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Author: Claude E. Boyd
Publisher: Springer Science & Business Media
ISBN: 1461517850
Category : Science
Languages : en
Pages : 366
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Book Description
Aquaculture pond managers measure water-quality variables and attempt to maintain them within optimal ranges for shrimp and fish, but surprisingly little attention is paid to pond soil condition. Soil-water interactions can strongly impact water quality, and soil factors should be considered in aquaculture pond management. The importance of soils in pond management will be illustrated with an example from pond fertilization and another from aeration. Pond fertilization may not produce phytoplankton blooms in acidic ponds. Total alkalinity is too low to provide adequate carbon dioxide for photosynthesis, and acidic soils adsorb phosphate added in fertilizer before phytoplankton can use it. Agricultural lime stone application can raise total alkalinity and neutralize soil acidity. The amount of limestone necessary to cause these changes in a pond depends on the base unsaturation and exchange acidity of the bottom soil. Two ponds with the same total alkalinity and soil pH may require vastly different quantities of limestone because they differ in exchange acidity. Aeration enhances dissolved oxygen concentrations in pond water and permits greater feed inputs to enhance fish or shrimp production. As feeding rates are raised, organic matter accumulates in pond soils. In ponds with very high feeding rates, aeration may supply enough dissolved oxygen in the water column for fish or shrimp, but it may be impossible to maintain aerobic conditions in the surface layers of pond soil. Toxic metabolites produced by microorganisms in anaerobic soils may enter the pond water and harm fish or shrimp.
Author: Claude E. Boyd
Publisher: Springer Science & Business Media
ISBN: 1461517850
Category : Science
Languages : en
Pages : 366
Get Book Here
Book Description
Aquaculture pond managers measure water-quality variables and attempt to maintain them within optimal ranges for shrimp and fish, but surprisingly little attention is paid to pond soil condition. Soil-water interactions can strongly impact water quality, and soil factors should be considered in aquaculture pond management. The importance of soils in pond management will be illustrated with an example from pond fertilization and another from aeration. Pond fertilization may not produce phytoplankton blooms in acidic ponds. Total alkalinity is too low to provide adequate carbon dioxide for photosynthesis, and acidic soils adsorb phosphate added in fertilizer before phytoplankton can use it. Agricultural lime stone application can raise total alkalinity and neutralize soil acidity. The amount of limestone necessary to cause these changes in a pond depends on the base unsaturation and exchange acidity of the bottom soil. Two ponds with the same total alkalinity and soil pH may require vastly different quantities of limestone because they differ in exchange acidity. Aeration enhances dissolved oxygen concentrations in pond water and permits greater feed inputs to enhance fish or shrimp production. As feeding rates are raised, organic matter accumulates in pond soils. In ponds with very high feeding rates, aeration may supply enough dissolved oxygen in the water column for fish or shrimp, but it may be impossible to maintain aerobic conditions in the surface layers of pond soil. Toxic metabolites produced by microorganisms in anaerobic soils may enter the pond water and harm fish or shrimp.
Author: Simon Small
Publisher: John Hunt Publishing
ISBN: 1780992076
Category : Religion
Languages : en
Pages : 78
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Book Description
This is a book about knowing God. It is for those for whom just believing (or not believing) is no longer enough. Through personal experience, anecdote and story, a priest shares an ancient, but neglected aspect of Christian prayer. Contemplation takes us into the depths of the present moment, the only reality there has ever been and so the only place where God can be found. It takes us at different times into mystical oneness with the All, into profound self-knowledge and reveals love in the midst of the world.
Author: Cocca
Publisher: Carson-Dellosa Publishing
ISBN: 1731615485
Category : Juvenile Nonfiction
Languages : en
Pages : 36
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Book Description
Life in a pond is exciting. Birds, bugs, and shrews skitter across the surface. Turtles and fish zip along under the water’s surface. Beavers, herons, and others make themselves at home by the pond’s edge. In this book, readers in grades 3-5 will discover how these animals survive and thrive in freshwater pond biomes around the world. This NGSS-aligned series is packed with interesting facts and vivid photos that introduce readers to a variety of land and water animals. Each book includes a glossary, comprehension questions, and an activity for home or the classroom.
Author: Gordon Morrison
Publisher: Houghton Mifflin Harcourt
ISBN: 9780618102716
Category : Juvenile Nonfiction
Languages : en
Pages : 36
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Book Description
Observes how a glacial pond and the abundance of plants and animals that draw life from it change over the course of a year.
Author: Jim and Joel Ashton
Publisher:
ISBN: 9780241435816
Category :
Languages : en
Pages : 192
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Book Description
"It's up to every single one of us to do our bit for wildlife, however small our gardens, and The Butterfly Brothers know just how that can be achieved." Alan Titchmarsh Join the rewilding movement and share your outdoor space with nature. We all have the potential to make the world a little greener. Wild Your Garden, written by Jim and Joel Ashton (aka "The Butterfly Brothers"), shows you how to create a garden that can help boost local biodiversity. Transform a paved-over yard into a lush oasis, create refuges to welcome and support native species, or turn a high-maintenance lawn into a nectar-rich mini-meadow to attract bees and butterflies. You don't need specialist knowledge or acres of land. If you have any outdoor space, you can make a difference to local wildlife, and reduce your carbon footprint, too. "Wildlife gardening is one of the most important things you can do as an individual for increasing biodiversity and mitigating the effects of climate change. From digging a pond to planting a native hedge, the Butterfly Brothers can help you every step of the way." Kate Bradbury
Author: Kate Messner
Publisher: Chronicle Books
ISBN: 1452150850
Category : Juvenile Nonfiction
Languages : en
Pages : 48
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Book Description
In this gorgeous companion to the acclaimed Over and Under the Snow and Up in the Garden and Down in the Dirt, Kate Messner and Christopher Silas Neal bring to life a secret underwater world. In this book, readers will discover the plants and animals that make up the rich, interconnected ecosystem of a mountain pond. Over the pond, the water is a mirror, reflecting the sky. But under the pond is a hidden world of minnows darting, beavers diving, tadpoles growing. These and many other secrets are waiting to be discovered...over and under the pond.
Author: Rudolph A. Rosen
Publisher: Texas A&M University Press
ISBN: 1623491932
Category : Science
Languages : en
Pages : 218
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Book Description
This classroom resource provides clear, concise scientific information in an understandable and enjoyable way about water and aquatic life. Spanning the hydrologic cycle from rain to watersheds, aquifers to springs, rivers to estuaries, ample illustrations promote understanding of important concepts and clarify major ideas. Aquatic science is covered comprehensively, with relevant principles of chemistry, physics, geology, geography, ecology, and biology included throughout the text. Emphasizing water sustainability and conservation, the book tells us what we can do personally to conserve for the future and presents job and volunteer opportunities in the hope that some students will pursue careers in aquatic science. Texas Aquatic Science, originally developed as part of a multi-faceted education project for middle and high school students, can also be used at the college level for non-science majors, in the home-school environment, and by anyone who educates kids about nature and water. To learn more about The Meadows Center for Water and the Environment, sponsors of this book's series, please click here.
Author: Helen Nash
Publisher: Sterling Publishing Company Incorporated
ISBN: 9780806976815
Category : Gardening
Languages : en
Pages : 160
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Book Description
“Warm and wonderful advice.”—Ponds Magazine. “A pond’s tranquil surface of lily pads and lotus blossoms can conceal a surprisingly fecund realm teeming with fish, frogs, turtles, and other aquatic creatures—if you know what to do. Nash’s encyclopedic guide is geared to maximizing your success.”—Booklist.
Author: Gilbert Waldbauer
Publisher: Harvard University Press
ISBN: 9780674022119
Category : Nature
Languages : en
Pages : 318
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Book Description
A water strider darts across a pond, its feet dimpling the surface tension; a giant water bug dives below, carrying his mate’s eggs on his back; hidden among plant roots on the silty bottom, a dragonfly larva stalks unwary minnows. Barely skimming the surface, in the air above the pond, swarm mayflies with diaphanous wings. Take this walk around the pond with Gilbert Waldbauer and discover the most amazingly diverse inhabitants of the freshwater world. In his hallmark companionable style, Waldbauer introduces us to the aquatic insects that have colonized ponds, lakes, streams, and rivers, especially those in North America. Along the way we learn about the diverse forms these arthropods take, as well as their remarkable modes of life—how they have radiated into every imaginable niche in the water environment, and how they cope with the challenges such an environment poses to respiration, vision, thermoregulation, and reproduction. We encounter the caddis fly larva building its protective case and camouflaging it with stream detritus; green darner dragonflies mating midair in an acrobatic wheel formation; ants that have adapted to the tiny water environment within a pitcher plant; and insects whose adaptations to the aquatic lifestyle are furnishing biomaterials engineers with ideas for future applications in industry and consumer goods. While learning about the evolution, natural history, and ecology of these insects, readers also discover more than a little about the scientists who study them.
Author: George K. Reid
Publisher: Golden Guides from St. Martin's Press
ISBN: 146686480X
Category : Nature
Languages : en
Pages : 160
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Book Description
This eBook is best viewed on a color device. This guide describes and illustrates, in full color, the plants and animals that live in or near ponds, lakes, streams, and wetlands. It includes surface-dwelling creatures as well as those of open water, the bottom, and the shore and tells how various animals and plants live together in a community. Plus suggestions for: Where and when to look Observing and collecting specimens Making exciting discoveries
