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Articoli di riviste sul tema "Paleobiology South Australia Fleurieu Peninsula"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 31 gennaio 2023

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1

Casanova, Michelle T., e Kenneth G. Karol. "Monoecious Nitella species (Characeae, Charophyta) from south-eastern mainland Australia, including Nitella paludigena sp. nov." Australian Systematic Botany 21, n. 3 (2008): 201. http://dx.doi.org/10.1071/sb07026.

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Identification of Australian species of Nitella is problematic. Several species of monoecious Nitella have been described from south-eastern mainland Australia, but identification of these based on current treatments has been difficult. In response to the discovery of a new monoecious Nitella from the swamps of the Fleurieu Peninsula in South Australia, the monoecious species of Nitella from south-eastern mainland Australia were examined and compared. N. paludigena M.T.Casanova & K.G.Karol is distinguished from other monoecious species on the basis of its overall vegetative morphology and oospore morphology. N. paludigena is found in peaty tea-tree (Leptospermum sp) swamps on the Fleurieu Peninsula in South Australia, and in the south-west of Victoria. A description of the morphology and ecology of the five monoecious Nitella species from south-eastern mainland Australia is given, along with a key.

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2

Steinhardt, C. "The microstructural anatomy of a major thrust zone on Fleurieu Peninsula, South Australia". Australian Journal of Earth Sciences 38, n. 2 (maggio 1991): 139–50. http://dx.doi.org/10.1080/08120099108727962.

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3

Littlejohn, Murray J. "Geographic variation in the advertisement call of Crinia signifera (Anura:Myobatrachidae) on Kangaroo Island and across southern south-eastern Australia". Australian Journal of Zoology 56, n. 4 (2008): 223. http://dx.doi.org/10.1071/zo08018.

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The male advertisement call of anuran amphibians has a major role in mate choice, and regional variation in this attribute can act as an indicator of speciation and a marker for genetic differentiation. As part of a regional study of geographic variation in the male advertisement call of Crinia signifera across south-eastern Australia and adjacent larger continental islands, samples of advertisement calls from two populations on Kangaroo Island and two populations on the adjacent Fleurieu Peninsula were compared. Four call attributes were considered: pulse number, call duration, pulse rate and dominant frequency. Pulse number is considered the most reliable for comparative purposes because it is not influenced by effective temperature or audio recording and analysis. The two island populations (central and eastern, ~24 km apart) differ significantly in pulse number, with contact but no overlap of interquartile ranges. The eastern sample differs markedly from those on the nearby Fleurieu Peninsula – which are both similar to the more distant central island sample. Geographic variation in pulse number in these four samples and 11 others from two recent publications is then interpreted in the light of land bridges and lower temperatures of the late Pleistocene and early Holocene.

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4

Abbott, I. "Distribution of the native earthworm fauna of Australia - a continent-wide perspective". Soil Research 32, n. 1 (1994): 117. http://dx.doi.org/10.1071/sr9940117.

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Based on nearly 2000 available records, the broadscale geographical distribution of the native earthworm fauna of Australia was mapped. Native earthworms were recorded from south-eastern, eastern and northern Australia within 400 km of the coast. Isolated faunas were present in Tasmania and south-west Western Australia, and apparently isolated faunas occurred in the Adelaide area/Fleurieu Peninsula of South Australia and the ranges of central Australia. All but 30 locality records occurred where annual rainfall averaged or exceeded 400 mm; 16 of these records were instances of moisture-gaining sites (moist caves, waterholes, banks of large rivers, edge of granite domes). A collecting strategy to both fill in gaps in the distribution map and discover additional anomalous occurrences (with respect to the 400 mm isohyet) is outlined.

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5

Bickford, Sophia, Peter Gell e Gary J. Hancock. "Wetland and terrestrial vegetation change since European settlement on the Fleurieu Peninsula, South Australia". Holocene 18, n. 3 (maggio 2008): 425–36. http://dx.doi.org/10.1177/0959683607087932.

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6

Deegan, Brian M., George G. Ganf e Justin D. Brookes. "Assessment of Riverine Ecological Condition in the Fleurieu Peninsula, South Australia: Implications for Restoration". Transactions of the Royal Society of South Australia 134, n. 2 (gennaio 2010): 228–42. http://dx.doi.org/10.1080/3721426.2010.10887144.

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7

Marginson, JC, e PY Ladiges. "Geographical variation in Eucalyptus baxteri s.l. and the recognition of a new species, E. arenacea". Australian Systematic Botany 1, n. 2 (1988): 151. http://dx.doi.org/10.1071/sb9880151.

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Morphological variation in Eucalyptus baxteri (Benth.) Maiden & Blakely ex Black is described throughout its range. There are two geographical forms, the principal differences between which are seedling morphology and the time of transition from juvenile to intermediate growth phase. The forms are hereby recognised as two species. E. baxteri s.str. has adult leaves broad near the apex, warty flower buds, often large fruits, and an early transition to intermediate foliage. It occurs in South Australia on Kangaroo Island, Fleurieu Peninsula, Barossa Range and near Wandilo, and in Victoria on the Grampian Ranges, Great Dividing Range and coastal areas, E. arenacea sp. nov. has tapering adult leaves, generally more slender, non-warty flower buds with longer, narrower pedicels and peduncles. Fruits are generally smaller with the disc less raised. Seedlings typically show a later transition to the intermediate foliage. It occurs on Mt Stapylton in the Grampian Ranges and the desert sand country of north-western Victoria and south-eastern South Australia. It is parapatric with E. baxteri on Kangaroo Island and Fleurieu Peninsula, and is restricted to sand deposits. A previous cladistic analysis suggested that E. baxteri s.l. is paraphyletic, E. arenacea sp. nov. being the sister taxon to E. baxteri s.str. and E. akina (an endemic of the Grampian Ranges). A sequence of evolutionary events is hypothesised by using the cladogram, the distribution of the taxa on different soils, and the geological history of the region.

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8

Taggart, PatrickL, Rebecca Traub, Sze Fui e Phil Weinstein. "Attempt to uncover reservoirs of human spotted fever rickettsiosis on the Fleurieu Peninsula, South Australia". Journal of Vector Borne Diseases 55, n. 3 (2018): 239. http://dx.doi.org/10.4103/0972-9062.249483.

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9

Baker, Geoff, John Buckerfield, Robyn Grey-Gardner, Richard Merry e Bernard Doube. "The abundance and diversity of earthworms in pasture soils in the fleurieu peninsula, south australia". Soil Biology and Biochemistry 24, n. 12 (dicembre 1992): 1389–95. http://dx.doi.org/10.1016/0038-0717(92)90123-f.

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10

Li, You, Melanie L. Lancaster, Susan M. Carthew, Jasmin G. Packer e Steven J. B. Cooper. "Delineation of conservation units in an endangered marsupial, the southern brown bandicoot (Isoodon obesulus obesulus), in South Australia/western Victoria, Australia". Australian Journal of Zoology 62, n. 5 (2014): 345. http://dx.doi.org/10.1071/zo14038.

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Abstract (sommario):

Conservation programs for threatened species are greatly benefiting from genetic data, for their power in providing knowledge of dispersal/gene flow across fragmented landscapes and for identifying populations of high conservation value. The endangered southern brown bandicoot (Isoodon obesulus obesulus) has a disjunct distribution range in South Australia, raising the possibility that populations of the subspecies may represent distinct conservation units. In the current study, we used a combination of 14 microsatellite and two mitochondrial sequence markers to investigate the phylogeography and population structure of I. o. obesulus in South Australia and south-western Victoria, with the aim of identifying any potential evolutionarily significant units and management units relevant to conservation management. Our phylogenetic/population analyses supported the presence of two distinct evolutionary lineages of I. o. obesulus. The first lineage comprised individuals from the Mount Lofty Ranges, Fleurieu Peninsula and Kangaroo Island. A second lineage comprised individuals from the south-east of South Australia and south-western Victoria. We propose that these two lineages represent distinct evolutionarily significant units and should be managed separately for conservation purposes. The findings also raise significant issues for the national conservation status of I. o. obesulus and suggest that the current subspecies classification needs further investigation.

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11

Jago, J. B., I. A. Dyson e C. G. Gatehouse. "The nature of the sequence boundary between the Normanville and Kanmantoo Groups on Fleurieu Peninsula, South Australia". Australian Journal of Earth Sciences 41, n. 5 (ottobre 1994): 445–53. http://dx.doi.org/10.1080/08120099408728154.

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12

Bickford, Sophia, e Peter Gell. "Holocene vegetation change, Aboriginal wetland use and the impact of European settlement on the Fleurieu Peninsula, South Australia". Holocene 15, n. 2 (febbraio 2005): 200–215. http://dx.doi.org/10.1191/0959683605hl800rp.

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13

Niven, Rhiannon J., e Douglas K. Bardsley. "Planned retreat as a management response to coastal risk: a case study from the Fleurieu Peninsula, South Australia". Regional Environmental Change 13, n. 1 (29 maggio 2012): 193–209. http://dx.doi.org/10.1007/s10113-012-0315-4.

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14

Webley, L. S., I. Beveridge e G. Coulson. "Endoparasites of an insular subspecies of the western grey kangaroo, Macropus fuliginosus". Australian Journal of Zoology 52, n. 6 (2004): 623. http://dx.doi.org/10.1071/zo04011.

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This study examined parasites occurring in the insular subspecies of the western grey kangaroo, Macropus fuliginosus fuliginosus, from Kangaroo Island. A total of 25 kangaroos from three sites were examined for gastrointestinal parasites. Fifteen parasite species were identified: eight in the stomach, five in the small intestine and two in the large intestine. Parasite prevalence showed a bimodal distribution: 'satellite' species were predominantly cestodes, whereas 'core' species were nematodes. There was no evidence of co-speciation in the 12 parasite species occurring in both island and mainland western grey kangaroo subspecies. M. f. fuliginosus harboured fewer parasite species than M. f. melanops from the Fleurieu Peninsula, South Australia. This might be related to parasite prevalence and the intensity of infection in the original population of kangaroos. Alternatively, it might be related to differing environmental conditions or to chance. Host switching was evident, with Cloacina kartana, which has been recorded as a common parasite of the tammar wallaby, Macropus eugenii, also occurring in some kangaroos.

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15

van Dijk, Kor-jent, Michelle Waycott, Joe Quarmby, Doug Bickerton, Andrew H. Thornhill, Hugh Cross e Edward Biffin. "Genomic Screening Reveals That the Endangered Eucalyptus paludicola (Myrtaceae) Is a Hybrid". Diversity 12, n. 12 (10 dicembre 2020): 468. http://dx.doi.org/10.3390/d12120468.

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A hybrid origin for a conservation listed taxon will influence its status and management options. Here, we investigate the genetic origins of a nationally endangered listed taxon—Eucalyptus paludicola—a tree that is restricted to the Fleurieu Peninsula and Kangaroo Island of South Australia. Since its description in 1995, there have been suggestions that this taxon may potentially be a stable hybrid species. Using a high throughput sequencing approach, we developed a panel of polymorphic loci that were screened across E. paludicola and its putative parental species E. cosmophylla and E. ovata. Bayesian clustering of the genotype data identified separate groups comprising E. ovata and E. cosmophylla while E. paludicola individuals were admixed between these two, consistent with a hybrid origin. Hybrid class assignment tests indicate that the majority of E. paludicola individuals (~70%) are F1 hybrids with a low incidence of backcrossing. Most of the post-F1 hybrids were associated with revegetation sites suggesting they may be maladapted and rarely reach maturity under natural conditions. These data support the hypothesis that E. paludicola is a transient hybrid entity rather than a distinct hybrid species. We briefly discuss the conservation implications of our findings.

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16

Bickford, Sophia, e Brendan Mackey. "Reconstructing pre-impact vegetation cover in modified landscapes using environmental modelling, historical surveys and remnant vegetation data: a case study in the Fleurieu Peninsula, South Australia". Journal of Biogeography 31, n. 5 (14 aprile 2004): 787–805. http://dx.doi.org/10.1111/j.1365-2699.2003.01050.x.

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17

Buckley, Ralf. "The contested nature of coastal climate change—commentary to Niven and Bardsley. Planned retreat as a management response to coastal risk: a case study from the Fleurieu Peninsula, South Australia". Regional Environmental Change 13, n. 1 (22 gennaio 2013): 211–14. http://dx.doi.org/10.1007/s10113-012-0383-5.

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18

Buckley, Ralf. "Erratum to: The contested nature of coastal climate change—commentary to Niven and Bardsley. Planned retreat as a management response to coastal risk: a case study from the Fleurieu Peninsula, South Australia". Regional Environmental Change 14, n. 1 (11 dicembre 2013): 427. http://dx.doi.org/10.1007/s10113-013-0565-9.

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19

Scott, Shawn, e Richard Biffin. "Notes on a newly discovered population of the Pygmy Copperhead Austrelaps labialis (Jan, 1859) in the Adelaide Hills, South Australia". Australian Zoologist, 4 giugno 2021. http://dx.doi.org/10.7882/az.2021.013.

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ABSTRACT The Pygmy Copperhead Austrelaps labialis is South Australia’s only endemic snake, being native to the Adelaide Mount Lofty Ranges and Fleurieu Peninsula; with an additional allopatric population on Kangaroo Island. Within the AMLR, it inhabits stringybark forests and adjacent dense vegetation, occupying a total area of ~150 km2. Here, we document a newly discovered and seemingly isolated population at the north-eastern extent of its known mainland distribution. We visited Lobethal Bushland Park from 2013–2018 and observed snakes of varying age and size, while documenting their ecology and behaviour. In late 2019, the site was decimated by catastrophic wildfire and its persistence here remains unknown. Alongside descriptions of our observations, we suggest measures for the conservation of this vulnerable population in its remnant habitat if it has survived the impacts of wildfire.

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20

Holford, Simon P., Paul F. Green, Ian R. Duddy, Richard R. Hillis, Steven M. Hill e Martyn S. Stoker. "Preservation of late Paleozoic glacial rock surfaces by burial prior to Cenozoic exhumation, Fleurieu Peninsula, Southeastern Australia". Journal of the Geological Society, 21 giugno 2021, jgs2020–250. http://dx.doi.org/10.1144/jgs2020-250.

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The antiquity of the Australian landscape has long been the subject of debate, with some studies inferring extraordinary longevity (>108 myr) for some subaerial landforms dating back to the early Paleozoic. A number of early Permian glacial erosion surfaces in the Fleurieu Peninsula, southeastern Australia, provide an opportunity to test the notion of long-term subaerial emergence, and thus tectonic and geomorphic stability, of parts of the Australian continent. Here we present results of apatite fission track analysis (AFTA) applied to a suite of samples collected from localities where glacial erosion features of early Permian age are developed. Our synthesis of AFTA results with geological data reveals four cooling episodes (C1-4), which are interpreted to represent distinct stages of exhumation. These episodes occurred during the Ediacaran to Ordovician (C1), mid-Carboniferous (C2), Permian to mid-Triassic (C3) and Eocene to Oligocene (C4).The interpretation of AFTA results indicates that the Neoproterozoic−Lower Paleozoic metasedimentary rocks and granitic intrusions upon which the glacial rock surfaces generally occur were exhumed to the surface by the latest Carboniferous−earliest Permian during episodes C2 and/or C3, possibly as a far-field response to the intraplate Alice Springs Orogeny. The resulting landscapes were sculpted by glacial erosive processes. Our interpretation of AFTA results suggests that the erosion surfaces and overlying Permian sedimentary rocks were subsequently heated to between c. 60 and 80°C, which we interpret as recording burial by a sedimentary cover comprising Permian and younger strata, roughly 1 km in thickness. This interpretation is consistent with existing thermochronological datasets from this region, and also with palynological and geochronological datasets from sediments in offshore Mesozoic−Cenozoic-age basins along the southern Australian margin that indicate substantial recycling of Permian−Cretaceous sediments. We propose that the exhumation which led to the contemporary exposure of the glacial erosion features began during the Eocene to Oligocene (episode C4), during the initial stages of intraplate deformation that has shaped the Mt Lofty and Flinders Ranges in South Australia. Our findings are consistent with several recent studies, which suggest that burial and exhumation have played a key role in the preservation and contemporary re-exposure of Gondwanan geomorphic features in the Australian landscape.

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