John Vallentyne (38 results)

Condition: like_new. Book is in like new condition with minimal signs of wear. Pages are clean and free from notes or highlighting. Dust cover is intact. May not contain miscellaneous items toys, dvds, etc. . We offer 100% money back guarantee and 24 7 customer service.

Soft cover. Condition: Good. Good condition. Some edgewear. Soiling to outside page edges with one small brown spot on bottom outside page edges. Previous owner name on inside front cover. No other writing or marking. Not Ex-Library.

Condition: Good. Revised and Expanded. Former library copy. Pages intact with minimal writing/highlighting. The binding may be loose and creased. Dust jackets/supplements are not included. Includes library markings. Stock photo provided. Product includes identifying sticker. Better World Books: Buy Books. Do Good.…

Paperback. Condition: Very Good. No Jacket. May have limited writing in cover pages. Pages are unmarked. ~ ThriftBooks: Read More, Spend Less.

Trade Paperback Original. Condition: Fair. First Edition. Top of free front endpaper has former ownership signature of a Harvard University biologist, who added yellow highlighting, pen underlining and/or other marks to 58 p., all of which are still legible; binding has wear. 186 p. [otob: 27].

Paperback. Condition: Good. Light wear on cover edge and corners. Light soiling on page edge.; 334 pages.

paperback. Condition: Good. Good - Bumped and creased book with tears to the extremities, but not affecting the text block, may have remainder mark or previous owner's name - GOOD PAPERBACK Standard-sized.

Soft cover. Condition: Very Good. Photo is the book you will receive. In very nice condition with nominal wear, a tight binding and pristine text. Library book with usual stamps and labels.

Hardcover. Condition: Very Good. Good (Protective cover). tight binding; clean pages; slight tearing around dust jacket edges Size: 4to - over 9¾" - 12" tall.

Condition: New.

Trade Paperback. Condition: Acceptable. Prompt Shipment, shipped in Boxes, Tracking PROVIDEDAcceptable Trade Paperback, 154 pages, Tips bumped, Spine head and heal bumped and nicked, Nicks along spine edge, Ink writing from previous owner on the inside of front cover, Prompt shipping with tracking.

Condition: New.

Condition: As New. Unread book in perfect condition.

Hardcover. Condition: Fine. Dust Jacket Condition: Very Good. Fine condition hard cover book with Very Good condition dust jacket. Slightest toning and smudging to text block edges. Dust Jacket has slight shelf wear and bumping. Several rips to jacket edges, most no larger than 1/4 inch. 3/4 inch rip to top of rear cover, 1 inch rip to top of front cover, both taped. 1/2 inch rip to bottom of front cover. Dust jacket protected by mylar. Dust jacket unclipped, unless described as such. All of our books are individually inspected and described. Never X-library unless specifically described as such.…

Soft cover. Condition: Very Good. 334 pp, index. Very light corner wear.

Hardcover. Condition: Very Good. 196 pages. 19.5 cm. Couverture cartonnée d'origine. Frontispice (photo coul.). Illustrations (tableaux et dessins n/b). Glossaire. Appendice. Lectures supplémentaire. Traduction de l'édition anglaise parue en 1974 sous le titre "The Algal bowl: lakes and man" publiée en 1974. Très bon.…

Hardcover. Condition: Fine. Dust Jacket Condition: Very Good. Color Illustrations; 9.13 X 6.57 X 1.11 inches; 288 pages; Oblong shaped hard cover has a dark blue cover with gold lettering on front spine. Slight bumping to boards. Signed by both authors on page facing title page, along with an inscription to Al Gore [Vice President of the USA, 1993-2001]. Pages are clean and tight. Lushly illustrated with 140 color photographs and a color map the Lake Superior Watershed. DJ has 1" closed tear at top, light sunning, rubbing; back cover has more rubbing/scuffing; in a mylar cover. " The photographs and quality presentation (on recycled chlorine-free paper with soy inks) make this a splendid "coffee table book"--but read it. What sets this book apart from other "picture books" of the region is its depth and breadth of information, supported by careful research. The most comprehensive book on the Lake Superior ecosystem to date, Lake Superior: Story and Spirit reflects not only the beauty but also the interdependent and cooperative creativity of the natural world. The Mahans have detailed the life and spirit of an immense, interconnected, complex and vital ecosystem. By exploring universal themes and understandings that apply to the entire planet, they extend the scope and relevance of this book far beyond this freshwater sea". The beautiful Upper Peninsula [UP] of Michigan is splendidly crowned by this glorious, truly great lake. Oversized, 4#. ; Signed by All Authors.…

Condition: As New. Unread book in perfect condition.

Condition: As New. Unread book in perfect condition.

Condition: very good. no dustjacket. 8vo pp.334. book.

Condition: New.

Condition: Nuevo. 213 Descripción:España 1978.Rústica.180 pag.Precintado original.SINOPSIS:Obra para no especialistas que trata de los lagos y de cómo éstos son afectados por los nutrientes derivados de las actividades humanas (eutrofización debida al hombre). Los nueve capítulos tratan de los siguientes temas: la clasificación biológica de los lagos, el papel de los compuestos de fósforo y nitrógeno en la estimulación del crecimiento de las algas y de las hierbas acuáticas; la historia de la eutrofización debida al hombre; cómo es regulada la circulación vertical del agua en los lagos por la acción del sol y del viento; el fósforo en la biosfera; métodos para el control de la eutrofización debida al hombre, etc. Mientras el tema central del libro es que el fósforo es la clave para el control de la eutrofización debida al hombre, un análisis de las causas últimas muestra la perentoria necesidad de controlar el crecimiento demográfico.…

Condition: New. pp. 344 Illus., Maps.

Condition: New.

Condition: Nuevo. Introducci¢n a la limnologa editado por Ediciones omega.

Paperback. Condition: New. In 1974, John R. Vallentyne predicted that by the year 2000 we would be living in an environmental disaster he called the Algal Bowl. Just as the Dust Bowl of the 1930s was created by misusing western farmland, he forecast that the continuing miuse of lakes could only lead to water degradation. In the first edition of The Algal Bowl: Lakes and Man, he explained how the biology of lakes is changed by an overload of nutrients - a process known as eutrophication. Vallentyne demonstrated that human activity was the primary cause of eutrophicationand therefore responsible for the explosive growth of algae. His efforts helped move policy makers in North America to action regarding the dangers of phosphates in fresh water. Witnessing the escalation of eutrophication, Vallentyne invited his colleague, David W. Schindler, to substantially revise this groundbreaking book. Along with updates to the scientific data, Schindler added five chapters of new research, including the effect of eutrophication on ocean estuaries. Two of North America's leading water scientists joined forces to explain the science and strategies that are essential to understanding and protecting whole water systems from eutrophication and massive algae blooms. Scientists, opinion leaders, policy makers, and concerned citizens will find this fully revised and expanded second edition an unambiguous diagnosis and prescription for change.…

Condition: New. pp. 344, Maps.

Condition: As New. Unread book in perfect condition.

Condition: New.

Condition: New. Examines the effect of eutrophication on ocean estuaries. This book explains the science and strategies that are essential to understanding and protecting whole water systems from eutrophication and massive algae blooms. It is suitable for scientists, opinion leaders, policy makers, and concerned citizens. Num Pages: 348 pages, Colour plate section, photographs, maps, figures. BIC Classification: PSPF; PSTV; RNC. Category: (P) Professional & Vocational; (UP) Postgraduate, Research & Scholarly; (UU) Undergraduate. Dimension: 228 x 165 x 23. Weight in Grams: 558. . 2008. Paperback. . . . . …