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Layer: Estuary (ID: 14)

Parent Layer: Conservation Objectives Habitats

Name: Estuary

Display Field: datasetName

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: <metadata>http://www.isde.ie/#/6eb57c37-6356-41ed-be93-d275c87833e1</metadata> <keywords> life science, ecology</keywords> Estuaries are habitat complexes which comprise an interdependent mosaic of subtidal and intertidal habitats, which are closely associated with surrounding terrestrial habitats. Many of these habitats, such as 1140 Mudflats and sandflats not covered by sea water at low tide, saltmarshes, 1110 Sandbanks which are slightly covered by sea water all the time and 1170 Reefs, are identified as Annex I habitat types in their own right. Estuaries are defined as the downstream part of a river valley, subject to the tide and extending from the limit of brackish water. There is a gradient of salinity from freshwater in the river to increasingly marine conditions towards the open sea. The input of sediment from the river, the shelter of the estuary from wave action, and the often low current flows typically lead to the presence of extensive intertidal sediment flats and sediment-filled subtidal channels. There is usually only a limited extent of rocky habitat. In contrast, marine inlets where seawater is not significantly diluted by freshwater are considered as Annex I type 1160 Large shallow inlets and bays.

Definition Expression: N/A

Copyright Text: National Parks and Wildlife Service

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