Roemermann, Christine and Bucher, Solveig Franziska and Hahn, Melanie and Bernhardt-Roemermann, Markus (2016) Plant functional traits - fixed facts or variable depending on the season? FOLIA GEOBOTANICA, 51 (2). pp. 143-159. ISSN 1211-9520, 1874-9348
Full text not available from this repository. (Request a copy)Abstract
Traits are widely used to detect and explain responses of ecosystem processes to environmental changes. Various studies use trait data from databases, often providing one value per trait and species, neglecting intraspecific trait variability along spatio-temporal gradients. Handbooks for standardized trait measurements claim that traits should be measured at an 'optimal' stage, which is typically defined to be reached when the plants are in full blossom. However, it is unclear whether this method is appropriate. The main aim of this study was to quantify the extent to which trait values vary with season and phenology, a type of variation that has been overlooked so far relative to other sources of intraspecific variation. Further, we aimed to investigate whether species rankings remain consistent throughout the year. From April to November 2012, we monitored seven leaf traits [specific leaf area SLA, leaf dry matter content, chlorophyll fluorescence parameters (Fv/Fm, performance-index PI], stomatal density, stomatal size and the stomatal pore area index SPI) of 15 summer green woody species weekly under controlled conditions. In parallel, we recorded phenological stages. The results showed that all traits varied significantly throughout the year in a species-specific manner. We detected trait relationships with vegetative but not with flowering phenology. Species rankings were inconsistent throughout the season in all traits. We concluded that the seasonal timing of trait measurements is crucial. Most notably SLA, Fv/Fm and stomatal size were the most robust traits in terms of small intraspecific and large interspecific variation and showed largely consistent species rankings across seasons.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | NORTHWEST EUROPEAN FLORA; LIFE-HISTORY TRAITS; LEAF TRAITS; PHOTOSYNTHETIC APPARATUS; CHLOROPHYLL FLUORESCENCE; STOMATAL DEVELOPMENT; SPATIAL SCALES; VARIABILITY; DISTURBANCE; DIVERSITY; Fv/Fm; intraspecific trait variability; LDMC; phenology; SLA; stomatal density |
| Subjects: | 500 Science > 580 Botanical sciences |
| Divisions: | Biology, Preclinical Medicine > Institut für Pflanzenwissenschaften |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 22 Mar 2019 08:48 |
| Last Modified: | 22 Mar 2019 08:48 |
| URI: | https://pred.uni-regensburg.de/id/eprint/2794 |
Actions (login required)
 |
View Item |
