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Letteratura scientifica selezionata sul tema "Paleoecology Australia"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 31 gennaio 2023

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Articoli di riviste sul tema "Paleoecology Australia"

1

Webb, Robert H. "Spatial and Temporal Distribution of Radiocarbon Ages on Rodent Middens from the Southwestern United States". Radiocarbon 28, n. 1 (1986): 1–8. http://dx.doi.org/10.1017/s0033822200059981.

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The analysis of rodent middens, principally deposited by packrats (Neotoma sp), has rapidly become the most important paleoecologic and paleoclimatologic tool in the southwestern United States. The recent discovery of rodent middens created by stick-nest rats (Leporillus sp) and rock wallabies (Petrogale sp) in Australia (Green et al, 1983; P S Martin, oral commun, 1984) and by dassie rats (Petromus typicus) in South Africa (L Scott, oral commun, 1984) portends the use of midden analysis in arid regions worldwide. Several recent reviews of southwestern paleoecology (eg, Spaulding et al, 1983) rely heavily on rodent middens for ecologic and climatic reconstructions.

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2

Robinson, Jeffrey H. "Fossil craniid brachiopods (Craniata) of Australia and New Zealand". Proceedings of the Royal Society of Victoria 129, n. 2 (2017): 7. http://dx.doi.org/10.1071/rs17005.

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Three fossil craniid species from Australia are synonymised. Two species are transferred to two different genera, one to Danocrania and one to Novocrania; these species are described, figured and their geographic ranges illustrated. Five fossil craniid species from New Zealand, four of Novocrania and one of Valdiviathyris, are described, figured and their geographic ranges illustrated. The species described range in age from middle Paleocene to Recent. The paleoecology is summarised.

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3

Łukowiak, Magdalena. "Fossil and modern sponge fauna of southern Australia and adjacent regions compared: interpretation, evolutionary and biogeographic significance of the late Eocene ‘soft’ sponges". Contributions to Zoology 85, n. 1 (12 gennaio 2016): 13–35. http://dx.doi.org/10.1163/18759866-08501002.

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The late Eocene ‘soft’ sponge fauna of southern Australia is reconstructed based on disassociated spicules and is used to interpret the paleoecology and environmental context of shallow marine communities in this region. The reconstructed sponge association was compared with coeval sponge assemblages from the Oamaru Diatomite, New Zealand, and with the modern ‘soft’ sponge fauna of southern coastal of Australia. Based on the predominance of shallow- and moderately shallow-water species, the late Eocene assemblage is interpreted to have inhabited waters depths of about 100 m. This contrast with the spicule assemblage from New Zealand, which characterized deeper waters based on the presence of numerous strictly deepwater sponge taxa, and the absence of spicules of shallow-water demosponges represented in the Australian material. The southern Australian Eocene sponge assemblages have clear Tethyan affinities evidenced by the occurrence of sponges known today from diverse regions. This distribution suggests much wider geographical ranges of some sponge taxa during the Eocene. Their present distributions may be relictual. The modern sponge fauna inhabiting southern Australian waters shows only moderate differences from these of the late Eocene. Differences are more pronounced at lower taxonomic levels (family and genus).

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4

Crasquin-Soleau, Sylvie, e Françoise Depêche. "Paleoecology of ODP LEG 122 Triassic Ostracodes (Wombat Plateau, NW Australia)". Geobios 26, n. 3 (gennaio 1993): 331–44. http://dx.doi.org/10.1016/s0016-6995(93)80025-m.

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5

SURPRENANT, RACHEL L., JAMES G. GEHLING e MARY L. DROSER. "BIOLOGICAL AND ECOLOGICAL INSIGHTS FROM THE PRESERVATIONAL VARIABILITY OF FUNISIA DOROTHEA, EDIACARA MEMBER, SOUTH AUSTRALIA". PALAIOS 35, n. 9 (1 settembre 2020): 359–76. http://dx.doi.org/10.2110/palo.2020.014.

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ABSTRACT The Ediacara Biota represents a turning point in the evolution of life on Earth, signifying the transition from single celled organisms to complex, community-forming macrobiota. The exceptional fossil record of the soft-bodied Ediacara Biota provides critical insight into the nature of this transition and into ecosystem dynamics leading up to the so-called “Cambrian Explosion”. However, the preservation of non-biomineralizing organisms in a diversity of lithologies goes hand-in-hand with considerable taphonomic complexity that often shrouds true paleoecological and paleobiological signatures. We address the nature of this taphonomic complexity within the fossiliferous sandstones of the Ediacara Member in South Australia. Utilizing the most fossiliferous outcropping of the Ediacara Member, located at the Nilpena Station National Heritage Ediacara Fossil Site, we conduct a focused, taxon-level biostratinomic characterization of the tubular organism Funisia dorothea. Funisia is the most abundant body fossil in the Ediacara Member, making the characterization of its preservational variability essential to the accurate interpretation of regional paleobiology and paleoecology. We describe remarkable biostratinomic complexity in all Funisia populations at Nilpena, identifying four distinct preservational variants of internal and external molds and four additional successive biostratinomic grades corresponding to loss of external characters. Synthesis of these observations identify the most robust preservational forms of Funisia for use in paleobiological interpretation and highlight the important impact that Funisia's high abundance had on regional paleoecology and on population-scale preservation in the Ediacara Member.

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6

de Freitas, T. A., F. Brunton e T. Bernecker. "Silurian Megalodont Bivalves of the Canadian Arctic and Australia: Paleoecology and Evolutionary Significance". PALAIOS 8, n. 5 (ottobre 1993): 450. http://dx.doi.org/10.2307/3515019.

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7

Solon, Christine M., Mary L. Droser, James G. Gehling e Mary E. Dzaugis. "Paleoecology of Rugoconites and Tribrachidium: New Data from the Ediacaran of South Australia". Paleontological Society Special Publications 13 (2014): 46–47. http://dx.doi.org/10.1017/s2475262200010984.

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8

Hall, Christine M. S., Mary L. Droser, James G. Gehling e Mary E. Dzaugis. "Paleoecology of the enigmatic Tribrachidium: New data from the Ediacaran of South Australia". Precambrian Research 269 (ottobre 2015): 183–94. http://dx.doi.org/10.1016/j.precamres.2015.08.009.

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9

Manda, Štěpán, e Vojtěch Turek. "Silurian tarphyceridDiscoceras(Cephalopoda, Nautiloidea): systematics, embryonic development and paleoecology". Journal of Paleontology 92, n. 3 (27 marzo 2018): 412–31. http://dx.doi.org/10.1017/jpa.2017.122.

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AbstractTarphycerids were diverse and abundant in Ordovician marine faunas. Beginning at the Late Ordovician extinction, the diversity of tarphycerids declined throughout the Silurian, until their extinction in the latest Silurian. Two genera survived the Late Ordovician extinction:TrocholitesConrad, 1838 (from whichOphiocerasBarrande, 1865 probably diverged) andDiscocerasBarrande, 1867 (=GraftonocerasFoerste, 1925).Discoceras graftonense(Meek and Worthen, 1870), so far known from the US, China, and Australia, is recorded from the Silurian of Bohemia and Gotland.Discoceras stridsbergin. sp.,D.lindstroemin. sp., andD. sp. indet. from the Wenlock of Gotland andD.amissus(Barrande, 1865) from the Llandovery of Bohemia are all endemic species probably derived fromD.graftonense. The distribution ofD.graftonenseand the origin of four species ofDiscocerasin the latest Sheinwoodian and early Homerian represent the last diversification and dispersion of the Tarphycerida. No tarphycerid species originated after the mid-Homerian extinction (Mulde and Lundgreni events). SilurianDiscocerasretained the morphology and habitats of their Ordovician ancestors. The hatching time and autecology of juveniles has remained unclear. Evidence from the material studied suggests that juveniles were planktonic in habit, possessing a minute curved shell with few phragmocone chambers.Discoceras lindstroemin. sp. is exceptional owing to its heteromorphic planispiral shell with coiling that changed during ontogeny, resulting in a changing aperture orientation and decreased maneuverability.

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10

James, Noel P., e Yvonne Bone. "Paleoecology of Cool-Water, Subtidal Cycles in Mid-Cenozoic Limestones, Eucla Platform, Southern Australia". PALAIOS 9, n. 5 (ottobre 1994): 457. http://dx.doi.org/10.2307/3515136.

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Più fonti

Tesi sul tema "Paleoecology Australia"

1

Reeves, Jessica Marie. "The use of ostracoda in the palaeoenvironmental reconstruction of the Gulf of Carpentaria, Australia, from the last interglacial to present". Access electronically, 2004. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20050111.153534/index.html.

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2

Stephens, Nathaniel Patrick. "Late Devonian stratigraphy, stable isotopic analyses, and paleoecology in the Napier, Oscar, and Emanuel ranges, Canning Basin, Western Australia /". For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2002. http://uclibs.org/PID/11984.

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3

Black, Manu School of Biological Earth &amp Environmental Sciences UNSW. "A late quaternary palaeoenvironmental investigation of the fire, climate, human and vegetation nexus from the Sydney basin, Australia". Awarded by:University of New South Wales. School of Biological, Earth and Environmental Sciences, 2006. http://handle.unsw.edu.au/1959.4/25745.

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It is widely believed that Australian Aboriginals utilised fire to manage various landscapes however to what extent this impacted on Australia???s ecosystems remains uncertain. The late Pleistocene/Holocene fire history from three sites within the Sydney Basin, Gooches Swamp, Lake Baraba and Kings Waterhole, were compared with archaeological and palaeoclimatic data using a novel method of quantifying macroscopic charcoal, which is presented in this study. The palynology and other palaeoecological proxies were also investigated at the three sites. The Gooches Swamp fire record appeared to be most influenced by climate and there was an abrupt increase in fire activity from the mid-Holocene perhaps associated with the onset of modern El Ni??o dominated conditions. The Kings Waterhole site also displayed an abrupt increase in charcoal at this time however there was a marked decrease in charcoal from ~3 ka. Lake Baraba similarly had displayed low levels of charcoal in the late Holocene. At both Kings Waterhole and Lake Baraba archaeological evidence suggests intensified human activity in the late Holocene during this period of lower and less variable charcoal. It is hence likely that at these sites Aboriginal people controlled fire activity in the late Holocene perhaps in response to the increased risk of large intense fires under an ENSO-dominated climate. The fire history of the Sydney Basin varies temporally and spatially and therefore it is not possible to make generalisations about pre-historic fire regimes. It is also not possible to use ideas about Aboriginal fire regimes or pre-historic activity as a management objective. The study demonstrates that increased fire activity is related to climatic variation and this is likely to be of significance under various enhanced Greenhouse scenarios. There were no major changes in the composition of the flora at all sites throughout late Pleistocene/Holocene although there were some changes in the relative abundance of different taxa. It is suggested that the Sydney Sandstone flora, which surrounds the sites, is relatively resistant to environmental changes. Casuarinaceae was present at Lake Baraba during the Last Glacial Maximum and therefore the site may have acted as a potential refugium for more mesic communities. There was a notable decline in Casuarinaceae during the Holocene at Lake Baraba and Kings Waterhole, a trend that has been found at a number of sites from southeastern Australia.

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4

De, Deckker P. "Australian Quaternary studies : a compilation of papers and documents submitted for the degree of Doctor of Science in the Faculty of Science, University of Adelaide /". Title page, contents and abstract only, 2002. http://web4.library.adelaide.edu.au/theses/09SD/09sdd299.pdf.

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5

Johnston, Paul A. "Morphology, relationships and palaeoecology of lower Devonian bivalves from Southeastern Australia". Phd thesis, 1985. http://hdl.handle.net/1885/140930.

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Frawley, Susan Coleen. "Charcoal from Carpenter's Gap 1 : implications for environmental change in the last 42,000 years". Master's thesis, 2009. http://hdl.handle.net/1885/150532.

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7

Keaney, Benedict. "An exploration of the Bogong moth, Agrotis infusa, as a palaeo-environmental and ecosystem measure in montane areas of the Australian Capital Territory and adjacent areas of New South Wales". Master's thesis, 2006. http://hdl.handle.net/1885/147108.

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Marianelli, Pyramo C. "Palaeoenvironmental proxies from Southern Australian speleothems". Phd thesis, 2000. http://hdl.handle.net/1885/149912.

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9

De, Deckker P. (Patrick). "Australian Quaternary studies : a compilation of papers and documents submitted for the degree of Doctor of Science in the Faculty of Science, University of Adelaide". 2002. http://web4.library.adelaide.edu.au/theses/09SD/09sdd299.pdf.

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"April 2002" Includes bibliographical references and list of the publications and papers submitted. Pt. 1: section 1. Ostracod taxonomy and ecology -- section 2. Limnology of salt lakes -- section 3. Ostracod palaoecology - Quaternary environments -- section 4. Palaolimnology - Quaternary paleoenvironments and geology -- pt. 2: section 5. Geochemistry of ostracod shells -- section 6. Palaeoceanography Contains the majority of the author's scientific publications. Aims at reconstructing Quaternary paleoenvironments, mostly from the Australian region, using the fossil remains of organisms as well as new geochemical techniques.

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McHenry, Colin Richard. "Devourer of Gods: the palaeoecology of the Cretaceous pliosaur Kronosaurus queenslandicus". Thesis, 2009. http://hdl.handle.net/1959.13/935911.

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Research Doctorate - Doctor of Philosophy (PhD)
The large pliosaur Kronosaurus queenslandicus is known from numerous specimens from the Early Cretaceous marine sediments of the Australian Great Artesian Basin. The preservation of these specimens in nodular limestone generally lacks pronounced taphonomic distortion, allowing the three-dimensional shape of the osteology, in particular the skull, to be inferred with confidence. Three-dimensional geometry is critical data for the functional analyses that can form the basis for reconstruction of palaeoecology, in particular, approaches based in computational biomechanics that make use of high resolution Finite Element Modelling. These techniques have been used successfully to infer diet and feeding behaviour in various species of extinct carnivore, and are here applied to a species of large pliosaur for the first time. The cranial anatomy of Kronosaurus queenslandicus is here summarised for the first time, and outstanding questions concerning the taxonomy of the relevant material are addressed as fully as possible given available data. Overall body proportions and size are estimated in the context of other known material from specimens of large pliosaurs. The material examined supports the hypothesis that there is one species of large pliosaur in the Late Albian the Great Artesian Basin, and this material is referred to Kronosaurus queenslandicus Longman 1924. Material from the Late Aptian of the Great Artesian Basin is also Kronosaurus, and is presently referred to Kronosaurus queenslandicus Longman 1924: however questions about the anatomy of Kronosaurus boyacensis Hampe 1992 mean that further examination of material to hand, or recovery of new specimens from the Late Aptian, may require the taxonomic status of the Late Aptian material to be reviewed. Kronosaurus is a member of the Brachaucheniidae Williston 1925. Maximum size is 10.5 metres total length and approximately ~11,000 kg body mass. Biomechanical analysis of the skull of Kronosaurus shows that it had a high bite force, comparable to that predicted for a hypothetical similar sized saltwater crocodile Crocodylus porosus. The magnitude of its maximum bite force, around 30,000 Newtons, was likely exceeded by Tyrannosaurus rex and Carcharocles megalodon. Finite element modelling of the skull, compared with the skull of a 3.1 metre Crocodylus porosus, suggests that the skull of Kronosaurus carried more strain under loads simulating feeding on large prey. Accordingly, maximum prey size, relative to predator body size, is interpreted as lower in Kronosaurus than for a 3.1 metre C. porosus, although the magnitude of this limit is unknown due to incomplete data on the feeding ecology of C. porosus. Other evidence, from functional morphology, taphonomy, and comparison with extant aquatic carnivores suggests that Kronosaurus was the apex predator of the Australian Early Cretaceous inland seas. Relatively small prey were likely to be an important component of the diet of Kronosaurus, although certain morphological features of the skull appear to have permitted predation upon larger prey when available. Several of these morphological features may constitute evolutionary adaptations to the conflicting mechanical demands of feeding on small and large prey.

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Libri sul tema "Paleoecology Australia"

1

Veth, Peter Marius. Islands in the interior: The dynamics of prehistoric adaptations within the Arid Zone of Australia. Ann Arbor, Mich: International Monographs in Prehistory, 1993.

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2

Rock of ages: South Molle Island quarry, Whitsunday Islands : use and distribution of stone through space and time. Oxford: Archaeopress, 2011.

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3

Palaeo-environmental change and the persistence of human occupation in south-western Australian forests. Oxford, England: Archaeopress, 2004.

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4

Pasveer, Juliette Maria. The djief hunters: 26,000 years of rainforest exploitation on the Bird's Head of Papua, Indonesia. Leiden: Balkema, 2004.

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5

Bridging Wallace's Line: The Environmental and Cultural History and Dynamics of the Se-Asian-Australian Region (Advances in Geoecology). Catena, 2002.

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Atti di convegni sul tema "Paleoecology Australia"

1

Ruiz, Roman, Quinlan Byrne, Christopher Junium e Phoebe Cohen. "USING SINGLE-FOSSIL ORGANIC CARBON ISOTOPES TO ILLUSTRATE THE PALEOECOLOGY AND DEPOSITIONAL CONDITIONS OF THE MESOPROTEROZOIC VELKERRI FORMATION OF AUSTRALIA". In GSA Connects 2021 in Portland, Oregon. Geological Society of America, 2021. http://dx.doi.org/10.1130/abs/2021am-369877.

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