Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 13 of 13 for “"Die-back"”.
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Pantoea and Xanthomonas species associated with blight and die-back of Eucalyptus
… However, as has been seen in various studies including this one, the identification of these pathogens is not always straightforward and often time consuming. In this study the use of polyphasic identification approach was used which employs a combination of phenotypic and genotypic …
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Die-back of cold tolerant Eucalyptus associated with Phytophthora spp.in South Africa
Thesis (PhD)--University of Pretoria, 2010.
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Fungi associated with the die-back of Pterocarpus angolensis (kiaat) in South Africa
… Fusarium oxysporum. Reports of this disease date back to the late 1950s and appear localized in the Livingstone distinct, between Livingstone in Zambia and Bulawayo in Zimbabwe. Recent studies indicate that mukwa disease has begun to subside. There are more recent reports, however, of P. …
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Sediment geochemistry - a case study approach.
… 5 investigated the interactions between the die-back of the cord grass Spartina anglica in Poole Harbour and the metal contamination in the sediments. Despite having several evolutionary advantages over other plants in this environment, S. anglica is dying back in the estuary since 1925 and …
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Use of Lignite Fly Ash as a Soil Amendment
… in fly ash amended soils were exhibiting needle die-back at the end of the six-month growing period. Soil analyses revealed the effects of fly ash amendments to include: 1) elevated pH, 2) excessive free salts, particularly calcium, and extremely high levels of percent base saturation, 3) reduced …
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The effect of the growth retardant Paclobutrazol on the in vitro growth and development of Betula and Populus species
… cultures of Populus and Betula species was studied, with a view to translating the effect into the field, and ultimately to control undesired tree growth commercially. Plant growth and associated regulatory effects were studied under controlled conditions over an eight to twelve week culture …
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Transcriptional responses of Eucalyptus clones to the gall wasp, Leptocybe invasa
… a wide range of symptoms such as stunted growth, die-back and death. In their native environment, populations of L. invasa are maintained to almost below observational level; however, once removed from this environment, the pest causes extensive damage in young, susceptible trees. Pesticides are …
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Molecular Expression of Neuroprotective and Neurodestructive Signaling Systems Following Axotomy-Induced Target Disconnection: Relevance to ALS
… junctions in the lower limbs and therefore the die-back theory of ALS, suggests disconnection from the target musculature leads to MN degeneration. Our lab utilizes a peripheral nerve injury model to investigate the mechanisms of MN survival in the pre-symptomatic SOD1 mouse. We have shown SOD1 …
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Trading water for carbon in a changing climate: can optimality theory improve the predictability of land surface models?
… and heatwaves could drive future mass forest die-back. However, assessing future risk remains a challenge because climate models demonstrate systematic errors in predicting plant function when resources become limiting (e.g., water). To improve predictions of ecosystem resilience, major model …
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Mediterranean forest resilience to drought and climate change
… of species’ tolerances derived from local studies limited in time and space. Remote sensing provides opportunities to study resilience over larger scales, but the tools needed to quantify the resilience of forests to drought and evaluate the effectiveness of management plans remain limited. …
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Infaunal Abundance and Diversity in Vegetated and Unvegetated Areas of a Georgia Salt Marsh
… that marsh infauna play an important role in the diets of these species. The distribution and abundance of some of these infauna has been shown to be influenced by vegetative cover. In 2001, salt marshes along the coast of Georgia began to die, resulting in the loss of the dominant vegetation. …
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Ecology of box mistletoe Amyema miquelii dispersal in pink gum Eucalyptus fasciculosa woodlands.
… The results support the notion that woodland dieback may improve conditions for mistletoe dispersal by allowing favourable habitat for Mistletoebirds, by increasing canopy access and by providing more perch sites. Dieback will also reduce mistletoe establishment, however, through a loss of …
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Climate change in experimental ecology - The impact of warming and drought on key European tree, heath, and grassland species
… plant resistance and thus lead to less tissue die-back compared to plants with hardly any drought experience in the face of a very severe drought. Additionally, plant community composition might have an influence on the ecological stress memory of single plant species. To sum up, the findings …