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Journal of Plant Research

, 122:61 | Cite as

Phenology of 16 species of ferns in a subtropical forest of northeastern Taiwan

  • Pei-Hsuan Lee
  • Tzer-Tung Lin
  • Wen-Liang ChiouEmail author
Regular Paper

Abstract

A knowledge of fern phenology promotes understanding of the biology and ecology of ferns. In this study, the phenology of 16 fern species in a subtropical broadleaf forest (N24°46′, E121°34′) in northeastern Taiwan was monitored from August 1997 to August 2001. Every fern produced both fertile and sterile leaves in each year of the study. Most fertile leaves emerged in February and March, whereas most sterile leaves emerged from May to September. Most leaves reached full expansion during April–July and died during April–August. The average life span of leaves ranged from 4.4 months to 30.3 months. In seven species, fertile leaves lived longer than sterile leaves, but this difference was significant only in Pteris wallichiana. In the other nine species, sterile leaves lived longer than fertile leaves, but the difference was significant only in Cyathea spinulosa, Plagiogyria dunnii, and Plagiogyria adanata. The ephemeral fertile leaves of the two dimorphic species died soon after releasing their spores, at only 5 months of age. However, their sterile leaves survived for over 22 months. The fertile leaves of the other 14 species remained green for almost 2 years after releasing their spores. Sterile leaves remained sterile throughout their lives. Spores matured in May–July and were released in June–August. After spore release, the sporangia detached. No leaf produced a second cohort of sori. Several phenological events, including sterile leaf emergence, leaf expansion and senescence, and spore maturation and release, were significantly positively correlated with temperature but not with precipitation, whereas the emergence of fertile leaves was weakly negatively correlated with temperature and precipitation. However, those correlations varied among different species.

Keywords

Fern Fertile and sterile leaf Leaf life span Phenology Pteridology Seasonality 

Notes

Acknowledgments

We thank reviewers for their useful comments and Alan Warneke for English editing assistance. This research was supported by the Taiwan Forestry Research Institute.

Supplementary material

10265_2008_191_MOESM1_ESM.doc (286 kb)
Tables S1 and S2 (doc 286 KB)

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Copyright information

© The Botanical Society of Japan and Springer 2008

Authors and Affiliations

  • Pei-Hsuan Lee
    • 1
    • 3
  • Tzer-Tung Lin
    • 2
  • Wen-Liang Chiou
    • 1
    Email author
  1. 1.Division of Forest BiologyTaiwan Forestry Research InstituteTaipeiTaiwan
  2. 2.Fushan Research CenterTaiwan Forestry Research InstituteI-LanTaiwan
  3. 3.Luodong Forestry Administrative OfficeLuodong, I-LanTaiwan

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