Abstract
Our ignorance about the world’s organisms is astonishing. For many species, we do not even know whether they are rare or common. For others, the fact that they are rare is the most significant piece of information we have. In a small number of cases, we know how rare a species is and also have a good knowledge of its life history, ecology or behaviour. When we have this information about a whole group of species, we can ask what categories of species tend to be rare, merely by tallying the characteristics of known rare species. Such tallies have their uses but, for two reasons, they may not necessarily reveal what features of the species are the cause of their rarity. First, variables that are correlated with rarity could equally well be causes or consequences of that rarity and we must be careful in deciding between these alternatives. Second, correlations found between two or more variables that are measured across species may be coincidental artefacts of the methods used and not true evolutionary correlations, by which we mean that the two characters have evolved together on a number of independent occasions. The first problem is undoubtedly complex and difficult but it can occasionally be overcome. Towards the end of the chapter we will demonstrate how. However, this chapter is mainly about solving the second problem — how to identify evolutionary correlations.
Over the next several decades, actions will need to be taken towards preserving the many species now facing extinction. Unfortunately, this will be done in the context of enormous ignorance about most of these species.
G. Mace, 1995
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References
Anon. (1990) Reader’s Digest Complete Book of Australian Birds, Reader’s Digest, Sydney.
Barker, R.D. and Vestjens, W.J.M. (1990) The Food of Australian Birds, Vols 1–2, CSIRO, Melbourne.
Blakers, M., Davies, S.J.J.F. and Reilly, P.N. (1984) The Atlas of Australian Birds, Melbourne University Press, Melbourne.
Burt, A. (1989) Comparative methods using phylogenetically independent contrasts. Oxford Surveys in Evolutionary Biology, 6, 33–53.
Collar, N.J. and Andrew, P. (1988) Birds to Watch: The ICBP World Checklist of Threatened Birds, ICBP, Cambridge.
Cotgreave, P. (1994) Patterns in species abundances. Science Progress, 77, 57–69.
Cotgreave, P. (1995) Population density, body mass and niche overlap in Australian birds. Functional Ecology, 9, 285–289.
Cotgreave, P. and Harvey, P.H. (1991) Bird community structure. Nature, 353, 123.
Cotgreave, P. and Harvey, P.H. (1992) Relationships between body size, abundance and phylogeny in bird communities. Functional Ecology, 6, 248–256.
Cotgreave, P. and Harvey, P.H. (1994) Biogeographic and phylogenetic association with bird species diversity. Biodiversity Letters, 2, 46–55.
Felsenstein, J. (1985) Phylogenies and the comparative method. American Naturalist, 125, 1–15.
Grafen, A. (1989) The phylogenetic regression. Philosophical Transactions of the Royal Society of London, B, 326, 119–156.
Grafen, A. (1992) The uniqueness of the phylogenetic regression. Journal of Theoretical Biology, 156, 405–423.
Groombridge, B. (1994) 1994 1UCN Red List of Threatened Animals, IUCN, Cambridge.
Harvey, P.H. and Pagel, M.D. (1991) The Comparative Method in Evolutionary Biology, Oxford University Press, Oxford.
IUCN (1986) The 1986 IUCN Red List of Threatened Mammals, International Union for the Conservation of Nature and Natural Resources, Gland, Switzerland.
King, W.B. (1981) Endangered Birds of the World: The ICBP Bird Red Data Book, Smithsonian Institution Press, Washington, DC.
Lawton, J.H. (1993) Range, population abundance and conservation. Trends in Ecology and Evolution, 8, 409–413.
Letcher, A.J. and Harvey, P.H. (1994) Variation in the geographical range size among mammals of the Palearctic. American Naturalist, 144, 30–42.
Mace, G.M. (1995) Classification of threatened species and its role in conservation planning in Extinction rates (eds J.H. Lawton and R.M. May), Oxford University Press, Oxford, pp. 197–213.
Maddison, W.P. (1990) A method for testing the correlated evolution of two binary characters: are gains and losses concentrated on certain branches of a phylogenetic tree? Evolution, 44, 539–557.
Martins, E.P. and Garland, T.H. (1991) Phylogenetic analyses of the correlated evolution of continuous characters: a simulation study. Evolution, 45, 534–557.
Mooers, A.O. and Cotgreave, P. (1994) Sibley and Ahlquist’s tapestry dusted off. Trends in Ecology and Evolution, 9, 458–459.
Nee, S., Read, A.F., Greenwood, J.J.D. and Harvey, P.H. (1991) The relationship between abundance and body size in British birds. Nature, 351, 312–313.
Pagel, M. (1992) A method for the analysis of comparative data. Journal of Theoretical Biology, 156, 431–442.
Pagel, M. (1993) Seeking the evolutionary regression coefficient: an analysis of what comparative methods measure. Journal of Theoretical Biology, 164, 191–205.
Pagel, M. (1994) Detecting correlated evolution on phylogenies: a general method for the comparative analysis of discrete characters. Proceedings of the Royal Society of London, Series B, 255, 37–45.
Pagel, M. and Harvey, P.H. (1988) Recent developments in the analysis of comparative data. Quarterly Review of Biology, 63, 413–440.
Pennant, T. (1768) British Wildlife, Vols. 1–3, Benjamin White, London.
Purvis, A. (1992) Comparative methods: theory and practice. DPhil. Thesis, University of Oxford.
Purvis, A., Gittleman, J.L. and Luh, H.-K. (1994) Truth or consequences: effects of phylogenetic accuracy on two comparative methods. Journal of Theoretical Biology, 167, 293–300.
Ridley, M. (1983) The Explanation of Organic Diversity: the comparative method and adaptations for mating, Oxford University Press, Oxford.
Sibley, C.G. and Ahlquist, J.E. (1990) Phylogeny and Classification of Birds: a study in molecular evolution, Yale University Press, New Haven.
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Cotgreave, P., Pagel, M. (1997). Predicting and understanding rarity: the comparative approach. In: Kunin, W.E., Gaston, K.J. (eds) The Biology of Rarity. Population and Community Biology Series, vol 17. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-5874-9_13
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