Search results: 5,474 results (approx.)

1. Minimization of freshwater extraction by using treated wastewater: a fuzzy-based approach.

The rapid growth of population, insufficient recharges of fresh water to the underground aquifers and increased agricultural and landscaping activities have stressed on the natural water systems in the Middle East countries. One of the available fresh water supply sources is the underground water...

Author(s) : Shakhawat Chowdhury; Tahir Husain

Publisher : IOS Press, Amsterdam, Netherlands

Journal article : Asian Journal of Water Environment and Pollution 2006 Vol.3 No.1 pp.13-19

2. The biochemistry of polycyclic aromatic hydrocarbons: sources, interactions, biodegradation, toxicity and analytical developments.

The proceedings of the title symposium, held in Dallas, Texas, USA, from 29 March to 2 April 1999 are presented.

Conference proceedings : Organic Geochemistry 1999 Vol.30 No.8B pp.873-1026 ref.Many

3. Biodiversity, ecosystem function and forest management. Part I.

In part one, the authors dealt first with the fundamentals of biodiversity and its role in forest ecosystems. They then discuss the problems relating to its level of expression and the measurements and indicators for assessing biodiversity. Following a section on ethical considerations, the authors ...

Foreign Title :Biodiversité, fonctionnement des écosystèmes et gestion forestière. Première partie.

Author(s) : Tacon, F. le; Selosse, M. A.; Gosselin, F.

Publisher : École Nationale du Génie Rural, des Eaux et des Forêts (ENGREF), Nancy, France

Journal article : Revue Forestière Française 2000 Vol.52 No.6 pp.477-496 ref.Many

4. The internal sustainable mechanism and its regulation in agroecosystem.

The sustainability of resource utilization in an agroecosystem, the sustainable mechanisms of energy flow, nutrient cycles, population regulation mechanisms and dynamic equilibrium, and its regulation in an agroecosystem are studied in this paper.

Author(s) : Gao QingLu; Xue Xiang

Journal article : Research of Agricultural Modernization 1998 Vol.19 No.2 pp.110-113 ref.6

5. Microwave digestion procedures for environmental matrices.

This paper presents a summary of different microwave digestion based methodologies for analysing environmental (soil, water etc.) samples.

Author(s) : Lamble, K. J.; Hill, S. J.

Journal article : Analyst 1998 Vol.123 No.7 pp.103R-133R ref.193

6. Environmentally friendly animal production.

Foreign Title :Umweltschonende Tierproduktion.

Author(s) : Ratschow, J. P.

Journal article : Züchtungskunde 1998 Vol.70 No.6 pp.446-455 ref.7

8. Flooding: natural and managed disturbances. A special issue of BioScience devoted to flooding as a disturbance.

This paper introduces flooding within the context of natural disturbances, discusses relevant scientific paradigms, provides background on the eight case studies documented elsewhere in this issue, and highlights emerging knowledge, challenges and opportunities.

Author(s) : Michener, W. K.; Haeuber, R. A.

Journal article : BioScience 1998 Vol.48 No.9 pp.677-680 ref.23

9. A primer for environmental literacy.

Based on a graduate certificate course on environmental ethics at the University of Georgia, USA, this book presents key concepts of environmental science in a format understandable by non-scientists. Twenty-six chapters are devoted to an environmental concept or set of allied concepts organised...

Author(s) : Golley, F. B.

Publisher : Yale University Press, New Haven, USA

Book : A primer for environmental literacy. 1998 pp.xiv + 254 pp. ref.ref at end of chapters; 9 pp. of

10. Pb isotope composition in lichens and aerosols from eastern Sicily: insights into the regional impact of volcanoes on the environment.

A total of 25 lichen thalli of Parmelia conspersa (Ehrh), collected at Vulcano island and at Mt. Etna, during a one year biogeochemical survey, were analysed for Pb, Br, Al, Sc, 206Pb/207Pb, and 208Pb/206Pb ratios. Lead isotope ratios were also measured on aerosols samples from urban areas and...

Author(s) : Monna, F.; Aiuppa, A.; Varrica, D.; Dongarra, G.

Journal article : Environmental Science & Technology 1999 Vol.33 No.15 pp.2517-2523 ref.40

11. Terrestrial NPP: toward a consistent data set for global model evaluation.

Progress in modelling the global carbon cycle is inhibited by the lack of a high-quality data set based upon field observations of net primary productivity (NPP) with which to calibrate, parameterize, and evaluate terrestrial biosphere models. Under the auspices of the Global Primary Production...

Author(s) : Scurlock, J. M. O.; Cramer, W.; Olson, R. J.; Parton, W. J.; Prince, S. D.

Journal article : Ecological Applications 1999 Vol.9 No.3 pp.913-919 ref.38

12. Summary reports and recommendations covering specific agri-environmental indicators.

Definitions are provided of agri-environmental indicators (AEIs), their method of calculation, interpretation and further refinement. These AEIs concern water quality, water use, soil quality, land conservation, biodiversity, wildlife habitat, landscape, farm management, farm financial resources,...

Publisher : Organisation for Economic Cooperation and Development (OECD), Paris, France

Conference paper : OECD Proceedings. Environmental indicators for agriculture, Volume 2: issues and design "The York Workshop". 1999 pp.65-109

13. Environmental information systems.

A framework for environmental information systems based on four phases of data processing: data capture, aggregation, storage, and analysis, is described. The first phase concerns the collection of environmental raw data. In the second phase this raw data is condensed and enriched to extract...

Author(s) : Gunther, O.

Publisher : Springer-Verlag GmbH, Heidelberg, Germany

Miscellaneous : Environmental information systems. 1997 pp.350 pp.

14. Emergy evaluation of the biosphere and natural capital.

The measure of value called emergy is used to evaluate the flows of energy and resources that sustain the biosphere including the economy of humans. A donor system of value based on solar emergy required to produce things is suggested as the only means of reversing the logic trap inherent in...

Author(s) : Brown, M. T.; Ulgiati, S.

Journal article : Ambio 1999 Vol.28 No.6 pp.486-493 ref.46

15. Contribution of disturbance to increasing seasonal amplitude of atmospheric CO2.

Recent increases in the seasonal amplitude of atmospheric carbon dioxide (CO2) at high latitudes suggest a widespread biospheric response to high-latitude warming. The seasonal amplitude of net ecosystem carbon exchange by northern Siberian ecosystems is shown to be greater in disturbed than...

Author(s) : Zimov, S. A.; Davidov, S. P.; Zimova, G. M.; Davidova, A. I.; Chapin, F. S., III; Chapin, M. C.; Reynolds, J. F.

Journal article : Science (Washington) 1999 No.No. 5422 pp.1973-1976 ref.28

16. Environmental impacts of groundwater exploitation using GIS.

Although the environmental impacts of groundwater abstraction and water table recovery are now known, historically they were given scant recognition due to the ad hoc nature of the development of aquifers. The potential impacts of groundwater exploitation are summarised, and the effects of rising...

Author(s) : Hedges, P. D.; Charnock, T. W.

Journal article : Environmental Management and Health 1999 Vol.10 No.1 pp.72-78 ref.30

17. Impulse response functions of terrestrial carbon cycle models: method and application.

To provide a common currency for model comparison, validation and manipulation, the use of 'impulse response functions', a concept only partially developed for use in terrestrial carbon cycle modelling, is suggested and described. The derivation of impulse response functions is described, and (i)...

Author(s) : Thompson, M. V.; Randerson, J. T.

Journal article : Global Change Biology 1999 Vol.5 No.4 pp.371-394 ref.64

18. Natural environment and human culture: defining terms and understanding world views.

The development of precise, operational definitions of terminology can be ineffective when applied to concepts such as 'nature', 'natural', and 'culture'. The terms 'nature', 'natural environment', 'environmental change', and 'environmental degradation' were examined. Since the term 'natural' can...

Author(s) : McIsaac, G. F.; Brün, M.

Journal article : Journal of Environmental Quality 1999 Vol.28 No.1 pp.1-10 ref.49

19. Handbook of environmental sciences: basic assumptions and application of ecosystem research.

Foreign Title :Handbuch der Umweltwissenschaften: Grundlagen und Anwendungen der Ökosystemforschung.

Author(s) : Fränzle, O.; Müller, F.; Schröder, W.

Publisher : Ecomed Publishers, Landsberg, Germany

Book : Handbuch der Umweltwissenschaften: Grundlagen und Anwendungen der Ökosystemforschung. 1997 pp.400 pp.

20. Requirements for effective modelling strategies.

A set of modelling guidelines for complex environmental models is presented and the required associated research areas are discussed.

Author(s) : Gaunt, J. L.; Riley, J.; Stein, A.; Penning de Vries, F. W. T.

Journal article : Agricultural Systems 1997 Vol.54 No.2 pp.153-168 ref.43

21. Biotechnology: enhancing human nutrition in developing and developed worlds.

While the last 50 years of agriculture have focused on meeting the food, feed, and fibre needs of humans, the challenges for the next 50 years go far beyond simply addressing the needs of an ever-growing global population. In addition to producing more food, agriculture will have to deal with...

Author(s) : Kishore, G. M.; Shewmaker, C.

Journal article : Proceedings of the National Academy of Sciences of the United States of America 1999 Vol.96 No.11 pp.5968-5972 ref.19

22. Watershed management and the Web.

A case study is presented for the Patuxent River, (Maryland, USA) watershed to illustrate the World Wide Web approach to watershed management. The model built for the Patuxent area integrates the knowledge available for the area and provides a conceptual basis for understanding the watershed as a...

Author(s) : Voinov, A.; Costanza, R.

Journal article : Journal of Environmental Management 1999 Vol.56 No.4 pp.231-245 ref.26

23. Interpreting, correlating, and predicting the multimedia concentrations of PCDD/Fs in the United Kingdom.

Reported concentrations of 17 polychlorinated dibenzo-p-dioxin and furan congeners or congener groups in air, soil, river water, river sediment, herbage, sludge and human adipose tissue in the UK have been compiled. The relative equilibrium status of each congener was deduced with respect to its...

Author(s) : Cole, J. G.; Mackay, D.; Jones, K. C.; Alcock, R. E.

Journal article : Environmental Science & Technology 1999 Vol.33 No.3 pp.399-405 ref.13

24. Electronic sources of water resources information from the National Agricultural Library.

Internet sources of water-related information available from the United State's National Agricultural Library (NAL) are described. The electronic information sources discussed include Enviro-News (an Internet mailing list), AGRICOLA (NAL's database of the agricultural literature), the Water Quality ...

Author(s) : Makuch, J. R.

Publisher : American Society of Agricultural Engineers (ASAE), St Joseph, USA

Conference paper : ASAE/CSAE-SCGR Annual International Meeting, Toronto, Ontario, Canada, 18-21 July, 1999. 1999 pp.8 pp. ref.4

25. Origin, behaviour and potential risk of trace elements in agrarian ecosystems.

Several processes, both natural and related to human activities, are responsible for the contamination of the soil and the environment. The biogeochemical cycles of inorganic pollutants have been gradually accelerated by human activities over several centuries. The Industrial Revolution marked a...

Foreign Title :Origine, comportamento e rischio potenziale degli elementi in tracce negli ecosistemi agrari.

Author(s) : Adriano, D. C.; Wenzel, W. W.; Lombi, E.

Publisher : Pitagora Editrice, Bologna, Italy

Miscellaneous : Impatto ambientale di metalli pesanti ed elementi in tracce. 1999 pp.9-24 ref.44