Tree-stem diameter fluctuates with the lunar tides and perhaps with geomagnetic activity

0348404 - GFÚ 2011 RIV AT eng J - Journal Article
Barlow, P. W. - Mikulecký, M. - Střeštík, Jaroslav
Tree-stem diameter fluctuates with the lunar tides and perhaps with geomagnetic activity.
Protoplasma. Roč. 247, č. 1-2 (2010), s. 25-43. ISSN 0033-183X. E-ISSN 1615-6102
Institutional research plan: CEZ:AV0Z30120515
Keywords : lunisolar tidal acceleration * stem diameter variation * transpiration * Thule index
Subject RIV: DE - Earth Magnetism, Geodesy, Geography
Impact factor: 1.488, year: 2010

Our initial objective has been to examine the suggestion of Zürcher et al. (Nature 392:665–666, 1998) that the naturally occurring variations in stem diameter of two experimental trees of Picea alba were related to nearsimultaneous variations in the lunisolar tidal acceleration. The relationship was positive: Lunar peaks were roughly synchronous with stem diameter peaks. To extend the investigation of this putative relationship, additional data on stem diameter variations from six other tree species were gathered from published literature. Sixteen sets of data were analysed retrospectively using graphical representations as well as cosinor analysis, statistical cross-correlation and cross-spectral analysis, together with estimated values of the lunisolar tidal acceleration corresponding to the sites, dates and times of collection of the biological data.
Permanent Link: http://hdl.handle.net/11104/0188951