences > 270700 Ecology and Evolution > 270703 Terrestrial Ecology</a></td></tr><tr><th valign="top" class="ep_row">Collections:</th><td valign="top" class="ep_row">UNSPECIFIED</td></tr><tr><th valign="top" class="ep_row">ID Code:</th><td valign="top" class="ep_row">1774</td></tr><tr><th valign="top" class="ep_row">Deposited By:</th><td valign="top" class="ep_row"><span class="ep_name_citation"><span class="person_name">dr gregory j jordan</span></span></td></tr><tr><th valign="top" class="ep_row">Deposited On:</th><td valign="top" class="ep_row">03 Sep 2007</td></tr><tr><th valign="top" class="ep_row">Last Modified:</th><td valign="top" class="ep_row">12 Feb 2008 12:07</td></tr><tr><th valign="top" class="ep_row">ePrint Statistics:</th><td valign="top" class="ep_row"><a target="ePrintStats" href="/es/index.php?action=show_detail_eprint;id=1774;">View statistics for this ePrint</a></td></tr></table><p align="right">Repository Staff Only: <a href="http://eprints.utas.edu.au/cgi/users/home?screen=EPrint::View&eprintid=1774">item control page</a></p>
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