The role of aggression in range expansion and biological invasions  

作　　者：Sandra HUDINA Karlo HOCK Kresimir ZGANEC 

机构地区：[1]Faculty of Science, University of Zagreb, Rooseveltov trg 6, 10000 Zagreb, Croatia [2]School of Biological Sciences, University of Queensland, Brisbane, Australia [3]Department of Teachers' Education in Gospie, University of Zadar, Croatia

出　　处：《Current Zoology》2014年第3期401-409,共9页动物学报（英文版）

摘　　要：Traits that aid in the invasion process should exhibit a gradient across the expansion range in response to changing selection pressures. Aggression has been repeatedly associated with invasion success in many taxa, as it may help invaders to wrestle the resources from other species which enhances their success in a novel environment. However, aggression primarily al lows individuals to overcome conspecific rivals, providing advantages in competition over resources. Agonistic prowess could therefore increase fitness at both ends of the expansion gradient. Here we review the role of aggression in range expansion of in vasive species, and its potential role as a driver of range expansion. We analyze how these different mechanisms could affect trait variation in expanding and invasive populations. Specifically, we look at how aggression could help dilate the edges of a popula tion through niche competition, as well as lead to exclusion from the center （Le. areas of high population density） by the conspe cities. Both of these processes will result in a characteristic spatial distribution of phenotypes related to aggression that could provide insights into the ecological pressures and dynamics of expanding populations, potentially providing clues to their success as niche competitors and invasive species

关 键 词：AGGRESSION Trait variation Invasion success Invasive species 

分 类 号：Q16[生物学—普通生物学] O242.23[理学—计算数学]