Koubek, Tomas and Maskova, Tereza and Herben, Tomas (2023) Determinants of interspecific variation in season length of perennial herbs. ANNALS OF BOTANY, 132 (2). pp. 281-291. ISSN 0305-7364, 1095-8290
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Background and aims Perennial plants in seasonal climates need to optimize their carbon balance by adjusting their active season length to avoid risks of tissue loss under adverse conditions. As season length is determined by two processes, namely spring growth and senescence, it is likely to vary in response to several potentially contrasting selective forces. Here we aim to disentangle the cascade of ecological determinants of interspecific differences in season length. Methods We measured size trajectories in 231 species in a botanical garden. We examined correlations between their spring and autumn size changes and determined how they make up season length. We used structural equation models (SEMs) to determine how niche parameters and species traits combine in their effect on species-specific season length. Key results Interspecific differences in season length were mainly controlled by senescence, while spring growth was highly synchronized across species. SEMs showed that niche parameters (light and moisture) had stronger, and often trait-independent, effects compared to species traits. Several niche (light) and trait variables (plant height, clonal spreading) had opposing effects on spring growth and senescence. Conclusions The findings indicate different drivers and potential risks in growth and senescence. The strong role of niche-based predictors implies that shifts in season length due to global change are likely to differ among habitats and will not be uniform across the whole flora.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | INDICATOR VALUES; FLOWERING PHENOLOGY; PLANT; TRAITS; SENESCENCE; DATABASE; PRODUCTIVITY; CONSTRAINTS; TEMPERATURE; RESORPTION; Season length; growing season; growth phenology; leaf dry matter content; perennial plants; specific leaf area |
| Subjects: | 500 Science > 580 Botanical sciences |
| Divisions: | Biology, Preclinical Medicine > Institut für Pflanzenwissenschaften Biology, Preclinical Medicine > Institut für Pflanzenwissenschaften > Lehrstuhl für Ökologie und Naturschutzbiologie (Prof. Dr. Peter Poschlod) |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 22 Apr 2024 12:37 |
| Last Modified: | 24 Apr 2024 13:09 |
| URI: | https://pred.uni-regensburg.de/id/eprint/62491 |
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