How accurate are estimates of flower visitation rates by pollinators? Lessons from a spatially explicit agent-based model

Santos, Mário; Cajaíba, Reinaldo Lucas; Gonzalez, Darinka; Leote, Pedro; Ferreira, Daniel; Bastos, Rita; Silva, Wully Barreto da; Cabral, João Alexandre

doi:10.1016/j.ecoinf.2020.101077

Cited by 3 publications

(1 citation statement)

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“…To test the effect of landscape and pollinator specialisation on pollinator visitation rates and pollination probability, we generated random landscapes with varying levels of plant intermixing using a landscape diversity model (Santos et al, 2020; Wirth et al, 2016). The level of plant intermixing is controlled by a variable called ‘seed percentage’ (Figure 1).…”

Section: Methodsmentioning

confidence: 99%

Landscape composition and pollinator traits interact to influence pollination success in an individual‐based model

et al. 2023

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1. The arrangement of plant species within a landscape influences pollination via changes in pollinator movement trajectories and plant-pollinator encounter rates.Yet the combined effects of landscape composition and pollinator traits (especially specialisation) on pollination success remain hard to quantify empirically.2. We used an individual-based model to explore how landscape and pollinator specialisation (degree) interact to influence pollination. We modelled variation in the landscape by generating gradients of plant species intermixing-from no mixing to complete intermixing. Furthermore, we varied the level of pollinator specialisation by simulating plant-pollinator (six to eight species) networks of different connectance. We then compared the impacts of these drivers on three proxies for pollination: visitation rate, number of consecutive visits to the focal plant species and expected number of plants pollinated.3. We found that the spatial arrangements of plants and pollinator degree interact to determine pollination success, and that the influence of these drivers on pollination depends on how pollination is estimated. For most pollinators, visitation rate increases in more plant mixed landscapes. Compared to the two more functional measures of pollination, visitation rate overestimates pollination service. This is particularly severe in landscapes with high plant intermixing and for generalist pollinators. Interestingly, visitation rate is less influenced by pollinator traits (pollinator degree and body size) than are the two functional metrics, likely because 'visitation rate' ignores the order in which pollinators visit plants. However, the visitation sequence order is crucial for the expected number of plants pollinated, since only prior visits to conspecific individuals can contribute to pollination. We | 2057Functional Ecology KORTSCH et al.

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Section: Methodsmentioning

confidence: 99%