30th Aug (Thu) 13:30 - 15:00; 15:30 - 17:00

Phylogenetic niche conservatism, biome switching, and adaptation in legume evolution

The concept of phylogenetic niche conservatism – that organisms tend to maintain their ancestral ecological predilections - has become influential in plant evolution and biogeography. Conversely, some studies show that frequent evolutionary switches, even between major biomes such as tropical forests and savannas, have made a considerable contribution to modern day patterns of species distribution. Because legumes dominate many major biomes they make ideal case studies for investigating phylogenetic niche conservatism and biome switching, and empirical studies based upon legumes continue to play an important role. This symposium will showcase new empirical studies but will also consider the broader conceptual framework for studies of biome-switching in plant evolution. Ultimately, the ability of lineages to switch biomes, or their degree of niche conservatism, is contingent on the ease of evolution of specific adaptations to overcome major adaptive barriers, including suites of critical legume functional traits such as nodulation, frost, drought and fire tolerance, growth forms and leaf characteristics, and the symposium will also consider the evolution and biogeography of some of these key traits.

ORGANIZERS: Toby Pennington (University of Exeter, U.K.); Colin Hughes (University of Zurich, Switzerland)

1. Environmental barriers between biomes: how hard are they to overcome and how do trees contribute to create them?
Tristan Charles-Dominique* (XTBG, Chinese Academy of Sciences)

2. Niche evolution in South American trees and its consequences
Danilo Neves*1, R. Toby Pennington2, Kyle Dexter3 (1Federal University of Minas Gerais, Department of Botany, 31270-901, Belo Horizonte, Brazil;2University of Exeter, Department of Geography, EX4 4 RJ, Exeter, UK;3University of Edinburgh, Department of GeoSciences, EH9 3FF, Edinburgh, UK )

3. The evolution of South American savanna plants: biome shifts and adaptations to fire
Marcelo Simon* (Embrapa Recursos Genéticos e Biotecnologia)

4. Patterns of biome evolution, continental shifts and species diversification in Cercidoideae, Detarioideae and Dialioideae
Anne Bruneau*1, Manuel de la Estrella2, Edeline Gagnon3, Élyse-Ann Faubert1, Carole Sinou1 (1Institut de recherche en biologie végétale, Université de Montréal, Canada;2Departamento de Botánica, Ecología y Fisiología Vegetal, Universidad de Cordoba, Spain;3Royal Botanical Gardens, Edinburgh, Scotland, United Kingdom )

5. The interplay between climatic niche and life history evolution in Lupinus – behind the scenes of a spectacular adaptive radiation
Victoria Cabrera*1, Nicolai Nürk2, Guy Atchison1, Colin Hughes1 (1Institute of Systematic and Evolutionary Botany, University of Zürich, Zürich, Switzerland;2Institute of Plant Systematics, Bayreuth Centre of Ecology and Environmental Research (BayCEER), University of Bayreuth, Bayreuth, Germany )

6. Niche evolution in Australia Acacia
Daniel John Murphy*1, Matt Renner2, Charles Foster3, Gillian Brown4, Joseph Miller5 (1Royal Botanic Gardens Victoria;2The Royal Botanic Gardens and Domain Trust ;3The University of Sydney;4Queensland Herbarium;5National Science Foundation )

7. Caesalpinioid legume biome conservatism across the seasonally dry tropics
Jens J. Ringelberg*1, Niklaus E. Zimmermann2, Colin E. Hughes1 (1Department of Systematic and Evolutionary Botany, University of Zurich, Zurich, Switzerland;2Landscape Ecology, Institute of Terrestrial Ecosystems, ETH Zurich, Zurich, Switzerland;3Swiss Federal Research Institute WSL, Birmensdorf, Switzerland )

8. What do legumes need to evolve to live under erratic rainfall regimes?
Jonathan James Lloyd* (Imperial College London)