Recaching of Jeffrey pine (Pinus jeffreyi) seeds by yellow pine chipmunks (Tamias amoenus): potential effects on plant reproductive success

Animals that scatter-hoard seeds frequently dig up and recache them at new locations. The effect of the recaching of seeds on plant reproductive success was studied in the Sierra Nevada of western Nevada. The fate of 1000 individually marked Jeffrey pine (Pinus jeffreyi) seeds initially placed in 100 primary caches in a 10 x 10 array was monitored during autumn 1995 and spring 1996. Yellow pine chipmunks (Tamias amoenus) quickly removed nearly all of the seeds and recached many of them in 377 secondary caches containing 727 seeds. Later, rodents dug up most of these caches and transferred them to 213 tertiary caches (283 seeds), 75 quaternary caches (92 seeds), and 13 quintic (fifth order) caches (13 seeds). Overall, rodents ate 15.3% of the seeds they took from primary through quintic caches, and an additional 71.1% of the seeds disappeared, probably to underground runways and larders. During our spring survey of the study site, 133 seeds (13.6%) from 84 caches had germinated or were about to germinate. ...

[1]  M. Stapanian,et al.  A Model for Seed Scatterhoarding: Coevolution of Fox Squirrels and Black Walnuts , 1978 .

[2]  V. Pravosudov,et al.  Toward a general theory of energy management in wintering birds , 1994 .

[3]  Russell P. Balda,et al.  Cache recovery and spatial memory in Clark's nutcrackers (Nucifraga columbiana). , 1985 .

[4]  Jeanne C. Chambers,et al.  A Day in the Life of a Seed: Movements and Fates of Seeds and Their Implications for Natural and Managed Systems , 1994 .

[5]  L. Jacobs,et al.  Scatter hoarding by kangaroo rats (Dipodomys merriami) and pilferage from their caches. , 1992 .

[6]  K. Clarkson,et al.  Density dependence and magpie food hoarding , 1986 .

[7]  Stephen B. Vander Wall,et al.  An experimental analysis of cache recovery in Clark's nutcracker , 1982, Animal Behaviour.

[8]  C. Augspurger,et al.  Wind Dispersal of Artifical Fruits Varying in Mass, Area, and Morphology , 1987 .

[9]  S. B. Wall.  Removal of wind-dispersed pine seeds by ground-foraging vertebrates , 1994 .

[10]  Russell P. Balda,et al.  Coadaptations of the Clark's nutcracker and the pinon pine for efficient seed harvest and dispersal. , 1977 .

[11]  Ido Bossema,et al.  Jays and oaks: An eco-ethological study of a symbiosis , 1979 .

[12]  D. Greene,et al.  A MODEL OF WIND DISPERSAL OF WINGED OR PLUMED SEEDS , 1989 .

[13]  R. M. Lanner.  Adaptations of whitebark pine for seed dispersal by Clark's Nutcracker , 1982 .

[14]  S. B. Wall.  Dynamics of yellow pine chipmunk (Tamias amoenus) seed caches: Underground traffic in bitterbrush seeds , 1995 .

[15]  S. B. Wall.  Sequential Patterns of Scatter Hoarding by Yellow Pine Chipmunks (Tamias amoenus) , 1995 .

[16]  J. Krebs,et al.  Memory for the location of stored food in marsh tits , 1981, Animal Behaviour.

[17]  S. B. Wall.  The effects of seed value on the caching behavior of yellow pine chipmunks , 1995 .

[18]  D. Kramer,et al.  The placement, recovery, and loss of scatter hoards by eastern chipmunks,Tamias striatus , 1994 .

[19]  S. B. Wall.  THE ROLE OF ANIMALS IN DISPERSING A "WIND-DISPERSED" PINE' , 1992 .

[20]  V. Wall,et al.  Establishment of Jeffrey pine seedlings from animal caches , 1992 .

[21]  S. H. Jenkins,et al.  Spatial patterns of food storage by Merriam's kangaroo rats , 1992 .

[22]  G. E. Woolfenden,et al.  ACORN HARVESTING BY FLORIDA SCRUB JAYS , 1989 .

[23]  S. H. Jenkins,et al.  Food Hoarding by Merriam's Kangaroo Rats: A Test of Alternative Hypotheses , 1995 .

[24]  Df. Tomback,et al.  Foraging strategies of Clark's nutcracker , 1978 .

[25]  S. B. Wall.  Seed Fate Pathways of Antelope Bitterbrush: Dispersal by Seed-Caching Yellow Pine Chipmunks , 1994 .

[26]  N. Franks,et al.  Food Hoarding in Animals , 1990 .