1. 9
  2. Species

Species

Living communities

Updated on 26/10/2022
Définition
Sens technique

All living organisms (animals and plants including microorganisms) that occupy a given ecosystem. This group of living organisms is characterized by a specific composition and by interdependence phenomena. It occupies an area known as biotope and with the latter makes an ecosystem. A biocenosis changes over time (pioneer phase, intermediate phase and equilibrium phase).

Source
According to the Ministry for the Environment and OFB

Bryophyte

Updated on 13/07/2018
Définition
Sens commun
Aquatic moss that has the ability to accumulate metals and record pollution.
Source
According to the Ministry of Ecology

Tunicate

Updated on 04/07/2018
Définition
Sens commun
Marine invertebrate animal which surrounds itself with a cellulosic protective tunic at adulthood.
Source
According to the Ministry of Agriculture and IOWater

Gastropod

Updated on 04/07/2018
Définition
Sens commun
Creeping mollusc often having a spiral shell wherein its visceral mass is wound up and protected, and which moves by contraction of its broad single foot.
Source
According to the Ministry of Agriculture and IOWater

Echinoderm

Updated on 04/07/2018
Définition
Sens commun
Marine animal characterized by a fivefold radial symmetry, protected, depending on the species, by calcareous spikes or more or less developed calcite plates. Echinoderms include the starfishes, crinoid (sea daffodil), sea urchins, sea cucumbers and brittle stars. They have tubular "feet" and are able to move (very) slowly.
Source
According to the Ministry of Agriculture and IOWater

Bivalve

Updated on 04/07/2018
Définition
Sens technique
A filtering lamellibranch mollusc with a calcareous shell with two lateral valves (bivalve). Bivalve molluscs are separated into two classes: burrowing bivalves that live at the sediment surface or buried in it (carpetshells, cockles, clams), and non-burrowing bivalves that live attached to a hard substrate (oysters, mussels).
Source
According to the Ministry of Agriculture and IOWater

Diadromous migratory fish

Updated on 19/06/2018
Définition
Sens commun

Species having part of their biological cycle in freshwater and the other part in saltwater.

Source
according to Rhine-Meuse Water Agency