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Intraspecific character displacement in oaks.

Min Qi1, Jing Wang1, Rongle Wang1

  • 1School of Ecology and Nature Conservation, Beijing Forestry University, Beijing, 100083, People's Republic of China.

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|April 23, 2025
PubMed
Summary
This summary is machine-generated.

Intraspecific character displacement (ICD) drives morphological divergence within species. Competition in sympatry promotes varied leaf traits and resource strategies in oaks, suggesting ecological divergence.

Keywords:
Q. serrataQ. serrata var. brevipetiolataallopatrygenetic assignmentintraspecific variationleaf morphologysympatry

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Area of Science:

  • Evolutionary Biology
  • Ecology
  • Genetics

Background:

  • Character displacement explains species divergence due to competition.
  • Intraspecific character displacement (ICD) is a less-studied mechanism for divergence within species.
  • Competition can influence intraspecific competition and drive the evolution of alternative phenotypes.

Purpose of the Study:

  • Investigate how competition affects genetic and morphological differentiation within species in sympatric and allopatric populations.
  • Analyze divergence in Quercus serrata and Q. serrata var. brevipetiolata.
  • Explore resource-use strategies and ecological divergence driven by ICD.

Main Methods:

  • Genetic markers to detect population divergence and gene flow.
  • Geometric morphometric method (GMM) and traditional methods for leaf morphology analysis.
  • Analysis of trait variation in relation to environmental factors.

Main Results:

  • Detected genetic divergence between Chinese and Japanese populations of Q. serrata, with diversification within China.
  • Leaf morphological variation was greater in sympatric populations compared to allopatric ones.
  • Q. serrata var. brevipetiolata showed resource-conservative leaf traits in sympatry, indicating potential ecological divergence.

Conclusions:

  • Intraspecific character displacement plays a key role in morphological diversification within species.
  • Competition in sympatry influences resource-use strategies, favoring more conservative traits in later-diverged varieties.
  • Results suggest Q. serrata var. brevipetiolata is undergoing ecological divergence from Q. serrata.