Streamflow Variability Indicated by False Rings in Bald Cypress (Taxodium distichum (L.) Rich.)
| Autor: | E. A. Elliott, Clay S. Tucker, Glenn A. Tootle, M. D. Meko, Justin T. Maxwell, Matthew D. Therrell, J. C. Bregy, Grant L. Harley |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
010504 meteorology & atmospheric sciences Growing season 01 natural sciences Taxodium Streamflow bald cypress Dendrochronology Precipitation Cypress 0105 earth and related environmental sciences Riparian zone geography geography.geographical_feature_category biology dendrochronology Forestry lcsh:QK900-989 biology.organism_classification tree rings intra-annual density fluctuation Taxodium distichum lcsh:Plant ecology Environmental science Physical geography Tropical cyclone 010606 plant biology & botany |
| Zdroj: | Forests, Vol 11, Iss 1100, p 1100 (2020) Forests Volume 11 Issue 10 |
| ISSN: | 1999-4907 |
| Popis: | Despite growing in wet lowland and riparian settings, Taxodium distichum (L.) Rich. (bald cypress) has a strong response to hydroclimate variability, and tree ring chronologies derived from bald cypress have been used extensively to reconstruct drought, precipitation and streamflow. Previous studies have also demonstrated that false rings in bald cypress appear to be the result of variations in water availability during the growing season. In this study 28 trees from two sites located adjacent to the Choctawhatchee River in Northwestern Florida, USA were used to develop a false ring record extending from 1881 to 2014. Twenty false ring events were recorded during the available instrumental era (1931&ndash 2014). This record was compared with daily and monthly streamflow data from a nearby gage. All 20 of the false-ring events recorded during the instrumental period occurred during years in which greatly increased streamflow occurred late in the growing season. Many of these wet events appear to be the result of rainfall resulting from landfalling tropical cyclones. We also found that the intra-annual position of false rings within growth rings reflects streamflow variability and combining the false-ring record with tree ring width chronologies improves the estimation of overall summer streamflow by 14%. Future work using these and other quantitative approaches for the identification and measurement of false ring variables in tree rings may improve tree-ring reconstructions of streamflow and potentially the record of tropical cyclone rainfall events. |
| Databáze: | OpenAIRE |
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