Non-marine ostracods from two Quaternary profiles at Pulbeena and Mowbray Swamps,Tasmania |
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Authors: | Patrick De Deckker |
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Institution: | Department of Biogeography and Geomorphology, Research School of Pacific Studies , Australian National University , Canberra, Australia , 2600 |
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Abstract: | Two spring-fed swamp deposits in northwestern Tasmania which contain non-marine ostracods are characterized by an alternation of marl, peaty marl and peaty layers: the Pulbeena Swamp deposit (4.80 m thick) was formed over approximately the last 80,000 years, and Mowbray Swamp (2 m thick) over about the last 110,000 years. Fifteen ostracod species have been recovered from 179 samples: three are new, three are in open nomenclature and the others have living representatives. The ostracod data compared with pollen curves for both sites demonstrate, for most levels, a good correlation between the abundance of ostracods and that of Cyperaceae and Potamogeton-Triglochin pollen. This implies that ostracods can be successfully used as indicators of different water regimes for spring-fed swamps. Comparison of the ostracod fauna from the two Tasmanian sites is also made with that of other known Australian and New Zealand swamp deposits. |
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Keywords: | Buchia Praebuchia Jurassic Lower Cretaceous Tibet ecology migration extinction morphological trends correlation |
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