The architecture of shrubs after defoliation and the subsequent feeding behavior of browsers

Autor:	Donald E. Spalinger, M. K. Owens, T. F. Ginnett, Susan M. Cooper
Rok vydání:	2003
Předmět:	Herbivore biology ved/biology Prosopis glandulosa ved/biology.organism_classification_rank.species Acacia Odocoileus biology.organism_classification Shrub Acacia schaffneri Feeding behavior Agronomy Botany Ecology Evolution Behavior and Systematics Woody plant
Zdroj:	Oikos. 100:387-393
ISSN:	1600-0706 0030-1299
Popis:	We examined regrowth architecture of 4 species of savanna shrubs following 4 levels of defoliation. Defoliation had little effect on the regrowth architecture of honey mesquite (Prosopis glandulosa), which is rarely browsed by mammalian herbivores. The 3 acacia species (Acacia berlandieri, A. greggii, A. schaffneri) responded to defoliation by increasing leaf and spine density on the regrowth branches, but spine length and branching architecture remained unchanged. Only A. greggii, which is a preferred food plant of many browsers, exhibited an increase in the number and length of current annual growth branches in response to defoliation. The changes in plant architecture due to defoliation had little effect on the subsequent feeding behavior of captive white-tailed deer (Odocoileus virginianus). Food intake rate of the deer was most strongly related to internode distance, a parameter not significantly altered by defoliation. This suggests that the architectural responses of these shrubs to defoliation may not provide increased defense against browsing by co-evolved mammals.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2d5f79e42d7c8dbb3a3b7cc855f939fc https://doi.org/10.1034/j.1600-0706.2003.11792.x Zobrazit plný text záznamu Plný text