Global patterns and a latitudinal gradient of flower disparity: perspectives from the angiosperm order Ericales.
Chartier M; Department of Botany and Biodiversity Research, University of Vienna, Rennweg 14, Vienna, 1030, Austria.
von Balthazar M; Department of Botany and Biodiversity Research, University of Vienna, Rennweg 14, Vienna, 1030, Austria.
Sontag S; Department of Botany and Biodiversity Research, University of Vienna, Rennweg 14, Vienna, 1030, Austria.
Löfstrand S; Department of Botany and Biodiversity Research, University of Vienna, Rennweg 14, Vienna, 1030, Austria.
Palme T; Department of Botany and Biodiversity Research, University of Vienna, Rennweg 14, Vienna, 1030, Austria.
Jabbour F; Institut de Systématique, Evolution, Biodiversité, Muséum National d'Histoire Naturelle, CNRS, Sorbonne Université, EPHE, Université des Antilles, 57 rue Cuvier, CP39, Paris, 75005, France.
Sauquet H; National Herbarium of New South Wales, Royal Botanic Gardens and Domain Trust, Mrs Macquaries Road, Sydney, NSW, 2000, Australia.; Evolution and Ecology Research Centre, School of Biological, Earth and Environmental Sciences, University of New South Wales, Kensington, NSW, 2033, Australia.
Schönenberger J; Department of Botany and Biodiversity Research, University of Vienna, Rennweg 14, Vienna, 1030, Austria.
The New phytologist [New Phytol] 2021 Apr; Vol. 230 (2), pp. 821-831. Date of Electronic Publication: 2021 Mar 04.
Typ publikacji :
Journal Article; Research Support, Non-U.S. Gov't
Imprint Name(s) :
Publication: Oxford : Wiley on behalf of New Phytologist Trust
Original Publication: London, New York [etc.] Academic Press.
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Contributed Indexing :
Keywords: Ericales*; angiosperms*; biodiversity*; disparity*; diversity*; flower morphology*; latitudinal gradient*; morphospace*
Entry Date(s) :
Date Created: 20210117 Latest Revision: 20210330
Update Code :
Morphological diversity (disparity) is an essential but often neglected aspect of biodiversity. Hence, it seems timely and promising to re-emphasize morphology in modern evolutionary studies. Disparity is a good proxy for the diversity of functions and interactions with the environment of a group of taxa. In addition, geographical and ecological patterns of disparity are crucial to understand organismal evolution and to guide biodiversity conservation efforts. Here, we analyse floral disparity across latitudinal intervals, growth forms, climate types, types of habitats, and regions for a large and representative sample of the angiosperm order Ericales. We find a latitudinal gradient of floral disparity and a decoupling of disparity from species richness. Other factors investigated are intercorrelated, and we find the highest disparity for tropical trees growing in African and South American forests. Explanations for the latitudinal gradient of floral disparity may involve the release of abiotic constraints and the increase of biotic interactions towards tropical latitudes, allowing tropical lineages to explore a broader area of the floral morphospace. Our study confirms the relevance of biodiversity parameters other than species richness and is consistent with the importance of species interactions in the tropics, in particular with respect to angiosperm flowers and their pollinators.
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