Глоссарий (анг)

Small or microscopic algae inhabiting the water column, neiston and benthic surfaces, such as diatoms.

A directed (not aimless) run and return occurring regularly in a species, usually at a definite stage in the life cycle, for example, anadromous (said of those fishes which spend most of their life in the sea and which migrate to freshwater to reproduce, e.g. Oncorhynchus, Stenodus, Petromyzon; the opposite is catadromous), catadromous (those fishes which spend most of their lives in freshwater and which migrate to the sea to reproduce, e.g. Anguilla, diadromous (those fishes which regularly migrate between fresh and salt water during a definite period of the life-cycle; includes anadromous and catadromous fishes), amphidromous (fishes which regularly migrate between the sea and fresh water or vice versa at some definite stage in their life cycle but not for the purpose of reproduction), potamodromous (those fishes which make true migrations wholly in freshwater, commonly rivers), oceanodromous (those fishes which make true migrations to sea water).

Optimal, in terms of feeding and protective conditions, sites located along the seasonal migration routes of birds, which serve as places to stop and rest.

Fish having the habit of migration. Oceanodromous fish live and migrate in the sea. Anadromous fish migrate from the sea to freshwaters to spawn and katadromous fish live in freshwaters, but spawn in the sea.

(1) The process or processes by which a mineral or minerals are introduced into a rock, resulting in a valuable or potentially valuable deposit. It is a general term, incorporating various types, e.g. fissure filling, impregnation, replacement. (Glossary of Geology) (2) A sum of concentrations of anions, kations and non-dissociated soluble inorganic substances, this sum is expressed in grams per dm3 (Russian Federation GOST 27075-86)

The validation of a model e.g. with an adjacent dataset to see if it gives similar results to the model.

A glacial deposit comprised of till (diamicton of unconsolidated glacial debris) found in currently glaciated and formerly glaciated regions. Different types of moraine are deposited beneath (ground moraine), alongside (lateral moraine), or at the end (terminal moraine) of a glacier.

See Bryophyta

Mass relocation of moulting birds, mostly waterfowl, to places with the optimal protective and feeding conditions.

A rounded feature of bathymetrically positive relief that rises above the level of surrounding seabed.