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Contrasting effects of light, soil chemistry and phylogeny on leaf nutrient concentrations in cave-dwelling plants

  • Kundong BaiEmail author
  • Yigang Wei
  • Denan Zhang
  • Longfei Fu
  • Shihong Lv
  • Lili Deng
Regular Article
  • 67 Downloads

Abstract

Background and aims

The drivers of variations in leaf nutrient concentrations in cave-dwelling plants remain poorly understood. We aimed to explore the effects of light, soil chemistry and phylogeny on leaf nutrient concentrations in cave-dwelling plants.

Methods

We quantified light availability and sampled top-soils and leaves of the co-existing herbs and ferns in three caves. We used the traditional and phylogenetic comparative methods to determine the effects of light, soil chemistry and phylogeny on leaf nutrient concentrations and the cross-species correlations between leaf nutrients.

Results

Leaf nutrient concentrations differed little among caves due to the non-significant relationships of leaf nutrient concentrations with light availability and soil nutrient concentrations across caves. The phylogenetic signals in leaf nutrient concentrations were significant for Ca, Mg and N but non-significant for the remaining nutrients. The evolutionary rates of leaf nutrient concentrations tended to increase with decreasing phylogenetic signals and were faster in herbs than ferns. These contrasting degrees of phylogenetic conservatism in leaf nutrient concentrations were best generated by Ornstein-Uhlenbeck models, i.e., stabilizing selection towards an optimum across species for P, K, S, Fe, Mn and Zn or higher optimal concentrations in herbs than ferns for Ca, Mg and N. Strong cross-species correlations between leaf nutrient concentrations such as Ca vs Mg and N vs P were found.

Conclusions

Leaf nutrient concentrations in cave-dwelling plants showed convergent adaptations to cave environments and presented contrasting degrees of phylogenetic conservatism to produce leaf nutritional diversity for the co-existing herbs and ferns in caves.

Keywords

Cave-dwelling plants Leaf nutrient concentrations Phylogenetic conservatism Light Soil chemistry Phylogenetic comparative methods Stabilizing selection 

Notes

Acknowledgements

This research was supported by the Guangxi Natural Science Foundation (2013GXNSFBA019079), Guangxi Scientific and Technological Project (1355007-3) and National Natural Science Foundation (31570307; 31860042; 31860174) in China. Special thanks to the anonymous reviewers and the responsible editor (Alfonso Escudero) for providing insightful comments on the early versions of the manuscript.

Supplementary material

11104_2020_4422_MOESM1_ESM.docx (11.7 mb)
ESM 1 (DOCX 12009 kb)

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Copyright information

© Springer Nature Switzerland AG 2020

Authors and Affiliations

  1. 1.Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst TerrainGuangxi Institute of Botany, Guangxi Zhuang Autonomous Region and Chinese Academy of SciencesGuilinChina
  2. 2.College of Plant and Ecological EngineeringGuilin University of TechnologyGuilinChina

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