Abstract
Using published distributions of 65 species from the British Isles and northern Europe, we show that ant assemblages change with latitude in two ways. First, as commonly found for many types of organisms, the number of ant species decreased significantly with increasing latitude. For Ireland and Great Britain, species richness also increased significantly with region area. Second, although rarely demonstrated for ectotherms, the body size of ant species, as measured by worker length, increased significantly with increasing latitude. We found that this body-size pattern existed in the subfamily Formicinae and, to a lesser extent, in the Myrmicinae, which together comprised 95% of the ant species in our study area. There was a trend for formicines to increase in size with latitude faster than myrmicines. We also show that the pattern of increasing body size was due primarily to the ranges of ant species shifting to higher latitudes as their body sizes increased, with larger formicines becoming less represented at southerly latitudes and larger myrmicines becoming more represented at northerly latitudes. We conclude by discussing five potential mechanisms for generating the observed body-size patterns: the heat-conservation hypothesis, two hypotheses concerning phylogenetic history, the migration-ability hypothesis, and the starvation-resistance hypothesis.
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References
Baroni Urbani C, Collingwood CA (1976) A numerical analysis of the distribution of British Formicidae (Hymenoptera, Aculeata). Verhandl Naturf Ges Basel 85: 51–91
Baroni Urbani C, Collingwood CA (1977) The zoogeography of ants (Hymenoptera, Formicidae) in northern Europe. Acta Zool Fenn 152: 1–34
Barrett KEJ (1979) Provisional Atlas of the Insects of the British Isles. Part 5. Hymenoptera: Formicidae. Biological Records Centre, Institute of Terrestrial Ecology, Monks Wood Experimental Station, Huntingdon
Bergmann C (1947) Über die Verhältnisse der Wärmeökonomie der Tiere zu ihrer Gröe. Göttinger Studien 1: 595–708
Blau WS (1981) Latitudinal variation in the life histories of insects occupying disturbed habitats: a case study. In: Dingle H, Denno RF (eds) Insect Life History Patterns; Habitat and Geographic Variation. Springer, New York, pp. 75–96
Boyce MS (1978) Climatic variability and body size variation in muskrats (Ondatra zibethicus) of North America. Oecologia 36: 1–19
Brian MV (1973) Social Insects: Ecology and Behavioural Biology. Chapman and Hall, London
Brodie PF (1975) Cetacean energetics; an overview of intraspecific size variation. Ecology 56: 152–161
Brown JH (1981) Two decades of homage to Santa Rosalia: towards a general theory of diversity. Amer Zool 21: 877–888
Brown JH, Lee AK (1969) Bergmann's rule and climatic adaptation in woodrats (Neotoma). Evolution 23: 329–338
Brown JH, Maurer B (1989) Macroecology: the division of food and space among species on continents. Science 243: 1145–1150
Calder WA (1984) Size, Function, and Life History. Harvard University Press, Cambridge
Collingwood CA (1979) The Formicidae (Hymenoptera) of Fennoscandia and Denmark. Fauna Entomologica Scandinavica, Vol. 8. Scandinavian Science Ltd. Klampenborg, Denmark
Coope GR (1986) The invasion and colonization of the North Atlantic islands: a paleoecological solution to a biogeographic problem. Phil Trans R Soc Lond 314: 619–635
Cousins SH (1989) Species richness and energy theory. Nature (London) 340: 350–351
Forsman A (1991) Variation in sexual size dimorphism and maximum body size among Adder populations: effect of prey size. J Anim Ecol 60: 253–267
Geist V (1987) Bergmann's rule is invalid. Can J Zool 65: 1035–1038
Godwin H (1975) The history of the British flora. Cambridge University Press
Goulden CE, Hornig LL (1980) Population oscillations and energy reserves in planktonic Cladocera and their consequences to competition. Proc Nat Acad Sci 77: 1716–1720
Hölldöbler B, Wilson EO (1990) The Ants. Harvard University Press. Cambridge, MA
James FC (1970) Geographic size variation in birds and its relationship to climate. Ecology 51: 365–390
Jeanne RL (1979) A latitudinal gradient in rates of ant predation. Ecology 60: 1211–1224
Kondoh M (1977) On the difference of vitality among workers ants under starvation. Proc Eighth Intern Congr Intern Union Social Insects (Wageningen). pp 69–70
Kusnezov V (1957) Numbers of species of ants in faunae of different latitudes. Evolution 11: 298–299
Lawton JH (1990) Specles richness and population dynamics of animal assemblages: patterns in body size: abundance space. Phil Trans R Soc Lond 330: 283–291
Lindsey CC (1966) Body sizes of poikilotherm vertebrates at different latitudes. Evolution 20: 456–465
Lindstedt SL, Boyce MS (1985) Seasonality, fasting endurance, and body size in mammals. Am Nat 125: 873–878
MacArthur RH (1972) Geographical Ecology. Harper & Row Publishers, New York
Manly BFJ (1991) Randomization and Monte Carlo methods in biology. Chapman and Hall, New York
Manly BFJ (1992) The design and analysis of research studies. Cambridge University Press, Oxford
Mayr E (1956) Geographical character gradients and climatic adaptation. Evolution 10: 105–108
McMahon TA, Banner JT (1983) On size and life. WH Freeman and Company, New York
McNab BK (1971) On the ecological significance of Bergmann's Rule. Ecology 52: 845–854
Murphy EC (1985) Bergmann's rule, seasonality, and geographic variation in body size of house sparrows. Evolution 39: 1327–1334
Payne CD, ed (1987) The GLIM system, release 3.77 (second edition). Numerical Algorithms Group, Oxford
Peters RH (1983) Ecological Implications of Body Size. Cambridge University Press, Cambridge
Ray C (1960) The application of Bergmann's and Allen's rule to the poikilotherms. J Morph 106: 85–109
Schmidt-Neilsen K (1984) Scaling: why is animal size so important? Cambridge University Press, Cambridge
Schoener TW, Janzen DH (1968) Notes on environmental determinants of tropical versus temperate insect size patterns. Am Nat 102: 207–224
Scholander PF (1955) Evolution of climatic adaptation in homeotherms. Evolution 9: 15–26
Scholander PF (1956) Climatic rules. Evolution 10: 339–340
Searcy WA (1980) Optimum body size at different ambient temperatures: an energetics explanation of Bergmann's rule. J Theor Biol 83: 579–593
Threlkeld ST (1976) Starvation and the size structure of zooplankton communities. Fresh Biol 6: 489–496
Turner JRG, Lennon JJ (1989) Species richness and energy theory. Nature (London) 340: 351
Wright DH (1983) Species-energy theory: an extension of speciesarea theory. Oikos 41: 496–506
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Cushman, J.H., Lawton, J.H. & Manly, B.F.J. Latitudinal patterns in European ant assemblages: variation in species richness and body size. Oecologia 95, 30–37 (1993). https://doi.org/10.1007/BF00649503
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DOI: https://doi.org/10.1007/BF00649503