Johnson Anna L, Rebolleda-Gómez María, Ashman Tia-Lynn
Am Nat. 2019 Sep;194(3):405-413. doi: 10.1086/704607. Epub 2019 Jul 16.
Pollination is necessary for plant reproduction but often highly susceptible to disruption, for example, by habitat fragmentation and climate change. Here, we indirectly evaluated on a century timescale pollination interactions for species in one of the historically most disturbed habitats on earth-tropical dry forests of Hawai'i. We employed a novel method for acquiring a historical perspective on temporal change in pollination by characterizing pollen on stigmas of herbarium specimens from six remnant native species collected from 1909-2002. We determine whether temporal shifts occurred in (1) pollination quantity and quality or (2) the composition of species interacting via pollen transfer. While pollen quantity remained constant, these remnant species interact with different species in modern times via pollen transfer than they did nearly 100 years ago. Species that are resilient to long-term environmental change may also be the ones subject to changes in pollination interactions.
授粉是植物繁殖所必需的，但往往极易受到干扰，例如，受到栖息地破碎化和气候变化的影响。在这里，我们在一个世纪的时间尺度上，间接评估了地球上历史上受干扰最严重的栖息地之一——夏威夷热带干燥森林中物种的授粉相互作用。我们采用了一种新颖的方法来获取授粉随时间变化的历史视角，通过对1909年至2002年收集的六种残余本地物种的标本馆标本柱头上的花粉进行特征分析。我们确定在（1）授粉数量和质量或（2）通过花粉转移相互作用的物种组成方面是否发生了时间上的变化。虽然花粉数量保持不变，但这些残余物种在现代通过花粉转移与不同的物种相互作用，与近100年前相比有所不同。对长期环境变化具有恢复力的物种也可能是授粉相互作用发生变化的物种。
