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	年輪年代学	Phytolith分析
分野	農学	農学
系統	Process / pipeline	Process / pipeline
提唱年	1909	1841 (first description); modern analytical framework 1970s–1990s
提唱者	Andrew Ellicott Douglass	Multiple contributors (Ehrenberg, 1841; systematised by Rovner and Piperno, late 20th century)
種類	Archival and climate reconstruction method	Microscopic morphological analysis
原典	Douglass, A. E. (1909). Weather records in the growth of giant sequoias. Monthly Weather Review, 37(1), 713-714.	Piperno, D. R. (2006). Phytoliths: A Comprehensive Guide for Archaeologists and Paleoecologists. AltaMira Press. ISBN: 978-0759103481
別名	Tree-ring analysis, Chronology, Paleoclimatology	plant opal analysis, opal phytolith analysis, phytolith morphotype analysis
関連	3	1
概要	Dendrochronology is the science of dating and interpreting wood and climate from tree rings. Each annual ring records the tree's growth response to weather during that year: wide rings indicate favorable conditions (adequate water, warmth, light); narrow rings indicate stress (drought, cold, shade). By crossmatching ring-width patterns across trees and backward in time using dead wood, researchers construct chronologies extending centuries to millennia, providing archives of regional precipitation, temperature, and hydroclimate independent of instrumental records.	Phytolith analysis is a laboratory technique used to identify and quantify microscopic silica bodies deposited in plant cells, recovered from soils, sediments, or archaeological contexts. Because phytoliths preserve long after organic material has decayed, the method is central to reconstructing past vegetation, crop histories, land use, and soil development across agronomy, paleoecology, and archaeobotany.