Anderson, R. L., C. T. Walbridge, and J. T. Fiandt. 1980. Survival and growth ofTanytarsus dissimilis (Chironomidae) exposed to copper, cadmium, zinc, and lead.Archives of Environmental Contamination and Toxicology 9:329–335.PubMedGoogle Scholar
Baranov, I. V. 1961. Biohydrochemical classification of the reservoirs in the European USSR. Pages 139–193in P. V. Tyurin (ed.), The storage lakes of the USSR and their importance for fishery. Israel Program for Scientific Translations, Jerusalem.Google Scholar
Beanlands, G. E., and P. N. Duinker. 1983. An ecological framework for environmental impact assessment in Canada. Institute for Resource and Environmental Studies, Dalhousie University, Halifax, N.S., and Federal Environmental Assessment Review Office, Ottawa, 132 pp.Google Scholar
Beanlands, G. E., and P. N. Duinker. 1984. An ecological framework for environmental impact assessment.Journal of Environmental Management 18:267–277.Google Scholar
Belluck, D., and A. Felsot. 1981. Bioconcentration of pesticides by egg masses of the caddisfly,Triaenodes tardus Milne.Bulletin of Environmental Contamination and Toxicology 26:299–306.PubMedGoogle Scholar
Berger, T. R. 1977. Northern frontier, northern homeland. The report of the Mackenzie Valley Pipeline Inquiry, vol. 1. Minister of Supply and Services Canada, Ottawa, cat. no. CP 32-25/1977-1. ISBN 0-660-00775-4, 213 pp.Google Scholar
Besch, W. K., I. Schreiber, and D. Herbst. 1977. DerHydropsyche—Toxizitatstest, erprobt an Fenethcarb.Schweizerische Zeitschrift für Hydrologie 39:69–85.Google Scholar
Besch, W. K., I. Schreiber, and E. Magnin. 1979. Influence du sulfate de cuivre sur la structure du filet des larves d'Hydropsyche (Insecta, Trichoptera).Annales de Limnologie 15:123–138.Google Scholar
Borror, D. J., D. M. DeLong, and C. A. Triplehorn. 1976. An introduction to the study of insects, 4th edn. Holt, Rinehart and Winston, New York, 852 pp.Google Scholar
Bromenshenk, J. J., S. R. Carlson, J. C. Simpson, and J. M. Thomas. 1985. Pollution monitoring of Puget Sound with honey bees.Science (Washington, DC) 227:632–634.Google Scholar
Cheng, L., G. Alexander, and P. J. Franco. 1976. Cadmium and other heavy metals in sea-skaters (Gerridae:Halobates, Rheumatobates).Water, Air, and Soil Pollution 6:33–38.Google Scholar
Cheng, L., P. J. Franco, and M. Schulz-Baldes. 1979. Heavy metals in the sea-skaterHalobates robustus from the Galapagos Islands: concentrations in nature and uptake experiments with special reference to cadmium.Marine Biology 54:201–206.Google Scholar
Danks, H. V. (ed.). 1979. Canada and its insect fauna.Memoirs of the Entomological Society of Canada 108, 573 pp.Google Scholar
Folmar, L. C. 1978. Avoidance chamber responses of mayfly nymphs exposed to eight herbicides.Bulletin of Environmental Contamination and Toxicology 19:312–318.PubMedGoogle Scholar
Freitag, R., L. Hastings, W. R. Mercer, and A. Smith. 1973. Ground beetle populations near a kraft mill.Canadian Entomologist 105:299–310.Google Scholar
Friesen, M. K., T. D. Galloway, and J. F. Flannagan. 1983. Toxicity of the insecticide permethrin in water and sediment to nymphs of the burrowing mayflyHexagenia rigida (Ephemeroptera: Ephemeridae).Canadian Entomologist 115:1007–1014.Google Scholar
Hamilton, A. L., and O. A. Saether. 1971. The occurrence of characteristic deformities in the chironomid larvae of several Canadian lakes.Canadian Entomologist 103:363–368.Google Scholar
Hawkes, H. A., 1979. Invertebrates as indicators of river water quality. Pages 2–1 to 2–45in A. James and L. Evison (eds.), Biological indicators of water quality. John Wiley and Sons, New York.Google Scholar
Hecky, R. E., R. W. Newbury, R. A. Bodaly, K. Patalas, and D. M. Rosenberg. 1984. Environmental impact prediction and assessment: the Southern Indian Lake experience.Canadian Journal of Fisheries and Aquatic Sciences 41:720–732.Google Scholar
Hellawell, J. M. 1978. Biological surveillance of rivers. A biological monitoring handbook. Dorset Press, Dorchester, UK, 332 pp.Google Scholar
Hilsenhoff, W. L. 1977. Use of arthropods to evaluate water quality of streams. Technical Bulletin no. 100. Department of Natural Resources, Madison, Wisconsin, 15 pp.Google Scholar
Hilsenhoff, W. L. 1982. Using a biotic index to evaluate water quality in streams. Technical Bulletin no. 132. Department of Natural Resources, Madison, Wisconsin, 22 pp.Google Scholar
Hirst, S. M. 1984. Applied ecology and the real world. I. Institutional factors and impact assessment.Journal of Environmental Management 18:189–202.Google Scholar
Kevan, P. G., and W. E. LaBerge. 1979. Demise and recovery of native pollinator populations through pesticide use and some economic implications.In Proceedings of the 4th symposium on pollination.Maryland Agricultural Experiment Station Special Miscellaneous Publication 1:489–508.Google Scholar
Kevan, P. G., and E. B. Oppermann. 1980. Blueberry production in New Brunswick, Nova Scotia and Maine: a reply to Wood et al.Canadian Journal of Agricultural Economics 28:81–84.Google Scholar
Kimball, K. D., and S. A. Levin. 1985. Limitations of laboratory bioassays: the need for ecosystem-level testing.Bio-Science 35:165–171.Google Scholar
Koehn, T., and C. Frank. 1980. Effect of thermal pollution on the chironomid fauna in an urban channel. Pages 187–194in D. A. Murray (ed.), Chironomidae: ecology, systematics, cytology and physiology: proceedings of the 7th international symposium on Chironomidae, Dublin, August 1979. Pergamon, Oxford, UK.Google Scholar
Larkin, P. A. 1984. A commentary on environmental impact assessment for large projects affecting lakes and streams.Canadian Journal of Fisheries and Aquatic Sciences 41:1121–1127.Google Scholar
Lash, T. J. F., D. E. L. Maasland, G. Filteau, and P. Larkin. 1974. On doing things differently: an essay on environmental impact assessment of major projects. Issues in Canadian Science Policy 1:9–16. Science Council of Canada, Ottawa.Google Scholar
Lauenroth, W. K., D. G. Milchunas, and T. P. Yorks. 1984. Sulfur dioxide and grasslands: a synthesis. Pages 185–198in W. K. Lauenroth and E. M. Preston (eds.), The effects of SO2 on a grassland: a case study in the northern Great Plains of the United States. Springer-Verlag, New York.Google Scholar
Leetham, J. W., J. L. Dodd, J. A. Logan, and W. K. Lauenroth. 1981. Response ofMelanoplus sanguinipes to low-level sulphur dioxide exposure from egg hatch to adult (Orthoptera: Acrididae). Pages 176–184in E. M. Preston, D. W. O'Guinn, and R. A. Wilson (eds.), The bioenvironmental impact of a coal-fired power plant. Sixth interim report, Colstrip, Montana, August 1980. EPA 600/3-81-007. US Environmental Protection Agency, Corvallis, Oregon.Google Scholar
Leetham, J. W., W. K. Lauenroth, D. G. Milchunas, T. Kirchner, and T. P. Yorks. 1984. Responses of heterotrophs. Pages 137–159in W. K. Lauenroth and E. M. Preston (eds.), The effects of SO2 on a grassland: a case study in the northern Great Plains of the United States. Springer-Verlag, New York.Google Scholar
Lehmkuhl, D. M. 1981. Report on the impact of methoxychlor on non-target organisms in the Saskatchewan River, appendix III, 165 pp.In W. W. Sawchyn (ed.), Impact of methoxychlor as a blackfly larvicide in the Saskatchewan River. Saskatchewan Research Council Publication no. C-805-19-E-82.Google Scholar
Lehmkuhl, D. M. 1982. The impact of methoxychlor on non-target organisms in the Saskatchewan River with emphasis of long-term effects and the effectiveness of reduced dosages. Unpublished manuscript prepared for the Saskatchewan Department of Agriculture, Regina, Saskatchewan, 54 pp.Google Scholar
Lehmkuhl, D. M., H. V. Danks, V. M. Behan-Pelletier, D. J. Larson, D. M. Rosenberg, and I. M. Smith. 1984. Recommendations for the appraisal of environmental disturbance: some general guidelines, and the value and feasibility of insect studies.Supplement to the Bulletin of the Entomological Society of Canada 16(3):8.Google Scholar
Lewis, R. A., A. S. Lefohn, and N. R. Glass. 1976. Introduction to the Colstrip, Montana, coal-fired power plant project. Pages 1–13in R. A. Lewis, N. R. Glass, and A. S. Lefohn (eds.), The bioenvironmental impact of a coal-fired power plant. Second interim report, Colstrip, Montana, June 1975. EPA-600/3-76-013. US Environmental Protection Agency, Corvallis, Oregon.Google Scholar
Lock, M. A., R. R. Wallace, D. R. Barton, and S. Charlton. 1981a. The effects of synthetic crude oil on microbial and macroinvertebrate benthic river communities. I. Colonisation of synthetic crude oil contaminated substrata.Environmental Pollution (Series A) 24:207–217.Google Scholar
Lock, M. A., R. R. Wallace, D. R. Barton, and S. Charlton. 1981b. The effects of synthetic crude oil on microbial and macroinvertebrate benthic river communities. II. The response of an established community to contamination by synthetic crude oil.Environmental Pollution (Series A) 24:263–275.Google Scholar
Majer, J. D. 1983. Ants: bio-indicators of minesite rehabilitation, land use, and land conservation.Environmental Management 7:375–383.Google Scholar
Mauck, W. L., and L. E. Olson. 1977. Polychlorinated biphenyls in adult mayflies (Hexagenia bilineata) from the upper Mississippi River.Bulletin of Environmental Contamination and Toxicology 17:387–390.PubMedGoogle Scholar
McLachlan, A. J. 1974. Development of some lake ecosystems in tropical Africa, with special reference to the invertebrates.Biological Reviews of the Cambridge Philosophical Society 49:365–397.Google Scholar
McNary, T.J., D. G. Milchunas, J. W. Leetham, W. K. Lauenroth, and J. L. Dodd. 1981. Effect of controlled low levels of SO2 on grasshopper densities on a northern mixed-grass prairie.Journal of Economic Entomology 74:91–93.Google Scholar
McNeil, J. N., R. Greenhalgh, and J. M. McLeod. 1979. Persistence and accumulation of fenitrothion residues in jackpine foliage and their effect on the Swaine jackpine sawflyNeodiprion swainei (Hymenoptera: Diprionidae).Environmental Entomology 8:752–755.Google Scholar
Newman, J. R., and R. K. Schreiber. 1984. Animals as indicators of ecosystem responses to air emissions.Environmental Management 8:309–324.Google Scholar
Patalas, K., and A. Salki. 1984. Effects of impoundment and diversion on the crustacean plankton of Southern Indian Lake.Canadian Journal of Fisheries and Aquatic Sciences 41:613–637.Google Scholar
Petersen, L. B.-M, and R. C. Petersen, Jr. 1983. Anomalies in hydropsychid capture nets from polluted streams.Freshwater Biology 13:185–191.Google Scholar
Preston, E. M., D. W. O'Guinn, and R. A. Wilson (eds.). 1981. The bioenvironmental impact of a coal-fired power plant. Sixth interim report, Colstrip, Montana, August 1980. EPA 600/3-81-007. US Environmental Protection Agency, Corvallis, Oregon, 331 pp.Google Scholar
Resh, V. H., T. S. Flynn, G. A. Lamberti, E. P. McElravy, K. L. Sorg, and J. R. Wood. 1981. Responses of the sericostomatid caddisflyGumaga nigricula (McL.) to environmental disruption. Pages 311–318in G. P. Moretti (ed.), Proceedings of the 3rd international symposium on Trichoptera. Series Entomologica vol. 20. Dr. W. Junk, The Hague.Google Scholar
Resh, V. H., and G. Grodhaus. 1983. Aquatic insects in urban environments. Pages 247–276in G. W. Frankie and C. S. Koehler (eds.), Urban entomology: interdisciplinary perspectives. Praeger, New York.Google Scholar
Resh, V. H., and D. G. Price. 1984. Sequential sampling: a cost-effective approach for monitoring benthic macroinvertebrates in environmental impact assessments.Environmental Management 8:75–80.Google Scholar
Resh, V. H., and J. D. Unzicker. 1975. Water quality monitoring and aquatic organisms: the importance of species identification.Journal of the Water Pollution Control Federation 47:9–19.PubMedGoogle Scholar
Rosenberg, D. M., and others. 1981. Recent trends in environmental impact assessment.Canadian Journal of Fisheries and Aquatic Sciences 38:591–624.Google Scholar
Rosenberg, D. M., and N. B. Snow. 1977. A design for environmental impact studies with special reference to sedimentation in aquatic systems of the Mackenzie and Porcupine River drainages. Pages 67–78, section IIIin Proceedings of the circumpolar conference on northern ecology, 15–18 September 1975, Ottawa. National Research Council of Canada, Ottawa.Google Scholar
Rosenberg, D. M., and A. P. Wiens. 1976. Community and species responses of Chironomidae (Diptera) to contamination of fresh waters by crude oil and petroleum products, with special reference to the Trail River, Northwest Territories.Journal of the Fisheries Research Board of Canada 33:1955–1963.Google Scholar
Rosenberg, D. M., A. P. Wiens, and J. F. Flannagan. 1980. Effects of crude oil contamination on Ephemeroptera in the Trail River, Northwest Territories, Canada. Pages 443–455in J. F. Flannagan and K. E. Marshall (eds.), Advances in Ephemeroptera biology. Plenum, New York.Google Scholar
Saether, O. A. 1975. Nearctic chironomids as indicators of lake typology.Verhandlungen Internationale Vereinigung für theoretische und angewandte Limnologie 19:3127–3133.Google Scholar
Saether, O. A. 1979. Chironomid communities as water quality indicators.Holarctic Ecology 2:65–74.Google Scholar
Saether, O. A. 1980. The influence of eutrophication on deep lake benthic invertebrate communities.Progress in Water Technology 12:161–180.Google Scholar
Schindler, D. W. 1987. Detecting ecosystem responses to stress.Canadian Journal of Fisheries and Aquatic Sciences (Supplement) (in press).Google Scholar
Schulz-Baldes, M., and L. Cheng. 1980. Cadmium inHalobates micans from the Central and South Atlantic Ocean.Marine Biology 59:163–168.Google Scholar
Smith, S. B. 1981. Alberta Oil Sands Environmental Research Program, 1975–1980: summary report. AOSERP Report 118. Alberta Environment, Research Management Division, Edmonton, Alberta, 170 pp.Google Scholar
Summerlin, J. W., A. C. F. Hung, and S. B. Vinson. 1977. Residues in nontarget ants, species simplification and recovery of populations following aerial applications of mirex.Environmental Entomology 6:193–197.Google Scholar
Symons, P. E. K., and J. L. Metcalfe. 1978. Mortality, recovery, and survival of larvalBrachycentrus numerosus (Trichoptera) after exposure to the insecticide fenitrothion.Canadian Journal of Zoology 56:1284–1290.Google Scholar
Tooby, T. E., and D. J. Macey. 1977. Absence of pigmentation in corixid bugs (Hemiptera) after the use of the aquatic herbicide dichlobenil.Freshwater Biology 7:519–525.Google Scholar
Underwood McLellan and Associates Ltd. 1970. Churchill River diversion: study of alternative diversions. Appendix B: resources investigations, Section 4: fisheries. 116 pp. and bibliography.Google Scholar
Walton, B. T. 1981. Chemical impurity produces extra compound eyes and heads in cricket.Science (Washington, DC) 212:51–53.Google Scholar
Warwick, W. F. 1980a. Palaeolimnology of the Bay of Quinte, Lake Ontario: 2800 years of cultural influence.Canadian Bulletin of Fisheries and Aquatic Sciences 206:1–117.Google Scholar
Warwick, W. F. 1980b. Pasqua Lake, southeastern Saskatchewan: a preliminary assessment of trophic status and contamination based on the Chironomidae (Diptera). Pages 255–267in D. A. Murray (ed.), Chironomidae: ecology, systematics, cytology and physiology: proceedings of the 7th international symposium on Chironomidae, Dublin, August 1979. Pergamon, Oxford, UK.Google Scholar
Whiting, E. R., and H. F. Clifford. 1983. Invertebrates and urban runoff in a small northern stream, Edmonton, Alberta, Canada.Hydrobiologia 102:73–80.Google Scholar
Wiederholm, T. 1984a. Incidence of deformed chironomid larvae (Diptera: Chironomidae) in Swedish lakes.Hydrobiologia 109:243–249.Google Scholar
Wiederholm, T. 1984b. Responses of aquatic insects to environmental pollution. Pages 508–557in V. H. Resh and D. M. Rosenberg (eds.), The ecology of aquatic insects. Praeger, New York.Google Scholar
Wiens, A. P., and D. M. Rosenberg. 1984. Effect of impoundment and river diversion on profundal macrobenthos of Southern Indian Lake, Manitoba.Canadian Journal of Fisheries and Aquatic Sciences 41:638–648.Google Scholar
Winner, R. W., M. W. Boesel, and M. P. Farrell. 1980. Insect community structure as an index of heavy-metal pollution in lotic ecosystems.Canadian Journal of Fisheries and Aquatic Sciences 37:647–655.Google Scholar
Young, C. L., and W. P. Stephen. 1970. The acoustical behavior ofAcheta domesticus L. (Orthoptera: Gryllidae) following sublethal doses of parathion, dieldrin and sevin.Oecologia (Berlin) 4:143–162.Google Scholar
Classification essays rank the groups of objects according to a common standard. For example, popular inventions may be classified according to their significance to the humankind.
Classification is a convenient method of arranging data and simplifying complex notions.
When you select a topic, do not forget about the length of your paper. Choose the topic you will be able to cover in your essay, do not write about something global or general.
Consider these examples:
- Evaluate the best to worst methods of upbringing.
- Rate the films according to their influence on people.
- Classify careers according to the opportunities they offer.
You should point out the common classifying principle for the group you are writing about. It will become the thesis of your essay.
It is important for you to use clear method of classification in your essay, especially when you are dealing with subjective categories such as "quality" or "benefit". Make sure you explain what you mean by this term.
To organize a classification essay, the writer should:
- categorize each group.
- describe or define each category. List down the general characteristics and discuss them.
- provide enough illustrative examples. An example should be a typical representative of the group.
- point out similarities or differences of each category, using comparison-contrast techniques.