Demography of alpine red squirrel populations in relation to fluctuations in seed crop size

Ecography

Volumn 31, Issue 1, 2008, Pages 104-114

  A Wauters, Lucas ^a,b   Githiru, Mwangi ^b,c   Bertolino, Sandro ^d   Molinari, Ambrogio ^a   Tosi, Guido ^a   Lens, Luc ^e  

^a UNIVERSITY OF INSUBRIA   (Italy)

^b UNIVERSITY OF ANTWERP   (Belgium)

^c INSTITUTE OF PRIMATE RESEARCH   (Kenya)

^d UNIVERSITY OF TURIN   (Italy)

^e GHENT UNIVERSITY   (Belgium)

Author keywords

[No Author keywords available]

Indexed keywords

CONIFEROUS FOREST; CROP; DISPERSAL; FOOD AVAILABILITY; POPULATION DENSITY; POPULATION DISTRIBUTION; POPULATION DYNAMICS; POPULATION SIZE; REPRODUCTION; RODENT; SEED PRODUCTION; SPACE USE; SURVIVAL;

CONIFEROPHYTA; PICEA ABIES; PINUS SYLVESTRIS; SCIURIDAE; SCIURUS; TAMIASCIURUS; VERTEBRATA;

EID: 39549094090     PISSN: 09067590     EISSN: 16000587     Source Type: Journal    
DOI: 10.1111/j.2007.0906-7590.05251.x     Document Type: Article

References (75)

1. Albon, S. D. et al. 2000. Temporal changes in key factors and key age groups influencing the population dynamics of female red deer J. Anim. Ecol. 69 : 1099 1110.
2. Andrén, H. Lemnell, P. A. 1992. Population fluctuations and habitat selection in the Eurasian red squirrel Sciurus vulgaris Ecography 15 : 303 307.
3. Barkalow, F. S. Jr et al. 1970. The vital statistics of unexploited gray squirrel population J. Wildl. Manage. 34 : 489 500.
4. Benkman, C. W. et al. 2001. The influence of a competitor on the geographic mosaic of coevolution between crossbills and lodgepole pine Evolution 55 : 282 294.
5. Benkman, C. W. et al. 2003. Reciprocal selection causes a coevolutionary arms race between crossbills and lodgepole pine Am. Nat. 162 : 182 194.
6. Bertolino, S. Genovesi, P. 2003. Spread and attempted eradication of the grey squirrel (Sciurus carolinensis) in Italy, and consequences for the red squirrel (Sciurus vulgaris) in Eurasia Biol. Conserv. 109 : 351 358.
7. Bertolino, S. et al. 2003. Prevalence of coccidia parasites (Protozoa) in red squirrels (Sciurus vulgaris): effects of host phenotype and environmental factors Oecologia 137 : 286 295.
8. Boutin, S. et al. 2006. Anticipatory reproduction and population growth in seed predators Science 314 : 1928 1930.
9. Carpenter, F. L. MacMillen, R. E. 1976. Threshold model of feeding territoriality and test with a Hawaiian honeycreeper Science 194 : 639 642.
10. Clutton-Brock, T. H. et al. 1985. Population regulation in male and female red deer J. Anim. Ecol. 54 : 831 846.
11. Clutton-Brock, T. H. et al. 2002. Sex differences in emigration and mortality affect optimal management of deer populations Nature 415 : 633 637.
12. Curran, L. M. Leighton, M. 2000. Vertebrate responses to spatiotemporal variation in seed production of mast-fruiting Dipterocarpaceae Ecol. Monogr. 70 : 101 128.
13. Dias, P. C. 1996. Sources and sinks in population biology Trends Ecol. Evol. 11 : 326 330.
14. Dias, P. C. Blondel, J. 1996. Local specialization and maladaptation in the Mediterranean blue tit (Parus caeruleus) Oecologia 107 : 79 86.
15. Dobson, F. S. 1995. Regulation of population size: evidence from Columbian ground squirrels Oecologia 102 : 44 51.
16. Dobson, S. F. Oli, M. K. 2001. The demographic basis of population regulation in Columbian ground squirrels Am. Nat. 158 : 236 247.
17. Endler, J. A. 1977. Geographic variation, speciation, and clines. Princeton Univ. Press.
18. Fretwell, S. D. Lucas, H. L. Jr. 1969. On territorial behaviour and other factors influencing habitat distribution in birds. I. Theoretical development Acta Biotheor. 19 : 16 36.
19. Gurnell, J. 1983. Squirrel numbers and the abundance of tree seeds Mammal Rev. 13 : 133 148.
20. Gurnell, J. 1996. The effects of food availability and winter weather on the dynamics of a grey squirrel population in southern England J. Appl. Ecol. 33 : 325 338.
21. Gurnell, J. et al. 2004. Alien species and interspecific competition: effects of introduced eastern grey squirrels on red squirrel population dynamics J. Anim. Ecol. 73 : 26 35.
22. Haughland, D. L. Larsen, K. W. 2004a. Ecology of North American red squirrels across contrasting habitats: relating natal dispersal to habitat J. Mammal. 85 : 225 236.
23. Haughland, D. L. Larsen, K. W. 2004b. Exploration correlates with settlement: red squirrel dispersal in contrasting habitats J. Anim. Ecol. 73 : 1024 1034.
24. Hixon, M. A. et al. 2002. Population regulation: historical context and contemporary challenges of open vs. closed systems Ecology 83 : 1490 1508.
25. Humphries, M. M. Boutin, S. 2000. The determinants of optimal litter size in free-ranging red squirrels Ecology 81 : 2867 2877.
26. Hurly, T. A. 1987. Male-biased adult sex ratios in a red squirrel population Can. J. Zool. 65 : 1284 1286.
27. Ims, R. A. 1988. Spatial clumping of sexual receptive females induces space sharing among male voles Nature 336 : 541 543.
28. Julliard, R. et al. 1999. Survival-variation within and between functional categories of the African multimammate rat J. Anim. Ecol. 68 : 550 561.
29. Kenward, R. E. Holm, J. L. 1993. On the replacement of the red squirrel in Britain: a phytotoxic explanation Proc. R. Soc. B 251 : 187 197.
30. Kenward, R. E. et al. 1998. Comparative demography of red squirrels (Sciurus vulgaris) and grey squirrels (Sciurus carolinensis) in deciduous and conifer woodland J. Zool. 244 : 7 21.
31. Konnert, M. Bergmann, F. 1995. The geographical distribution of genetic variation of silver fir (Abies alba, Pinaceae) in relation to its migration history Plant Syst. Evol. 196 : 19 30.
32. Koprowski, J. 1991. Response of fox squirrels and gray squirrels to a late spring-early summer food shortage J. Mammal. 72 : 367 372.
33. Lambin, X. 1994. Natal philoptary, competition for resources, and inbreeding avoidance in Townsend's voles (Microtus townsendii) Ecology 75 : 224 235.
34. Lebreton, J.-D. et al. 1992. Modeling survival and testing biological hypotheses using marked animals: a unified approach with case studies Ecol. Monogr. 62 : 67 118.
35. Lurz, P. P. W. et al. 1995. The ecology of squirrels in spruce dominated plantations: implications for forest management For. Ecol. Manage. 79 : 79 90.
36. Lurz, P. P. W. et al. 1997. Effects of temporal and spatial variation in habitat quality on red squirrel dispersal behaviour Anim. Behav. 54 : 427 435.
37. Lurz, P. P. W. et al. 2000. Effects of temporal and spatial variations in food supply on the space and habitat use of red squirrels, Sciurus vulgaris L J. Zool. 251 : 167 178.
38. Lurz, P. P. W. et al. 2001. Predicting grey squirrel expansion in north Italy: a spatially explicit modelling approach Landscape Ecol. 16 : 407 420.
39. Maher, C. R. Lott, D. F. 2000. A review of ecological determinants of territoriality within vertebrate species Am. Midl. Nat. 143 : 1 29.
40. McLoughlin, P. D. et al. 2000. Intraspecific variation in home range overlap with habitat quality: a comparison among brown bear populations Evol. Ecol. 14 : 39 60.
41. Mezquida, E. T. Benkman, C. W. 2005. The geographic selection mosaic for squirrels, crossbills and Aleppo pine J. Evol. Biol. 18 : 348 357.
42. Molinari, A. et al. 2006. Cone selection by Eurasian red squirrels in mixed conifer forests in the Italian Alps Acta Oecol. 30 : 1 10.
43. Münch, S. 1998. Populationsökologie, Aktivität, Raum- und Habitatnutzung beim Europäischen Eichhörnchen (Sciurus vulgaris L.) im Bergmischwald des Nationalparks Bayerischer Wald. - Ph.D. thesis, Friedrich-Schiller-Univ., Jena, Germany.
44. Nixon, C. M. et al. 1975. Effects of hunting and mast crops on a squirrel population J. Wildl. Manage. 39 : 1 25.
45. Ostfeld, R. S. 1985. Limiting resources and territoriality in microtine rodents Am. Nat. 126 : 1 15.
46. Ostfeld, R. S. 1990. The ecology of territoriality in small mammals Trends Ecol. Evol. 5 : 411 415.
47. Ostfeld, R. S. Keesing, F. 2000. Pulsed resources and community dynamics of consumers in terrestrial ecosystems Trends Ecol. Evol. 15 : 232 237.
48. Parker, G. A. Sutherland, W. J. 1986. Ideal free distributions when individuals differ in competitive ability: phenotype-limited ideal free models Anim. Behav. 34 : 1222 1242.
49. Pulliainen, E. 1982. Some characteristics of an exceptionally dense population of the red squirrel, Sciurus vulgaris L., on the southern coast of Finland Aquilo Ser. Zool. 21 : 9 12.
50. Pulliam, H. R. 1988. Sources, sinks, and population regulation Am. Nat. 132 : 652 661.
51. SAS 1999. SAS STAT users guide, version v.8.0. - SAS Inst., Cary, NC, USA.
52. Satake, A. Bjornstad, O. N. 2004. Spatial dynamics of specialist seed predators on synchronized and intermittent seed production of host plants Am. Nat. 163 : 591 605.
53. Smith, C. C. 1968. The adaptive nature of social organization in the genus of tree squirrels Tamiasciurus Ecol. Monogr. 38 : 31 63.
54. Smith, C. C. 1970. The coevolution of pine squirrels (Tamiasciurus) and conifers Ecol. Monogr. 40 : 349 371.
55. Steele, M. et al. 2005. Selection, predation and dispersal of seeds by tree squirrels in temperate and boreal forests: are tree squirrels keystone granivores? - In: Forget, P.-M. et al. (eds), Seed fate: predation, dispersal, and seedling establishment. CAB International, pp. 205-221.
56. Tattoni, C. et al. 2006. Modelling the expansion of a grey squirrel population: implications for squirrel control Biol. Invasions 8 : 1605 1619.
57. Trizio, I. et al. 2005. Geographical distance and physical barriers shape the genetic structure of Eurasian red squirrels (Sciurus vulgaris) in the Italian Alps Mol. Ecol. 14 : 469 481.
58. Turchin, P. 1999. Population regulation: a synthetic view Oikos. 84 : 153 159.
59. Van Horne, B. 1983. Density as a misleading indicator of habitat quality J. Wildl. Manage. 47 : 893 901.
60. Wauters, L. A. Dhondt, A. A. 1987. Activity budget and foraging behaviour of the red squirrel (Sciurus vulgaris, Linnaeus, 1758) in a coniferous habitat Z. Säugetierk. 52 : 341 352.
61. Wauters, L. A. Dhondt, A. A. 1992. Spacing behaviour of red squirrels, Sciurus vulgaris: variation between habitats and the sexes Anim. Behav. 43 : 297 311.
62. Wauters, L. A. Dhondt, A. A. 1993. Immigration pattern and success in red squirrels Behav. Ecol. Sociobiol. 33 : 159 167.
63. Wauters, L. A. Dhondt, A. A. 1995. Lifetime reproductive success and its correlates in female eurasian red squirrels Oikos 72 : 402 410.
64. Wauters, L. A. Lens, L. 1995. Effects of availability and density on red squirrel (Sciurus vulgaris) reproduction Ecology 76 : 2460 2469.
65. Wauters, L. A. et al. 1992. Activity budget and foraging behaviour of red squirrels (Sciurus vulgaris) in coniferous and deciduous habitats J. Zool. 227 : 71 86.
66. Wauters, L. A. et al. 1994a. The effects of habitat fragmentation on demography and on the loss of genetic variation in the red squirrel Proc. R. Soc. B 255 : 107 111.
67. Wauters, L. et al. 1994b. Space use and dispersal of red squirrels in fragmented habitats Oikos 69 : 140 146.
68. Wauters, L. A. et al. 1995. Variation in territory fidelity and territory shifts among red squirrel, Sciurus vulgaris, females Anim. Behav. 49 : 187 193.
69. Wauters, L. A. et al. 2001a. Does interspecific competition with introduced grey squirrels affect foraging and food choice of Eurasian red squirrels? Anim. Behav. 61 : 1079 1091.
70. Wauters, L. A. et al. 2001b. Effects of spatial variation in food availability on spacing behaviour and demography of Eurasian red squirrels Ecography 24 : 525 538.
71. Wauters, L. A. et al. 2004. Within-sex density dependence and population dynamics of red squirrels J. Anim. Ecol. 73 : 11 25.
72. Wauters, L. A. et al. 2005. Food shortage disrupts social organization: the case of red squirrels in conifer forests Evol. Ecol. 19 : 375 404.
73. Wauters, L. A. et al. 2007. Effects of spatio-temporal variation in food supply on red squirrel Sciurus vulgaris body size and body mass and its consequences for some fitness components Ecography 30 : 51 65.
74. Wheatley, M. et al. 2002. Does density reflect habitat quality for North American red squirrels during a spruce-cone failure? J. Mammal. 83 : 716 727.
75. White, G. C. Burnham, K. P. 1999. Program MARK: survival estimation from populations of marked animals Bird Study 46 : S120 S139.