Comparative Biology of Two Forms of an Invasive Vine, Dolichandra Unguis-Cati (L.) Lohmann (Bignoniaceae): Implications for Weed Spread and Biocontrol
COMPARATIVE BIOLOGY OF TWO FORMS OF AN INVASIVE VINE, DOLICHANDRA UNGUIS-CATI (L.) LOHMANN (BIGNONIACEAE): IMPLICATIONS FOR WEED SPREAD AND BIOCONTROL JOSHUA COMRADE BURU BSc (Biological Sciences), PGDE School of Earth, Environment and Biological Sciences Science and Engineering Faculty Queensland University of Technology Brisbane, Australia A thesis submitted in fulfilment of the requirements for the degree of Doctor of Philosophy 2016 i Keywords Anatomy, Bignoniaceae, biodiversity, biological control agents, biomass accumulation, cat’s claw creeper, competitiveness, colonization, disturbance, ecological strategies, ecophysiology, efficacy, epidermis, fitness traits, fluctuating resource hypothesis, foliar nectaries, functional traits, intraspecific variation, invasive species, invasiveness, invasion ecology, leaf economic spectrum, long pod, Macfadyena unguis-cati, morphology, palisade mesophyll, performance, phenotypic integration, phenotypic plasticity, physiology, photosynthetic rate, plant-herbivore interactions, plant invasion, plant sexual reproduction, polyembryony, propagule pressure, relative growth rate, resource use efficiency, seed ecology, seed germination, short pod, SEM, SLA, successful colonizers, taxonomy, trait correlation, tubers, weed management, WoNS, woody vine. i Thesis Abstract Cat’s claw creeper, Dolichandra unguis-cati (Bignoniaceae) is a Weed of National Significance (WoNS) in Australia and a major environmental weed in Queensland and New South Wales states. Two forms of this weed (‘short pod’ and ‘long pod’) occur in Australia. Short pod is widely distributed in Australia, but long pod is only found in a few localities in southeast Queensland. There is a general lack of understanding why the two forms are not equally prevalent. Previous studies have shown significant differences in the flowering phenology and leaf morphology of the two forms. Despite these differences, the same biological control agents are used in the management strategies for the two forms.
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