Journal articles: 'Palaeoenvironmental record'

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Fl�gel, E. "Halimeda: paleontological record and palaeoenvironmental significance." Coral Reefs 6, no. 3-4 (March 1988): 123–30. http://dx.doi.org/10.1007/bf00302008.

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Lane, Christine S., Catherine M. Martin-Jones, and Thomas C. Johnson. "A cryptotephra record from the Lake Victoria sediment core record of Holocene palaeoenvironmental change." Holocene 28, no. 12 (September 21, 2018): 1909–17. http://dx.doi.org/10.1177/0959683618798163.

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The sediment record from Lake Victoria is an important archive of regional environmental and climatic conditions, reaching back more than 15,000 cal. years before present (15 ka BP). As the largest lake by area in East Africa, its evolution is key to understanding regional palaeohydrological change during the late Pleistocene and Holocene, including controls on the Nile River flow. As well as important palaeoenvironmental proxies, the lake contains a unique record of explosive volcanism from the central Kenyan Rift, in the form of fine-grained volcanic ash (tephra) layers, interpreted as airfall deposits. In the V95-1P core, collected from the central northern basin of the lake, tephra layers vary in concentration from 10s to 10s of 1000s of glass shards per gram of sediment. None of the tephra are visible to the naked eye, and have only been revealed through careful laboratory processing. Compositional analyses of tephra glass shards has allowed the tephra layers to be correlated to previously unrecognized eruptions of Eburru volcano around 1.2 and 3.8 ka, and Olkaria volcano, prior to 15 ka. These volcanoes lie ~300 km east of the core site in the Kenyan Rift. Our results highlight the potential for developing cryptotephra analysis as a key tool in East African palaeolimnological research. Tephra layers offer opportunities for precise correlation of palaeoenvironmental sequences, as well as windows into the eruption frequency of regional volcanoes and the dispersal of volcanic ash.

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Gouramanis, C., P. De Deckker, D. Wilkins, and J. Dodson. "High-resolution, multiproxy palaeoenvironmental changes recorded from Two Mile Lake, southern Western Australia: implications for Ramsar-listed playa sites." Marine and Freshwater Research 67, no. 6 (2016): 748. http://dx.doi.org/10.1071/mf14193.

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Numerous saline playa lakes exist across the arid, semiarid and temperate regions of Australia. These playa lakes exhibit a diverse range of hydrological conditions to which the Australian aquatic invertebrate biota have become adapted and which the biota can utilise as refugia in times of hydrological deterioration. Saline playas also yield palaeoenvironmental records that can be used to infer lacustrine and catchment responses to environmental variability. We present a palaeoenvironmental record recovered from Two Mile Lake, a saline playa from southern Western Australia. Dating, based on quartz optical luminescence and 14C accelerator mass spectrometry of biogenic carbonates and organic fibres, suggests that most of the sediment was rapidly deposited at 4.36 ± 0.25 thousand years ago. Ostracods and non-marine foraminifera preserved in the sediment show periods of faunal colonisation of the lake with oscillations between hypersaline and oligosaline conditions. The geochemistry of ostracod valves and foraminifera tests suggests higher-frequency variability within the lake, and palynological changes indicate landscape changes, possibly in response to fire. The Two Mile Lake record highlights the utility of saline playas as archives of environmental change that can be used to guide wetland health management, particularly under the impacts of a changing climate.

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Arppe, L., K. Aaris-Sørensen, L. Daugnora, L. Lõugas, P. Wojtal, and I. Zupiņš. "The palaeoenvironmental δ13C record in European woolly mammoth tooth enamel." Quaternary International 245, no. 2 (December 2011): 285–90. http://dx.doi.org/10.1016/j.quaint.2010.10.018.

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Perrier, Vincent, Mark Williams, and David J. Siveter. "The fossil record and palaeoenvironmental significance of marine arthropod zooplankton." Earth-Science Reviews 146 (July 2015): 146–62. http://dx.doi.org/10.1016/j.earscirev.2015.02.003.

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Kneisel, Jutta, Walter Dörfler, Stefan Dreibrodt, Stefanie Schaefer-Di Maida, and Ingo Feeser. "Cultural change and population dynamics during the Bronze Age: Integrating archaeological and palaeoenvironmental evidence for Schleswig-Holstein, Northern Germany." Holocene 29, no. 10 (June 24, 2019): 1607–21. http://dx.doi.org/10.1177/0959683619857237.

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In archaeology, change in material culture is viewed as indicating social or cultural transformation and is the basis of our typo-chronological classification of phases and periods. The material culture from northern Germany reveals both quantitative and qualitative changes during the Bronze Age. At the same time, there is also evidence for ‘boom and bust’ cycles in population density/size, as indicated by changing human impact on the environment in several Bronze Age palaeoenvironmental records. These demographic fluctuations may relate to the observed changes in social phenomena in aspects of ideology, technology, food production and habitation. For example, innovations in food production, such as the adoption of new crops and agricultural techniques, could have led to population growth. While usually viewed by archaeologists as a ‘negative’ development, population stress or collapse may have favoured the emergence of new cultural phenomena. In order to test the cause-and-effect relationship between population dynamics and sociocultural change, we synthesise the archaeological evidence – qualitative and quantitative information from settlements, deposition finds (hoards), burials, material culture and architectural remains – for the Bronze Age in northern Germany, mainly Schleswig-Holstein, and compare it with the boom and bust pattern seen in the palaeoenvironmental record. The synchronicity of changes at ca. 1500 BC and ca. 1100 BC reflects the relationship between phases of major sociocultural transformation in the archaeological datasets and booms and busts in the palaeoenvironmental record of the region seen as a proxies for palaeo-demography. This sets the stage for a better understanding of the transformation of practices and relationships in the Bronze Age communities of the region.

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Sanjurjo-Sánchez, Jorge, Carlos Arce-Chamorro, Víctor Barrientos, and Ana Goy-Diz. "Palaeoenvironmental data from fluvial deposits associated to ancient fishing weirs in the Miño river, NW Iberia." Cadernos do Laboratorio Xeolóxico de Laxe. Revista de Xeoloxía Galega e do Hercínico Peninsular 42 (December 28, 2020): 53–68. http://dx.doi.org/10.17979/cadlaxe.2020.42.0.7284.

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Fluvial sediments provide environmental records of the Quaternary. In some cases, fluvial deposits are caused by anthropogenic processes that cause changes in the water regime of some river stretches. This is the case of dams. It has been reported that some dams or partial damming systems existed in the past, at least from some thousands of years ago. Such dams were used for fishing purposes and are referred as fishing weirs. In a recently published work it has been demonstrated that a fluvial thick deposit was caused by a damming system in a river of NW Iberia (River Miño, Pontevedra). Optically stimulated luminescence (OSL) provided the burial age of such fluvial deposit, showing a 1300-year-old fluvial record. The sedimentation rates of the record did not match with known climate fluctuations in the area. In this work, the sedimentation phases of such record are identified, and the detrital and organic matter content is studied to assess any change occurred in the environmental and fluvial conditions during the deposition period of the record that ranges from 814±134 to 1837±11 AD.

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Alonso-Zarza, Ana M. "Palaeoenvironmental significance of palustrine carbonates and calcretes in the geological record." Earth-Science Reviews 60, no. 3-4 (February 2003): 261–98. http://dx.doi.org/10.1016/s0012-8252(02)00106-x.

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9

Chivas, A. R., P. De Deckker, M. Nind, D. Thiriet, and G. Watson. "The pleistocene palaeoenvironmental record of Lake Buchanan: An atypical Australian playa." Palaeogeography, Palaeoclimatology, Palaeoecology 54, no. 1-4 (May 1986): 131–52. http://dx.doi.org/10.1016/0031-0182(86)90121-5.

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Andrič, Maja, Julieta Massaferro, Ueli Eicher, Brigitta Ammann, Markus Christian Leuenberger, Andrej Martinčič, Elena Marinova, and Anton Brancelj. "A multi-proxy Late-glacial palaeoenvironmental record from Lake Bled, Slovenia." Hydrobiologia 631, no. 1 (May 23, 2009): 121–41. http://dx.doi.org/10.1007/s10750-009-9806-9.

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11

Walker, M. J. C., G. R. Coope, and J. J. Lowe. "The Devensian (Weichselian) Lateglacial palaeoenvironmental record from Gransmoor, East Yorkshire, England." Quaternary Science Reviews 12, no. 8 (January 1993): 659–80. http://dx.doi.org/10.1016/0277-3791(93)90006-8.

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12

Proborukmi, Maria Sekar, and Brigitte Urban. "Palaeoenvironmental investigations of the Holocene sedimentary record of the Garding-2 research drill core, northwestern Germany." Zeitschrift der Deutschen Gesellschaft für Geowissenschaften 168, no. 1 (March 1, 2017): 39–51. http://dx.doi.org/10.1127/zdgg/2017/0098.

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13

Wagner, Bernd, Oliver Heiri, and Doreen Hoyer. "Chironomids as proxies for palaeoenvironmental changes in East Greenland: a Holocene record from Geographical Society Ø." Zeitschrift der Deutschen Gesellschaft für Geowissenschaften 156, no. 4 (December 1, 2005): 543–56. http://dx.doi.org/10.1127/1860-1804/2005/0156-0543.

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14

Blyth, Alison J., Asfawossen Asrat, Andy Baker, Pauline Gulliver, Melanie J. Leng, and Dominique Genty. "A new approach to detecting vegetation and land-use Change using high-resolution lipid biomarker records in stalagmites." Quaternary Research 68, no. 3 (November 2007): 314–24. http://dx.doi.org/10.1016/j.yqres.2007.08.002.

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AbstractA hundred-year stalagmite lipid biomarker record from Mechara, southeastern Ethiopia, is presented. The record has been recovered at a 10-yr temporal resolution, marking the first time this has been achieved in stalagmite biomarker work and providing the first opportunity to investigate the relationship between stalagmite lipid records and hydrological transport lags, a vital issue in interpreting palaeoenvironmental signals. Preserved plant-derived n-alkanes and n-alkanols show clear changes in composition over time, relating to known land-use changes in the area, particularly the expansion of agriculture in the early twentieth century. The level of environmental detail provided by this technique, combined with the long-term chronological framework offered by stalagmites, holds significant promise for the investigation of early human environments and their associated climatic and anthropogenic controls.

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Bizzarri, Roberto, Paolo Corrado, Donatella Magri, Edoardo Martinetto, Daniela Esu, Valentina Caprai, Roberto Colacicchi, Giovanni Napoleone, Andrea Albianelli, and Angela Baldanza. "Palaeoenvironmental and climatic inferences from the late early Pleistocene lacustrine deposits in the eastern Tiberino Basin (central Italy)." Quaternary Research 90, no. 1 (June 7, 2018): 201–21. http://dx.doi.org/10.1017/qua.2018.41.

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AbstractWithin the Neogene-Quaternary evolution of the Mediterranean intermountain basins, the eastern Tiberino Basin provides new multifaceted chronological, biostratigraphic, palaeoecological, and palaeoenvironmental information, appreciably improving the knowledge of palaeoenvironmental and climate conditions during the middle-late Matuyama Chron (late early Pleistocene). Shallow to relatively deep lacustrine deposits and alluvial plain deposits, magnetostratigraphically calibrated, hold malacofaunas, ostracofaunas, and carpological remains, as well as a pollen record. Palaeocarpological remains widely originated from the local (azonal) vegetation of waterlogged environments. Nonetheless, some taxa show transitional morphology between possibly extinct Pliocene-Pleistocene forms and living taxa. The pollen record highlights a conifer-dominated forest phase, indicating a temperate-wet interglacial period, well aligned inside the schemes for the same latitudinal band. The abundance of tree taxa currently absent from the Italian peninsula points to pre-Jaramillo late early Pleistocene biostratigraphical characters, here compared to other sections from central Italy, and contributes to a better definition of modes and timing of their disappearance in southern Europe. Malacofaunas and ostracods, still with late early Pleistocene features, together with Charophyte, mark repeated fluctuations in energy, temperature, and chemical composition of water. The overall record identifies an incipient diachronous cooling trend, for the first time recognized in southern Europe.

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16

Bin, Xue, Pan Hongxi, Xia Weilan, and Wang Sumin. "Palaeoenvironmental reconstruction of ximen cuo in historical period inferred from pigment record." Journal of Lake Sciences 9, no. 4 (1997): 295–99. http://dx.doi.org/10.18307/1997.0402.

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17

Horrocks, M., S. L. Nichol, and P. A. Shane. "A 6000‐year palaeoenvironmental record from Harataonga, Great Barrier Island, New Zealand." New Zealand Journal of Botany 40, no. 1 (March 2002): 123–35. http://dx.doi.org/10.1080/0028825x.2002.9512776.

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18

ITZSTEIN‐DAVEY, FREEA. "An Early Holocene Palaeoenvironmental Record from Two Mile Lake, South‐Western Australia." Australian Geographer 35, no. 3 (September 2004): 317–32. http://dx.doi.org/10.1080/0004918042000311340.

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Munyikwa, Kennedy. "The role of dune morphogenetic history in the interpretation of linear dune luminescence chronologies: a review of linear dune dynamics." Progress in Physical Geography: Earth and Environment 29, no. 3 (September 2005): 317–36. http://dx.doi.org/10.1191/0309133305pp451ra.

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Contemporary knowledge on aeolian dune dynamics is reviewed to enable an appraisal of evolutionary mechanisms involved in linear dune stratigraphic sequence development. The degrees of depositional record retention in the dune structures are evaluated and the corollary applied to methods used in the interpretation of luminescence dating chronologies acquired from such sedimentary accumulations. It is demonstrated that morphogenetic aspects of dune development are an imperative element to invoke when carrying out palaeoenvironmental reconstruction using luminescence dating ages acquired from linear dune sequences. To help depict the role of dune morphogenesis, hypothetical scenarios that simulate the preservation of stratigraphical records in linear dune sequences are presented using two different theories that have been advanced to explain origin and development of linear dunes: bidirectional wind regime and helical roll vortices. It is illustrated that linear dune systems that evolve under bidirectional wind influence are intrinsically inefficient at preserving complete records of their depositional history and this places major constraints for palaeoenvironmental reconstruction using luminescence chronologies. When linear dunes develop under the influence of helical roll vortices, on the other hand, it is shown that the degree of sequence preservation would be higher. The possibility of lateral migration of linear dune structures is indicated to be an additional limitation that may encumber the interpretation of luminescence ages.

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20

de Winter, Niels J., Johan Vellekoop, Robin Vorsselmans, Asefeh Golreihan, Jeroen Soete, Sierra V. Petersen, Kyle W. Meyer, Silvio Casadio, Robert P. Speijer, and Philippe Claeys. "An assessment of latest Cretaceous <i>Pycnodonte vesicularis</i> (Lamarck, 1806) shells as records for palaeoseasonality: a multi-proxy investigation." Climate of the Past 14, no. 6 (June 8, 2018): 725–49. http://dx.doi.org/10.5194/cp-14-725-2018.

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Abstract. In order to assess the potential of the honeycomb oyster Pycnodonte vesicularis for the reconstruction of palaeoseasonality, several specimens recovered from late Maastrichtian strata in the Neuquén Basin (Argentina) were subject to a multi-proxy investigation, involving scanning techniques and trace element and isotopic analysis. Combined CT scanning and light microscopy reveals two calcite microstructures in P. vesicularis shells (vesicular and foliated calcite). Micro-XRF analysis and cathodoluminescence microscopy show that reducing pore fluids were able to migrate through the vesicular portions of the shells (aided by bore holes) and cause recrystallization of the vesicular calcite. This renders the vesicular portions not suitable for palaeoenvironmental reconstruction. In contrast, stable isotope and trace element compositions show that the original chemical composition of the foliated calcite is well-preserved and can be used for the reconstruction of palaeoenvironmental conditions. Stable oxygen and clumped isotope thermometry on carbonate from the dense hinge of the shell yield sea water temperatures of 11°C, while previous TEX86H palaeothermometry yielded much higher temperatures. The difference is ascribed to seasonal bias in the growth of P. vesicularis, causing warm seasons to be underrepresented from the record, while TEX86H palaeothermometry seems to be biased towards warmer surface water temperatures. The multi-proxy approach employed here enables us to differentiate between well-preserved and diagenetically altered portions of the shells and provides an improved methodology for reconstructing palaeoenvironmental conditions in deep time. While establishing a chronology for these shells was complicated by growth cessations and diagenesis, cyclicity in trace elements and stable isotopes allowed for a tentative interpretation of the seasonal cycle in late Maastrichtian palaeoenvironment of the Neuquén Basin. Attempts to independently verify the seasonality in sea water temperature by Mg ∕ Ca ratios of shell calcite are hampered by significant uncertainty due to the lack of proper transfer functions for pycnodontein oysters. Future studies of fossil ostreid bivalves should target dense, foliated calcite rather than sampling bulk or vesicular calcite. Successful application of clumped isotope thermometry on fossil bivalve calcite in this study indicates that temperature seasonality in fossil ostreid bivalves may be constrained by the sequential analysis of well-preserved foliated calcite samples using this method.

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Barbieri, Giulia, and Stefano Claudio Vaiani. "Benthic foraminifera or Ostracoda? Comparing the accuracy of palaeoenvironmental indicators from a Pleistocene lagoon of the Romagna coastal plain (Italy)." Journal of Micropalaeontology 37, no. 1 (January 29, 2018): 203–30. http://dx.doi.org/10.5194/jm-37-203-2018.

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Abstract. Integrated analyses of multiple groups of microfossils are frequently performed to unravel the palaeoenvironmental evolution of subsurface coastal successions, where the complex interaction among several palaeoecological factors can be detected with benthic assemblages. This work investigates the palaeoenvironmental resolution potential provided by benthic foraminifera and ostracoda within a Pleistocene lagoonal succession of the Romagna coastal plain (northern Italy). Quantitative approaches and statistical techniques have been applied to both groups in order to understand the main factors that controlled the composition of assemblages and compare the palaeoecological record provided by single fossil groups. The two faunal groups are characterized by the high dominance of opportunistic species (Ammonia tepida–Ammonia parkinsoniana and Cyprideis torosa); however, detailed palaeoecological information is inferred from less common taxa. Benthic foraminiferal assemblages are mainly determined by the frequencies of abnormal individuals and species related to high concentrations of organic matter, showing two assemblages: a stressed assemblage, consistent with a brackish-water environment subject to salinity and oxygen fluctuations, and an unstressed assemblage, which indicates more stable conditions. Despite the lower number of species, ostracoda show more significant differences in terms of species composition and ecological structure between their three assemblages, formed in response to a salinity gradient and indicative of inner, central, and outer lagoon conditions. The stratigraphic distribution of ostracod assemblages shows a general transgressive–regressive trend with minor fluctuations, whereas benthic foraminifera highlight the presence of a significant palaeoenvironmental stress. In this case, the higher abundance along the stratigraphic succession, the higher differentiation of the assemblages, and the well-defined relationship between taxa and ecological parameters determine Ostracoda as the most reliable fossil group for precise palaeoenvironmental reconstructions. Nevertheless, benthic foraminifera indicate palaeoenvironmental stress and can be used to refine the environmental interpretation in the presence of monospecific ostracod assemblages.

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Pudsey, Carol J., and Penny King. "Particle fluxes, benthic processes and the palaeoenvironmental record in the Northern Weddell Sea." Deep Sea Research Part I: Oceanographic Research Papers 44, no. 11 (November 1997): 1841–76. http://dx.doi.org/10.1016/s0967-0637(97)00064-2.

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23

Sluiter, I. R. K., and R. F. Parsons. "On the Holocene Palaeoenvironmental Record from Lake Tyrrell, Northwestern Victoria, Australia-a Reply." Journal of Biogeography 22, no. 1 (January 1995): 149. http://dx.doi.org/10.2307/2846079.

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Jessen, Catherine A., Jørn B. T. Pedersen, Jesper Bartholdy, Marit-Solveig Seidenkrantz, and Antoon Kuijpers. "A late Holocene palaeoenvironmental record from Altona Bay, St. Croix, US Virgin Islands." Geografisk Tidsskrift-Danish Journal of Geography 108, no. 2 (January 2008): 59–70. http://dx.doi.org/10.1080/00167223.2008.10649589.

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Barmawidjaja, D. M., A. F. M. de Jong, K. van der Borg, W. A. van der Kaars, and W. J. Zachariasse. "Kau Bay, Halmahera, a late quaternary palaeoenvironmental record of a poorly ventilated basin." Netherlands Journal of Sea Research 24, no. 4 (December 1989): 591–605. http://dx.doi.org/10.1016/0077-7579(89)90136-1.

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Álvarez-Iglesias, P., M. F. Araújo, A. Gouveia, and T. Drago. "Geochemical analysis of Minho Estuary sedimentary record and its contribution to palaeoenvironmental evolution." Journal of Radioanalytical and Nuclear Chemistry 281, no. 2 (June 19, 2009): 237–40. http://dx.doi.org/10.1007/s10967-009-0109-4.

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PRADO-PÉREZ, ANTONIO J., ANTONIO DELGADO HUERTAS, M. T. CRESPO, A. MARTÍN SÁNCHEZ, and LUÍS PÉREZ DEL VILLAR. "Late Pleistocene and Holocene mid-latitude palaeoclimatic and palaeoenvironmental reconstruction: an approach based on the isotopic record from a travertine formation in the Guadix-Baza basin, Spain." Geological Magazine 150, no. 4 (January 23, 2013): 602–25. http://dx.doi.org/10.1017/s0016756812000726.

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AbstractA comprehensive palaeoenvironmental reconstruction of the last 219 ka has been carried out by determining the isotopic signatures (δ18O and δ13C) in 766 samples of a thermogene travertine formation in the Guadix-Baza Tertiary basin (Granada, SE Spain). This travertine formation was dated from ≈ 220 to ≈ 5 ka by means of the alpha-spectrometry technique. Initially, the study of the δ18O values of the travertine formation was carried out because they are excellent indicators of the overall palaeoclimatic condition of a particular site. Likewise, the evolution of δ13C values, which can be directly related to the biomass development of the site, has also been studied. Finally, an integrated study of both isotopic records has been performed, identifying a total of 12 climatic periods based on their palaeoclimatic and palaeoenvironmental conditions. These periods are grouped into four climatic scenarios: scenario A, characterized by warm and dry periods; scenario B, characterized by cold and humid periods; scenario C, constituted by warm and humid periods; and scenario D, which is characterized by cold and dry periods. Palaeoclimatic scenarios A and B mainly characterized the palaeoclimatic evolution of the site, while in northern Europe the palaeoclimatic evolution is mainly characterized by scenarios C and D. Therefore, it is suggested that the palaeoenvironmental evolution at lower latitudes on the Iberian Peninsula is the opposite of that identified in northern Europe. However, the main climatic events identified at higher latitudes are also reflected in the studied area.

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Stefanini, Bettina S., Pirita O. Oksanen, John P. Corcoran, and Fraser JG Mitchell. "Appraising the cohesion of palaeoenvironmental reconstructions in north-west Spain since the mid-Holocene from a high temporal resolution multi-proxy peat record." Holocene 28, no. 5 (December 7, 2017): 681–94. http://dx.doi.org/10.1177/0959683617744258.

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Investigation of abrupt palaeohydrological regime change remains challenging due to site-specific noise ratios and the limitations of dating control and spatial resolution of multi-proxy records. Some of these issues are addressed through a well dated and highly resolved record from an ombrotrophic peatland in Galicia, north-west Spain. The site is in an ideal location to record marine influences and test models of past palaeoclimatic boundaries and ocean-atmosphere linkages through multi-proxy records of macrofossils, microfossils, charcoal, peat humification and loss-on-ignition data. In conjunction with many regional proxy records of terrestrial and marine origin, the data suggest spatial coherence between 5300 and ca. 3300 cal. BP and continue to link to marine responses afterwards. After ca. 2000 cal. BP, episodes of spatially consistent palaeohydrological change persist but become more short-lived, local and sporadic in north-west Iberia. These indicate an increase in the complexity of drivers of palaeoenvironmental change in recent millennia. Fire history inferred from microscopic charcoal and apparent upland erosion indicated by the loss-on-ignition profile relate to anthropogenic pressure and appear to be linked to local deforestation phases in the Xistral uplands.

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Sansom, Robert S., Emma Randle, and Philip C. J. Donoghue. "Discriminating signal from noise in the fossil record of early vertebrates reveals cryptic evolutionary history." Proceedings of the Royal Society B: Biological Sciences 282, no. 1800 (February 7, 2015): 20142245. http://dx.doi.org/10.1098/rspb.2014.2245.

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The fossil record of early vertebrates has been influential in elucidating the evolutionary assembly of the gnathostome bodyplan. Understanding of the timing and tempo of vertebrate innovations remains, however, mired in a literal reading of the fossil record. Early jawless vertebrates (ostracoderms) exhibit restriction to shallow-water environments. The distribution of their stratigraphic occurrences therefore reflects not only flux in diversity, but also secular variation in facies representation of the rock record. Using stratigraphic, phylogenetic and palaeoenvironmental data, we assessed the veracity of the fossil records of the jawless relatives of jawed vertebrates (Osteostraci, Galeaspida, Thelodonti, Heterostraci). Non-random models of fossil recovery potential using Palaeozoic sea-level changes were used to calculate confidence intervals of clade origins. These intervals extend the timescale for possible origins into the Upper Ordovician; these estimates ameliorate the long ghost lineages inferred for Osteostraci, Galeaspida and Heterostraci, given their known stratigraphic occurrences and stem–gnathostome phylogeny. Diversity changes through the Silurian and Devonian were found to lie within the expected limits predicted from estimates of fossil record quality indicating that it is geological, rather than biological factors, that are responsible for shifts in diversity. Environmental restriction also appears to belie ostracoderm extinction and demise rather than competition with jawed vertebrates.

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Knudsen, Karen Luise, Keld Conradsen, ,. Susanne Heier Nielsen, and Marit-Solveig Seidenkrantz. "Quaternary palaeoceanography and palaeogeography in northern Denmark: a review of results from the Skagen cores." Bulletin of the Geological Society of Denmark 43 (July 14, 1996): 22–31. http://dx.doi.org/10.37570/bgsd-1996-43-03.

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Palaeoenvironmental reconstructions from the Skagen record contribute to the understanding of Late Quatemary climatic changes and variations in the oceanographic circulation pattem in the entire North Atlantic region. The Skagen cores penetrated c. 192 m of Quatemary sediments comprising two marine Late Quaternary records: A 7 m marine unit (185.3-178.3 m) comprised the entire last interglacial, including its lower and upper transitions (Late Saalian-Eemian-Early Weichselian), while the upper 132 m of marine deposits covered the last about 15,000 years from the Late Weichselian through the Holocene, including the Pleistocene-Holocene transition. Results from the study of lithology, foraminifera, stable isotope measurements and radiocarbon dates are reviewed while emphasizing the most important contributions to the general understanding of the North Atlantic Quatemary history

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Monien, Patrick, Bernhard Schnetger, Hans-Jürgen Brumsack, H. Christian Hass, and Gerhard Kuhn. "A geochemical record of late Holocene palaeoenvironmental changes at King George Island (maritime Antarctica)." Antarctic Science 23, no. 3 (February 1, 2011): 255–67. http://dx.doi.org/10.1017/s095410201100006x.

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AbstractDuring RV Polarstern cruise ANT-XXIII/4 in 2006, a gravity core (PS 69/335-2) and a giant box core (PS 69/335-1) were retrieved from Maxwell Bay off King George Island (KGI). Comprehensive geochemical (bulk parameters, quantitative XRF, Inductively Coupled Plasma Mass Spectrometry) and radiometric dating analyses (14C, 210Pb) were performed on both cores. A comparison with geochemical data from local bedrock demonstrates a mostly detrital origin for the sediments, but also points to an overprint from changing bioproductivity in the overlying water column in addition to early diagenetic processes. Furthermore, ten tephra layers that were most probably derived from volcanic activity on Deception Island were identified. Variations in the vertical distribution of selected elements in Maxwell Bay sediments further indicate a shift in source rock provenance as a result of changing glacier extents during the past c. 1750 years that may be linked to the Little Ice Age and the Medieval Warm Period. Whereas no evidence for a significant increase in chemical weathering rates was found, 210Pb data revealed that mass accumulation rates in Maxwell Bay have almost tripled since the 1940s (0.66 g cm-2 yr-1 in ad 2006), which is probably linked to rapid glacier retreat in this region due to recent warming.

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Ortiz, J. E., T. Torres, A. Delgado, E. Reyes, and A. Díaz-Bautista. "A review of the Tagus river tufa deposits (central Spain): age and palaeoenvironmental record." Quaternary Science Reviews 28, no. 9-10 (May 2009): 947–63. http://dx.doi.org/10.1016/j.quascirev.2008.12.007.

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Katsamudanga, Seke, and Ancila Nhamo. "A review of the reconstructed palaeoenvironmental record of Zimbabwe and call for multidisciplinary research." Palaeogeography, Palaeoclimatology, Palaeoecology 461 (November 2016): 460–71. http://dx.doi.org/10.1016/j.palaeo.2016.08.041.

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Grattan, J. P., and F. B. Pyatt. "Volcanic eruptions dry fogs and the European palaeoenvironmental record: localised phenomena or hemispheric impacts?" Global and Planetary Change 21, no. 1-3 (July 1999): 173–79. http://dx.doi.org/10.1016/s0921-8181(99)00013-2.

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Bateman, M. D., C. H. Boulter, A. S. Carr, C. D. Frederick, D. Peter, and M. Wilder. "Preserving the palaeoenvironmental record in Drylands: Bioturbation and its significance for luminescence-derived chronologies." Sedimentary Geology 195, no. 1-2 (February 2007): 5–19. http://dx.doi.org/10.1016/j.sedgeo.2006.07.003.

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TILJANDER, MIA, MATTI SAARNISTO, ANTTI E. K. OJALA, and TIMO SAARINEN. "A 3000-year palaeoenvironmental record from annually laminated sediment of Lake Korttajarvi, central Finland." Boreas 32, no. 4 (June 28, 2008): 566–77. http://dx.doi.org/10.1111/j.1502-3885.2003.tb01236.x.

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Satkunas, Jonas, Alma Grigiene, Ilya V. Buynevich, and Julius Taminskas. "A new Early-Middle Weichselian palaeoenvironmental record from a lacustrine sequence at Svirkanciai, Lithuania." Boreas 42, no. 1 (November 19, 2012): 184–93. http://dx.doi.org/10.1111/j.1502-3885.2012.00280.x.

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Shala, Shyhrete, Karin F. Helmens, Krister N. Jansson, Malin E. Kylander, Jan Risberg, and Ludvig Löwemark. "Palaeoenvironmental record of glacial lake evolution during the early Holocene at Sokli, NE Finland." Boreas 43, no. 2 (September 13, 2013): 362–76. http://dx.doi.org/10.1111/bor.12043.

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Saarnisto, Matti, Antti Ojala, Mia Tiljander, and Timo Saarinen. "A 3000-year palaeoenvironmental record from annually laminated sediment of Lake Korttajärvi, central Finland." Boreas 32, no. 4 (December 1, 2003): 566–77. http://dx.doi.org/10.1080/03009480310004152.

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Aubry, Thierry, Luca A. Dimuccio, Miguel Almeida, Maria J. Neves, Diego E. Angelucci, and Lúcio Cunha. "Palaeoenvironmental forcing during the Middle–Upper Palaeolithic transition in central-western Portugal." Quaternary Research 75, no. 1 (January 2011): 66–79. http://dx.doi.org/10.1016/j.yqres.2010.11.002.

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AbstractGeoarchaeological analysis of the Middle and Upper Palaeolithic record preserved in cave, rock-shelter and open-air sites in the northern sector of the Meso-Cenozoic of the Western Iberian Peninsula margin (Portugal) reveals several disconformities (erosive unconformities), hiatuses and surface stabilization phases. A recurrent disconformity, dated to ca. 29,500–32,000 cal yr BP, in the time range of Heinrich event 3, must correspond to a main erosive event related to the impacts of climate change on the landscape, including a reduction in vegetation cover and altered precipitation patterns, with the consequent accelerated down-cutting by stream systems, slope reactivation and endokarstic reorganisation, causing the erosion of sediments and soils accumulated in cave, rock-shelter and open-air sites. These processes create a preservation bias that may explain why Early Upper Palaeolithic finds in primary deposition context remains exceptional in the carbonate areas of central-western Portugal, and possibly elsewhere in the other places of Iberia. The impact of such site formation processes must therefore be duly considered in interpretations of the current patchy and scarce archaeological record of the Middle-Upper Palaeolithic transition in south-western Iberia.

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Girard, Vincent, Simona Saint Martin, Eric Buffetaut, Jean-Paul Saint Martin, Didier Néraudeau, Daniel Peyrot, Guido Roghi, Eugenio Ragazzi, and Varavudh Suteethorn. "Thai amber: insights into early diatom history?" BSGF - Earth Sciences Bulletin 191 (2020): 23. http://dx.doi.org/10.1051/bsgf/2020028.

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The origin of the diatoms still remains enigmatic. Their fossil record is scarce until the Late Cretaceous and great divergences exist between molecular data and the earliest fossil evidence. While molecular data indicate an origin during the Triassic or Early Jurassic, early fossil evidence is only from the Late Jurassic-Early Cretaceous. The discovery of diatoms in French mid-Cretaceous amber by the end of the 2000s already suggested a potential bias in the diatom fossil record as it made older many diatom lineages, the record of which hitherto began at the end of the Cretaceous. The Jurassic/Early Cretaceous fossil record of diatoms is extremely sparse and any new occurrence is important for retracing the evolutionary, palaeogeographical and palaeoenvironmental history of diatoms. Thai amber has yielded a new diatom specimen that has been attributed to the genus Hemiaulus. Fossil assemblages and sedimentological data indicate that Thai amber and its Hemiaulus specimen are Late Jurassic in age. This discovery represents the oldest hitherto known specimen of Hemiaulus and so extends the fossil record of the bipolar diatoms and of the genus Hemiaulus by several dozens of millions of years and brings closer the fossil evidence and molecular data (that estimated an origin of the bipolar diatoms about 150 Ma ago). It reinforces the hypothesis of a pre-Cretaceous fossil diatom records and also supports an origin of the diatoms in shallow coastal environments.

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Shah, Rayees Ahmad, Hema Achyuthan, Aasif Mohmad Lone, Sanjeev Kumar, Pankaj Kumar, Rajveer Sharma, Mohd Amir, Atul Kumar Singh, and Chinmay Dash. "Holocene palaeoenvironmental records from the high-altitude Wular Lake, Western Himalayas." Holocene 30, no. 5 (January 16, 2020): 733–43. http://dx.doi.org/10.1177/0959683619895592.

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We present a comprehensive record of Holocene (11,590–628 cal. yr BP) climate and hydrographic changes around the Wular Lake located in Kashmir Valley, India. Based on the multi-proxy investigations, we have identified three phases of wet climate conditions that prevailed from the commencement of the Holocene Epoch – 9000 cal. yr BP, 8100–6650 cal. yr BP and 6350–5000 cal. yr BP, whereas periods of dry climate were observed during 9000–8100 cal. yr BP, 6650–6350 cal. yr BP and ~5000 to 4000 cal. yr BP. The results also suggested that the lake widened and deepened significantly around 6350–5000 cal. yr BP. The results indicated desiccation and the exposure of the lake margin around 5000–4500 cal. yr BP. The sedimentation rate since 4500–628 cal. yr BP was quite low for detailed paleoclimate interpretations. Oscillations in lake extension and deepening appear to be due to changing intensity of westerly moisture in the region, and we correlate several of the low lake-level phases to the Bond events caused by North Atlantic ice rafting events.

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Bos, Johanna A. A., and Bas van Geel. "Palaeoenvironmental reconstruction based on the Early Holocene Haelen sequence, near Roermond (southeastern Netherlands)." Netherlands Journal of Geosciences 96, no. 2 (September 14, 2016): 115–30. http://dx.doi.org/10.1017/njg.2016.35.

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AbstractHigh-resolution Early Holocene palynological records from the middle Meuse River valley were missing until recently. In order to investigate environmental and inferred climate changes during the Preboreal, sediments from a former residual channel of the Meuse River near Haelen were studied. Detailed multi-proxy analyses, including microfossils, macroremains and loss-on-ignition measurements, were carried out at a high temporal resolution. An accurate chronology of the >1000-year-long record was provided by accelerator mass spectrometry (AMS)14C wiggle-match dating.The channel was abandoned during the late Younger Dryas, when accumulation started with gyttja. This period was characterised by an open landscape with herbaceous vegetation and dwarf shrubs. Patches of birch were present on the floodplains around depressions and (oxbow) lakes. Some pines survived the cold in sheltered locations. In the residual channel the water was flowing temporarily and aquatic plant communities developed with predominantly submerged taxa and algae. The shores were fringed by willows and sedges and were probably used as a watering place by large herbivores.Following the Late-glacial/Holocene climate warming, dated in the Haelen record around 11,520 cal BP, birch woodlands expanded on the river floodplains and slopes of terraces during the Friesland Phase. Open vegetation with herbs and juniper remained present on the nearby terraces. An increase in the water level of the oxbow lake and seepage of groundwater occurred. Along the shores herbaceous vegetation was present. Around 11,420 cal BP, birch expansion was interrupted by the dry continental Rammelbeek Phase. On the river floodplain and terrace slopes, open grassland vegetation developed and on the terraces, grasslands and open grounds were abundant. In the residual channel the water became stagnant and floating-leaved vegetation developed. At the start of the Late Preboreal, around 11,270 cal BP, a sudden shift to a more humid climate took place and birch forests expanded again on the river floodplains and terrace slopes. Poplar became more abundant in these forests, and birch and poplar swamp forests were present near the site. Pine expanded atc. 11,160 cal BP on the higher sandy and gravelly terraces. During the Late Preboreal a reed swamp developed on the shores of the residual channel.At the onset of the Boreal, around 10,710 cal BP, woodlands, initially with hazel, but later also with oak, elm and lime, started to develop, while pine forest remained present on the higher terraces. Hazel shrubs were growing on the terrace slopes. Birch and poplar forests occurred on moist parts of the floodplains. Around the residual channel they formed a zone behind the reed swamps surrounding the oxbow lake. Vegetation with water lilies was present in open water.The Haelen record shows, despite a lack of archaeological evidence, indications for the presence of Mesolithic people in the area during the Preboreal. These include the occurrence of (natural or man-made) fires, in combination with the presence of trampled areas and disturbed grounds and possibly consumption of Nymphaeaceae seeds and tubers.

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Hart, Diccon, Lucy Allott, Michael Bamforth, Martin Bates, Sarah Jones, Peter Marshall, Mike Walker, and Alison Weisskopf. "Early Neolithic Trackways in the Thames Floodplain at Belmarsh, London Borough of Greenwich." Proceedings of the Prehistoric Society 81 (March 20, 2015): 215–37. http://dx.doi.org/10.1017/ppr.2015.1.

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Excavations in 2008 on the site of a proposed new prison at Belmarsh West, London Borough of Greenwich, found the heavily decayed remains of two superimposed Early Neolithic trackways. These structures, which are radiocarbon dated to the first quarter of the 4th millennium calBCcomprise some of the earliest structures yet encountered in the London Basin. The trackways were found towards the base of a peat sequence, immediately above the underlying Devensian gravels. The associated palaeoenvironmental record suggests that they were constructed in response to rising base levels, within a local floodplain environment dominated by alder carr, in order to maintain mobility across an expanding wetland landscape. The archaeological and geomorphological background to the excavations and a description of the results of the excavations are presented, with a particular emphasis on the Neolithic structures. The significance and wider context of the structures are examined through a consideration of their construction, wider palaeoenvironmental context, and the ways in which the structures can shed light on the nature of Early Neolithic subsistence strategies and land-use within the Thames floodplain.

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Sabol, Martin, Diana Slyšková, Silvia Bodoriková, Tomáš Čejka, Andrej Čerňanský, Martin Ivanov, Peter Joniak, Marianna Kováčová, and Csaba Tóth. "Revised floral and faunal assemblages from Late Pleistocene deposits of the Gánovce-Hrádok Neanderthal site – biostratigraphic and palaeoecological implications." Fossil Imprint 73, no. 1-2 (August 15, 2017): 182–96. http://dx.doi.org/10.2478/if-2017-0010.

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Revisory research of floral and animal assemblages from the Neanderthal site of Gánovce-Hrádok confirmed the previous stratigraphic division of the travertine mound to five horizons on the basis of different petrological and palaeontological contents, indicating climatic and palaeoenvironmental changes in the vicinity, from the Saalian termination to the Holocene. At least two species of molluscs and approximately 20 taxa of vertebrates have been determined, and at least 8 endocasts of large mammals have been re-discovered. Revised floral record contained 570 specimens, but no more than 20% were suitable for taxonomic revision.

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Kouli, Katerina, Alessia Masi, Anna Maria Mercuri, Assunta Florenzano, and Laura Sadori. "Regional Vegetation Histories: An Overview of the Pollen Evidence from the Central Mediterranean." Late Antique Archaeology 11, no. 1 (October 3, 2015): 69–82. http://dx.doi.org/10.1163/22134522-12340053.

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Abstract Vegetation patterns during the 1st millennium AD in the central Mediterranean, exhibit a great variability, due to the richness of these habitats and the continuous shaping of the environment by human societies. Variations in land use, witnessed in the pollen record, reflect the role that local vegetation and environmental conditions played in the choices made by local societies. The interdisciplinary study of off-site cores remains the key evidence for palaeoenvironmental transformations mirroring the ‘semi-natural’ vegetation, and revealing temporal fluctuations and the amount of human impact on a regional scale.

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Dabkowski, Julie, Nicole Limondin‑Lozouet, and Marie‑Claude Jolly‑Saad. "Palaeoenvironmental and biostratigraphic data from the Resson tufa (Aube, France): reassessment of an eemian record." Quaternaire, no. 31/2 (June 1, 2020): 133–44. http://dx.doi.org/10.4000/quaternaire.13778.

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Jha, Neerja, Harinam Joshi, and Shreya Mishra. "Record of Gondwana Plant Mega- and Microfossils in Nimugudem Area, Telangana, India:Palynodating and Palaeoenvironmental Interpretation." Current Science 111, no. 2 (July 25, 2016): 416. http://dx.doi.org/10.18520/cs/v111/i2/416-424.

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Rudenko, Olga, Pavel E. Tarasov, Henning A. Bauch, and Ekaterina Taldenkova. "A Holocene palynological record from the northeastern Laptev Sea and its implications for palaeoenvironmental research." Quaternary International 348 (October 2014): 82–92. http://dx.doi.org/10.1016/j.quaint.2014.04.032.

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Wooller, Matthew J., Émilie Saulnier-Talbot, Ben A. Potter, Soumaya Belmecheri, Nancy Bigelow, Kyungcheol Choy, Les C. Cwynar, et al. "A new terrestrial palaeoenvironmental record from the Bering Land Bridge and context for human dispersal." Royal Society Open Science 5, no. 6 (June 2018): 180145. http://dx.doi.org/10.1098/rsos.180145.

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Palaeoenvironmental records from the now-submerged Bering Land Bridge (BLB) covering the Last Glacial Maximum (LGM) to the present are needed to document changing environments and connections with the dispersal of humans into North America. Moreover, terrestrially based records of environmental changes are needed in close proximity to the re-establishment of circulation between Pacific and Atlantic Oceans following the end of the last glaciation to test palaeo-climate models for the high latitudes. We present the first terrestrial temperature and hydrologic reconstructions from the LGM to the present from the BLB's south-central margin. We find that the timing of the earliest unequivocal human dispersals into Alaska, based on archaeological evidence, corresponds with a shift to warmer/wetter conditions on the BLB between 14 700 and 13 500 years ago associated with the early Bølling/Allerød interstadial (BA). These environmental changes could have provided the impetus for eastward human dispersal at that time, from Western or central Beringia after a protracted human population standstill. Our data indicate substantial climate-induced environmental changes on the BLB since the LGM, which would potentially have had significant influences on megafaunal and human biogeography in the region.

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Journal articles on the topic 'Palaeoenvironmental record'

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