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The crypsis hypothesis explained: a reply to Jayasuriya et al. (2015)

  • Torbjørn R. Paulsen (a1), Louise Colville (a2), Matthew I. Daws (a3), Sigrunn Eliassen (a1), Göran Högstedt (a1), Ilse Kranner (a4), Ken Thompson (a5) and Vigdis Vandvik (a1)...
Abstract
Abstract

In imbibing seeds, resumption of metabolism leads to the unavoidable release of volatile by-products that are perceived as cues by rodent seed predators. The crypsis hypothesis proposes that the primary function of a water-impermeable, hard seed coat is to reduce rodent seed predation by rendering seeds olfactorily cryptic. In an opinion paper, Jayasuriya et al. (2015) find the crypsis hypothesis unscientific and ‘not consistent with Darwin's theory of evolution by natural selection’. It is unfortunate that Jayasuriya et al. (2015) did not appreciate that the crypsis hypothesis offers an alternative explanation for the evolution of water-impermeable seeds: released seed volatiles are cues used by rodents to locate seeds, and variation in seed-coat permeability leading to differences in seed volatile release represents the variable under selection. Furthermore, the sealing of water-impermeable seed coats imposes a cost of increased generation time and, therefore, dormancy-release mechanisms are expected to subsequently evolve in response to local environmental conditions. We also disagree with most other claims by Jayasuriya et al. (2015), who failed to appreciate how species with dimorphic seeds – one morph with permeable and the other with impermeable seed coats – benefit from rodent caching behaviour and population dynamics. We welcome this opportunity to clarify and elaborate on key features and the evolution of water-impermeable seed coats according to the crypsis hypothesis.

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Copyright
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.
Corresponding author
*Correspondence E-mail: torbjorn.paulsen@bio.uib.no
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S. Darley-Hill and W.C. Johnson (1981) Acorn dispersal by the Blue jay (Cyanocitta cristata). Oecologia 50, 231232.

C.J. Downs and S.B. Vander Wall (2009) High relative humidity increases pilfering success of yellow pine chipmunks. Journal of Mammalogy 90, 796802.

J.A. Endler and P.W. Mielke (2005) Comparing entire colour patterns as birds see them. Biological Journal of the Linnean Society 86, 405431.

J.L. Hollander , S.B. Vander Wall and W.S. Longland (2012) Olfactory detection of caches containing wildland versus cultivated seeds by granivorous rodents. Western North American Naturalist 72, 339347.

W.E. Howard and R.E. Cole (1967) Olfaction in seed detection by deer mice. Journal of Mammalogy 48, 147150.

P.E. Hulme (1998) Post-dispersal seed predation and seed bank persistence. Seed Science Research 8, 513519.

A.F.G. Jacobs , B.G. Heusinkveld and S.M. Berkowicz (1999) Dew deposition and drying in a desert system: a simple simulation model. Journal of Arid Environments 42, 211222.

L.F. Jacobs (1992) Memory for cache locations in Merriam's kangaroo rats. Animal Behaviour 43, 585593.

L.F. Jacobs and E.R. Liman (1991) Grey squirrels remember the locations of buried nuts. Animal Behaviour 41, 103110.

T.K. Johnson and C.D. Jorgensen (1981) Ability of desert rodents to find buried seeds. Journal of Range Management 34, 312314.

K.A. Jones , J.R. Krebs and M.J. Whittingham (2006) Interaction between seed crypsis and habitat structure influences patch choice in a granivorous bird, the chaffinch Fringilla coelebs. Journal of Avian Biology 37, 413418.

E.E. Jorgensen (2001) Emission of volatile compounds by seeds under different environmental conditions. American Midland Naturalist 145, 419422.

J.D. Ligon (1978) Reproductive interdependence of Piñon jays and Piñon pines. Ecological Monographs 48, 111126.

J.R. McAuliffe (1990) Paloverdes, pocket mice, and bruchid beetles: interrelationships of seeds, dispersers, and seed predators. The Southwestern Naturalist 35, 329337.

A. Meisert (2002) Physical dormancy in Geraniaceae seeds. Seed Science Research 12, 121128.

O. Nystrand and A. Granström (1997) Post-dispersal predation on Pinus sylvestris seeds by Fringilla spp.: ground substrate affects selection for seed color. Oecologia 110, 353359.

T.R. Paulsen , L. Colville , I. Kranner , M.I. Daws , G. Högstedt , V. Vandvik and K. Thompson (2013) Physical dormancy in seeds: a game of hide and seek? New Phytologist 198, 496503.

T.R. Paulsen , G. Högstedt , K. Thompson , V. Vandvik and S. Eliassen (2014) Conditions favouring hard seededness as a dispersal and predator escape strategy. Journal of Ecology 102, 14751484.

S.S. Porter (2013) Adaptive divergence in seed color camouflage in contrasting soil environments. New Phytologist 197, 13111320.

M.V. Price and J.W. Joyner (1997) What resources are available to desert granivores: seed rain or soil seed bank? Ecology 78, 764773.

Z. Pucek , W. Jedrzejewski , B. Jedrzejewska and M. Pucek (1993) Rodent population dynamics in a primeval deciduous forest (Białowieża National Park) in relation to weather, seed crop, and predation. Acta Theriologica 38, 199232.

O.J. Reichman (1979) Desert granivore foraging and its impact on seed densities and distributions. Ecology 60, 10861092.

A. Saracino , C.M. D'Alessandro and M. Borghetti (2004) Seed colour and post-fire bird predation in a Mediterranean pine forest. Acta Oecologica 26, 191196.

D.C. Thompson and P.S. Thompson (1980) Food habits and caching behavior of urban grey squirrels. Canadian Journal of Zoology 58, 701710.

D.F. Tomback (1982) Dispersal of whitebark pine seeds by Clark's nutcracker: a mutualism hypothesis. Journal of Animal Ecology 51, 451467.

S.B. Vander Wall (1988) Foraging of Clark's nutcrackers on rapidly changing pine seed resources. The Condor 90, 621631.

S.B. Vander Wall (1991) Mechanisms of cache recovery by yellow pine chipmunks. Animal Behaviour 41, 851863.

S.B. Vander Wall (1993 b) Seed water content and the vulnerability of buried seeds to foraging rodents. American Midland Naturalist 129, 272281.

S.B. Vander Wall (1995) Influence of substrate water on the ability of rodents to find buried seeds. Journal of Mammalogy 76, 851856.

S.B. Vander Wall (1998) Foraging success of granivorous rodents: effects of variation in seed and soil water on olfaction. Ecology 79, 233241.

S.B. Vander Wall (2000) The influence of environmental conditions on cache recovery and cache pilferage by yellow pine chipmunks (Tamias amoenus) and deer mice (Peromyscus maniculatus). Behavioral Ecology 11, 544549.

S.B. Vander Wall (2002) Masting in animal-dispersed pines facilitates seed dispersal. Ecology 83, 35083516.

S.B. Vander Wall (2003) How rodents smell buried seeds: a model based on the behavior of pesticides in soil. Journal of Mammalogy 84, 10891099.

S.B. Vander Wall (2010) How plants manipulate the scatter-hoarding behaviour of seed-dispersing animals. Philosophical Transactions of the Royal Society B–Biological Sciences 365, 989997.

S.B. Vander Wall and R.P. Balda (1977) Coadaptations of the Clark's nutcracker and the Pinon pine for efficient seed harvest and dispersal. Ecological Monographs 47, 89111.

S.B. Vander Wall and S.H. Jenkins (2003) Reciprocal pilferage and the evolution of food-hoarding behavior. Behavioral Ecology 14, 656667.

S.B. Vander Wall , K.M. Kuhn and M.J. Beck (2005) Seed removal, seed predation, and secondary dispersal. Ecology 86, 801806.

C.G. Willis , C.C. Baskin , J.M. Baskin , J.R. Auld , D.L. Venable , J. Cavender-Bares , K. Donohue , R.R. de Casas and N.G.W.G. The (2014) The evolution of seed dormancy: environmental cues, evolutionary hubs, and diversification of the seed plants. New Phytologist 203, 300309.

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Seed Science Research
  • ISSN: 0960-2585
  • EISSN: 1475-2735
  • URL: /core/journals/seed-science-research
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