Geochemistry And Isotopic Composition Of Sediment Cores To Understand The Lithological And Anthropogenic Controls On Eutrophication In The New River Estuary Southland New Zealand
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Geochemistry And Isotopic Composition Of Sediment Cores To Understand The Lithological And Anthropogenic Controls On Eutrophication In The New River Estuary Southland New Zealand
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Author : Danielle J. Brown
language : en
Publisher:
Release Date : 2019
Geochemistry And Isotopic Composition Of Sediment Cores To Understand The Lithological And Anthropogenic Controls On Eutrophication In The New River Estuary Southland New Zealand written by Danielle J. Brown and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with categories.
The New River Estuary (NRE) in Southland, New Zealand is highly eutrophic and has rapidly declining ecosystem health. Historic estuarine reclamation, extensive catchment drainage, and waterway modification have increased the susceptibility of the estuary to degradation. In addition, more recent (post-1984) agricultural intensification and a shift in primary land use from sheep to dairy farming have increased the fine-sediment and associated pollutant loss to the catchment. Extensive macroalgae cover in the NRE reflects the ecosystem's response to eutrophication, where opportunistic species outcompete native plants in the nutrientenriched environment. Three sediment cores from the primary depositional areas in the NRE, the Waihopai Arm and Daffodil Bay, were geochemically characterized, including stable and radiogenic isotopes, to assess changes in the rate of sediment, nutrient, and heavy metal accumulation. The sedimentation rate in the upper Waihopai Arm has increased from 7.3-13 mm yr-1 before 1935 to a very high rate of 20-22 mm yr-1 from 2009-2017. The lower Waihopai Arm and Daffodil Bay have increased to a high rate of sedimentation in the last decade from 5.9 to 17.5 mm yr-1 and 5.5-7 to 10.3 mm yr-1 , respectively. Phosphorus and trace metal concentrations in the bioavailable sediment fraction, which includes Fe- and Mn-oxides, sulfide, organic, or surface-adsorbed phases, have increased up to three and eight times higher than geogenic levels, respectively, which heightens their vulnerability to mobilization in response to changes in salinity and redox state. Increasing heavy metals and decreasing calcium loads, coupled with carbon- and nitrogen-isotopic values trending toward a terrestrial signature ([...] 13C = -28[...], [...] 15N = 8[...]), delineates a transition in sediment source from marine-dominated (pre-1935) to terrestrial-dominated (post-1985). The composition of fallout radionuclides also indicates a change in the delivery of terrestrial sediment from channel bank collapse and subsoil erosion (pre-1965) to sheet erosion of surface, likely pasture, soils (post-1997). This study highlights the importance of differentiating the natural sediment signatures from the anthropogenic sources of pollutants to assess the proportion of low-quality sediment (i.e., high nutrient and/or metal concentration) for which a targeted mitigation approach should be applied.
Sisters Super Creeps And Slushy Gushy Love Songs
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Author : Karen McCombie
language : en
Publisher:
Release Date : 2011
Sisters Super Creeps And Slushy Gushy Love Songs written by Karen McCombie and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Ally (Fictitious character : McCombie) categories.
Ally knows her super-efficient big sis Linn finds their chaotic family a bit ... exasperating. But when Linn falls for Q, the tearaway lead singer in a local band, all her sensible ways go out of the window. Everyone else can see that Q's a creep, but does Ally have the courage to burst Linn's heart-shaped bubble?
Type Typo
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Author :
language : en
Publisher: Omair Nazir
Release Date :
Type Typo written by and has been published by Omair Nazir this book supported file pdf, txt, epub, kindle and other format this book has been release on with categories.
Dentists
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Author : Mary Meinking
language : en
Publisher: Raintree
Release Date : 2021-08-05
Dentists written by Mary Meinking and has been published by Raintree this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-08-05 with categories.
Open wide! Dentists care for people's teeth. Give readers the inside scoop on what it's like to be a dentist. Readers will learn what dentists do, the tools they use, and how people get this exciting job.
Ptolemy S Almagest
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Author : Ptolemy
language : en
Publisher: Princeton University Press
Release Date : 1998-11-08
Ptolemy S Almagest written by Ptolemy and has been published by Princeton University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998-11-08 with Science categories.
Ptolemy's Almagest is one of the most influential scientific works in history. A masterpiece of technical exposition, it was the basic textbook of astronomy for more than a thousand years, and still is the main source for our knowledge of ancient astronomy. This translation, based on the standard Greek text of Heiberg, makes the work accessible to English readers in an intelligible and reliable form. It contains numerous corrections derived from medieval Arabic translations and extensive footnotes that take account of the great progress in understanding the work made in this century, due to the discovery of Babylonian records and other researches. It is designed to stand by itself as an interpretation of the original, but it will also be useful as an aid to reading the Greek text.
Trichier
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Author : Alessandra Ceretto
language : en
Publisher: Lulu.com
Release Date :
Trichier written by Alessandra Ceretto and has been published by Lulu.com this book supported file pdf, txt, epub, kindle and other format this book has been release on with categories.
A Primer On Sediment Trace Element Chemistry
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Author : Arthur J. Horowitz
language : en
Publisher: CRC Press
Release Date : 1991-04-23
A Primer On Sediment Trace Element Chemistry written by Arthur J. Horowitz and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991-04-23 with Law categories.
This book provides a basic introduction to sediment-heavy metal interactions and how sediment chemical data can be used to address environmental questions and issues. It is designed to promote self-teaching and is written so that students and professionals with a minimum of formal training in the environmental sciences can understand it. The book addresses all of the major physical and chemical factors that control sediment-trace element chemistry, as well as sampling and sampling design, data manipulation, and data interpretation. Following in the steps of the successful first edition, which was used as a text for a three day short course for U.S. Geological Survey professionals interested in sediment trace chemistry and its application to water quality issues, A Primer on Sediment-Trace Element Chemistry, 2nd Edition is ideal for academics, geochemists, chemists, hydrologists, environmental lawyers, and water quality professionals needing a comprehensive introduction to this field.
Yvain
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Author : Chretien de Troyes
language : en
Publisher: Yale University Press
Release Date : 1987-09-10
Yvain written by Chretien de Troyes and has been published by Yale University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987-09-10 with Poetry categories.
The twelfth-century French poet Chrétien de Troyes is a major figure in European literature. His courtly romances fathered the Arthurian tradition and influenced countless other poets in England as well as on the continent. Yet because of the difficulty of capturing his swift-moving style in translation, English-speaking audiences are largely unfamiliar with the pleasures of reading his poems. Now, for the first time, an experienced translator of medieval verse who is himself a poet provides a translation of Chrétien’s major poem, Yvain, in verse that fully and satisfyingly captures the movement, the sense, and the spirit of the Old French original. Yvain is a courtly romance with a moral tenor; it is ironic and sometimes bawdy; the poetry is crisp and vivid. In addition, the psychological and the socio-historical perceptions of the poem are of profound literary and historical importance, for it evokes the emotions and the values of a flourishing, vibrant medieval past.
Fletcherism What It Is Or How I Became Young At Sixty
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Author : Horace Fletcher
language : en
Publisher: DigiCat
Release Date : 2022-06-02
Fletcherism What It Is Or How I Became Young At Sixty written by Horace Fletcher and has been published by DigiCat this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-06-02 with Fiction categories.
"Fletcherism: what it is: or, How I became young at sixty" by Horace fletcher is a fascinating book on nutrition and diet. The author here relates briefly the story of his regeneration, of how he rescued himself from the prospect of an early grave, and brought himself to his present splendid physical and mental condition. He tells of the discovery of his principles, which have helped millions of people to live better, happier, and healthier lives. The book is a good fit if you are concerned about health and diet.
Abc
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Author : Bonnie Zavell
language : en
Publisher: Honey Bear Books
Release Date : 1992
Abc written by Bonnie Zavell and has been published by Honey Bear Books this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Juvenile Nonfiction categories.
ABC's, First Words, Numbers and Shapes, Colors and Opposites including a special note to parents. Children will enjoy hours of learning fun in each 32-page bi-lingual book. All four books are designed specifically to teach and reinforce basic concepts for preschool through early elementary school children.