Challenges in Insect Conservation: Managing Fluctuating Populations In Disturbed Habitats

  • Cheryl B. Schultz
  • Gary C. Chang


The vast majority of the world’s species are insects (at least 80%; Mawdsley and Stork 1995). Their importance is overwhelming by almost any measure. For example, insects and other arthropods contribute substantially to standing biomass; 1,000 kg/ha is an estimate for the United States (Pimentel et al. 1980). In most terrestrial and freshwater ecosystems they play critical roles as prey, predators, herbivores and pollinators (Free 1970; Debach and Rosen 1991; Kellert 1993; Lloyd and Barrett 1996). Indeed, in one of the first issues of the Society for Conservation Biology’s journal, E.O. Wilson (1987) called insects “the little things that run the world.” Because they comprise the majority of the earth’s biodiversity, insects should be considered pivotal in conservation efforts (Kim 1993). Unfortunately, an alarmingly small percent of our conservation literature focusses on insect issues. For example, in 1993, 1994 and 1995, the journals Ecological Applications, Conservation Biology, and Biological Conservation published 1,070 articles with only 62 related to insect issues and still fewer related to conservation of declining insect populations. Thus, only 6% of our conservation literature is aimed at 80% of our planet’s biodiversity. This neglect of insect conservation cannot be justified on the basis of insects not being endangered. In Britain where the biodiversity is relatively well-documented, approximately 22,500 insect species occur; 43 insects are believed to have gone extinct between 1900 and 1987 (Hambler and Speight 1996). The number of insect species believed extinct in Britain is over eight times that of number of extinct vertebrates, and over three times that of flowering plants (Hambler and Speight 1996).


Natural Enemy Conservation Biology Biological Conservation Classical Biological Control Reserve Design 


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Literature Cited

  1. Abele, L.G. and W.K. Patton. 1976. The size of coral heads and the community biology of associated decapod crustaceans. Journal of Biogeography 3:5–47.Google Scholar
  2. Altieri, M.A. 1991. Increasing biodiversity to improve insect pest management in agroecosystems. In The biodiversity of microorganisms and invertebrates: its role in sustainable agriculture, ed. D.L. Hawksworth, 165–182. Wallingford, UK: CAB International.Google Scholar
  3. Alverson, E.R. 1993. Assessment of proposed wetland mitigation areas in west Eugene. Report to the Environmental Protection Agency.Google Scholar
  4. Anonymous. 1995. Endangered and threatened wildlife and plants: Review of plant and animal taxa that are candidates for listing as endangered or threatened species. Federal Register 61(40):7596–7613.Google Scholar
  5. Armbruster, P. and R. Lande. 1993. A population viability analysis for African Elephant: How big should reserves be? Conservation Biology 7:602–610.Google Scholar
  6. Barnosky, C.W., P.M. Anderson, and P.J. Bartlein. 1987. The northwestern U.S. during deglaciation: Vegetational history and paleoclimatic implications. In North America and adjacent oceans during the last deglaciation: The Geology of North America, eds. W.F. Ruddiman and H.E. Wright, Jr., 289–321. Boulder, CO: Geological Society of America.Google Scholar
  7. Bassett, C. and K.H. Miers. 1984. Scientific reserves in state forests. Journal of the Royal Society of New Zealand 14:29–35.Google Scholar
  8. Berenbaum, M.R. 1995. Bugs in the system. Reading, MA: Addison-Wesley Publishing.Google Scholar
  9. Berg, C.C. and J.T. Wiebes. 1992. African fig trees and fig wasps. New York: Koninklijke Nederlandse Akademie van Wetenschappen.Google Scholar
  10. Berglund, B.E. 1991. The cultural landscape during 6000 years in southern Sweden—the Ystad Project: The project—background, aims and organization. Ecological Bulletins 41: 13–17.Google Scholar
  11. Bierzychudek, P. 1981. Pollinator limitation of plant reproductive effort. American Naturalist 117:838–840.Google Scholar
  12. Blackstock, T.H., J.P. Stevens, E.A. Howe and D.P. Stevens. 1995. Changes in the extent and fragmentation of heathland and other semi-natural habitats between 1920–22 and 1987–88 in the Llyn Peninsula, Wales, UK. Biological Conservation 72: 33–44.Google Scholar
  13. Bodenheimer, F.S. 1951. Insects as human food. The Hague: Dr. W. Junk.Google Scholar
  14. Booij, C.J.H. and J. Noorlander. 1992. Farming systems and insect predators. Agriculture Ecosystem and Environment 40:125–135.Google Scholar
  15. Booth, S.R. and H. Riedl. 1996. Diflubenzuron-based management of the pear pest complex in commercial orchards of the Hood River Valley in Oregon. Journal of Economic Entomology 89:621–630.Google Scholar
  16. Borror, D.J., C.A. Triplehorn, and N.F. Johnson. 1989. An introduction to the study of insects. 6th ed. San Diego, CA: Harcourt, Brace, and Jovanovich.Google Scholar
  17. Boyd, R. 1986. Strategies of Indian burning in the Willamette valley. Canadian Journal of Anthropology 5:65–86.Google Scholar
  18. Briese, D.T. 1982. The effect of ants on the soil of a semi-arid saltbrush habitat. Insectes Sociaux 29:375–386.Google Scholar
  19. Brooke, M.D.L., D.R. Lees, and J.M. Lawman. 1985. Spot distribution in the meadowbrown butterfly, Maniola jurtina L. (Lepidoptera: Satyridae): South Welsh populations. Biological Journal of the Linnaen Society 24:337–348.Google Scholar
  20. Brown, J.H. 1978. Mammals on mountaintops: Nonequilibrium insular biogeography. American Naturalist 105:467–478.Google Scholar
  21. Caltagirone, L.E. 1981. Landmark examples in classical biological control. Annual Review of Entomology 26:213–232.Google Scholar
  22. Cappuccino, N. and P. Kareiva. 1985. Coping with a capricious environment: A population study of a rare peirid butterfly. Ecology 66:152–161.Google Scholar
  23. Carruthers, R.I. and J.A. Onsager. 1993. Perspective on the use of exotic natural enemies for biological control of pest grasshoppers (Orthoptera: Acrididae). Environmental Entomology 22:885–903.Google Scholar
  24. Carson, R. 1962. Silent spring. Boston: Houghton Mifflin Co.Google Scholar
  25. Caswell, H. 1989. Matrix population models. Sunderland, MA: Sinauer Associates.Google Scholar
  26. Clement, S.L. 1990. Insect natural enemies of yellow starthistle in southern Europe and the selection of candidate biological control agents. Environmental Entomology 19:1882–1888.Google Scholar
  27. Coats, J.R. 1994. Risks from natural versus synthetic insecticides. Annual Review of Entomology 39:489–515.Google Scholar
  28. Cohen, J.E., K. Schoenly, K.L. Heong, H. Justo, G. Arida, A.T. Barrion, and J.A. Litsinger. 1994. A food web approach to evaluating the effect of insecticide spraying on insect pest population dynamics in a Philippine irrigated rice ecosystem. Journal of Applied Ecology 31:747–763.Google Scholar
  29. Collins, N.M. and J.A. Thomas, eds. 1991. The conservation of insects and their habitats. London: Academic Press.Google Scholar
  30. Compton, S.G., S.J. Ross, and I.W.B. Thornton. 1994. Pollinator limitation of fig tree reproduction on the island of Anak Krakatau (Indonesia). Biotropica 26:180–186.Google Scholar
  31. Dawson, D.G. 1984. Principles of ecological biogeography and criteria for reserve design. Journal of the Royal Society of New Zealand 117:629–638.Google Scholar
  32. Debach, P. and B. Bartlett. 1951. Effects of insecticides on biological control of insect pests of citrus. Journal of Economic Entomology 44:372–383.Google Scholar
  33. Debach, P. and D. Rosen. 1991. Biological control by natural enemies. New York: Cambridge University Press.Google Scholar
  34. Decsimon, H. and M. Napolitano. 1993. Enzyme polymorphim, wing pattern variability and geographical isolation in and endangered butterfly species. Biological Conservation 66:117–123.Google Scholar
  35. Dempster, J.P. 1991. Fragmentation, isolation and mobility of insect populations. In The conservation of insects and their habitat, eds. M. Collins and J.A. Thomas, 71–108. London: Academic Press.Google Scholar
  36. Dempster, J.P., M.L. King, and K.H. Lakhani. 1976. The status of the swallowtail butterfly in Britain. Ecological Entomology 1:71–84.Google Scholar
  37. Deshaye, J. and P. Morisset. 1989. Species-area relationships and the SLOSS effect in asubarctic archipelago. Biological Conservation 48:265–276.Google Scholar
  38. Diamond, J. 1975. The island dilemma: Lessons of modern biogeographic studies for the design of nature reserves. Biological Conservation 7:129–146.Google Scholar
  39. Dover, J.W. 1991. The conservation of insects on arable farmland. In The conservation of insects and their habitats, eds. N.M. Collins and J.A. Thomas, 293–318. London: Academic Press.Google Scholar
  40. Edwards, C.A. 1993. The impact of pesticides on the environment. In The pesticide question: Environment, economics, and ethics, eds. D. Pimentel and H. Lehman, 13–46. New York: Chapman & Hall.Google Scholar
  41. Eldridge, D.J. 1994. Nests of ants and termites influence infiltration in a semi-arid woodland. Pedobiologia 38:481–492.Google Scholar
  42. Endress, P.K. 1994. Diversity and evolutionary biology of Tropical flowers. Cambridge: Cambridge University Press.Google Scholar
  43. Erdhardt, A. and J.A. Thomas. 1991. Lepidodoptera as indicators of change in semi-natural grasslands of lowland and upland Europe. In The conservation of insects and their habitats, eds. N.M. Collins and J.A. Thomas, 213–236. London: Academic Press.Google Scholar
  44. Fagan, W.F., A.L. Hakim, H. Ariawan, Yuli, and W. Settle. Unpublished manuscript. Intraguild predation in tropical rice agroecosystems.Google Scholar
  45. Fahrig, L. and J.E. Paloheimo. 1987. Interpatch dispersal of the cabbage butterfly. Canadian Journal of Zoology 65:616–622.Google Scholar
  46. Forman, R.T.T., A.E. Galli, and C.F. Leck. 1976. Forest size and avian diversity in New Jersey woodlots with some land use implications. Oecologia 26:1–8.Google Scholar
  47. Free, J.B. 1970. Insect pollination of crops. New York: Academic Press.Google Scholar
  48. Free, J.B. 1982. Bees and mankind. Boston: George Allen and Unwin.Google Scholar
  49. Gaston, K.J. and B.H. McArdle. 1993. All else is not equal: Temporal population variability and insect conservation. In Perspectives on insect conservation, eds. K.J. Gaston, T.R. New, and M.J. Samways, 171–184. Andover: Intercept, Ltd.Google Scholar
  50. Gall, G.A.E. and G.H. Orians. 1992. Agriculture and biological conservation. Agriculture, Ecosystem and Environment 42:1–8.Google Scholar
  51. Gilpin, M.E. and J.M. Diamond. 1980. Subdivision of nature reserves and the maintenance species diversity. Nature 285:567–568.Google Scholar
  52. Groom, M.J. 1994. Quantifying the loss of species due to tropical deforestation. In Principles of Conservation Biology, eds. G.K. Meffe and C.R. Carroll, 121–122. Sunderland, MA: Sinauer Associates.Google Scholar
  53. Groom, M.J. and N. Schumaker. 1992. Evaluating landscape change: Patterns of worldwide deforestation and local fragmentation. In Biotic interactions and global change, eds. P.M. Kareiva, J.G. Kingsolver and R.B. Huey, 24–44. Sunderland, MA: Sinauer Associates.Google Scholar
  54. Gutowski, J.M. 1990. Pollination of the orchid Dactylorhiza fuchsii by longhorn beetles in primeval forests of northeastern Poland. Biological Conservation 51:287–297.Google Scholar
  55. Hafernick, J.E., Jr. 1992. Threats to invertebrate biodiversity: Implications for conservation strategies. In Conservation biology: the theory and practice of nature conservation, preservation and management, eds. P.L. Fiedler and S.K. Jain, 171–194. New York: Chapman & Hall.Google Scholar
  56. Hagen, K.S. and J.M. Franz. 1973. A history of biological control. In History of entomology, eds. R.F. Smith, T.E. Mittler, and C.N. Smith, 433–476. Palo Alto: Annual Reviews, Inc.Google Scholar
  57. Hambler, C. and M.R. Speight. 1996. Extinction rates in British nonmarine invertebrates since 1900. Conservation Biology 10:892–896.Google Scholar
  58. Hammond, P.C. and M.V. Wilson. 1993. Status of the Fender’s blue butterfly. Report to the U.S. Fish and Wildlife Service.Google Scholar
  59. Higgs, A.J. and M.B. Usher. 1984. Should nature reserves be large or small? Nature 285:568–569.Google Scholar
  60. Holldobler, B. and E.O. Wilson. 1990. The ants. Cambridge, MA: Harvard University Press.Google Scholar
  61. Honegger, R.E. 1981. List of amphibians and reptiles either known or thought to have become extinct since 1600. Biological Conservation 19:141–158.Google Scholar
  62. Howarth, F.G. 1991. Environmental impacts of classical biological control. Annual Review of Entomology 36:485–509.Google Scholar
  63. Huffaker, C.B. and P.S. Messenger, eds. 1976. Theory and practice of biological control. San Francisco: Academic Press.Google Scholar
  64. Hughes, R.D., R.E. Jones, and A.P. Gutierrez. 1984. Short-term patterns of population change: the life system approach to their study. In Ecological entomology, eds. C.B. Huffaker and R.L. Rabb, 309–357. New York: John Wiley and Sons.Google Scholar
  65. Hunter, A. 1995. Ecology, life history, and phylogeny of outbreak and nonoutbreak species. In Population dynamics: New approaches and synthesis, eds. N. Cappuccino and P.W. Price, 41–63. San Diego: Academic Press.Google Scholar
  66. Ito, Y. 1980. ComChapautive ecology. Cambridge: Cambridge University Press.Google Scholar
  67. James, R.R., J.C. Miller, and B. Lighthart. 1993. Bacillus thuringiensis var. kurstaki affects a beneficial insect, the cinnabar moth (Lepidoptera: Arctiidae). Journal of Economic Entomology 86: 334–339.Google Scholar
  68. James, R.R., P.B. McEvoy, and C.S. Cox. 1992. Combining the cinnabar moth (Tyria jacobaeae) and the ragwort flea beetle (Longitarsus jacobaeae) for control of ragwort (Senecio jacobaea): an experimental analysis. Journal of Applied Ecology 29: 589–596.Google Scholar
  69. Janzen, D.H. 1971. Euglossine bees as long-distance pollinators of tropical plants. Science 171:203–205.Google Scholar
  70. Janzen, D.H. 1983. No park is an island: Increase in interference from the outside as park size decreases. Oikos 41:402–410.Google Scholar
  71. Jarvinen, O. 1982. Conservation of endangered plant populations: Single large or several small reserves. Oikos 38:301–307.Google Scholar
  72. Jennersten, O. 1988. Pollination in Dianthus deltoïdes (Caryophyllaceae): Effects of habitat fragmentation on visitation and seed set. Conservation Biology 2:359–366.Google Scholar
  73. Johansen, C.A. 1977. Pesticides and pollinators. Annual Review of Entomology 22:177–192.Google Scholar
  74. Johnson, J.B., J.P. McCaffrey, and F. Merickel. 1992. Endemic phytophagous insects associated with yellow starthistle in northern Idaho. Pan-Pacific Entomologist 68: 169–173.Google Scholar
  75. Kalule-Sabiti, J.M.N. 1980. The ecological role of ants (Formicidae) in the ecosystem. African Journal of Ecology 18:113–121.Google Scholar
  76. Kellert, S.R. 1993. Values and perceptions of invertebrates. Conservation Biology 7:845–855.Google Scholar
  77. Kevan, P.G. 1975. Forest application of the insecticide Fenitrothion and its effect on wild bee pollinators (Hymenoptera: Apoidea) of lowbush blueberries (Vaccinium spp.) in southern New Brunswick, Canada. Biological Conservation 7:301–309.Google Scholar
  78. Kevan, P.G. and H.G. Baker. 1984. Insects on flowers. In Ecological entomology, eds. C.B. Huffaker and R.L. Rabb, 607–631. New York: Wiley-Interscience.Google Scholar
  79. Kim, K.C. 1993. Biodiversity, conservation and inventory: Why insects matter. Biodiversity and Conservation 2:191–214.Google Scholar
  80. King, C.M. 1984. Open discussion on biological reserve design. Journal of the Royal Society of New Zealand 14:39–44.Google Scholar
  81. Krimsky, S. and R.P. Wrubel. 1996. Agricultural biotechnology and the environment: Science, policy, and social issues. Urbana: University of Illinois Press.Google Scholar
  82. Kuykentall, K. and T. Kaye 1993. Lupinus sulphureus spp. kincaidii survey and reproductive studies. Report to the Bureau of Land Management and the Oregon Department of Agriculture.Google Scholar
  83. Lahti, R. and E. Ranta. 1986. Island biogeography and conservation: A reply to Murphy and Wilcox. Oikos 47:388–389.Google Scholar
  84. Lawton, J.H. and C.G. Jones. 1995. Linking species and ecosystems: Organisms as ecosystem engineers. In Linking species and ecosystems, eds. C.G. Jones and J.H. Lawton, 141–150. New York: Chapman & Hall.Google Scholar
  85. Leong, K.L.H., M.A. Yoshimura, and H.K. Kaya. 1992. Low susceptibility of overwintering monarch butterflies to Bacillus thurigiensis Berliner. Pan-Pacific Entomology 68:66–68.Google Scholar
  86. Levin, D.A., J. Francisco-Ortega, and R.K. Jansen. 1996. Hybridization and the extinction of rare plant species. Conservation Biology 10:10–16.Google Scholar
  87. Lloyd, D.G. and S.C.H. Barrett, eds. 1996. Floral biology: studies on floral evolution in animal pollinated plants. New York: Chapman & Hall.Google Scholar
  88. Lockwood, J.A. 1993a. Environmental issues involved in biological control of rangeland grassshoppers (Orthoptera: Acrididae) with exotic agents. Environmental Entomology 22:503–518.Google Scholar
  89. Lockwood, J. A. 1993b. Benefits and costs of controlling rangeland grasshoppers (Orthoptera: Acrididae) with exotic organisms: Search for a null hypothesis and regulatory compromise. Environmental Entomology 22:904–914.Google Scholar
  90. Loman, J. and T. von Schantz. 1991. Birds in a farmland—more species in small than large habitat islands. Conservation Biology 5: 176–188.Google Scholar
  91. Luck, R.F., B.M. Shepard, and P.E. Kenmore. 1988. Experimental methods for evaluating arthropod natural enemies. Annual Review of Entomology 33:367–391.Google Scholar
  92. Ludwig, D. 1996. The distribution of population survival times. American Naturalist 147:506–526.Google Scholar
  93. Martin, E.C. and S.E. McGregor. 1973. Changing trends in insect pollination of commercial crops. Annual Review of Entomology 18:207–226.Google Scholar
  94. Matteson, P.C. 1995. The “50% pesticides cuts” in Europe: A glimpse of our future? American Entomologist 41:210–220.Google Scholar
  95. Mattoni, R.H.T. 1990. The endangered El Segundo blue butterfly. Journal of Research on the Lepidoptera 29: 277–304.Google Scholar
  96. Mawdsley, N.A. and N.E. Stork. 1995. Species extinctions in insects: Ecological and biogeographical considerations. In Insects in a changing environment, eds. R. Harrington and N.E. Stork, 322–371. London: Academic Press.Google Scholar
  97. McKenzie, J.A. 1996. Ecological and evolutionary aspects of insecticide resistance. Austin, TX: R.G. Landes Co.Google Scholar
  98. McEvoy, P., C. Cox, and E. Coombs. 1991. Successful biological control of ragwort, Senecio jacobaea, by introduced insects in Oregon. Ecological Applications 1:430–442.Google Scholar
  99. Metcalf, R.L. 1980. Changing role of insecticides in crop protection. Annual Review of Entomology 25: 219–256.Google Scholar
  100. Metcalf, R.L. 1994. Insecticides in pest management. In Introduction to insect pest management, ed. R.L. Metcalf and W.H. Luckmann, 245–314. New York: John Wiley and Sons, Inc.Google Scholar
  101. Metcalf, R.L. and W.H. Luckmann, eds. 1994. Introduction to Insect Pest Management. New York: John Wiley and Sons, Inc.Google Scholar
  102. Metcalf, R.L. and R.A. Metcalf. 1993. Destructive and useful insects: Their habits and control. New York: McGraw-Hill.Google Scholar
  103. Miller, R.L, S.P. Bratton, and P.S. White. 1987. A regional strategy for reserve design and placement based on an analysis of rare and endangered species’ distribution patterns. Biological Conservation 39:255–268.Google Scholar
  104. Murdoch, W.W. 1994. Population regulation in theory and practice. Ecology 75:271–287.Google Scholar
  105. Murdoch, W.W., J. Chesson, and P.L. Chesson. 1985. Biological control in theory and practice. American Naturalist 125:344–366.Google Scholar
  106. Myers, N. 1994. Global biodiversity II: Losses. In Principles of conservation biology, eds. G.K. Meffe and C.R. Carroll, 110–140. Sunderland, MA: Sinauer Associates.Google Scholar
  107. Nafus, D.M. 1993. Movement of introduced biological control agents onto nontarget butterflies, Hypolimnas spp. (Lepidoptera: Nymphalidae). Environmental Entomology 22:265–272.Google Scholar
  108. National Oceanic and Atmospheric Administration (NOAA). 1993. Climatological data annual summary: Oregon. Vol. 99.Google Scholar
  109. National Oceanic and Atmospheric Administration (NOAA). 1994. Climatological data annual summary: Oregon. Vol. 100.Google Scholar
  110. New, T.R. 1991. Butterfly conservation. Oxford: Oxford University Press.Google Scholar
  111. Nilsson, S.G. 1978. Fragmented habitat, species richness and conservation practice. Ambio 7:26–27.Google Scholar
  112. Oates, M.R. 1995. Butterfly conservation within the management of grassland habitats. In The ecology and conservation of butterflies, ed. A.S. Pullin, 98–112. London: Chapman & Hall.Google Scholar
  113. O’Neill, R.V. 1976. Ecosystem persistence and heterotrophic regulation. Ecology 57:1244–1253.Google Scholar
  114. Orians, G.H. and P. Lack. 1992. Arable lands. Agriculture, Ecosystems and Environment 42:101–124.Google Scholar
  115. Osenberg, C.W. and R.J. Schmitt. 1994. Detecting environmental impacts in marine environments. Ecology 4:1–2.Google Scholar
  116. Paoletti, M.G., D. Pimentel, B.R. Stinner, and D. Stinner. 1992. Agroecosystem biodiversity: Matching production and conservation biology. Agriculture, Ecosystems and Environment 40:3–23.Google Scholar
  117. Perkins, J.H. 1982. Insects, experts, and the insecticide crisis. New York: Plenum Press.Google Scholar
  118. Peterken, G.F. 1991. Ecological issues in the management of woodland nature reserves. In The scientific management of temperate communities for conservation, eds. I.F. Spellerberg, F.B. Goldsmith, and M.G. Morris, 245–272. London: Blackwell Scientific Publications.Google Scholar
  119. Picton, H. 1979. The application of insular biogeography theory to the conservation of large mammals in the northern Rocky Mountains. Biological Conservation 15:73–79.Google Scholar
  120. Pimentel, D., H. Acquay, M. Biltonen, P. Rice, M. Silva, J. Nelson, V. Lipner, S. Giordano, A. Horowitz, and M. D’Amore. 1992. Environmental and economic costs of pesticide use. BioScience 42:750–760.Google Scholar
  121. Pimentel, D., E. Garnick, A. Berkowitz, S. Jacobson, S. Napolitano, P. Black, S. Valdes-Cogliano, B. Vinzant, E. Hudes, and S. Littman. 1980. Environmental quality and natural biota. BioScience 30:750–755.Google Scholar
  122. Pimentel, D., L. McLaughlin, A. Zepp, B. Lakitan, T. Kraus, P. Kleinman, F. Vancini, W.J. Roach, E. Graap, W.S. Keeton, and G. Selig. 1991. Environmental and economic effects of reducing pesticide use. Bioscience 41:402–409.Google Scholar
  123. Pimentel, D., L. McLaughlin, A. Zepp, B. Lakitan, T. Kraus, P. Kleinman, F. Vancini, W.J. Roach, E. Graap, W.S. Keeton, and G. Selig. 1993. Environmental and economic impacts of reducing U.S. agricultural pesticide use. In The pesticide question: Environment, economics, and ethics, eds. D. Pimentel and H. Lehman, 223–278. New York: Chapman & Hall.Google Scholar
  124. Pollard, E. and T.J. Yates. 1993. Monitoring butterflies for ecology and conservation: the British monitoring scheme. London: Chapman & Hall.Google Scholar
  125. Prendergast, J.R. and B.C. Eversham. 1995. Butterfly diversity in southern Britain: Hotspot Losses since 1930. Biological Conservation 72:109–114.Google Scholar
  126. Quinn, J.F. and G. Robinson. 1987. The effects of experimental subdivision on flowering plant diversity in California annual grassland. Journal of Ecology 75:837–856.Google Scholar
  127. Quinn, J.F., C.L. Wolin, and M.L. Judge. 1989. An experimental analysis of patch size, habitat subdivision and extinction in a marine intertidal snail. Conservation Biology 3:242–251.Google Scholar
  128. Robertson, P.A., S.A. Clarke, and M.S. Warren. 1995. Woodland management and butterfly diversity. In Ecology and Conservation of Butterflies, ed. A.S. Pullin, 113–134. London: Chapman & Hall.Google Scholar
  129. Samways, M.J. 1994. Insect conservation biology. London: Chapman & Hall.Google Scholar
  130. Samways, M.J. 1995. Southern hemisphere insects: Their variety and the environmental pressures upon them. In Insects in a changing environment, eds. R. Harrington and N.E. Stork, 298–321. London: Academic Press.Google Scholar
  131. Schoenly, K., J.E. Cohen, K.L. Heong, J.A. Litsinger, G.B. Aquino, A.T. Barrion, and G. Arida. 1996. Food web dynamics of irrigated rice fields at five elevations in Luzon, Philippines. Bulletin of Entomological Research 86: 451–466.Google Scholar
  132. Schultz, C.B. 1995. Status of the Fender’s blue butterfly (Icaricia icarioide s fenderi) in Lane County, Oregon: A Year of Declines. Report to the U.S. Fish and Wildlife Service.Google Scholar
  133. Schultz, C.B. 1996. Status of the Fender’s blue butterfly (Icaricia icarioides fenderi) in Lane County, Oregon: A Year of Declines. Report to the U.S. Fish and Wildlife ServiceGoogle Scholar
  134. Schultz, C.B. In review. The role of dispersal behavior in designing reserves for a rare Oregon butterfly. Conservation Biology. Google Scholar
  135. Secord, D. and P. Kareiva. 1996. Perils and pitfalls in the host specificity Chapaudigm. BioScience 46:448–453Google Scholar
  136. Settle, W.H., H. Ariawan, E.T. Astuti, W. Cahyana, A.L. Hakim, D. Hindayana, A.S. Lestari, et al. In press. Managing rice pests through complexes of generalist natural enemies: an alternative to the single species approach. Ecology. Google Scholar
  137. Shaffer, M. 1987. Minimum viable populations: coping with uncertainty. In Viable populations for conservation, ed. M.E. Soulé, 69–86. Cambridge: Cambridge University Press.Google Scholar
  138. Shaw, F.R. 1941. Bee poisoning: A review of the more important literature. Journal of Economic Entomology 34:16–21.Google Scholar
  139. Shreeve, T.G. 1992. Monitoring butterfly numbers. In The ecology of butterflies in Britain, ed. R.L.H. Dennis, 120–138. Oxford: Oxford University Press.Google Scholar
  140. Sibatani, A. 1990. Decline and conservation of butterflies in Japan. Journal of Research on the Lepidoptera 29:305–315.Google Scholar
  141. Simberloff, D. 1974. Equilibrium theory of island biogeography and ecology. Annual Review of Ecology and Systematics 5:165–182.Google Scholar
  142. Simberloff, D. 1982. Big advantages of small refuges. Natural History 91:6–14.Google Scholar
  143. Simberloff, D. 1988. The contribution of population and community biology to conservation science. Annual Review of Ecology and Systematics 19:473–511.Google Scholar
  144. Simberloff, D. and L.G. Abele. 1976. Island biogeography theory and conservation practice. Science 191:285–6.Google Scholar
  145. Simberloff, D. and N. Gotelli. 1984. Effects of insularization on plant species richness in the prairieforest ecotone. Biological Conservation 29:27–40.Google Scholar
  146. Sipes, S.D. and V.J. Tepedino. 1995. Reproductive biology of the rare orchid, Spiranthes diluviatisi Breeding system, pollination, and implications for conservation. Conservation Biology 9:929–938.Google Scholar
  147. Soulé, M.E. and D. Simberloff. 1986. What do genetics and ecology tell us about the design of nature reserves? Biological Conservation 35:19–40.Google Scholar
  148. Southwick, E.E. and L. Southwick, Jr. 1992. Estimating the economic value of honey bees (Hymenoptera: Apidae) as agricultural pollinators in the United States. Journal of Economic Entomology 85:621–633.Google Scholar
  149. Stewart-Oaten, A., J. Bence, and C. Osenberg. 1992. Assessing effects of unreplicated perturbations: no simple solutions. Ecology 73:1396–1404.Google Scholar
  150. Surgeoner, G.A. and W. Roberts. 1993. Reducing pesticide use by 50% in the province of Ontario: challenges and progress. In The pesticide question: environment, economics, and ethics, eds. D. Pimentel and H. Lehman, 206–222. New York: Chapman & Hall.Google Scholar
  151. Temple, S.A. and J.R. Cary. 1988. Modeling dynamics and habitat-interior bird populations in fragmented landscapes. Conservation Biology 2:340–346.Google Scholar
  152. Tepedino, V.J. 1979. The importance of bees and other insect pollinators in maintaining floral species composition. Great Basin Naturalist Memoirs 3:139–150.Google Scholar
  153. Terborgh, J. 1976. Island biogeography and conservation: Strategy and limitations. Science 193:1029–1030.Google Scholar
  154. Thomas, C.D. 1985. The status and conservation of the butterfly Plebejus argus L. (Lepidoptera:Lycaenidae) in north west Britain. Biological Conservation 33:29–51.Google Scholar
  155. Thomas, J.A. 1983. The ecology and conservation of Lysandra bellargus (Lepidoptera: Lycaenidae) in Britain. Journal of Applied Ecology 20:59–83.Google Scholar
  156. Thomas, J.A. 1984a. The behavior and habitat requirements of Maculinea nausithous (the dusky large blue butterfly) and M. teleius (the scarce large blue) in France. Biological Conservation 28:325–347.Google Scholar
  157. Thomas, J.A. 1984b. The conservation of butterflies in temperate countries: Past efforts and lessons for the future. In The biology of butterflies, eds. R.I. Vane-Wright and P.R. Ackery, 333–354. London: Academic Press.Google Scholar
  158. Thomas, J.A. 1991. Rare species conservation: Case studies of European butterflies. In The scientific management of temperate communities for conservation, eds. I.F. Spellerberg, F.B. Goldsmith, and M.G. Morris, 149–157. London: Blackwell Scientific Publications.Google Scholar
  159. Thomas, J.A. 1995. The colony and conservation of Maculinea arion and other European species of large blue butterfly. In Ecology and conservation of butterflies, ed. A.S. Pullin, 180–197. London: Chapman & Hall.Google Scholar
  160. Thomas, J.A., C.D. Thomas, D.J. Simcox, and R.T. Clarke. 1986. The ecology and declining status of the silver-spotted skipper butterfly (Hesperia comma) in Britain. Journal of Animal Ecology 23:365–380.Google Scholar
  161. Thompson, J.N. 1994. The revolutionary process. Chicago: The University of Chicago Press.Google Scholar
  162. Tisdell, C.A. 1990. Economic impact of biological control of weeds and insects. In Critical issues in biological control, eds. M. Mackauer, L.E. Ehler, and J. Roland, 301–316. Andover, UK: Intercept.Google Scholar
  163. Underwood, A.J. 1994. On beyond BACI: Sampling designs that might reliably detect environmental disturbances. Ecology 4:3–15.Google Scholar
  164. U.S. Congress, Office of Technology Assessment. 1995. Biologically based technologies for pest control, OTA-ENV-636. Washington, D.C.: U.S. Government Printing Office.Google Scholar
  165. Usher, M.B. 1995. A world of change: Land-use patterns and arthropod communities. In Insects in a changing environment, eds. R. Harrington and N.E. Stork, 372–399. London: Academic Press.Google Scholar
  166. Vandermeer, J. 1989. The ecology of intercropping. New York: Cambridge University Press.Google Scholar
  167. Vandermeer, J. 1994. The ecological basis of alternative agriculture. Annual Review of Ecology and Systematics 26:201–224.Google Scholar
  168. Van Driesche, R.G. and T.S. Bellows, Jr. 1996. Biological control. New York: Chapman and Hall.Google Scholar
  169. Van Hook, T. 1994. The conservation challenge in agriculture and the role of entomologists. Florida Entomologist 77: 42–73.Google Scholar
  170. Waage, J.K. 1991. Biodiversity as a resource for biological control. In The biodiversity of microorganisms and invertebrates: its role in sustainable agriculture, ed. D.L. Hawksworth, 149–163. Wallingford, UK: CAB International.Google Scholar
  171. Warren, M.S. 1993. A review of butterfly conservation in central southern Britain: I. Protection evaluation and extinction on prime sites. Biological Conservation 64: 25–35.Google Scholar
  172. Warren, M.S., E. Pollard, and T.J. Bibby. 1986. Annual and long-term changes in a population of the wood white butterfly Leptidea sinapsis. Journal of Animal Ecology 55:707–719.Google Scholar
  173. Waterhouse, D.F. 1974. The biological control of dung. Scientific American 230:100–109.Google Scholar
  174. Watt, W.B., F.S. Chew, L.R.G. Snyder, A.G. Watt, and D.E. Rothschild. 1977. Population structure in pierid butterflies: I. Numbers and movements of some montane species. Oecologia 27:1–22.Google Scholar
  175. Watt, W.B., D. Han, and B.E. Tabashnik. 1979. Population structure of pierid butterflies II: A “native” population of Colias philodice eriphyle in Colorado. Oecologia 44:44–52.Google Scholar
  176. Way, M.J. and K.L. Heong. 1994. The role of biodiversity in the dynamics and management of insect pests of tropical irrigated rice—a review. Bulletin of Entomological Research 84:567–587.Google Scholar
  177. Webb, N.R. 1990. Changes on the heathlands of Dorset England between 1978 and 1987. Biological Conservation 51:273–286.Google Scholar
  178. Webb, N.R. and J.A. Thomas. 1994. Conserving insect habitats in heathland biotopes: a question of scale. In Large-scale ecology and conservation biology, eds. P.J. Edwards, R.M. May and N.R. Webb, 129–152. London: Blackwell Scientific Publications.Google Scholar
  179. Western, D. 1989. Conservation without parks: Wildlife in the rural landscape. In Conservation for the twenty-first century, eds. D. Western and M. Pearl, 158–165. New York: Oxford University Press.Google Scholar
  180. Williams, G.R. 1984. Has island biogeography theory any relevance to the design of biological reserves in New Zealand? Journal of the Royal Society of New Zealand 14:7–10.Google Scholar
  181. Wilson, E.O. 1987. The little things that run the world. Conservation Biology 1:344–346.Google Scholar
  182. Wilson, E.O. 1985. The biological diversity crisis. BioScience 35:700–706.Google Scholar
  183. Wilson, M.V. and D.L. Clark. 1995. Effects of fire and fire fighting techniques on Fender’s blue butterfly and Kincaid’s lupine. Report to Western Oregon Refuges, U.S. Fish and Wildlife Service.Google Scholar
  184. Wood, G.W. 1979. Recuperation of native bee populations in blueberry fields exposed to drift of fenitrothion from forest spray operations in New Brunswick. Journal of Economic Entomology 72:36–39.Google Scholar
  185. Woolhouse, M.E.J. 1987. On species richness and nature reserve design: An empirical study of U.K. woodland avifauna. Biological Conservation 40:167–178.Google Scholar
  186. Wright, S.J. and S.P. Hubbell. 1983. Stochastic extinction and reserve design: A focal species approach. Oikos 41:466–476.Google Scholar

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© Springer Science+Business Media Dordrecht 1998

Authors and Affiliations

  • Cheryl B. Schultz
  • Gary C. Chang

There are no affiliations available

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