1/11/2024 0 Comments Acorn tree service michigan![]() ex Hildebr.)-black oak ( Quercus kelloggii Newberry) forests in the San Bernardino Mountains of southern California, USA. In mid-September 2007, a 5600 ha wildfire burned Jeffrey pine ( Pinus jeffreyi Balf.)-white fir ( Abies concolor Lindl. ![]() 2006) or from undisturbed forests to those undergoing succession (Crow and Adiksson 1994). 2008), although several have documented dispersal from undisturbed to disturbed habitats (e.g., cut over stands: Takahashi et al. So far, nearly all acorn dispersal studies have been carried out in unburned forests (Gomez 2004, Moore et al. 2007).ĭespite the prevalence of fire in oak communities throughout the world, no experimental studies have investigated whether rodents and corvids scatter-hoard acorns after fire. Rodents in the genera Sciurus, Eutamias, Tamias, Peromyscus, and Apodemus also scatter-hoard substantial numbers of acorns, but generally carry them shorter distances (<25 m) than birds (Iida 2006, Jones et al. Members of the Corvidae ( Garrulus, Aphelocoma, Cyanocitta) move hundreds, or even thousands, of acorns both short (meters and tens of meters) and long (hundreds of meters to kilometers) distances from fruiting trees (Gómez 2004, Pons and Pausas 2007, Purves et al. Rodents and birds are indispensable to seedling recruitment of oaks ( Quercus L.) worldwide, both as dispersers and planters (Steele and Smallwood 2002, Pons and Pausas 2007). ![]() Our results suggest that scatter-hoarding of acorns may be a common phenomenon after fire, and likely plays an important role in seedling recruitment. By spring of 2008, 55% these acorns were missing, and many of those that we relocated had been re-cached in new locations. In the high-severity burn, we recovered 59 (9.8%) of the 600 acorns placed under top-killed oaks these had been scatter-hoarded an average of 5.27 m from the source plots and buried an average of 22 mm. By spring of 2008, 90% of the cached acorns were missing. ![]() Dispersers moved acorns an average distance of 5 m and buried them to an average depth of 30 mm. In the fall of 2007, we placed 600 magnet-bearing acorns under trees in the unburned area. The objective of this study was to compare scatter-hoarding in a high-severity burn to that in an unburned forest. We investigated California black oak ( Quercus kelloggii Newberry) acorn dispersal by rodents and birds in the months after a stand-replacing fire in a mixed conifer forest in the San Bernardino Mountains of southern California, USA. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |