Glossary (eng)

Plants that produce seeds (also known as phanerogams).

Reproduction and dispersal organ of algae and bryophytes. Can be diploid or haploid depending on the taxa.

Variability in data due to error in measurement, error in sampling, or variation in the measured quantity itself.

The population or biomass of a fishery resource. Such stocks are usually identified by their location. They can be, but are not always, genetically discrete from other stocks.

The relatively constant proportions of the different nutrients in plant or animal biomass that set constraints on production. Nutrients only available in lower proportions are likely to limit growth.

The relatively constant proportions of the different nutrients in plant or animal biomass that set constraints on production. Nutrients only available in lower proportions are likely to limit growth.

A rock fragment smaller than boulder and larger than silt having a diameter in the range of 60 - 600 mm (FIN). See also Pebble, Cobble.

A division of macro algaecontaining one order, the Charales. These are macroscopic plants often found growing in freshwater ponds attached to the bottom by rhizoids. They have a distinct main axis with whorls of branches arising from the nodes and superficially resemble certain higher plants. The thallus often becomes encrusted with calcium carbonate, hence the vernacular name. Sexual reproduction is oogamous. Also known as Charophytes.

Plural of "stratum"; in geology, layers (or beds) of rock or sediment. The term "strata" is used also with reference to the components comprising a stratified classification system.

(1) The science of rock strata. It is concerned not only with the original succession and age relations of rock strata but also with their form, distribution, lithologic composition, fossil content, geophysical and geochemical properties indeed, with all characters and attributes of rocks as strata; and their interpretation in terms of environment or mode of origin, and geologic history. All classes of rocks, consolidated or unconsolidated, fall within the general scope of stratigraphy. Some nonstratiform rock bodies are considered because of their association with or close relation to rock strata; (2) The science dealing with the description of all rock bodies forming the Earth's crust sedimentary, igneous, and metamorphic and their organization into distinctive, useful, measurable units based on their inherent properties or attributes. Stratigraphic procedures include the description, classification, naming, and correlation of these units for the purpose of establishing their relationship in space and their succession in time; (3) The arrangement of strata, esp. as to geographic position and chronologic order of sequence; (4) The sum of the characteristics studied in stratigraphy; the part of the geology of an area or district pertaining to the character of its stratified rocks.