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Quaternary Pollen Records Of Environmental And Vegetation Change From Lakes Kai Iwi And Kanono Two Northland Dune Lakes
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Book Synopsis Quaternary Pollen Records of Environmental and Vegetation Change from Lakes Kai Iwi and Kanono, Two Northland Dune Lakes by : Amber Ditchfield
Download or read book Quaternary Pollen Records of Environmental and Vegetation Change from Lakes Kai Iwi and Kanono, Two Northland Dune Lakes written by Amber Ditchfield and published by . This book was released on 2016 with total page 155 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Quaternary Vegetation Dynamics by : Jürgen Runge
Download or read book Quaternary Vegetation Dynamics written by Jürgen Runge and published by CRC Press. This book was released on 2021-11-28 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book celebrates the relaunch of the African Pollen Database, presents state-of-the-art of modern and ancient pollen data from sub-Saharan Africa, and promotes Open Access science. Pollen grains are powerful tools for the study of past vegetation dynamics because they preserve well within sedimentary deposits and have a huge diversity in ornamentation that allows different taxa to be determined. The reconstruction of past vegetation from the examination of ancient pollen records thus can be used to characterize the nature of past landscapes (e.g. abundance of forests vs. grasslands), provide insights into changes in biodiversity, and gain empirical evidence of vegetation response to climatic change and human activity. In this, the 35th Volume of "Palaeoecology of Africa", we bring together new data and extensive synthetic reviews to provide novel insights into the relationships between human evolution, human activity, climate change and vegetation dynamics during the Quaternary, the last 2.6 million years. Current and ongoing climate and land-use change is exerting pressure on modern vegetation formations and threatening the livelihoods and wellbeing of many peoples in Africa. In this book the focus is on the Quaternary because it is during this geological period that the modern vegetation formations developed into their current configurations against a backdrop of high magnitude global climate change (glacial-interglacial cycles), human evolution, and a growing human land-use footprint. In this book the latest information is presented and collated from around the African continent to parameterize past vegetation states, identify the drivers of vegetation change, and assess the vegetation resilience to change. To achieve this research from two broad themes are covered: (i) the present is the key to the past (i.e. studies which improve our understanding of modern environments so that we can better interpret evidence from the past), and (ii) the past is the key to the future (i.e. studies which unlock information on how and why vegetation changed in the past so one can better anticipate trajectories of future change). This Open Access book will provide a strong foundation for future research exploring past ecological, environmental and climatic change within Africa and the surrounding islands. The book is organized regionally (covering western, eastern, central, and southern Africa) and it contains specialized articles focused on particular topics (such as modern pollen-vegetation relationships and fire as a driver of vegetation change), as well as regional and pan-African syntheses drawing together decades of research to assess key scientific questions (including the role of climate in driving vegetation change and the role of vegetation change in human evolution). These articles will be useful to students and teachers from high school to the highest level of university who are interested in the origins and dynamics of vegetation in Africa. Furthermore, it is also meant to provide societally relevant information that can act as an inspiration for the development of sustainable management practices for the future.
Book Synopsis Pollen-based Climate Reconstruction Techniques for Late Quaternary Studies by : Manuel Chevalier
Download or read book Pollen-based Climate Reconstruction Techniques for Late Quaternary Studies written by Manuel Chevalier and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Fossil pollen records are well-established indicators of past vegetation changes. The prevalence of pollen across environmental settings including lakes, wetlands, and marine sediments, has made palynology one of the most ubiquitous and valuable tools for studying past environmental and climatic change globally for decades. A complementary research focus has been the development of statistical techniques to derive quantitative estimates of climatic conditions from pollen assemblages. This paper reviews the most commonly used statistical techniques and their rationale and seeks to provide a resource to facilitate their inclusion in more palaeoclimatic research. To this end, we first address the fundamental aspects of fossil pollen data that should be considered when undertaking pollen-based climate reconstructions. We then introduce the range of techniques currently available, the history of their development, and the situations in which they can be best employed. We review the literature on how to define robust calibration datasets, produce high-quality reconstructions, and evaluate climate reconstructions, and suggest methods and products that could be developed to facilitate accessibility and global usability. To continue to foster the development and inclusion of pollen climate reconstruction methods, we promote the development of reporting standards. When established, such standards should 1) enable broader application of climate reconstruction techniques, especially in regions where such methods are currently underused, and 2) enable the evaluation and reproduction of individual reconstructions, structuring them for the evolving open-science era, and optimising the use of fossil pollen data as a vital means for the study of past environmental and climatic variability. We also strongly encourage developers and users of palaeoclimate reconstruction methodologies to make associated programming code publicly available, which will further help disseminate these techniques to interested communities
Book Synopsis A Paleo-environmental Reconstruction of the Sedimentation, Productivity, Hydrology and Geochemistry of the Pouto Dune Lakes, Northland by : Brett Clive Rip
Download or read book A Paleo-environmental Reconstruction of the Sedimentation, Productivity, Hydrology and Geochemistry of the Pouto Dune Lakes, Northland written by Brett Clive Rip and published by . This book was released on 2016 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: The dune lakes on the Pouto Peninsula, Northland, New Zealand are all showing signs of impact through catchment land-use change, with water quality of most lakes in a state of degradation. Most of these lakes are situated in catchments dominated by exotic pine forest and pasture and are observed with high sedimentation and having high nutrient levels with water quality ranging between mesotrophic and eutrophic. Sediment cores from three dune lakes displaying signs of water quality deterioration such as increased algae, were analysed using paleolimnological approaches to broaden our understanding of how shallow dune lakes function in New Zealand with respect to the hydrological, geochemical and biological processes that alter in response to resource and agricultural land-use change. A multi-proxy analysis of the biological productivity, water quality and catchment erosion of Lakes Rotokawau, Humuhumu and Rototuna was carried out to reconstruct the paleoenvironment back to a pre-human state. A reliable chronology was determined from AMS 14C and 210Pb dating of the sediments, with sediment stratigraphy and composition, organic matter and sediment elemental geochemistry and carbon and nitrogen isotope geochemistry used to evaluate changes in sediment sources and lake conditions. The diatom sedimentary record from Lakes Rotokawau and Humuhumu were used to determine the algal productivity and trophic states of the lakes. The sediment and organic matter geochemistry of all three lakes reflect extensive fluctuations in water levels from the mid-Holocene, with lowering of water levels and wind induced re-suspension of sediments a major cause for increased turbid conditions and increased algal productivity. The first sign of land use changes and catchment disturbance is erosion, with sand and nutrient influx increasing in the upper sediments of Lake Rototuna, specifically in the southern basin of the lake which is dominated by pasture with livestock access to the water's edge. Lakes Humuhumu and Rotokawau display similar sand influx in the upper sediments, first observed before ca. 1929 AD in Lake Humuhumu and after ca. 1968 AD in Lake Rotokawau. The diatom records for both these lakes display decreasing water quality from oligotrophic conditions prior to human impact of the two lakes to mesotrophic conditions after catchment disturbance had occurred.
Book Synopsis Key to the Quaternary Pollen and Spores of the Great Lakes Region by : John H. McAndrews
Download or read book Key to the Quaternary Pollen and Spores of the Great Lakes Region written by John H. McAndrews and published by . This book was released on 1973 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Late-Holocene Pollen Data from Lakes with Varved Sediments in Northeastern and Northcentral United States by :
Download or read book Late-Holocene Pollen Data from Lakes with Varved Sediments in Northeastern and Northcentral United States written by and published by . This book was released on 1985 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Late Quaternary pollen records from Oil Lake and Feniak Lake, Alaska, U.S.A by : W.R. EISNER
Download or read book Late Quaternary pollen records from Oil Lake and Feniak Lake, Alaska, U.S.A written by W.R. EISNER and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Paleo-environmental Reconstruction of the Sedimentation, Hydrology and Geochemistry of the Poutō Dune Lakes, Northland by : Rachael Mercer
Download or read book A Paleo-environmental Reconstruction of the Sedimentation, Hydrology and Geochemistry of the Poutō Dune Lakes, Northland written by Rachael Mercer and published by . This book was released on 2019 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: The dune lakes on the Poutō Peninsula, Northland, New Zealand are all showing signs of impact due to anthropogenic catchment land-use change, with the water quality of most lakes in a state of degradation. Most of these lakes are situated in catchments dominated by exotic pine forest or pasture and are observed to have high sedimentation rates and nutrient levels with water quality ranging from mesotrophic to supertrophic. Eight sediment cores from four dune lakes displaying signs of water quality deterioration were examined using paleolimnological approaches to broaden the understanding of how shallow dune lakes function in New Zealand with respect to sedimentation, hydrological and geochemical processes that alter in response to anthropogenic land-use change. A multi-proxy analysis of the catchment erosion, water quality and biological productivity of Lakes Kahuparere, Mokeno, Roto-otuauru and Waingata was undertaken to reconstruct the paleoenvironment to a pre-human state. A reliable chronology was determined from AMS14C and 210Pb dating of the sediments, with sediment stratigraphy, composition, index properties and elemental geochemistry used to examine changes in the sediment sources and lake conditions. The sedimentary indices and geochemistry of all four lakes reflect high levels of variability since the early to mid Holocene, with periods of fluctuating water levels, catchment erosion, biological productivity present in the pre-human lake condition. However, significant changes in the lake condition since European settlement has occurred. The first sign of land-use change is catchment disturbance through erosion causing large influxes of sand and nutrient loading, as demonstrated in the upper sediments of Lake Kahuparere (ca. AD 1943 to present), Mokeno, Roto-otuauru (ca. AD 1888 to present) and Waingata. Lakes Kahuparere, Mokeno and Roto-otuauru all show signs of lake condition change due to the cultivation of exotic Pinus on the Poutō Peninsula (ca. AD 1968) as demonstrated by the increase in sand influxes after commencement while nutrient loading is predominately present in pasture-dominate catchments such as Lakes Roto-otuauru and Waingata.
Book Synopsis Pollen Analysis of Late-Quaternary Sediments from Two Lakes in the Southern Puget Lowland, Washington by : Dennis Mark Hibbert
Download or read book Pollen Analysis of Late-Quaternary Sediments from Two Lakes in the Southern Puget Lowland, Washington written by Dennis Mark Hibbert and published by . This book was released on 1979 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Two Late Quaternary Pollen Records from South-central Alaska by : P. M. Anderson
Download or read book Two Late Quaternary Pollen Records from South-central Alaska written by P. M. Anderson and published by . This book was released on 1994 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Key to the Quaternary Pollen and Spores of the Great Lakes Region by :
Download or read book Key to the Quaternary Pollen and Spores of the Great Lakes Region written by and published by . This book was released on 1973 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Two Post-glacial Pollen Records from Meyers Grade Marsh and Grass Lake, El Dorado Co., California by : Deborah Dorland
Download or read book Two Post-glacial Pollen Records from Meyers Grade Marsh and Grass Lake, El Dorado Co., California written by Deborah Dorland and published by . This book was released on 1981 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis New Techniques in Sediment Core Analysis by : R. G. Rothwell
Download or read book New Techniques in Sediment Core Analysis written by R. G. Rothwell and published by Geological Society of London. This book was released on 2006 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this volume, recent advances in analytical and logging technology and their application to the analysis of sediment cores are presented. Developments in providing access to core data and associated datasets, and advances in data mining technology in order to integrate and interpret new and legacy datasets within the wider context of seafloor studies are also discussed.
Book Synopsis The New Zealand Biodiversity Strategy by : New Zealand. Department of Conservation
Download or read book The New Zealand Biodiversity Strategy written by New Zealand. Department of Conservation and published by . This book was released on 2000 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: " ... The purpose of the Strategy is to establish a strategic framework for action, to conserve and sustainably use and manage New Zealand's biodiversity. The primary focus is on New Zealand's indigenous biodiversity. However, because of the value and economic importance of much of our introduced biodiversity, the conservation of the genetic resources of our important introduced species is also addressed."--Executive summary.
Book Synopsis Duty and Desire Book Club Edition by : Anju Gattani
Download or read book Duty and Desire Book Club Edition written by Anju Gattani and published by . This book was released on 2021-01-27 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: To uphold family honor and tradition, Sheetal Prasad is forced to forsake the man she loves and marry playboy millionaire Rakesh Dhanraj while the citizens of Raigun, India, watch in envy. On her wedding night, however, Sheetal quickly learns that the stranger she married is as cold as the marble floors of the Dhanraj mansion. Forced to smile at family members and cameras and pretend there's nothing wrong with her marriage, Sheetal begins to discover that the family she married into harbors secrets, lies and deceptions powerful enough to tear apart her world. With no one to rely on and no escape, Sheetal must ally with her husband in an attempt to protect her infant son from the tyranny of his family.sion.
Download or read book Yvain written by Chretien de Troyes and published by Yale University Press. This book was released on 1987-09-10 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: A twelfth-century poem by the creator of the Arthurian romance describes the courageous exploits and triumphs of a brave lord who tries to win back his deserted wife's love
Download or read book I Have a Dog written by Charlotte Lance and published by Allen & Unwin. This book was released on 2014-05-01 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: I have a dog. An inconvenient dog. When I wake up, my dog is inconvenient. When I'm getting dressed, my dog is inconvenient. And when I'm making tunnels, my dog is SUPER inconvenient. But sometimes, an inconvenient dog can be big and warm and cuddly. Sometimes, an inconvenient dog can be the most comforting friend in the whole wide world.
