Abundance drives generalisation in hummingbird-plant pollination networks

摘要: Abundant pollinators are often more generalised than rare pollinators. This could be because abundance drives generalisation: neutral effects suggest that abundant species will simply they have chance encounters with potential partners. On the other hand, generalisation drive abundance, as a competitive advantage over specialists, being able to exploit wider range of resources and gain balanced nutrient intake. Determining direction abundance- relationship is therefore chicken-and-egg dilemma. Here we determine between in hummingbird-plant pollination networks sampled from variety locations across Americas. We find evidence hummingbirds abundant, little generalised. Additionally, null model analysis suggests this pattern due processes: most patterns species-level were well explained by assumed interaction neutrality. These results processes play key role driving broad hummingbird