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Pilfering of western juniper seed caches by scatter-hoarding rodents varies by microsite and canopy type

Integrative Zoology 2022年第2期17卷 192-205页

作者： Lindsay A.DIMITRI William S.LONGLAND Agricultural Research Service Great Basin Rangeland ResearchUSDAUSA

Scatter-hoarding rodents store seeds throughout their home ranges in superficially buried caches which,unlike seeds larder-hoarded in burrows,are difficult to *** seeds are often pilfered by other scatter-hoarders and either re-cached,eaten or *** seed movements can influence seedling recruitment,because only seeds remaining in caches are likely to *** the importance of scatter-hoarding rodents in the dispersal of western juniper seeds has recently been revealed,the level of pilfering that occurs after initial burial is *** traits,soil moisture,and substrate can influence pilfering processes,but less is known about how pilfering varies among caches placed in open versus canopy microsites,or how cache discovery and removal varies among different canopy-types,tree versus *** compared the removal of artificial caches between open and canopy microsites and between tree and shrub canopies at two sites in northeastern California during late spring and *** also used trail cameras at one site to monitor artificial cache removal,identify potential pilferers,and illuminate microsite use by *** of artificial caches was faster in open microsites at both sites during both seasons,and more caches were removed from shrub than tree *** kangaroo rats were the species observed most on cameras,foraging most often in open microsites,which could explain the observed pilfering *** is the first study to document pilfering of western juniper seeds,providing further evidence of the importance of scatter-hoarding rodent foraging behavior in understanding seedling recruitment processes in juniper woodlands.

关键词： dipodomys californicus Juniperus Perognathus parvus Peromyscus truei seed caching seed dispersal

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