Variation and macroevolution in leaf functional traits in the Hawaiian silversword alliance (Asteraceae)

Blonder, Benjamin; Baldwin, Bruce G.; Enquist, Brian J.; Robichaux, Robert H; Lau, Jennifer C.M.

doi:10.1111/1365-2745.12497

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Variation and macroevolution in leaf functional traits in the Hawaiian silversword alliance (Asteraceae)

Author(s): Benjamin Blonder , Bruce G. Baldwin , Brian J. Enquist , Robert H. Robichaux

Editor(s): Jennifer Lau

Publication date Created: January 2016

Publication date (Print): January 2016

Journal: Journal of Ecology

Publisher: Wiley-Blackwell

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Climate change mitigation: A spatial analysis of global land suitability for clean development mechanism afforestation and reforestation

Robert Zomer, Antonio Trabucco, Deborah Bossio … (2008)

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Speciation and ecology revisited: phylogenetic niche conservatism and the origin of species.

John J Wiens (2004)

Evolutionary biologists have often suggested that ecology is important in speciation, in that natural selection may drive adaptive divergence between lineages that inhabit different environments. I suggest that it is the tendency of lineages to maintain their ancestral ecological niche (phylogenetic niche conservatism) and their failure to adapt to new environments which frequently isolates incipient species and begins the process of speciation. Niche conservatism may be an important and widespread component of allopatric speciation but is largely unstudied. The perspective outlined here suggests roles for key microevolutionary processes (i.e., natural selection, adaptation) that are strikingly different from those proposed in previous literature on ecology and speciation. Yet, this perspective is complementary to the traditional view because it focuses on a different temporal stage of the speciation process.

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Leaf hydraulics.

Lawren Sack, N. Holbrook (2006)

Leaves are extraordinarily variable in form, longevity, venation architecture, and capacity for photosynthetic gas exchange. Much of this diversity is linked with water transport capacity. The pathways through the leaf constitute a substantial (>or=30%) part of the resistance to water flow through plants, and thus influence rates of transpiration and photosynthesis. Leaf hydraulic conductance (K(leaf)) varies more than 65-fold across species, reflecting differences in the anatomy of the petiole and the venation architecture, as well as pathways beyond the xylem through living tissues to sites of evaporation. K(leaf) is highly dynamic over a range of time scales, showing circadian and developmental trajectories, and responds rapidly, often reversibly, to changes in temperature, irradiance, and water supply. This review addresses how leaf structure and physiology influence K(leaf), and the mechanisms by which K(leaf) contributes to dynamic functional responses at the level of both individual leaves and the whole plant.