Abstract
The vast majority of contemporary extinctions can be viewed as anthropogenous in the sense that human activity greatly reduced population sizes and extinction would not likely have occurred now without the human activity. However, one would still wish to know why small populations, even when protected from further human interference, appear to be unusually prone to extinction. Empirical data on the last gasp of such declining species are almost nonexistent but there is evidence that four forces conspire to put small populations at increased risk: demographic stochasticity, genetic deterioration, social dysfunction, and extrinsic forces. There are presently no models that accurately apportion the threat of extinction among these forces and even the available guidelines for indicating which species are especially at risk are very imprecise.
Well, ther’ ain’t no sense in it. A body might stump his toe, and take pison, and fall down the well, and break his neck, and bust his brains out, and somebody come along and ask what killed him, and some numskull up and say, “Why, he stumped his toe.” Would ther’ be any sense in that? No.
— Mark Twain The Adventures of Huckleberry Finn
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References
Abele LG, Connor EF (1979) Application of island biogeography theory to refuge design: Making the right decision for the wrong reasons. In: Proceedings of the first conference on scientific research in the National Parks, ed Linn RM, vol I. Washington, DC: U.S. Department of the Interior, pp 89–94
Allen AA (1934) Sex rhythm in the ruffed grouse (Bonasa umbellus Linn.) and other birds. Auk 51: 180–199
Allen AA, Kellogg PP (1937) Recent observations on the ivory-billed woodpecker. Auk 54: 164–184
Baker HG, Stebbins GL (1965) The genetics of colonizing species. New York: Academic
Beardmore JA (1983) Extinction, survival, and genetic variation. In: Genetics and conservation, eds Schonewald-Cox CM, Chambers SM, MacBryde B, Thomas L. Menlo Park, CA: Benjamin/Cummings, pp 125–151
Bengston S-A (1984) Breeding ecology and extinction of the great auk (Pinguinus im- pennis): Anecdotal evidence and conjectures. Auk 101: 1–12
Bent AC (1932) Life histories of north american gallinaceous birds. Smithsonian Institution United States National Museum Bulletin 162. Washington, DC: U.S. National Museum
Berry RJ (1971) Conservation aspects of the genetical constitution of populations. In: The scientific management of animal and plant communities for conservation, eds Duffy E, Watt AS. Oxford: Blackwell, pp 177–206
Berry RJ, Tricker JK (1969) Competition and extinction: The mice of Foula, with notes on those of Fair Isle and St. Kilda. J Zool Lond 158: 247–265
Bowman JC, Falconer DS (1960) Inbreeding depression and heterosis of litter sizes in mice. Genet Res 1: 262–274
Cade TJ (1983) Hybridization and gene exchange among birds in relation to conservation. In: Genetics and conservation, eds Schonewald-Cox CM, Chambers SM, MacBryde B, Thomas L. Menlo Park, CA: Benjamin/Cummings, pp 288–310
Daly M, Wilson M (1978) Sex, evolution, and behavior. North Scituate, MA: Duxbury
Diamond JM (1984) “Normal” extinctions of isolated populations. In: Extinctions, ed Nitecki MH. Chicago: University of Chicago Press, pp 191–246
Drury WH (1974) Rare species. Biol Conserv 6: 162–169
Ehrlich PR (1983) Genetics and the extinction of butterfly populations. In: Genetics and conservation, eds Schonewald-Cox CM, Chambers SM, MacBryde B, Thomas L. Menlo Park, CA: Benjamin/Cummings, pp 152–163
Ehrlich PR, Breedlove DE, Brussard PF, Sharp MA (1972) Weather and the “regulation” of subalpine populations. Ecology 53: 243–247
Ehrlich PR, Ehrlich AH (1981) Extinction: The causes and consequences of the disappearance of species. New York: Random House
Fisher J (1948) St. Kilda, a natural experiment. New Nat J 1: 91–108
Fisher J, Simon N, Vincent J (1969) Wildlife in danger. New York: Viking
Fitter R (1968) Vanishing wild animals of the world. New York: Frankl in Watts
Fjeldsä J (1984) Three endangered South American grebes (Podiceps): Case histories and the ethics of saving species by human intervention. Ann Zool Fennici 21: 411–416
Frankel OH, Soule ME (1981) Conservation and evolution. Cambridge: Cambridge University Press
Franklin IR (1980) Evolutionary change in small populations. In: Conservation biology: an evolutionary-ecological perspective, eds Soule ME, Wilcox BA. Sunderland, MA: Sinauer, pp 135–150
Grainger D (1978) Animals in peril. Toronto: Pagurian
Greenwood JC (1967) Extinct and vanishing birds of the world, 2nd ed New York: Dover
Halliday T (1978) Vanishing birds. New York: Holt, Rinehard, and Winston
Hedrick PW (1983) Genetics of populations. Boston: Science Books International
Hillinger C (1980) Proposed bird cross-breeding stirs furor. Los Angeles Times, Oct 19, 1980, part 1, pp 14–15
James FC (1980) Miscegenation in the seaside sparrow? Bioscience 30: 800–801
Lewontin RC (1965) Selection for colonizing ability. In: The genetics of colonizing species, eds Baker HG, Stebbins GL. New York: Academic Press, pp 79–94
Lidicker WZ (1966) Ecological observations on a feral house mouse population declining to extinction. Ecol Monogr 36: 27–50
MacArthur RH, Wilson EO (1967) The theory of island biogeography. Princeton, NJ: Princeton University Press
May RM (1973) Stability and complexity in model ecosystems. Princeton University Press: Princeton University Press
McClintock MK (1971) Menstrual synchrony and suppression. Nature 229: 244–245
Mertz DB (1971) The mathematical demography of the California condor population. Am Nat 105: 437–454
Peden AE (1973) Virtual extinction of Gambusia amistadensis nsp., a poeciliid fish from Texas. Copeia 1973 (2): 210–221
Post W, Antonio FB (1981) Breeding and rearing of seaside sparrows (Ammospiza maritima) in captivity. Intl Zoo Yrbk 21: 123–128
Rabinowitz D (1981) Seven forms of rarity. In: The biological aspects of rare plant conservation, ed Synge H. London: Wiley, pp 205–217
Ralls K, Ballou J (1983) Extinction: Lessons from zoos. In: Genetics and conservation, eds Schonewald-Cox CM, Chambers SM, McBryde B, Thomas L. Menlo Park, CA: Benjamin/Cummings, pp 164–184
Richter-Dyn N, Goel NS (1972) On the extinction of a colonizing species. Theoret Pop Biol 3: 406–433
Segerberg O Jr (1971) Where have all the flowers, fishes, birds, trees, water, and air gone? New York: David McKay
Senner JW (1980) Inbreeding depression and the survival of zoo populations. In: Conservation biology: an evolutionary-ecological perspective, eds Soulé ME, Wilcox BA. Sunderland, MA: Sinauer, pp 209–224
Shaffer ML (1981) Minimum population sizes for species conservation. Bioscience 31: 131–134
Shaffer ML, Samson FB (1985) Population size and extinction: a note on determining critical population sizes. Am Nat 125: 144–152
Simberloff D (1981) Community effects of introduced species. In: Biotic crises in ecological and evolutionary time, ed Nitecki MH. New York: Academic Press, pp 53–82
Simon N, Géroudet P (1970) Last survivors. New York: World Publishing Co
Soulé ME (1980) Thresholds for survival: maintaining fitness and evolutionary potential. In: Conservation biology: an evolutionary-ecological perspective, eds Soule ME, Wilcox BA. Sunderland, MA: Sinauer, pp 151–170
Soulé ME (1983) What do we really know about extinction? In: Genetics and conservation, eds Schonewald-Cox CM, Chambers SM, MacBryde B, Thomas L. Menlo Park, CA: Benjamin/Cummings, pp 111–124
Soulé ME, Simberloff D (1986) What do genetics and ecology tell us about the design of nature reserves? Biol Conserv 35: 19–40
Stanley SM (1979) Macroevolution, pattern and process. San Francisco: WH Freeman
Stewart D (1978) From the edge of extinction. New York: Methuen
Sykes PW Jr (1980) Decline and disappearance of the dusky seaside sparrow from Merritt Island, Florida. Am Birds 34: 728–737
Terborgh J, Winter B (1980) Some causes of extinction. In: Conservation biology: an evolutionary-ecological perspective, eds Soulé ME, Wilcox BA. Sunderland, MA: Sinauer, pp 119–134
Van Valen L (1973) A new evolutionary law. Evol Theory 1: 1–30
Wittenberger JF (1981) Animal social behavior. Boston: Duxbury Press
Ziswiler V (1967) Extinct and vanishing animals. New York: Springer-Verlag
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© 1986 Dr. S. Bernhard, Dahlem Konferenzen
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Simberloff, D. (1986). The Proximate Causes of Extinction. In: Raup, D.M., Jablonski, D. (eds) Patterns and Processes in the History of Life. Dahlem Workshop Reports, vol 36. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-70831-2_14
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DOI: https://doi.org/10.1007/978-3-642-70831-2_14
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