Beyond buzz-pollination – departures from an adaptive plateau lead to new pollination syndromes

Agnes Dellinger, Marion Chartier, Diana Fernández-Fernández, Darin S. Penneys, Marcela Alvear, Frank Almeda, Fabián A. Michelangeli, Yannick Staedler, Scott Armbruster, Jurg Schonenberger

Research output: Contribution to journalArticlepeer-review

130 Downloads (Pure)

Abstract

• Pollination syndromes describe recurring adaptation to selection imposed by distinct pollinators. We test for syndromes in Merianieae (Melastomataceae), which contain bee- (buzz), hummingbird-, flowerpiercer-, passerine-, bat-, and rodent-pollinated species. Further, we explore trait changes correlated with the repeated shifts away from buzz-pollination that represents an ‘adaptive plateau’ in Melastomataceae.

• We use Random Forest analyses to identify key traits associated with the different pollinators of 19 Merianieae species and estimate pollination syndromes of 42 more species. We employ morphospace analyses to evaluate the morphological diversity (disparity) among syndromes.

• We identify three pollination syndromes (‘buzz-bee’, ‘mixed-vertebrate’, ‘passerine’), characterized by different pollen expulsion mechanisms and reward types but not by traditional syndrome characters. Further, we find that ‘efficiency’ rather than ‘attraction’ traits are important for syndrome circumscription. Contrary to syndrome theory, our study supports pooling different pollinators (hummingbirds, bats, rodents, flowerpiercers) into the ‘mixed-vertebrate’ syndrome and we find that disparity is highest in the ‘buzz-bee’ syndrome.

• We conclude that the highly adaptive buzz-pollination system may have prevented shifts towards classical pollination syndromes, but provided the starting point for the evolution of a novel set of distinct syndromes, all having retained multifunctional stamens that provide pollen expulsion, reward, and attraction.
Original languageEnglish
Pages (from-to)1136-1149
Number of pages14
JournalNew Phytologist
Volume221
Issue number2
Early online date12 Oct 2018
DOIs
Publication statusPublished - 1 Jan 2019

Keywords

  • buzz-pollination
  • vertebrate pollination
  • pollinator shifts
  • morphospace
  • floral evolution

Fingerprint

Dive into the research topics of 'Beyond buzz-pollination – departures from an adaptive plateau lead to new pollination syndromes'. Together they form a unique fingerprint.

Cite this