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River Regulation Causes Rapid Changes in Relationships Between Floodplain Oak Growth and Environmental Variables
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Number of Authors: 62019 (English)In: Frontiers in Plant Science, ISSN 1664-462X, E-ISSN 1664-462X, Vol. 10, article id 96Article in journal (Refereed) Published
Abstract [en]

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 subsequently reversing this trend to negative, resulting from a seasonal ground water surplus. The decrease in the correlation between oak growth indices and the river's water level in April-June was unprecedentedly rapid and clearly distinguishable among other changes in the growth-to-climate relationship. Our findings further demonstrate that trees growing in areas exposed to urban development are the most susceptible to downside effects of river regulation.

Place, publisher, year, edition, pages
2019. Vol. 10, article id 96
Keywords [en]
Quercus robur, tree-ring, intra-annual ring-width, temperature, precipitation, water level, floodplain
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:su:diva-166550DOI: 10.3389/fpls.2019.00096ISI: 000457760500001PubMedID: 30804967OAI: oai:DiVA.org:su-166550DiVA, id: diva2:1293390
Available from: 2019-03-04 Created: 2019-03-04 Last updated: 2019-03-04Bibliographically approved

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Netsvetov, MaksymPuchalka, RadoslawKoprowski, MarcinKlisz, MarcinRomenskyy, Maksym
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