Sõnastik (inglise)

Is exposed glacial clay. If exposed on the seafloor there is often a thin layer of coarser materials like sand or/and gravel on top indicating erosion conditions. See: glacial clay.

(see more athttp://www.epa.gov/osweroe1/content/hazsubs/cercsubs.htm and http://stateofthebalticsea.helcom.fi/pressures-and-their-status/)Substances that are considered severely harmful to human health and the environment. Many are commonly used substances which are harmless in their normal uses, but are quite dangerous when released to environment. Because of quantity, concentration, or physical, chemical, or infectious characteristics, they may: (1) cause or contribute to an increase in mortality or an increase in serious irreversible, or incapacitating illness in living organisms; or (2) pose a substantial present or potential hazard to human health or the environment when released or improperly treated, stored, transported, disposed of, or otherwise managed. The terms "hazardous substance" and "pollutant or contaminant" do not include petroleum or natural gas.

Perennial rooted plants which have vegetative shoots both below and above water surface.

Algae that take up organic molecules as a primary source of nutrition.

Group of aquatic plants which belong to divisions Bryophyta, Lycopodiophyta, Equisetophyta, Polypodiophyta and Magnoliophyta.

A root-like structure that anchors aquatic sessile organisms, such as seaweed, other sessile algae, stalked crinoids, benthic cnidarians, and sponges, to the substrate.

Period of geologic time spanning the last 11 700 years from the end of the Pleistocene period (and the end of the last ice age) to the present.

An area, where the birds (paired) get food and rear offspring. Home range does not always coincide with the concept of "territory", which is usually smaller in size and is actively protected from intruders.

Aquatic plants that grow wholly submerged in to water.

Plants living under conditions of plentiful moisture or very moist soil.