Otago University Research Archive
Browsing Botany by Date Published
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Browsing Botany by Date Published
Now showing items 1-20 of 45
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(Thesis, Master of Science, 2013)Understanding reproductive capabilities of individual species along altitudinal gradients is increasingly important in light of changes in habitat that are predicted with climate change. Alpine plants can be considered ... -
(Thesis, Doctor of Philosophy, 2013)The objective of this thesis was to improve our understanding of the processes and mechanisms underlying the successful invasion of Thymus vulgaris L. in Central Otago, New Zealand by carrying out aboveground and belowground ...
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(Thesis, Master of Science, 2013)Alpine environments are highly variable with different selective pressures compared to lower altitude habitats. The alpine zone in New Zealand was formed in isolation and displays a range of unusual floral characteristics ...
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(Thesis, Master of Science, 2012)The purpose of this study was to re-examine the morphological characters of native New Zealand Lobelioideae, and to use those characters, in concert with existing genetic data, to help inform a global effort at constructing ... -
(Thesis, Doctor of Philosophy, 2012)This thesis investigates the potential for a sand-dune plant, Ammophila arenaria (L.) Link (marram grass, European beach grass) to disperse and establish new colonies from pieces of its rhizome system. Such dispersal ... -
(Thesis, Master of Science, 2012)Alien plants cost the New Zealand economy over $1 billon per annum in lost revenue and control measures, and can modify native plant communities to the detriment of endemic biodiversity. Hieracium lepidulum has invaded ... -
(Thesis, Doctor of Philosophy, 2012)Species interactions, whether facilitative or competitive, play key roles in structuring plant communities. Research into these associations has focused on competitive interactions, however recently, facilitation research ...
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(Thesis, Master of Science, 2012)Ocean acidification is the lowering of oceanic pH that has resulted from the increase of CO2 in the atmosphere. pH is a dominant factor driving the dissociation of inorganic carbon in the ocean and because the pH is lowering, ...
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(Thesis, Doctor of Philosophy, 2012)A major threat to biodiversity worldwide is human land-use change which increases habitat fragmentation and reduces landscape connectivity leading to species extinctions. For conservation biologists it is essential to ... -
(Thesis, Doctor of Philosophy, 2012)Invasive plants modify ecosystem structure and function, which can result in an alternative novel state - jeopardising the ecosystems ecological value. The impact of invasive plants on communities, ecosystems or landscapes ...
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(Thesis, Doctor of Philosophy, 2012)Large, isolated ‘specimen’ trees are a significant part of urban landscapes, yet their role in supporting wider biodiversity remains largely unexamined. The aims of this thesis were to examine how urban, isolated trees ...
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(Thesis, Master of Science, 2012)All light from the sun contains radiation in the ultraviolet (UV) range, wavelengths between 200 and 400 nm that may be harmful to living organisms. Exposure of plant tissues to UV-B radiation (200-400 nm) may result in ... -
(Thesis, Master of Science, 2012)Theory predicts that disturbance affects both the biotic and abiotic components of ecosystems, and the highest community diversity occurs at intermediate levels of, and time since, disturbance ('the intermediate disturbance ... -
(Thesis, Doctor of Philosophy, 2012)The leaves of Pseudowintera colorata (Winteraceae) are well known for their bright displays of red colour, and their strong peppery flavour. The variable patterns of red and green colour seen across the leaves of this ...
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(Thesis, Doctor of Philosophy, 2011)The net outcome of the interaction between woody and herbaceous plant species can be positive or negative depending on plant species and environmental conditions. Positive interactions (facilitation) are postulated to be ...
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(Thesis, Master of Science, 2011)Coastal marine systems are both ecologically and economically important worldwide, yet over the last few decades these environments have become increasingly impacted by contaminant inputs, particularly from urban runoff, ... -
(Thesis, Doctor of Philosophy, 2011)In many coastal areas increased anthropogenic influence has had a negative impact on the penetration of light through the water column, which may lead to increased periods of light limitation for subtidal macroalgae. This ...
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(Thesis, Master of Science, 2011)Introduced rodents are pest species in New Zealand, in particular Rattus rattus L. (the ship rat), and have contributed to the decline in some native forest biota. Within New Zealand native forests, there is little knowledge ...
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(Thesis, Master of Science, 2011)Snow is an essential element determining plant composition and performance in alpine environments. Snowbank communities are an ideal model community to identify plant species distribution and plant strategies along ...
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(Thesis, Master of Science, 2011)The fragmentation of contiguous old-growth forests is among the most severe consequences of deforestation. Southeast Asia has suffered disproportionately and in particular its tropical dry forests (TDFs). The aim of this ...
Now showing items 1-20 of 45