Functional shifts in leaves of woody invaders of deciduous forests between their home and away ranges

Kelsey A. Martinez, Jason D. Fridley, Riichi Oguchi, Masahiro Aiba, Kouki Hikosaka

Research output: Contribution to journalArticle

Abstract

Temperate forests are widely invaded by shade-tolerant shrubs and trees, including those of Eastern North America (ENA). However, it remains unknown whether these invaders are 'preadapted' for success in their new ranges due to unique aspects of their evolutionary history or whether selection due to enemy release or other postintroduction processes have driven rapid evolution in the invaded range. We sampled leaf traits of populations of woody understory invaders across light gradients in their native range in Japan and in their invaded ENA range to examine potential phenotypic shifts related to carbon gain and nitrogen use between ranges. We also measured leaf traits in three co-occurring ENA native shrub species. In their invaded range, invaders invested significantly less in leaf chlorophyll content (both per unit leaf mass and area) compared with native range populations of the same species, yet maintained similar rates of photosynthesis in low light. In addition, compared with ENA natives, ENA invaders displayed greater trait variation in response to increasing light availability (forest edges, gaps), giving them a potential advantage over ENA natives in a variety of light conditions. We conclude that, for this group of species, newly evolved phenotypes in the invaded range are more important than preadaptation for their success as shade-tolerant forest invaders.

Original languageEnglish (US)
Pages (from-to)1551-1560
Number of pages10
JournalTree physiology
Volume39
Issue number9
DOIs
StatePublished - Jun 25 2019

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Homing Behavior
North America
deciduous forests
Light
leaves
Population Groups
shade
shrubs
Photosynthesis
Chlorophyll
temperate forests
edge effects
Population
understory
Forests
Japan
Nitrogen
Carbon
History
photosynthesis

Keywords

  • chlorophyll content
  • ecophysiology
  • invasive species
  • photosynthesis
  • shade tolerance

ASJC Scopus subject areas

  • Physiology
  • Plant Science

Cite this

Functional shifts in leaves of woody invaders of deciduous forests between their home and away ranges. / Martinez, Kelsey A.; Fridley, Jason D.; Oguchi, Riichi; Aiba, Masahiro; Hikosaka, Kouki.

In: Tree physiology, Vol. 39, No. 9, 25.06.2019, p. 1551-1560.

Research output: Contribution to journalArticle

Martinez, Kelsey A. ; Fridley, Jason D. ; Oguchi, Riichi ; Aiba, Masahiro ; Hikosaka, Kouki. / Functional shifts in leaves of woody invaders of deciduous forests between their home and away ranges. In: Tree physiology. 2019 ; Vol. 39, No. 9. pp. 1551-1560.
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