Vertebrate animal that has the characteristic of starting its life in the water. At birth, an amphibian breathes through its gills, like a fish. As an adult he now has lungs through which he can breathe freely, but he continues to absorb most of the oxygen he needs through the skin.
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Framework Document elaborated in each metropolitan area, by the Regional Council and the regional prefect, in association with local stakeholders, locally developed the green and blue infrastructure. The Regional Ecological Coherence Scheme (SRCE) is to identify biodiversity reservoirs and ecological corridors that link them. It includes an action plan to ensure the preservation and restore ecological continuity identified while taking into account land use planning issues and human activities. The SRCE must also be compatible with the planning documents, such as territorial coherence…
Articulated invertebrate animal which have the characteristic of breathing through trachea. Some insects have become aquatic (representing 3% of insects) but have retained this aerial breathing.
Set of aquatic vertebrate animals which have the characteristic of being viviparous: the female lets the young grow in its belly, from which they get out alive. Marine mammals living in the oceans (cetaceans), as well as various freshwater species, such as the European otter, are aquatic mammals. Their mode of operation depends on the aquatic ecosystem where they live.
Fragmentation of a watercourse into several fragments, due to natural or artificial obstacles (i.e. sills, dams, weirs, etc), which may lead to a disruption into the ecological continuity, preventing the free movement of species or the smooth sediments flow.
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).
Fish species belonging to the Clupeidae family (such as sardine and herring). The allis shad are among the anadromous species (i.e. which swim up rivers to spawn in the middle part of the rivers). As such, their populations have paid a heavy price to river development (dams without fish pass facilities, extraction of gravel changing the spawning, etc). Their presence is therefore a good indicator of the status of a river development. Two species of allis shad are present (and exploited) in French waters: the allis shad (Alosa Alosa) and twaite shad (Alosa fallax).
For a river, to ensure the free movement of species (in particular fishes) and the smooth flow of sediments.
Is defined by the free circulation of biological species and good flow of natural river sediment transport. The concept of ecological continuity did not take sediment transport into account until the Water Act of 2006.