In many cases these growth patterns represent annual growth increments analogous to annual rings in trees1.
Historically, growth rings (also called growth increments) were called annual rings.
As surface manifestations of internal enamel growth increments, perikymata provide a valuable source of information about enamel growth in fossils.
Stepwise multiple-regression models are conducted between tree-ring growth increments (TRGI) and monthly drought, precipitation and temperature series.
Annual growth increments are very thin, and cells are deformed a short distance from the cambium, because of the pressure exercised by the growing wood.
The model tracks temporally discrete growth increments in continuous space, representing growth architecture and the overgrowth process in significant geometric detail.
Difficulty in measuring small growth increments with traditional methods results in large measurement errors requiring many replications over long time spans.
Several investigations have called attention to the use of stable isotope profiles in growth increments of mollusc shells to determine the seasonal water temperature changes3 7 and seasonal timing of coastal upwelling8.
Just as tree rings contain a record of terrestrial climates2, systematic variations in the physical or chemical properties of annual growth increments in the skeletons of marine organisms record the environmental or climatic properties of the marine realm.
But, because the group publishing the olive branch claimed they could approximately recognize annual growth increments (tree-rings) – whereas most agree this is problematic to impossible in olives beyond the juvenile stage – much debate ensued.
