High rates of army ant raids in the Neotropics and implications for ant colony and community structure
High rates of army ant raids in the Neotropics and implications for ant colony and community structure
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新热带地区行军蚁袭击率高及其对蚁群和群落结构的影响
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
S. O’Donnell
中科院分区：
文献类型：
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作者：
M. Kaspari;S. O’Donnell
行军蚁形成游牧的昆虫群落，它们的主要食物是其他社会性昆虫。在这里，我们比较了28个新世界亚热带和热带地区的行军蚁袭击率与其潜在猎物的平均密度。我们估计，行军蚁袭击发生在1.22平方米，每天在热带森林的速度。行军蚁袭击率增加初级生产力，并与潜在的猎物（窝筑巢蚁群）的密度，跨网站。我们对行军蚁行会的突袭率的估计要比以前发表的仅仅基于地表突袭的埃西顿的估计高得多。生活史理论预测，昆虫社会的高捕食率将选择较小的平均群体大小和不确定的群体增长，这些特征已被记录为热带蚂蚁窝筑巢蚂蚁。我们的研究结果表明，行军蚁捕食可以影响这两种模式。
Army ants form nomadic insect colonies whose chief food is other social insects. Here we compare the rate of army ant raids with the average density of their potential prey from 28 New World subtropical and tropical localities. We estimate that army ant raids occur at the rate of 1.22 m 2 per day in tropical forests. Army ant raid rates increased with primary productivity, and with the density of potential prey (litter-nesting ant colonies), across sites. Our estimates of raid rates for army ant guilds are much higher than previously published estimates based solely on surface-raiding Eciton. Life-history theory predicts that high rates of predation on insect societies will select for both smaller average colony sizes and indeterminate colony growth, and these traits have been documented for tropical ant litter-nesting ants. Our results suggest that army ant predation can affect both patterns.