Tree stems and tides - A new approach and elements of reflexion

In the context of previous research on rhythmic tree stem diameter variations depending on the environmental factors (controlled greenhouse vs. outdoor), a high-sensitivity device was developed to measure low-potential electric currents along the bole of two trees (adult Picea abies / young Pinus ce...

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Bibliographic Details
Published inSchweizerische Zeitschrift für Forstwesen Vol. 157; no. 6
Main Authors Holzknecht, K. (Neumarkt (Italy)), Zuercher, E
Format Journal Article
LanguageEnglish
Published 01.06.2006
Subjects
ACCROISSEMENT DU DIAMETRE
BIOLOGICAL RHYTHMS
DIAMETER INCREMENT
ELECTRIC POTENTIAL
ENVIRONMENTAL FACTORS
EXPERIMENTACION
EXPERIMENTATION
FACTEUR DU MILIEU
FACTORES AMBIENTALES
FASES DE LA LUNA
FOTOPERIODISMO
INCREMENTO DE DIAMETRO
MOON PHASES
PHASE DE LA LUNE
PHOTOPERIODICITE
PHOTOPERIODICITY
PICEA ABIES
PINUS CEMBRA
POTENCIAL ELECTRICO
POTENTIEL ELECTRIQUE
RITMOS BIOLOGICOS
RYTHME BIOLOGIQUE
STEMS
TALLOS
TIGE
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Summary:In the context of previous research on rhythmic tree stem diameter variations depending on the environmental factors (controlled greenhouse vs. outdoor), a high-sensitivity device was developed to measure low-potential electric currents along the bole of two trees (adult Picea abies / young Pinus cembra) growing under open conditions (in Radein, South Tyrol). Rhythmic variations of the (bio-)electric potentials are found, with mainly the usual photoperiod during the vegetation time, and with clearly lunar periods during the winter rest. These results constitute a synthesis of the formerly apparently diverging results on diameter measurements, and confirm specific conditions under which lunar rhythms effectively occur.
Bibliography:2006000219
K10
ISSN:0036-7818
DOI:10.3188/szf.2006.0185