Pollination and pre-dispersal seed predation: net effects on reproduction and inflorescence characteristics in Ipomopsis aggregata
Pollination and pre-dispersal seed predation: net effects on reproduction and inflorescence characteristics in Ipomopsis aggregata
复制标题
授粉和传播前种子捕食：对 Ipomopsis aggregata 繁殖和花序特征的净影响
作者：
F. Reed Hainsworth;L. L. Wolf;Theresa Mercier
通过对授粉前种子寄生虫（Hylemya sp.）的监测，研究了自交不亲和的单果Ipomopsis aggregata的净种子产量。在21株不同高度的植株上产卵和蜂鸟介导坐果。授粉和种子捕食增加花序高度。净种子产量（包括种子捕食者死亡率）也呈正相关的高度，这将是这样的情况下，如果授粉或种子捕食加倍。虽然研究结果表明，应在选择压力下，最大限度地提高花序高度，世代时间和资源的限制，可能会导致优势花序的中间高度。
SummaryWe examined net seed production for the self-incompatible, monocarp, Ipomopsis aggregata, by monitoring pre-pollination seed parasite (Hylemya sp.) oviposition and hummingbird mediated fruit set on 21 plants of variable height. Both pollination and seed predation increased with inflorescence height. Net seed production (incorporating seed predator mortality) also was positively related to height, and this would have been the case if pollination or seed predation were doubled. Although results suggest pomopsis aggregata should be under selective pressure to maximize inflorescence height, generation time and resource limits could result in advantages for inflorescences of intermediate height.