Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/4939
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dc.contributor.authorClarke, Peter Jen
dc.contributor.authorKnox, Kirsten Jen
dc.date.accessioned2010-03-09T15:38:00Z
dc.date.issued2009en
dc.identifier.citationJournal of Ecology, 97(6), p. 1374-1382en
dc.identifier.issn0022-0477en
dc.identifier.issn1365-2745en
dc.identifier.urihttps://hdl.handle.net/1959.11/4939en
dc.description.abstract1. Differences in the competitive ability of plant functional groups at early life-history stages can have important consequences for community structure. In particular, trade-offs in allocation to roots by woody plant seedlings may influence competitive ability with grasses in fire-prone vegetation. 2. We followed post-fire survival of seedlings of facultative resprouter and obligate seeder (firekilled) shrubs for 3 years in adjacent communities with a grassy/graminoid ground stratum (54 plots, 20 m²) or a non-graminoid ground stratum(54 plots, 20 m²). 3. The competitive effect of a grass (Poa) on seedlings of three congeneric pairs of resprouters and obligate seeder shrubs was tested in a factorial experiment where nutrients and the grass competitor were manipulated. The effects of grass (+,-) and nutrients (+,-) on the growth response, biomass allocation and root carbohydrate storage were measured after harvest at 26 weeks and the relative neighbour effect calculated. 4. Post-fire shrub seedling survival was high with about 50% (2163 seedlings) surviving over 3 years, but this varied between habitats and functional groups. In the grassy/graminoid ground layer communities 27% of shrub seedlings survived, whereas in the habitats with a more open ground stratum 55% of seedlings survived. In grassy habitats, obligate seeder survival was lower (23% survival) than that of resprouter seedlings (35% survival). Similarly, in open habitats, obligate seeder seedling survival was lower (51%) than that of resprouter seedlings (64% survival). 5. Growth of both resprouters and obligate seeders in our manipulative experiment was strongly reduced in the presence of a grass competitor. Moreover, the addition of nutrients increased the relative difference in mass and height between those seedlings exposed to a grass competitor and those grown without a competitor. Resprouter species allocated more to roots under competition and were less affected by grass competition than obligate seeders. 6. Synthesis. The results of seedling survival and of the experiment on the effects of grass competition on woody plant seedlings suggest that early life-history trade-offs in allocation influence seedling survival. Allocation to resprouting appears to enhance the ability of shrub seedlings to survive grass competition. We propose that grass competition across productivity gradients plays an important role in influencing landscape-level distribution patterns of woody resprouters.en
dc.languageenen
dc.publisherWiley-Blackwell Publishing Ltden
dc.relation.ispartofJournal of Ecologyen
dc.titleTrade-offs in resource allocation that favour resprouting affect the competitive ability of woody seedlings in grassy communitiesen
dc.typeJournal Articleen
dc.identifier.doi10.1111/j.1365-2745.2009.01556.xen
dc.subject.keywordsLandscape Ecologyen
dc.subject.keywordsTerrestrial Ecologyen
local.contributor.firstnamePeter Jen
local.contributor.firstnameKirsten Jen
local.subject.for2008060208 Terrestrial Ecologyen
local.subject.for2008050104 Landscape Ecologyen
local.subject.seo2008960805 Flora, Fauna and Biodiversity at Regional or Larger Scalesen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.emailpclarke1@une.edu.auen
local.profile.emailkknox2@une.edu.auen
local.output.categoryC1en
local.record.placeauen
local.record.institutionUniversity of New Englanden
local.identifier.epublicationsrecordune-20100222-123754en
local.publisher.placeOxford, United Kingdomen
local.format.startpage1374en
local.format.endpage1382en
local.peerreviewedYesen
local.identifier.volume97en
local.identifier.issue6en
local.contributor.lastnameClarkeen
local.contributor.lastnameKnoxen
dc.identifier.staffune-id:pclarke1en
dc.identifier.staffune-id:kknox2en
local.profile.roleauthoren
local.profile.roleauthoren
local.identifier.unepublicationidune:5055en
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
local.title.maintitleTrade-offs in resource allocation that favour resprouting affect the competitive ability of woody seedlings in grassy communitiesen
local.output.categorydescriptionC1 Refereed Article in a Scholarly Journalen
local.description.statisticsepubsVisitors: 129<br />Views: 129<br />Downloads: 0en
local.search.authorClarke, Peter Jen
local.search.authorKnox, Kirsten Jen
local.uneassociationUnknownen
local.year.published2009en
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