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Testing Bergmann's rule in marine copepods
Campbell, M.D.; Schoeman, D.S.; Venables, W.; Abu‐Alhaija, R.; Batten, S.D.; Chiba, S.; Coman, F.; Davies, C.H.; Edwards, M.; Eriksen, R.S.; Everett, J.D.; Fukai, Y.; Fukuchi, M.; Esquivel-Garrote, O.; Hosie, G.; Huggett, J.A.; Johns, D.G.; Kitchener, J.A.; Koubbi, P.; McEnnulty, F.R.; Muxagata, E.; Ostle, C.; Robinson, K.V.; Slotwinski, A.; Swadling, K.M.; Takahashi, K.T.; Tonks, M.; Uribe-Palomino, J.; Verheye, H.M.; Wilson, W.H.; Worship, M.M.; Yamaguchi, A.; Zhang, W.; Richardson, A.J. (2021). Testing Bergmann's rule in marine copepods. Ecography 44(9): 1283-1295. https://dx.doi.org/10.1111/ecog.05545
In: Ecography. Munksgaard International: Copenhagen. ISSN 0906-7590; e-ISSN 1600-0587
Peer reviewed article  
Available in  Authors 
Keyword
    Marine/Coastal
Author keywords
    allometry; chlorophyll; continuous plankton recorder; ectotherms; environmental drivers; invertebrate; macroecology; statistical modelling; temperature-size rule; zooplankton
Authors  Top 
  • Campbell, M.D.
  • Schoeman, D.S.
  • Venables, W.
  • Abu-Alhaija, R.
  • Batten, S.D.
  • Chiba, S.
  • Coman, F.
  • Davies, C.H.
  • Edwards, M.
  • Eriksen, R.S.
  • Everett, J.D.
  • Fukai, Y.
  • Fukuchi, M.
  • Esquivel-Garrote, O.
  • Hosie, G.
  • Huggett, J.A.
  • Johns, D.G.
  • Kitchener, J.A.
  • Koubbi, P., more
  • McEnnulty, F.R.
  • Muxagata, E.
  • Ostle, C.
  • Robinson, K.V.
  • Slotwinski, A.
  • Swadling, K.M.
  • Takahashi, K.T.
  • Tonks, M.
  • Uribe-Palomino, J.
  • Verheye, H.M.
  • Wilson, W.H.
  • Worship, M.M.
  • Yamaguchi, A.
  • Zhang, W.
  • Richardson, A.J.
Abstract
    Macroecological relationships provide insights into rules that govern ecological systems. Bergmann's rule posits that members of the same clade are larger at colder temperatures. Whether temperature drives this relationship is debated because several other potential drivers covary with temperature. We conducted a near-global comparative analysis on marine copepods (97 830 samples, 388 taxa) to test Bergmann's rule, considering other potential drivers. Supporting Bergmann's rule, we found temperature better predicted size than did latitude or oxygen, with body size decreasing by 43.9% across the temperature range (-1.7 to 30ºC). Body size also decreased by 26.9% across the range in food availability. Our results provide strong support for Bergman's rule in copepods, but emphasises the importance of other drivers in modifying this pattern. As the world warms, smaller copepod species are likely to emerge as ‘winners', potentially reducing rates of fisheries production and carbon sequestration.
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