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Part I - Current plant growth models, applications, and data: Mathematical descriptions of plant growth and development; Applied plant growth models for grazinglands, forests and crops; Data for plant growth modeling, and evaluation. Parte II - Forescasting and estimating plant yield: Choosing a basis for yield forecasts and estimates; Forecasting andestimating effects of weather on yield; The scale problem, modeling plant yield over time and space. Part III - The future of applied plant growth modeling: The future of applied plant growth modeling.
Recently, environmental scientists have been required to perform a new type of assessment-ecological risk assessment. This is the first book that explains how to perform ecological risk assessments and gives assessors access to the full range of useful data, models, and conceptual approaches they need to perform an accurate assessment. It explains how ecological risk assessment relates to more familiar types of assessments. It also shows how to organize and conduct an ecological risk assessment, including defining the source, selecting endpoints, describing the relevant features of the receiving environment, estimating exposure, estimating effects, characterizing the risks, and interacting with the risk manager. Specific technical topics include finding and selecting toxicity data; statistical and mathematical models of effects on organisms, populations, and ecosystems; estimation of chemical fate parameters; modeling of chemical transport and fate; estimation of chemical uptake by organisms; and estimation, propagation, and presentation of uncertainty. Ecological Risk Assessment also covers conventional risk assessments, risk assessments for existing contamination, large scale problems, exotic organisms, and risk assessments based on environmental monitoring. Environmental assessors at regulatory agencies, consulting firms, industry, and government labs need this book for its approaches and methods for ecological risk assessment. Professors in ecology and other environmental sciences will find the book's practical preparation useful for classroom instruction. Environmental toxicologists and chemists will appreciate the discussion of the utility for risk assessment of particular toxicity tests and chemical determinations.
This volume comprises the proceedings of the Second International Rangelands Congress held in Adelaide, Australia in May 1984, and includes some 350 contributions drawn from 43 different countries. The Congress addressed the problem of the conflict between land-users and the degradation of this valuable resource. Some 40% of the Earth's land surface is and or alpine and therefore unsuitable for agricultural cultivation. Collectively, these lands are known as rangelands and in their natural state they constitute a habitat for grazing animals, both domestic and wild. Despite their low productivity, rangelands have been used for thousands of years as a source of food and fibre, but other uses such as mining, tourism, recreation and conservation are exerting increasing demands. The result is often conflict between land-users and degradation of the resource.
With complete bibliographic information on over 20,000 titles from New Zealand & the Pacific Islands, NEW ZEALAND BOOKS IN PRINT is an essential guide to the publishing industry in the Pacific region. Entries are indexed by title, publisher, & subject. Also includes a book trade fax directory, all literary awards, association addresses, booksellers, libraries, & more.
This is a book of criticism. It is directed at contemporary ecology, but would apply to any science or indeed any statement that claims to contain information. Application of simple criteria to judge the information in ecological statements reveals deep inadequacies in the science. Furthermore, the complexity of the contemporary field of ecology and the mistraining of a generation of ecologists has obscured its weakness. As a result, many ecologists are unaware of the failings of the science although others are deeply concerned for the future of the field. The author, Professor Peters, argues that a return to simple question of fact, to observations, and to questions of general relevance to science and society can make ecology a useful, practical and informative science. Such science is desperately needed to meet the problems of the age. A thought-provoking book that will be of interest to all scientists, but in particular ecologists from undergraduates to senior academics and professionals.