River Regulation Causes Rapid Changes in Relationships Between Floodplain Oak Growth and Environmental Variables

Frontiers in Plant Science
Maksym NetsvetovMaksym Romenskyy

Abstract

The radial growth of pedunculate oak (Quercus robur), a species often ecologically dominating European deciduous forests, is closely tied up with local environmental variables. The oak tree-ring series usually contain a climatic and hydrologic signal that allows assessing the main drivers of tree growth in various ecosystems. Understanding the climate-growth relationship patterns in floodplains is important for providing insights into the species persistence and longevity in vulnerable riverine ecosystems experiencing human-induced hydrology alteration. Here, we use 139 years long instrumental records of local temperature, precipitation, and water levels in the Dnipro River in Kyiv to demonstrate that the implementation of river regulation has decoupled the established relationship between the radial growth of floodplain oak and local hydro-climatic conditions. Before the river flow has been altered by engineering modifications of 1965-1977, the water level in the Dnipro River was the key driver of oak radial growth, as reflected in the tree-ring width and earlywood width. The construction of two dams has altered the seasonal distribution of water level diminishing the positive effect of high water on oak growth and subsequentl...Continue Reading

Citations

Dec 19, 2020·Global Change Biology·Radosław PuchałkaAndrzej M Jagodziński
Nov 16, 2021·Frontiers in Plant Science·Alexandre F NolinYves Bergeron

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Methods Mentioned

BETA
PCA

Software Mentioned

Qgis
COFECHA
R
SiZer
AxioVision
dplR
treeclim

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