Evolution of plant materials for ecological restoration: insights from the applied and basic literature

Erin K. Espeland, Nancy C. Emery, Kristin L. Mercer, Scott A. Woolbright, Karin M. Kettenring, Paul Gepts, Julie R. Etterson

Research output: Contribution to journalReview articlepeer-review

27 Scopus citations

Abstract

Restoration is normally conducted with the goal of creating plant populations that establish, survive, successfully reproduce, contribute to ecosystem function and persist in the long term. Restoration often relies on revegetation that, on large scales, requires agronomic increase of native plant materials. During this propagation process, restoration populations are subject to genetic sampling as well as natural and artificial selection that could result in adaptation contrasting sharply with that of native populations. Here we draw on insights from the evolutionary and agricultural literature to illustrate how changes in the amount and type of genetic variation in ex situ repositories (source collections and production farms) could affect plant performance in restoration. The consequences of intentional and/or inadvertent evolutionary modification of restoration materials are discussed with respect to population viability and ecosystem function. Synthesis and applications. We conclude that sampling effects and intentional and unintentional selection during collection, propagation and restoration planting have the potential to diminish restored populations. We describe testing for evolutionary change in plant materials using neutral molecular markers and/or field observations. Six practices, multiple collections through time, multiple collections through space, large effective population size, provenance tracking, promoting gene flow and reducing selection comprise ‘evolutionarily enlightened management’ that decreases the potential for unintentional evolution and maladaptation.

Original languageEnglish (US)
Pages (from-to)102-115
Number of pages14
JournalJournal of Applied Ecology
Volume54
Issue number1
DOIs
StatePublished - Feb 1 2017

Keywords

  • ecological restoration
  • ecosystem function
  • ecosystem services
  • genetic drift
  • local adaptation
  • plant materials
  • plant propagation
  • revegetation
  • seed provenance
  • selection

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