The Clean Water Act (CWA) requires that wetlands be protected from degradation because of their important ecological functions including maintenance of high water quality and provision of fish and wildlife habitat. However, this protection generally does not encompass riparian areasâ€"the lands bordering rivers and lakesâ€"even though they often provide the same functions as wetlands. Growing recognition of the similarities in wetland and riparian area functioning and the differences in their legal protection led the NRC in 1999 to undertake a study of riparian areas, which has culminated in Riparian Areas: Functioning and Strategies for Management. The report is intended to heighten awareness of riparian areas commensurate with their ecological and societal values. The primary conclusion is that, because riparian areas perform a disproportionate number of biological and physical functions on a unit area basis, restoration of riparian functions along America's waterbodies should be a national goal.
This report indicates that climate change will significantly affect the availability and trade of fish products, especially for those countries most dependent on the sector, and calls for effective adaptation and mitigation actions encompassing food production.
Seagrasses are a vital and widespread but often overlooked coastal marine habitat. This volume provides a global survey of their distribution and conservation status.
Growing human populations and higher demands for water impose increasing impacts and stresses upon freshwater biodiversity. Their combined effects have made these animals more endangered than their terrestrial and marine counterparts. Overuse and contamination of water, overexploitation and overfishing, introduction of alien species, and alteration of natural flow regimes have led to a 'great thinning' and declines in abundance of freshwater animals, a 'great shrinking' in body size with reductions in large species, and a 'great mixing' whereby the spread of introduced species has tended to homogenize previously dissimilar communities in different parts of the world. Climate change and warming temperatures will alter global water availability, and exacerbate the other threat factors. What conservation action is needed to halt or reverse these trends, and preserve freshwater biodiversity in a rapidly changing world? This book offers the tools and approaches that can be deployed to help conserve freshwater biodiversity.
Fluctuations and declines in marine fish populations have caused growing concern among marine scientists, fisheries managers, commercial and recreational fishers, and the public. Sustaining Marine Fisheries explores the nature of marine ecosystems and the complex interacting factors that shape their productivity. The book documents the condition of marine fisheries today, highlighting species and geographic areas that are under particular stress. Challenges to achieving sustainability are discussed, and shortcomings of existing fisheries management and regulation are examined. The volume calls for fisheries management to adopt a broader ecosystem perspective that encompasses all relevant environmental and human influences. Sustaining Marine Fisheries offers new approaches to building workable fisheries management institutions, improving scientific data, and developing management tools. The book recommends ways to change current practices that encourage overexploitation of fish resources. It will be of special interest to marine policymakers and ecologists, fisheries regulators and managers, fisheries scientists and marine ecologists, fishers, and concerned individuals.
Finalist for the Washington State Book Award • From the award-winning author of The Mushroom Hunters comes the story of an iconic fish, perhaps the last great wild food: salmon. For some, a salmon evokes the distant wild, thrashing in the jaws of a hungry grizzly bear on TV. For others, it’s the catch of the day on a restaurant menu, or a deep red fillet at the market. For others still, it’s the jolt of adrenaline on a successful fishing trip. Our fascination with these superlative fish is as old as humanity itself. Long a source of sustenance among native peoples, salmon is now more popular than ever. Fish hatcheries and farms serve modern appetites with a domesticated “product”—while wild runs of salmon dwindle across the globe. How has this once-abundant resource reached this point, and what can we do to safeguard wild populations for future generations? Langdon Cook goes in search of the salmon in Upstream, his timely and in-depth look at how these beloved fish have nourished humankind through the ages and why their destiny is so closely tied to our own. Cook journeys up and down salmon country, from the glacial rivers of Alaska to the rainforests of the Pacific Northwest to California’s drought-stricken Central Valley and a wealth of places in between. Reporting from remote coastlines and busy city streets, he follows today’s commercial pipeline from fisherman’s net to corporate seafood vendor to boutique marketplace. At stake is nothing less than an ancient livelihood. But salmon are more than food. They are game fish, wildlife spectacle, sacred totem, and inspiration—and their fate is largely in our hands. Cook introduces us to tribal fishermen handing down an age-old tradition, sport anglers seeking adventure and a renewed connection to the wild, and scientists and activists working tirelessly to restore salmon runs. In sharing their stories, Cook covers all sides of the debate: the legacy of overfishing and industrial development; the conflicts between fishermen, environmentalists, and Native Americans; the modern proliferation of fish hatcheries and farms; and the longstanding battle lines of science versus politics, wilderness versus civilization. This firsthand account—reminiscent of the work of John McPhee and Mark Kurlansky—is filled with the keen insights and observations of the best narrative writing. Cook offers an absorbing portrait of a remarkable fish and the many obstacles it faces, while taking readers on a fast-paced fishing trip through salmon country. Upstream is an essential look at the intersection of man, food, and nature. Praise for Upstream “Invigorating . . . Mr. Cook is a congenial and intrepid companion, happily hiking into hinterlands and snorkeling in headwaters. Along the way we learn about filleting techniques, native cooking methods and self-pollinating almond trees, and his continual curiosity ensures that the narrative unfurls gradually, like a long spey cast. . . . With a pedigree that includes Mark Kurlansky, John McPhee and Roderick Haig-Brown, Mr. Cook’s style is suitably fluent, an occasional phrase flashing like a flank in the current. . . . For all its rehearsal of the perils and vicissitudes facing Pacific salmon, Upstream remains a celebration.”—The Wall Street Journal
Concerns over the potential ecological effects of fishing have increased with the expansion of fisheries throughout the marine waters of the United States. Effects of Trawling and Dredging on Seafloor Habitat describes how assessment of fishing impacts depends on gear type, number and location of bottom tows, and the physical and biological characteristics of seafloor habitats. Many experimental studies have documented acute, gear-specific effects of trawling and dredging on various types of habitat. These studies indicate that low mobility, long-lived species are more vulnerable to towed fishing gear than short-lived species in areas where the seabed is often disturbed by natural phenomena. Trawling and dredging may also change the composition and productivity of fish communities dependent on seafloor habitats for food and refuge. The scale of these impacts depends on the level of fishing effort. This volume presents color maps of fishing effort for all regions with significant bottom trawl or dredge fisheries-the first time that such data has been assembled and analyzed for the entire nation.
