Science. 1977 Aug 12;197(4304):678-80. doi: 10.1126/science.197.4304.678.
Small Bombus ternarius workers for age most frequently on the distal parts of goldenrod flower clusters when large B. terricola workers are present. This shift results from B. ternarius avoiding B. terricola. In this way B. ternarius can exploit, without conflict, resources whose availability changes constantly because of fluctuating numbers of larger consumers.
当大型 B. terricola 工蜂存在时，小型 Bombus ternarius 工蜂通常会在金雀花簇的远端采集花粉，这是因为它们为了躲避 B. terricola 而做出的改变。这样，B. ternarius 就可以在不与更大的消费者发生冲突的情况下利用资源，而这些资源的可用性由于较大消费者数量的波动而不断变化。
