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Zeitschriftenartikel zum Thema "Marine ecology South Australia Christies Beach":
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Fryar, Sally C., Kevin D. Hyde und David E. A. Catcheside. „A survey of marine fungi on wood in South Australia“. Botanica Marina 63, Nr. 5 (25.10.2020): 469–78. http://dx.doi.org/10.1515/bot-2020-0005.
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AbstractA survey of driftwood and mangrove wood in South Australia revealed a high diversity of marine fungi. Across eight sites there were 43 species of marine fungi, of which 42 are new records for South Australia, 11 new records for Australia and 12 taxa currently of uncertain status likely to be new species. Sites had distinctive species compositions with the largest difference attributable to substrate type (beach driftwood vs. mangrove wood). However, even between mangrove sites, species assemblages were distinctly different with only the more common species occurring at all mangrove sites. More intensive surveys across a broader range of habitats and geographic locations should reveal significantly more species.
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Colgan, D. J. „Marine and estuarine phylogeography of the coasts of south-eastern Australia“. Marine and Freshwater Research 67, Nr. 11 (2016): 1597. http://dx.doi.org/10.1071/mf15106.
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Understanding a region’s phylogeography is essential for an evolutionary perspective on its biological conservation. This review examines the phylogeographic structures in south-eastern Australia that have been revealed by mitochondrial DNA sequencing and other genetic techniques and examines whether they can be explained by known factors. The review covers species that occur in the intertidal zone or, even infrequently, in the shallow subtidal zone. The coasts most frequently associated with phylogeographic structure are the boundaries between the Peronian and Maugean biogeographical provinces in southern New South Wales and the Maugean and Flindersian provinces in South Australia, the areas in Victoria and north-eastern Tasmania separated by the Bassian Isthmus at glacial maxima, long sandy stretches without rocky intertidal habitat on the Ninety Mile Beach in Victoria and the Younghusband Peninsula–Coorong in South Australia, southern Tasmania and Bass Strait, which acts as a barrier for littoral species.
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Sherwood, John E., Ian J. McNiven und Laurie Laurenson. „The Moyjil site, south-west Victoria, Australia: shells as evidence of the deposit’s origin“. Proceedings of the Royal Society of Victoria 130, Nr. 2 (2018): 50. http://dx.doi.org/10.1071/rs18006.
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Characteristics of marine shellfish and other species found in a Last Interglacial (LIG) shell deposit at Point Ritchie (Moyjil) at Warrnambool in south-western Victoria have been compared to those from modern and LIG natural beach deposits, Holocene Aboriginal middens and modern Pacific Gull (Larus pacificus) middens. The research was aimed at determining whether properties such as shell speciation, size or taphonomy could identify the mechanism responsible for formation of the Moyjil deposit. Marine species found in the Moyjil deposit resemble those found in both Aboriginal and Pacific Gull middens and are non-discriminatory for the two types. Taphonomic properties such as wear and breakage pattern of opercula of the dominant species, Lunella undulata (syn. Turbo undulatus), are non-diagnostic because of post-depositional erosion and transport effects in the available specimens. The size of L. undulata opercula show clear bias toward larger individuals, in common with Aboriginal and seabird middens, when compared to natural shell deposits. Statistical analysis (ANOVA) of the size distributions shows a greater similarity of the Moyjil deposit to the two seabird middens than the two Aboriginal middens. Small individuals (operculum L. undulata as well as smaller shellfish species are absent from the seabird middens studied, but they are present in Aboriginal middens and in the Moyjil deposit. Overall, we conclude that shell properties alone are not sufficient to distinguish which predator collected the shellfish occurring in the deposit.
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Sloss, Craig R., Luke Nothdurft, Quan Hua, Shoshannah G. O’Connor, Patrick T. Moss, Daniel Rosendahl, Lynda M. Petherick et al. „Holocene sea-level change and coastal landscape evolution in the southern Gulf of Carpentaria, Australia“. Holocene 28, Nr. 9 (26.06.2018): 1411–30. http://dx.doi.org/10.1177/0959683618777070.
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A revised Holocene sea-level history for the southern Gulf of Carpentaria is presented based on new data from the South Wellesley Archipelago and age recalibration of previous research. Results confirm that rising sea levels during the most recent post-glacial marine transgression breached the Arafura Sill ca. 11,700 cal. yr BP. Sea levels continued to rise to ca. –30 m by 10,000 cal. yr BP, leading to full marine conditions. By 7700 cal. yr BP, sea-level reached present mean sea-level (PMSL) and continued to rise to an elevation of between 1.5 m and 2 m above PMSL. Sea level remained ca. + 1.5 between 7000 and 4000 cal. yr BP, followed by rapid regression to within ± 0.5 m of PMSL by ca. 3500 cal. yr BP. When placed into a wider regional context results from this study show that coastal landscape evolution in the tropical north of Australia was not only dependent on sea-level change but also show a direct correlation with Holocene climate variability. Specifically, the formation and preservation of beach-rock deposits, intertidal successions, beach and chenier ridge systems hold valuable sea-level and Holocene climate proxies that can contribute to the growing research into lower latitude Holocene sea-level and climate histories.
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Madden Hof, Christine A., Gabriela Shuster, Nev McLachlan, Bev McLachlan, Saranne Giudice, Colin Limpus und Tomoharu Eguchi. „Protecting nests of the Critically Endangered South Pacific loggerhead turtle Caretta caretta from goanna Varanus spp. predation“. Oryx 54, Nr. 3 (29.11.2019): 323–31. http://dx.doi.org/10.1017/s0030605318001564.
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AbstractThe South Pacific subpopulation of the loggerhead turtle Caretta caretta is categorized as Critically Endangered on the IUCN Red List because of significant population declines. Five Queensland beaches support high-density nesting of this subpopulation, but egg and hatchling survival are low at some beaches because of feral and native terrestrial predators. We quantified predation of loggerhead turtle eggs by two species of goanna, Varanus panoptes and Varanus varius, at Wreck Rock beach, one of the turtle's major nesting beaches. In addition, we conducted an experiment to determine the efficacy of a nest protection device. Predation rates at Wreck Rock beach were 15.2% for treatment and 45.8% for non-treatment clutches during the 2013–2014 nesting season. A higher probability of predation (64%) was predicted for the northern beach. Although nests were only partially predated (16.4% of the total number of eggs), nest loss to predators and beach erosion (caused by a cyclone) was 91.7%. If left unmanaged, the cumulative impact of predation and other threats, including those exacerbated by climate change, can cause unsustainable loss of loggerhead turtle nests. This study provides one of the first quantitative data sets on rates of loggerhead turtle clutch predation in the South Pacific. It enhances our understanding of goanna predation impacts and identifies an efficient predator exclusion device for mitigating the effects of terrestrial predators at Wreck Rock beach, and for protecting marine turtle nests across northern Australia and globally.
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Gaughan, DJ, WJ Fletcher und RJ Tregonning. „Spatial and seasonal distribution of eggs and larvae of sandy sprat, Hyperlophus vittatus (Clupeidae), off south-western Australia“. Marine and Freshwater Research 47, Nr. 8 (1996): 971. http://dx.doi.org/10.1071/mf9960971.
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Ichthyoplankton surveys were employed to determine the distribution and spawning season of Hyperlophus vittatus off south-western Australia. Eggs and larvae of H. vittatus were sampled with 500-μm-mesh bongo-nets monthly during 1992, and less regularly during 1993, close to the beach and at 5.5 and 11 km offshore in four areas within the region of the fishery. The spatio-temporal distribution and abundance of eggs indicates that H. vittatus spawns in nearshore marine waters from May to September, with a peak in June and July. Larvae were rarer and less abundant than the eggs and therefore were less reliable indicators of spawning areas and season. Samples taken along transects across the continental shelf in July of both 1993 and 1994 indicated that H. vittatus did not spawn further than 14 km from the coast. Samples taken in July 1994 just beyond the surf zone at beaches, and at corresponding sites 5.5 km offshore, at 3.7-km intervals along 150 km of coastline indicated that H. vittatus spawns throughout the distribution of the fished stock off south-westem Australia.
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Kelaher, Brendan P., Andrew P. Colefax, Alejandro Tagliafico, Melanie J. Bishop, Anna Giles und Paul A. Butcher. „Assessing variation in assemblages of large marine fauna off ocean beaches using drones“. Marine and Freshwater Research 71, Nr. 1 (2020): 68. http://dx.doi.org/10.1071/mf18375.
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The turbulent waters off ocean beaches provide habitat for large marine fauna, including dolphins, sharks, rays, turtles and game fish. Although, historically, these assemblages have proven difficult to quantify, we used a new drone-based approach to assess spatial and temporal variation in assemblages of large marine fauna off four exposed beaches in New South Wales, Australia. In total, 4388 individual large marine animals were identified from 216 drone flights. The most common taxa, bottlenose dolphins (Tursiops spp.) and Australian cownose rays (Rhinoptera neglecta), occurred in 25.5 and 19.9% of flights respectively. White (Carcharodon carcharias), bull (Carcharhinus leucas) and other whaler (Carcharhinus spp.) sharks were observed in <1% of flights. There was significant variation in the structure of assemblages of large fauna among beaches, with those adjacent to riverine estuaries having greater richness and abundance of wildlife. Overall, drone surveys were successful in documenting the spatio-temporal dynamics of an impressive suite of large marine fauna. We contend that emerging drone technology can make a valuable contribution to the ecological information required to ensure the long-term sustainability of sandy-beach ecosystems and associated marine wildlife.
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Kennett, Rod, N. Munungurritj und Djawa Yunupingu. „Migration patterns of marine turtles in the Gulf of Carpentaria, northern Australia: implications for Aboriginal management“. Wildlife Research 31, Nr. 3 (2004): 241. http://dx.doi.org/10.1071/wr03002.
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Marine turtles regularly migrate hundreds to thousands of kilometres between nesting beaches and home foraging grounds. Effective conservation of marine turtles requires understanding of migration patterns in order to facilitate regional cooperation across the turtles' migratory range. Indigenous Australians maintain traditional rights and responsibilities for marine turtle management across much of the northern Australian coast. To better understand turtle migrations and identify with whom the Aboriginal people of north-east Arnhem Land (Yolngu) share turtles, we used satellite telemetry to track the migration routes of 20 green turtles (Chelonia mydas) departing from a nesting beach ~45 km south of Nhulunbuy, north-east Arnhem Land, Northern Territory, Australia. All tracked turtles remained within the Gulf of Carpentaria. These results suggest that the foraging habitat for adults of this nesting population may be largely confined to the Gulf, offering an optimistic scenario for green turtle conservation. Given these results and the critical role indigenous people play in conserving and managing marine turtles, we recommend that a formal network of indigenous communities be established as the foundation of a community-based turtle-management strategy for the Gulf of Carpentaria region.
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Nimbs, Matt J., Tom R. Davis, Sebastian P. Holmes, Lachlan Hill, Samara Wehmeyer, Amanda Prior und Jane E. Williamson. „The Taming of Smeagol? A New Population and an Assessment of the Known Population of the Critically Endangered Pulmonate Gastropod Smeagol hilaris (Heterobranchia, Otinidae)“. Diversity 15, Nr. 1 (09.01.2023): 86. http://dx.doi.org/10.3390/d15010086.
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The genus Smeagol consists of five named species of air-breathing marine slugs (restricted to southern Australia and New Zealand) and three undescribed taxa from southern Japan. Only one species, S. hilaris, is known to be from New South Wales (NSW), and it previously had a known distribution limited to one site, Merry Beach on the south coast. This diminutive invertebrate is classified as critically endangered in NSW due to its extremely restricted distribution and concern about its historically declining numbers. Accordingly, the aims of this study were to survey the known population of S. hilaris at Merry Beach and to explore other potentially suitable sites, using a visual census method, to determine if further populations or species exist in NSW. The resulting quantitative surveys of the known population and a new population at Storm Bay, Kiama, NSW, are reported here. DNA barcoding of a ~650 bp segment of the mitochondrial cytochrome c oxidase I (COI) gene for several individuals from each population confirmed the conspecificity among the two populations. The population at Merry Beach was found to remain viable, while the discovery of the new population of S. hilaris represents a doubling of the known global populations of this species. Details of the highly-specialised niche habitat occupied by Smeagol in New South Wales and recommendations for ongoing management are documented.
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Blome, D., und F. Riemann. „Sandy beach meiofauna of eastern Australia (Southern Queensland and New South Wales). III. Revision of the nematode genus Onyx Cobb, 1891, with a description of three new species (Nematoda : Desmodoridae)“. Invertebrate Systematics 8, Nr. 6 (1994): 1483. http://dx.doi.org/10.1071/it9941483.
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Three new species of the desmodoroid genus Onyx are described from ocean beaches of northern New South Wales, Australia: Onyx macramphis, sp, nov., Onyx adenophorus, sp. nov., and Onyx cannoni, sp. nov. The genus Onyx is revised, the status of the type species, O. perfectus Cobb, 1891, is discussed and an annotated list of the species of the genus is presented. The precaudal position of the caudal glands in O. adenophoius prompts a discussion of the significance of the precaudal position of caudal glands in free-living marine nematode taxonomy in general.
Dissertationen zum Thema "Marine ecology South Australia Christies Beach":
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Loo, Maylene G. K. „Effects of wastewater effluent on macrobenthic infaunal communities at Christies Beach, South Australia /“. Title page, table of contents and abstract only, 2001. http://web4.library.adelaide.edu.au/theses/09PH/09phl8625.pdf.
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Loo, Maylene G. K. „Effects of wastewater effluent on macrobenthic infaunal communities at Christies Beach, South Australia / Maylene G K Loo“. Thesis, 2001. http://hdl.handle.net/2440/21682.
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Includes bibliographical references (leaves 136-154) xvii, 171 leaves ; ill. (some col.), maps ; 30 cm. Aims to determine the effects of an outfall discharging secondarily treated wastewater effluent on benthic communities at Christies Beach with the specific objectives of: characterising the physical, biological and chemical environment of Gulf St Vincent and the study area region; ascertaining the extent to which effluent outfall has affected the macrobenthic infaunal community structure; characterising the structure of macrobenthic infaunal communities in the near shore water of the Adelaide metropolitan coast; and, determining the functional response through measurements of sediment community respiration to these changes. Thesis (Ph.D.)--University of Adelaide, Dept. of Environmental Biology, 2001
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Loo, Maylene G. K. (Maylene Geok Kuan). „Effects of wastewater effluent on macrobenthic infaunal communities at Christies Beach, South Australia“. 2001. http://web4.library.adelaide.edu.au/theses/09PH/09phl8625.pdf.
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Includes bibliographical references (leaves 136-154) Aims to determine the effects of an outfall discharging secondarily treated wastewater effluent on benthic communities at Christies Beach with the specific objectives of: characterising the physical, biological and chemical environment of Gulf St Vincent and the study area region; ascertaining the extent to which effluent outfall has affected the macrobenthic infaunal community structure; characterising the structure of macrobenthic infaunal communities in the near shore water of the Adelaide metropolitan coast; and, determining the functional response through measurements of sediment community respiration to these changes.
