Growth patterns of roadside Tilia spp. affected by climate and street maintenance in Helsinki
| Autor: | Antti Mäkelä, Alar Läänelaid, Kristina Sohar, Juha Raisio, Samuli Helama |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Ecology biology Moisture Minimum radius Soil Science Forestry 010501 environmental sciences 15. Life on land engineering.material biology.organism_classification 010603 evolutionary biology 01 natural sciences Water scarcity Radial growth 13. Climate action Tilia engineering Environmental science Precipitation Physical geography 0105 earth and related environmental sciences Lime Chronology |
| Zdroj: | Urban Forestry & Urban Greening. 53:126707 |
| ISSN: | 1618-8667 |
| Popis: | Urban trees growing in roadside locations encounter stressful impacts in terms of atmospheric and soil conditions and mechanical damage. Here, a set of lime trees from a roadside location in Helsinki was analysed for their radial growth and tree-ring width variability in relation to climate records, effects from salt injury and mechanical damage the trees have experienced during their lifetime. Cross sections of the stems were found to be eccentric in shape, the maximum radius being commonly between NW and NE (the direction of the street), whereas the minimum radius was typically found towards W or E. The level of mechanical damage corresponded with the level of eccentricity expressed as the ratio between the longest and shortest radii. Growth rates approximated those of lime trees from parks in Tallinn (Estonia) but were markedly lower than those recorded previously from London (UK). The tree-ring chronology was correlated positively with the late-winter (February through March) temperature and early-summer (June) precipitation. The summer moisture signal was found to enhance over the recent decades, which likely indicates increased vulnerability to droughts and water scarcity. In addition to climatic events, the yearly amounts of road salting were negatively correlated with tree-ring anomalies. This evidence demonstrates the multiple stressors to the trees in urban roadside locations guiding their management options and shows the potential of Tilia to become a major tree genus for urban dendrochronological studies. |
| Databáze: | OpenAIRE |
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