Дисертації з теми "Fire ecology Australia"
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Shrestha, Hari Ram. "Post-fire recovery of carbon and nitrogen in sub-alpine soils of South-eastern Australia /." Connect to thesis, 2009. http://repository.unimelb.edu.au/10187/6963.
Повний текст джерелаThis study investigated post-fire recovery of soil C and N in four structurally different sub-alpine plant communities (grassland, heathland, Snowgum and Alpine ash) of south-eastern Australia which were extensively burnt by landscape-scale fires in 2003. The amount and isotopic concentration of C and N in soils to a depth of 20 cm from Alpine ash forest were assessed five years after fire in 2008 and results were integrated with measurements taken immediately prior to burning (2002) and annually afterwards.
Because the historical data set, comprised of three soil samplings over the years 2002 to 2005, consisted of soil total C and N values which were determined as an adjunct to 13C and 15N isotopic studies, it was necessary to establish the accuracy of these IRMS-derived measurements prior to further analysis of the dataset. Two well-established and robust methods for determining soil C (total C by LECO and oxidizable C by the Walkley-Black method) were compared with the IRMS total C measurement in a one-off sampling to establish equivalence prior to assembling a time-course change in soil C from immediately pre-fire to five years post-fire. The LECO and IRMS dry combustion measurements were essentially the same (r2 >0.99), while soil oxidizable C recovery by the Walkley-Black method (wet digestion) was 68% compared to the LECO/IRMS measurements of total C. Thus the total C measurement derived from the much smaller sample size (approximately 15 mg) combusted during IRMS are equivalent to LECO measurement which require about 150 mg of sample.
Both total C and N in the soil of Alpine ash forests were significantly higher than soils from Snowgum, heathland and grassland communities. The ratio of soil NH4+ to NO3- concentration was greater for Alpine ash forest and Snow gum woodland but both N-fractions were similar for heathland and grassland soils. The abundance of soil 15N and 13C was significantly depleted in Alpine ash but both isotopes were enriched in the heathland compared to the other ecosystems. Abundance of both 15N and 13C increased with soil depth.
The natural abundance of 15N and 13C in the foliage of a subset of non-N2 fixing and N2 fixing plants was measured as a guide to estimate BNF inputs. Foliage N concentration was significantly greater in N2 fixers than non-N2 fixers while C content and 13C abundance were similar in both functional groups. Abundance of 15N was depleted in the N2 fixing species but was not significantly different from the non-N2 fixers to confidently calculate BNF inputs based on the 15N abundance in the leaves.
The total C pool in soil (to 20 cm depth) had not yet returned to the pre-fire levels in 2008 and it was estimated that such levels of C would be reached in another 6-7 years (about 12 years after the fire). The C and N of soil organic matter were significantly enriched in 15N and 13C isotopes after fire and had not returned to the pre-fire levels five years after the fire. It is concluded that the soil organic N pool can recover faster than the total C pool after the fire in the Alpine ash forests.
Everaardt, Annika. "The impact of fire on the honey possum Tarsipes rostratus in the Fitzgerald River National Park, Western Australia." Thesis, Everaardt, Annika (2003) The impact of fire on the honey possum Tarsipes rostratus in the Fitzgerald River National Park, Western Australia. PhD thesis, Murdoch University, 2003. https://researchrepository.murdoch.edu.au/id/eprint/66/.
Повний текст джерелаEveraardt, Annika. "The impact of fire on the honey possum Tarsipes rostratus in the Fitzgerald River National Park, Western Australia." Everaardt, Annika (2003) The impact of fire on the honey possum Tarsipes rostratus in the Fitzgerald River National Park, Western Australia. PhD thesis, Murdoch University, 2003. http://researchrepository.murdoch.edu.au/66/.
Повний текст джерелаFisher, Judith L. "Fundamental changes to ecosystem properties and processes linked to plant invasion and fire frequency in a biodiverse woodland." University of Western Australia. School of Plant Biology, 2008. http://theses.library.uwa.edu.au/adt-WU2008.0109.
Повний текст джерелаWard, David Jefford. "People, fire, forest and water in Wungong: the landscape ecology of a West Australian water catchment." Thesis, Curtin University, 2010. http://hdl.handle.net/20.500.11937/2006.
Повний текст джерелаNielsen, Zigourney. "Within-fire patchiness associated with prescribed burning in the northern Jarrah forests of Western Australia." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2018. https://ro.ecu.edu.au/theses/2070.
Повний текст джерелаDoherty, Tim S. "Ecology of feral cats Felis catus and their prey in relation to shrubland fire regimes." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2015. https://ro.ecu.edu.au/theses/1678.
Повний текст джерелаCargill, Jeffrey. "Fate of Eucalyptus marginata seed from canopy-store to emergence in the northern jarrah forests of Western Australia: Research to help improve regeneration following shelterwood treatment." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2014. https://ro.ecu.edu.au/theses/1415.
Повний текст джерелаLalor, Briony Maree. "An assessment of the recovery of the microbial community in jarrah forest soils after bauxite mining and prescription burning." University of Western Australia. School of Earth and Geographical Sciences, 2009. http://theses.library.uwa.edu.au/adt-WU2010.0037.
Повний текст джерелаWilliams, Patrick. "Range retraction and the habitat selection of the western Partridge Pigeon (Geophaps smithii blaauwi) in the north-western Kimberley region, Western Australia." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2022. https://ro.ecu.edu.au/theses/2613.
Повний текст джерелаSanders, Shareen. "Increased Drought and Fire Intensity Regimes Reduce the Ecological Resilience of Mediterranean Forests in the South-West Australian Floristic Region." Thesis, Uppsala universitet, Institutionen för biologisk grundutbildning, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-419206.
Повний текст джерелаJaud, Thomas. "Comportement alimentaire des éléphants de mer dans un océan à très fine échelle." Thesis, Brest, 2015. http://www.theses.fr/2015BRES0064/document.
Повний текст джерелаOcean dynamics, especially in the southern ocean, are caracterized by strong fluctuation due to mesoscale (eddies, 100-200km) and submesoscale (filaments, <50km) processes. Theses processes are known to strongly stimulate primary production and with him the rest of the trophic chain. However, in marine ecosystems, relationship between prey and predator distribution remain challenging to understand. Such complexe link exist within the Southern Elephant Seal (SES) and their deep diving prey.This PhD worked to understand how the SES diving and foraging behaviour is impacted by submesoscale variation of the environment. Two original aspects of this work was first to use the very high resolution measurement from SES as an unique 3-D in-situ submesoscale dataset and then to combine it to, more classic, satellite temperature and altimetry measurement. This work showed, for the first time the in-situ impact of submesoscale frontal regions on one top predator foraging behaviour. Furthermore, during this study, an original method to identify fine scale frontal regions was developped. Finally, this PhD confirm the relevant use of the Surface Quasi-Geostrophic method in the study of fine scale dynamics, especially in the possibility of high resolution spatial missions (such as SWOT)
Smith, Annabel L. "Reptile dispersal and demography after fire : process-based knowledge to assist fire management for biodiversity." Phd thesis, 2012. http://hdl.handle.net/1885/149596.
Повний текст джерелаWilliams, Paul Richard. "The effect of fire regime on tropical savannahs of north-eastern Australia : interpreting floristic patterns through critical life events /." 2002. http://eprints.jcu.edu.au/205.
Повний текст джерелаFraser, Fiona Jayne. "The impacts of fire and grazing on the partridge pigeon : the ecological requirements of a declining tropical granivore." Phd thesis, 2000. http://hdl.handle.net/1885/147921.
Повний текст джерелаLeavesley, Adam. "The response of birds to the fire regimes of mulga woodlands in central Australia." Phd thesis, 2008. http://hdl.handle.net/1885/151592.
Повний текст джерелаVivian, Lyndsey Marie. "Variation in fire response traits of plants in mountainous plant communities of south-eastern Australia." Phd thesis, 2010. http://hdl.handle.net/1885/151436.
Повний текст джерелаWestgate, Martin Joseph. "Quantifying the effects of fire on frogs in Booderee National Park." Phd thesis, 2013. http://hdl.handle.net/1885/149740.
Повний текст джерелаBastias, Brigitte A., University of Western Sydney, College of Health and Science, and Centre for Plant and Food Science. "The influence of repeated prescribed burning and forest conversion on soil fungal communities." 2007. http://handle.uws.edu.au:8081/1959.7/21101.
Повний текст джерелаDoctor of Philosophy (PhD)
Melland, Rachel L. "Management of boneseed (Chrysanthemoides monilifera ssp. monilifera) (L.) T. Norl. using fire, herbicides and other techniques in Australian woodlands." 2009. http://hdl.handle.net/2440/58443.
Повний текст джерелаhttp://proxy.library.adelaide.edu.au/login?url= http://library.adelaide.edu.au/cgi-bin/Pwebrecon.cgi?BBID=1457770
Thesis (Ph.D.) - University of Adelaide, School of Agriculture, Food and Wine, 2009
Pinner, Luke. "The relative influence of weather, vegetation and terrain on the severity of the 2003 fires in Kosciusko National Park." Master's thesis, 2008. http://hdl.handle.net/1885/150946.
Повний текст джерелаKing, Karen Jane. "Simulating the effects of anthropogenic burning on patterns of biodiversity." Phd thesis, 2004. http://hdl.handle.net/1885/150934.
Повний текст джерелаPickering, Catherine Marina. "Reproductive ecology of five species of Australian alpine ranunculus." Phd thesis, 1993. http://hdl.handle.net/1885/140186.
Повний текст джерелаSanecki, Glenn M. "The distribution and behaviour of small mammals in relation to natural and modified snow in the Australian Alps." Phd thesis, 2005. http://hdl.handle.net/1885/12625.
Повний текст джерелаCary, Geoffrey John. "Predicting fire regimes and their ecological effects in spatially complex landscapes." Phd thesis, 1998. http://hdl.handle.net/1885/9265.
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