Specialization of plant-pollinator interactions increases with temperature at Mt. Kilimanjaro

Ecology and Evolution
Alice ClassenIngolf Steffan-Dewenter

Abstract

Species differ in their degree of specialization when interacting with other species, with significant consequences for the function and robustness of ecosystems. In order to better estimate such consequences, we need to improve our understanding of the spatial patterns and drivers of specialization in interaction networks. Here, we used the extensive environmental gradient of Mt. Kilimanjaro (Tanzania, East Africa) to study patterns and drivers of specialization, and robustness of plant-pollinator interactions against simulated species extinction with standardized sampling methods. We studied specialization, network robustness and other network indices of 67 quantitative plant-pollinator networks consisting of 268 observational hours and 4,380 plant-pollinator interactions along a 3.4 km elevational gradient. Using path analysis, we tested whether resource availability, pollinator richness, visitation rates, temperature, and/or area explain average specialization in pollinator communities. We further linked pollinator specialization to different pollinator taxa, and species traits, that is, proboscis length, body size, and species elevational ranges. We found that specialization decreased with increasing elevation at different...Continue Reading

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Citations

Mar 18, 2021·Proceedings. Biological Sciences·Deepa SenapathiAlexandra-Maria Klein
Apr 18, 2021·The New Phytologist·Agnes S DellingerJürg Schönenberger
Sep 10, 2021·Biodiversity Data Journal·Julius V LaswayHenry K Njovu

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Software Mentioned

R package “ bipartite
R package “
r2glmm ”
R package “ bipartite ”
AIC
ACT

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