Exotic marker
Definition
A known quantity of an introduced pollen type (often Lycopodium clavatum spores from a calibrated tablet) added to a sample before processing. Allows calculation of pollen concentration per unit of original sample.
Related terms
- Acetolysis
- Erdtman's 1934 extraction method. The sample is treated with a 9:1 mixture of acetic anhydride and concentrated sulphuric acid, which dissolves cellulose...
- Assemblage
- The full community of diatom taxa present in a sample. The relative frequencies and absolute counts of species in an assemblage reflect...
- Pollen sum
- The total number of pollen and spore grains counted on a slide, used as the denominator for calculating the percentage of each...
- Provenance opinion
- The analyst's conclusion about the geographic or habitat origin of a pollen assemblage, expressed with explicit statement of confidence level, comparison data,...
- Reference collection
- A curated library of verified specimens from known species, subspecies, and geographic populations used as comparators in forensic identification. The depth and...
Explained in
- Forensic Palynology Methods and SamplingA known quantity of an introduced pollen type (often Lycopodium clavatum spores from a calibrated tablet) added to a sample before processing. Allows calculati...