Relevant bibliographies by topics / Paleobotany – Holocene

Academic literature on the topic 'Paleobotany – Holocene'

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Published: 4 June 2021
Last updated: 29 January 2023

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Journal articles on the topic "Paleobotany – Holocene"

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Duncan, Neil, Marianne Cardale Schrimpjf, Ana Maria Groot, Pedro Botero, Alejandra Betancourt, and Juan Carlos Berrio. "HUMAN OCCUPATION AND THE ENVIRONMENT DURING THE HOLOCENE IN THE RIVER CAUCA VALLEY, COLOMBIA: THE EVIDENCE FROM PALEOBOTANY AND FROM SOIL STUDIES." Diálogo andino, no. 41 (June 2013): 159–70. http://dx.doi.org/10.4067/s0719-26812013000100010.

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Shasherina, L. V., A. V. Panin, O. K. Borisova, N. N. Naryshkina, and O. N. Uspenskaya. "Reconstruction of Holocene environmental conditions based on the complex studies of Lake Shnitkino sediments (Tver Region, Russia)." Limnology and Freshwater Biology, no. 4 (2022): 1574–76. http://dx.doi.org/10.31951/2658-3518-2022-a-4-1574.

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Abstract. The presented study aims to investigate the paleoenvironmental conditions of Lake Shnitkino in Tver Region (northwestern European Russia). Two sediment cores from the lake bottom were obtained and analyzed using lithological and paleobotanic methods. The Holocene landscape and climatic characteristics of the lake basin are reconstructed. Four stages of lake evolution were inferred: 1) Younger Dryas/Preboreal transition, 2) Boreal, 3) Middle-Late Holocene, and 4) Recent time.
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Aloïsi, Jean-Claude, André Monaco, Nadine Planchais, Jean Thommeret, and Yolande Thommeret. "The Holocene transgression in the Golfe du Lion, southwestern France: Paleogeographic and paleobotanical evolution." Géographie physique et Quaternaire 32, no. 2 (January 25, 2011): 145–62. http://dx.doi.org/10.7202/1000346ar.

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Starting from multidisciplinary punctual results, the authors offer a synthesis of lithologie seismic analysis, sedimentology, palynology and radiometrical measurements from sites in sea and at the border of the Golfe du Lion. The dated samples (more than 120) and the variety of the studied sites has permitted a true methodological approach. The authors also propose a curve of the rising of the Holocene sea that takes into account two major facts: the géomorphologie localisation of the site and the characteristics of the sedimentary environment (sedimentary facies and paleobotanic environment). They conclude to: 1) a generalised rapid rise of the transgression since 14,000 years BP, with an acceleration from 8000 to 6000 years BP; 2) intervals of relative stability from 12 000 to 8 000 years BP; 3) a high sea-level at +2 m at around 4500 years BP.
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Hughes, O. L., C. Tarnocai, and C. E. Schweger. "Pleistocene stratigraphy, paleopedology, and paleoecology of a multiple till sequence exposed on the Little Bear River, Western District of Mackenzie, N.W.T., Canada." Canadian Journal of Earth Sciences 30, no. 4 (April 1, 1993): 851–66. http://dx.doi.org/10.1139/e93-071.

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The Little Bear River section lies in a transition zone between Mackenzie Lowland and Canyon Ranges of Mackenzie Mountains. Within the transition zone, the maximum extent of the Laurentide ice sheet overlaps the former extent of montane glaciers that emanated from the higher parts of Canyon Ranges or from the still higher Backbone Ranges to the southwest. Five montane tills, each with a paleosol developed in its upper part, indicate five separate glaciations during each of which a valley glacier emanating from the headwaters of Little Bear River extended eastward into the transition zone. The uppermost of the montane tills is overlain by boulder gravel containing rocks of Canadian Shield origin deposited by the Laurentide ice sheet.Solum and B horizon depths, red colours, and lack of leaching and cryoturbation indicate that although each successive interglacial interval was cooler than the preceding one, even the last of the intervals was warmer than the Holocene. Climatic conditions during one of the intervals inferred from the paleobotanic data, particularly spruce forest development, are consistent with conditions inferred from the associated paleosol.The uppermost of the montane tills is thought to correlate with till of Reid (Illinoian) age in central Yukon. The paleosol developed on that till is, accordingly, thought to correlate with the Diversion Creek paleosol developed on drift of Reid age. The Laurentide boulder gravel is assigned to a stade of Hungry Creek Glaciation of Late Wisconsinan age. The Laurentide ice sheet reached its apparent all-time western limit during the Hungry Creek Glaciation maximum.
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Lapteva, E. G., and O. M. Korona. "New Data on the Dynamics of Vegetation of the Malozemelskaya Tundra in the Holocene on the Basis of a Comprehensive Paleobotanic Study of Lake and Bog Deposits in the Lake Golodnaya Guba Area." Russian Journal of Ecology 53, no. 2 (April 2022): 91–99. http://dx.doi.org/10.1134/s1067413622020059.

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Dissertations / Theses on the topic "Paleobotany – Holocene"

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Nelson, Nathan Alfred. "Holocene fire and climate in rangeland ecosystems of Southwestern Idaho." [Boise, Idaho] : Boise State University, 2009. http://scholarworks.boisestate.edu/td/24/.

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Hoyt, Cathryn A. "Grassland to desert : Holocene vegetation and climate change in the northern Chihuahuan Desert /." Digital version:, 2000. http://wwwlib.umi.com/cr/utexas/fullcit?p9992819.

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Milburn, Paula. "Palaeoenvironmental investigation into aspects of the vegetation history of north Fife and south Perthshire, Scotland." Thesis, University of Edinburgh, 1997. http://hdl.handle.net/1842/10541.

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Results from the palaeoenvironmental investigations into the Holocene vegetation history of three sites in eastern lowland Scotland are presented. Two of the sites, Cruvie and Pitbladdo, are located in north Fife; the third site, Methvern is situated in south Perthshire. Cruvie is located in a kettle-hole and provides data extending from the Late-glacial to ea. 3900 BP. Pitbladdo is a former bog and cores from this site provide data on the period from ca. 8000 to 3900 BP. Methvern is a well-maintained raised bog and provides data that spans the entire Holocene. Relative, concentration and pollen preservation data are supplemented by loss-on-ignition, pH and magnetic susceptibility analyses. Microscopic charcoal data are also recorded. Radiocarbon dates allow comparisons to be made between similar events at different sites, resulting in a detailed picture of temporal and spatial patterns of palaeoecological change within a small geographical area. Attention is focused upon the identification of human impact on the environment during the early to mid Holocene. The influences of succession and climate change in determining patterns of vegetation change are also considered. The data obtained indicate that human activity may have had a limited impact on the environment in this area during the Mesolithic, but no unequivocal evidence is recorded. Anthropogenic impacts are more clearly identified during the Neolithic period and from the late Neolithic/early Bronze Age, human activity is considerable and includes pastoral and mixed farming. The value of tephra as a dating tool in this area of eastern Scotland is considered. The absence of tephra at the three sites investigated has led to the formulation of a hypothesis linking patterns of orographic rainfall and tephra deposition within Scotland. The study highlights the difficulties of determining the causal factors of vegetation change and the limitations of palaeoecological data in the identification of anthropogenic activity during the early Holocene. The recognition of climate signals is discussed and the routine counting of microscopic charcoal at all sites is proposed. It is suggested that further research is required to clarify the boundaries of tephra deposition in Britain. Finally the diverse patterns of change recorded within the study area emphasise the need for a network of closely spaced and well dated palaeoenvironmental sites covering the regions of Scotland, leading to the recognition of local patterns of environmental change.
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Brunelle-Daines, Andrea. "Holocene changes in fire, climate and vegetation in the northern Rocky Mountains of Idaho and western Montana /." view abstract or download file of text, 2002. http://wwwlib.umi.com/cr/uoregon/fullcit?p3061935.

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Thesis (Ph. D.)--University of Oregon, 2002.
Typescript. Includes vita and abstract. Includes bibliographical references (leaves 170-178). Also available for download via the World Wide Web; free to University of Oregon users.
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Shafer, David Scott. "The timing of late Quaternary monsoon precipitation maxima in the southwest United States." Diss., The University of Arizona, 1989. http://hdl.handle.net/10150/184766.

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The southwest monsoon is responsible for a summer precipitation maximum for much of the southwest U.S. Biostratigraphies of pollen, plant macrofossils, and aquatic fossils in lakes from near modern monsoon boundaries in conjunction with climate modelling suggests variations in strength of the monsoon system during the late Quaternary. At Montezuma Well, Arizona, high percentages of Pinus and Juniperus pollen as well as maximum influxes of Quercus and Gramineae pollen suggest a shift from dominantly winter to summer precipitation between ca. 12,000 and 9000 yr BP. Maximum aridity occurred 7000-4000 yr BP, coincident with lowest lake levels. In the High Plateaus region of the Colorado Plateau, high Artemisia to Chenopodiaceae-Amaranthus pollen ratios suggests precipitation maxima until ca. 6000 yr BP at Fryingpan Lake and 5000 yr BP at Posy Lake. Pollen records suggest that Pinus edulis, P. ponderosa, and Quercus gambelii, were present on the western Colorado Plateau throughout the Holocene. Expansion of shadscale steppe vegetation at low elevations and upslope movement of ecotones for Pinus edulis, P. ponderosa, and Q. gambelii after ca. 6000 yr BP and low lake levels ca. 5000-3700 yr BP, suggest a period of maximum aridity from decreased summer precipitation. In the San Luis Valley, Colorado, pollen records from Head Lake on the basin floor suggest an expansion of oaks and junipers at the Pleistocene/Holocene boundary that may indicate increased summer precipitation. Lake levels of Head Lake fell sharply after ca. 9500 yr BP. Pollen records from Como Lake in the Sangre de Cristo Mountains suggest that Pinus ponderosa was established in the area by ca. 12,000 yr BP and Pinus edulis by ca. 9500 yr BP. Highland regions such as the High Plateaus (until ca. 6000-5000 yr BP) and central Colorado (until ca. 4000 yr BP) may have experienced Holocene summer precipitation maxima later into the Holocene than sites in lower elevation regions. Regional orographic uplift as a catalyst for convective summer precipitation may be responsible for the duration of summer precipitation maxima in these regions. On a longitudinal gradient, sites to the west such as in the southern Great Basin and Mohave Desert may have recorded enhanced summer precipitation earlier, reflecting different histories of the low-level jets in the southwest. The paleoecologic record generally confirm predictions of general circulation models (GCMs) that southwest monsoon circulation was enhanced from 12,000-6000 yr BP in response to peaks in annual (11,500-11,000 yr BP) and summer insolation (10,000-9000 yr BP) during the late Quaternary.
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Oswald, William Wyatt. "Holocene vegetational history of the central Arctic foothills, northern Alaska : pollen representation of tundra and edaphic controls on the response of tundra to climate change /." Thesis, Connect to this title online; UW restricted, 2002. http://hdl.handle.net/1773/5578.

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Wilbur, Cricket C. "A History of Place: Using Phytolith Analysis to Discern Holocene Vegetation Change on Sanak Island, Western Gulf of Alaska." Antioch University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=antioch1395927847.

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Itzstein-Davey, Freea. "Changes in the abundance and diversity of the Proteaceae over the Cainozoic in south-western Australia." University of Western Australia. School of Earth and Geographical Sciences, 2003. http://theses.library.uwa.edu.au/adt-WU2004.0040.

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South-western Australia is a globally significant hotspot of plant species diversity, with high endemism and many rare plant species. Proteaceae is a major component of the south-western flora, though little is known about how its diversity developed. This prompted the present study to investigate changes in the abundance and diversity of Proteaceae, in south-western Australia, by concurrently studying three sediment sequences of different ages over the Cainozoic and a modern pollen rain study. Modern pollen-vegetation relationships in the two Proteaceae species rich nodes of the northern and southern sandplains were quantified. It was found that Proteaceous genera can contribute up to 50% of the total pollen rain. Banksia/Dryandra pollen was the most abundant with Isopogon, Petrophile and Lambertia also commonly noted. The vegetation and environmental setting during three pivotal periods of the Cainozoic: Holocene, Pliocene and Eocene, were investigated. Eocene sediment from Lake Lefroy confirmed the presence of a Nothofagus dominated rainforest in the Middle to Late Eocene. At this time Proteaceae species were at least as diverse as today, if not more so, contributing up to a maximum of 42% of the total pollen rain. Taxa recorded included: Banksieaeidites arcuatus, Propylipollis biporus, Proteacidites confragosus, Proteacidites crassus, Proteacidites nasus and Proteacidites pachypolus. Several taxa remain undescribed and unnamed. This study also identified that Proteaceae pollen representation varies across small lateral distances. Thus as samples varied spatially and temporally, single core samples are not sufficient to identify spatial patterns in Proteaceae or other low pollen producing taxa. Some 7.91 cm of laminated Pliocene sediment from Yallalie, south-western Australia, was also examined. It covers 84 years of record and confirmed other regional reports that south-western Australia was covered by a rich vegetation mosaic consisting of heathy and wet rainforest elements. Although Proteaceae species were a consistent component of the pollen counts, diversity and abundance (maximum of 5%) was low throughout the studied section. Banksia/Dryandra types were most commonly noted. A 2 m core was retrieved from Two Mile Lake, near the Stirling Ranges and provided an early Holocene vegetation history. Geochemical and palynological evidence recorded little change, suggesting the environment of deposition was relatively uniform. Proteaceae species were noted throughout the core, though in low numbers, at a maximum of 3.5 % of the total pollen rain. Banksia/Dryandra was the most abundant while Isopogon, Lambertia, Petrophile and Franklandia were also noted. A regression model was developed through the modern pollen rain study to predict the number of Proteaceae in the vegetation. This was also applied to the fossil pollen records. The estimated number of Proteaceae species in the Eocene suggests a maximum of 20 and a minimum of 10 taxa. For the Pliocene record, an estimated 7 - 9 species was found and for the Holocene pollen, between 7 - 8 were present. Thus the Eocene was similar in Proteaceae diversity to today. The results from the Pliocene and Holocene suggest that Proteaceae diversity was lower than today. Findings of this research indicate that Proteaceae species are an important and consistent component of vegetation in south-western Australia over the Cainozoic. It is likely that both changing pollination mechanisms and changes in associated vegetation are important in the determining the dispersal of Proteaceaous pollen. By understanding how the vegetation has changed and developed in south-western Australia, present vegetation can be managed to include intra-specific variation and ensure the majority of species are conserved for present and future generations to enjoy.
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Evans, Nicola S. "An investigation of the Holocene pollen record from the Grey Islands, Newfoundland /." 2002.

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Luly, Jonathan Gregory. "A pollen analytical investigation of Holocene palaeoenvironments at Lake Tyrrell, semi-arid Northwestern Victoria, Australia." Phd thesis, 1990. http://hdl.handle.net/1885/110282.

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This thesis presents a pollen analytical reconstruction of mallee vegetation history in the vicinity of Lake Tyrrell, a large active salt lake in semi-arid northwestern Victoria. The project combined studies of the modern pollen rain, pollen depositional processes and sedimentological characteristics of lake deposits to provide an analytical framework appropriate to the interpretation of fossil pollen spectra from the novel salt lake setting. Pollen trapping in northwestern Victoria and western New South Wales indicates that the characteristic plant communities of semi-arid southeastern Australia can be identified from the pollen spectra they produce. Mallee heath communities produce spectra containing a diverse array of heathland taxa with limited pollen dispersal capacities, including Banksia, Baeckea behrii, Cryptandra and Calytrix tetragona. Mallee heaths also produce large amounts of Calli tris pollen but can be distinguished from Callitris woodland by the regular presence of pollen from restricted heathland taxa. Pollen spectra from chenopod shrublands are characterised by overwhelming dominance by Chenopodiaceae pollen. Other halophytic taxa often represented include Selenothamnus and Disphyma. Riverine forests produce pollen spectra dominated by Eucalyptus Muehlenbeckia cunninghamii and Amyema pollen occur commonly. It may be possible to identify pollen of Eucalyptus camaldulensis in fossil assemblages allowing this community to be more clearly delineated in the fossil record. Mallee communities can be distinguished from eucalypt dominated communities in moister areas by producing pollen spectra containing relatively high percentages of chenopod pollen and low percentages of grass pollen. Eucalypt woodlands in areas receiving more than 400 mm mean annual rainfall produce pollen spectra containing appreciable quantities of Callitris pollen. No relationship could be discerned between pollen production and rainfall in this study. Pollen trapping at Lake Tyrrell suggests that the majority of pollen arriving at the lake surface is wind borne. Few are washed from the lake margin or imported down Tyrrell Creek. This contrasts strongly with the situation in humid areas where pollen washed from the catchment or carried in creeks are a significant part of a lakes pollen budget. Pollen reaching the surface of Lake Tyrrell are rapidly redistributed and are preferentially deposited in areas marginal to the persistent salt crust. Maximum pollen concentrations occur on relatively high parts of the lake bed, again contrasting strongly with models derived from permanently wet lakes where maximum deposition of pollen occurs in the deepest parts of the basin. The sediments of Lake Tyrrell record a history of hydrological change extending to approximately 10,000 BP. Between 10,000 BP and 6600 BP water in Lake Tyrrell was shallow, saline and probably ephemeral. Water depths and the frequency I duration of flooding were most likely similar to those experienced today but there was no persistent salt crust. Between 6600 BP and 2200 BP the lake was a permanent though fluctuating waterbody. The lake waters were saline throughout this period. Water balance calculations suggest average rainfall in the lake catchment would have been approximately 2.6 times modern levels between 6600 BP and 2200 BP. The lake was dry between 2200 BP and 800 BP. The local groundwater table fell below the lake bed. There was no salt crust until about 800 BP when rainfall increased slightly allowing local watertables to rise and modem salt lake conditions to develop. Changes in vegetation around Lake Tyrrell occur in association with changes in rainfall. Between 10,000 BP and 6600 BP Lake Tyrrell was surrounded by open woodland dominated by Allocasuarina Eucalyptus and Callitris were probably present in limited areas. At 6600 BP mallee communities began to dominate the landscape. It is likely the appearance of mallee reflects the arrival of mallee eucalypts spreading from refugial areas occupied during the last glacial maximum. Callitris patches were a prominent element of the regional vegetation during this the wettest interval in the Holocene record. They appear little affected by the active fire regime of the times. Between 2200 BP and 800 BP mallee persisted and Allocasuarina experienced a modest expansion. Callitris declined drastically. The dense mallee vegetation which surrounded the lake at the time of European settlment was established after 800 BP. The history of Holocene environmental change identified from Lake Tyrrell provides a possible explanation for the patterns of archaeological site distribution observed in the Mallee Districts of northwestern Victoria.
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Books on the topic "Paleobotany – Holocene"

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Odgaard, Bent Vad. The Holocene vegetation history of Northern West Jutland, Denmark. Copenhagen: Council for Nordic Publications in Botany, 1994.

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Fredskild, Bent. The holocene vegetational development of Tugtuligssuaq and Qeqertat, Northwest Greenland. Copenhagen: Nyt Nordisk Forlag, 1985.

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Marambat, Laurence. Paysages de la façade atlantique girondine et de la Saintonge au post-glaciaire: L'empreinte de l'homme. Paris: CNRS éditions, 1995.

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Vermoere, M. Holocene vegetation history in the territory of Sagalassos (southwest Turkey): A palynological approach. Turnhout: Brepols, 2003.

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Hoek, W. Z. Palaeogeography of lateglacial vegetations: Aspects of lateglacial and early Holocene vegetation, abiotic landscape, and climate in the Netherlands. Utrecht: Koninklijk Nederlands Aardrijkskundig Genootschap, Interuniversitair Centrum voor Geo-ecologisch Onderzoek, Faculteit der Aardwetenschappen Vrije Universiteit Amsterdam, 1997.

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Delusin, Irene. The Holocene pollen stratigraphy of Lake Ladoga and the vegetational history of its surroundings. Helsinki: Suomalainen Tiedeakatemia, 1991.

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Mildenhall, D. C. Palynological reconnaissance of Early Cretaceous to Holocene sediments, Chatham Islands, New Zealand. Lower Hutt, N.Z: Institute of Geological & Nuclear Sciences Ltd, 1994.

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Bowdery, Doreen. Phytolith analysis applied to Pleistocene-Holocene archaeological sites in the Australian arid zone. Oxford: J. & E. Hedges, 1998.

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Burga, Conradin A. Vegetation und Klima der Schweiz seit dem jüngeren Eiszeitalter =: Vegetation and climate history in Switzerland during the later Pleistocene and Holocene. Thun: Ott, 1998.

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Mehringer, Peter J. Late Holocene environments on the northern periphery of the Great Basin : final report. Pullman, Wash: Departments of Anthropology and Geology, Washington State University, 1987.

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