Inorganic Nitrogen Uptake by Epilithic Periphyton Communities in Oligotrophic, Nitrogen Deficient Lakes PDF Download
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Author: John Edward Reuter
Publisher:
ISBN:
Category :
Languages : en
Pages : 476
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Book Description
Author: John Edward Reuter
Publisher:
ISBN:
Category :
Languages : en
Pages : 476
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Book Description
Author: L.V. Evans
Publisher: Elsevier
ISBN: 0080874878
Category : Science
Languages : en
Pages : 329
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Book Description
This book contains the proceedings of a symposium on freshwater and marine algal biofouling sponsored by the Phycological Society of America in conjunction with the American Institute of Biological Sciences (AIBS). The book brings together for the first time, a selection of contributions reflecting current research in this field. The book is primarily directed to researchers at all levels in the field of freshwater and marine algal biofouling, and is intended to provide the basis for the development of a greater awareness between the work of the two groups, to their mutual benefit. Knowledge of the common ground and underlying similarities should also be beneficial to workers in both fields. Each chapter is self-contained, with its own list of references etc., and several chapters are extensively illustrated with original high-quality photographs and micrographs. The volume is also indexed.
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Category : Tahoe, Lake, Watershed (Calif. and Nev.)
Languages : en
Pages : 754
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Book Description
Author: Brian A. Whitton
Publisher: Springer Science & Business Media
ISBN: 9400738552
Category : Science
Languages : en
Pages : 753
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Book Description
Cyanobacteria have existed for 3.5 billion years, yet they are still the most important photosynthetic organisms on the planet for cycling carbon and nitrogen. The ecosystems where they have key roles range from the warmer oceans to many Antarctic sites. They also include dense nuisance growths in nutrient-rich lakes and nitrogen-fixers which aid the fertility of rice-fields and many soils, especially the biological soil crusts of arid regions. Molecular biology has in recent years provided major advances in our understanding of cyanobacterial ecology. Perhaps for more than any other group of organisms, it is possible to see how the ecology, physiology, biochemistry, ultrastructure and molecular biology interact. This all helps to deal with practical problems such as the control of nuisance blooms and the use of cyanobacterial inocula to manage semi-desert soils. Large-scale culture of several organisms, especially "Spirulina" (Arthrospira), for health food and specialist products is increasingly being expanded for a much wider range of uses. In view of their probable contribution to past oil deposits, much attention is currently focused on their potential as a source of biofuel. Please visit http://extras.springer.com/ to view Extra Materials belonging to this volume. This book complements the highly successful Ecology of Cyanobacteria and integrates the discoveries of the past twelve years with the older literature.
Author:
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Category : Limnology
Languages : en
Pages : 636
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Author: International Association of Theoretical and Applied Limnology
Publisher:
ISBN:
Category : Fresh-water biology
Languages : en
Pages : 688
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Book Description
Author: Cathryn Lawrence Rhodes
Publisher:
ISBN:
Category : Cyanobacteria
Languages : en
Pages : 416
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Book Description
Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 472
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Book Description
Author:
Publisher:
ISBN:
Category : Ecology
Languages : en
Pages : 698
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Book Description
Indexes journal articles in ecology and environmental science. Nearly 700 journals are indexed in full or in part, and the database indexes literature published from 1982 to the present. Coverage includes habitats, food chains, erosion, land reclamation, resource and ecosystems management, modeling, climate, water resources, soil, and pollution.
Author: Gretchen Maria Gettel
Publisher:
ISBN:
Category :
Languages : en
Pages : 338
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Book Description
Biological nitrogen (N) fixation of atmospheric N2 by free-living cyanobacteria in aquatic environments is common, and in many ecosystems, it can account for a significant portion of the biologically available N inputs. Although N fixation can compensate for N limitation, N limitation is maintained over relatively long time scales in many oligotrophic lake ecosystems. This dissertation examines the importance of benthic and pelagic N fixation in the N economies of oligotrophic lakes in arctic Alaska (Chapter 1) and examines nutrient, light, and grazer controls on benthic N fixation (Chapters 2 and 3). Both benthic and pelagic N fixation are prevalent in many lakes across the Alaskan arctic landscape, ranging from 0.12 - 1.5 mg N m-2 day-1 and 0 - 2.56 mg N m-2 day-1 respectively. Pelagic N fixation is much higher than has been reported elsewhere for oligotrophic lakes, and is more important than previously thought, comprising ~ 75% of N inputs to one lake. Benthic N fixation is lower than has been reported for other oligotrophic systems, and is roughly equivalent to N inputs from atmospheric deposition on an areal basis (~25 mg N m-2 year-1). On the landscape scale, N fixation in lakes roughly equal that in terrestrial ecosystems in this Arctic region. Benthic N fixation generally appears to have a saturating response to light availability within individual lakes, but light does not explain variation in benthic N fixation across lakes or years. Whole-lake fertilization and laboratory experiments indicate that P input stimulates benthic N fixation while N input suppresses N fixation when N is added either alone or in conjunction with P in Redfield proportion. Snails at ambient density cause a small decline in benthic N fixation (0.85 - 1.8% reduction over the summer). These patterns are corroborated in the landscape: lakes on younger surfaces have higher P, more snails, and higher rates of N-fixation than lakes on older surfaces. (Abstract).
