Suchergebnisse

"In this book, early fluent readers will learn about freshwater biomes, the important role they play on Earth, and the climate, geology, geography, and wildlife that define them. Bright, full-color photos and carefully leveled text will engage young readers as they learn more about the lakes, streams, and rivers that make up freshwater biomes. An infographic aids understanding, and an activity offers readers an opportunity to extend discovery. Children can learn more about freshwater biomes using our safe search engine that provides relevant, age-appropriate websites. Freshwater Biomes also features reading tips for teachers and parents, a table of contents, a glossary, and an index. Freshwater Biomes is part of Jump!'s Exploring Biomes series"--

"This beautiful book gives readers core information about freshwater biomes in rivers, lakes, wetlands, and estuaries. Find out where each kind is found, how animals and plants have adapted to life in and around water, who lives near these waterways, and how humans impact life there."--

Readers will learn about the two main types of freshwater biomes, which are standing (ponds and lakes) and flowing (streams and rivers). The text will focus on mainly on the importance of freshwater, as well as the plants and animals that inhabit it. Aligned to Common Core Standards and correlated to state standards. Abdo Kids is a division of ABDO

This volume in the Greenwood Guides to Biomes of the World: series covers the freshwater biomes that exist in wetlands, ponds and lakes, and rivers and streams, examining all aspects that define these biomes: Vegetation, Geographical Distribution, Challenges posed by the environment, Adaptation of the plants and animals to the environment.

Experts predict that the acquisition of fresh water will soon supersede that of oil as a main source of international tension. The world's increasing population and industrialization are raising the level of pollutants and toxins, tainting water sources that could be used for consumption or agriculture

Klappentext: Tidal freshwater wetlands occur in the upper part of estuaries, where fresh water from the river is influenced by tides. Sedimentation is prominent in the tidal freshwater zone; mud flats become elevated and may become fertile agriculture areas after reclamation. Many prominent cities (e.g., Hamburg, Rotterdam, Philadelphia, Washington, DC) were founded in or near tidal freshwater systems, resulting in their loss or degradation. A number of characteristic plant and animal species occur in tidal freshwater wetlands, reflecting their unique biological, chemical, and physical processes. These communities are distributed over different subsystems, such as the river, tidal creeks, reed and bulrush marshes, higher marshes, and various types of tidal swamp forest. Productivity of tidal freshwater wetlands is similar to that of salt marshes but plant and macrofaunal diversity are higher. Sets of case studies illustrate various conditions from Europe and North America. While many tidal freshwater wetlands have disappeared, during the last decades restoration projects have been initiated to conserve this diverse and productive ecosystem.

"Freshwater is in great supply across much of Canada. However, competing and changing demands on its use are leading to ever more complex political arrangements. This volume offers an integrated survey of that complexity, combining historical and contemporary cases in a conceptually-informed exploration of water politics. It offers a set of tools, frameworks, and applications that enable readers to recognize and explore the political dimensions of freshwater

There is a general lack of understanding of the role of lipids in aquatic ecosystems. The fundamental purpose of this book is to synthesize the divergent literature on aquatic lipids into a coordinated, digestible form. A large part of the book addresses lipid composition and production in freshwater organisms, with chapters on phytoplankton, zooplankton and benthic invertebrates. A common theme throughout the book is the function of lipids in aquatic food webs, with a chapter devoted exclusively to lipids as indicators of health in fish populations. A complementary chapter highlights the role of lipids and essential fatty acids in mariculture. Methodologies to determine the lipid content of aquatic samples and suggestions as to the utility of fatty acids as trophic markers are provided. There is a chapter on the role of lipids in the bioaccumulation and bioconcentration of toxicants and another on the relationships between lipids and surface films and foams. The final chapter highlights the similarities and differences between lipids of marine and freshwater origin. Students and researchers in ecology, phycology, aquatic toxicology, physiological ecology and limnology will find this an invaluable guide and reference

Cover -- Copyright -- Table of contents -- Foreword -- Acknowledgements -- Abbreviations -- Executive Summary -- Advances in monitoring can help close the knowledge gap and support policy responses -- Moving towards proactive policy action to curb pharmaceutical pollution -- OECD Policy Recommendations on addressing pharmaceutical residues in freshwater -- Cross-cutting recommendations -- Source-directed recommendations. Pharmaceutical life cycle stages: design, marketing authorisation, manufacturing, post-authorisation -- Use-orientated recommendations. Pharmaceutical life cycle stages: Prescription and use -- End-of-pipe recommendations. Pharmaceutical life cycle stages: collection and disposal, and wastewater treatment and reuse -- 1. Defining the challenge of managing pharmaceuticals in water -- 1.1. Key messages -- 1.2. Introduction -- 1.3. Origins, entry-pathways, sinks and concentration patterns of pharmaceuticals in the environment -- 1.4. Effects of pharmaceuticals in the environment on human and freshwater ecosystem health -- References -- Notes -- 2. Opportunities to build a policy-relevant knowledge base -- 2.1. Key messages -- 2.2. Environmental risk assessment and authorisation of pharmaceuticals -- 2.3. Existing frameworks for monitoring pharmaceuticals in water -- 2.4. Advances in water quality monitoring and potential benefits for risk assessments and water quality policy making -- 2.5. The added value of system modelling -- References -- Notes -- 3. Emerging policy instruments for the control of pharmaceuticals in water -- 3.1. Key messages -- 3.2. Introduction -- 3.3. Source-directed approaches -- 3.4. Use-orientated approaches -- 3.5. End-of-pipe measures -- References -- 4. Recommendations for the management of pharmaceuticals in freshwater.