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Lichen ecophysiology in a changing climate.

Daniel E Stanton1, Amaris Ormond2, Natalia M Koch1

  • 1Department of Ecology, Evolution and Behavior, University of Minnesota, 140 Gortner Laboratory, 1479 Gortner Avenue, Saint Paul, MN, 55108, USA.

American Journal of Botany
|February 16, 2023
PubMed
Summary
This summary is machine-generated.

Lichens are vital environmental indicators, but predicting their response to climate change requires understanding their ecophysiology. Future research should focus on varied lichen types and their internal symbiont dynamics to improve climate change models.

Keywords:
VPDacclimationalgal physiologycarbon balanceclimate changecryptogamfunctional traitlichen physiologypoikilohydrysymbiosiswater relations

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Area of Science:

  • Ecology
  • Symbiosis
  • Environmental Science

Background:

  • Lichens are widely recognized as key bioindicators for environmental quality and climate change.
  • Recent decades have seen significant expansion in understanding lichen responses to climate, yet knowledge gaps persist.

Purpose of the Study:

  • This review synthesizes current knowledge on lichen ecophysiology to predict responses to present and future climates.
  • It highlights advances and identifies critical challenges in the field.

Main Methods:

  • The review emphasizes a dual-scale approach: whole-thallus and within-thallus perspectives.
  • Key environmental drivers like vapor pressure differential (VPD) and internal symbiont dynamics are examined.

Main Results:

  • Whole-thallus responses are strongly influenced by water content and form, with VPD being a crucial factor.
  • Within-thallus changes, including symbiont shifts, offer acclimation pathways but require further study regarding carbon allocation and turnover.
  • Current research is biased towards larger, high-latitude lichens, underrepresenting biodiversity.

Conclusions:

  • Improving predictions of lichen responses to climate change necessitates broader geographic and phylogenetic coverage.
  • Future research should prioritize VPD, carbon allocation, symbiont turnover, and integrate physiological theory with functional traits.