Concerns about the effects of global climate change have focused attention on the vulnerability of circumpolar regions. This book offers a synthesis of the spectrum of techniques available for generating long-term environmental records from circumpolar lakes.
This much revised and expanded edition provides a valuable and detailed summary of the many uses of diatoms in a wide range of applications in the environmental and earth sciences. Particular emphasis is placed on the use of diatoms in analysing ecological problems related to climate change, acidification, eutrophication, and other pollution issues. The chapters are divided into sections for easy reference, with separate sections covering indicators in different aquatic environments. A final section explores diatom use in other fields of study such as forensics, oil and gas exploration, nanotechnology, and archaeology. Sixteen new chapters have been added since the first edition, including introductory chapters on diatom biology and the numerical approaches used by diatomists. The extensive glossary has also been expanded and now includes over 1,000 detailed entries, which will help non-specialists to use the book effectively.
Inland saline waters are threatened worldwide by diversion and pollution of their inflows, introductions of exotic species and economic development of these ecologically valuable habitats. Since 1979 a series of international symposia on inland saline waters has served to strengthen and expand the scope of limnological research on inland saline waters. The seventh conference continued this tradition and the papers derived from the conference focused on the ecology of microbial communities, the influence of habitat geochemistry on biogeography of flora and fauna, physical and geochemical processes, and the conservation of inland saline waters. Of particular note are papers on Walker Lake, Nevada (USA), and the Salton Sea and Mono Lake, California (USA). Continued local, national and international efforts are required to inform the public and decision-makers about the environmental problems faced by saline waters. The papers in this volume will serve this end and should be of interest to aquatic ecologists, limnologists, aquaculturalists, and water resource managers.
Diatom analysis of a Pleistocene sediment sample from Cape Storm, Ellesmere Island, dated at 35,000 to 43,000 radiocarbon years, resulted in the identification and ecological characterization of 136 taxa. The diatom thanatocoenosis represents a littoral constituent marked by the preponderance of benthic and epontic species and a neritic component manifested by meroplanktonic forms with cryophilic diatoms and stenothermal taxa. Floristic analysis indicates that deposition occurred in a shallow coastal marine environment having lowered salinities and cold water conditions influenced by ice.
List presenting 380 radiocarbon age determinations made on geological samples from Newfoundland, Nova Scotia, New Brunswick, Quebec, Ontario, Manitoba, British Columbia, Yukon Territories, mainland, Northwest Territories, Arctic Archipelago, and Washington. Archaelogical samples were taken from Newfoundland, Labrador, Nova Scotia, Ontario, and Northwest Territories, and Arctic Archipelago. A description of each sample is given, with its location and age.