Parent Layer: Coastland

Name: Shallow Inlets & Bays

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Description: <abstract>This NPWS dataset shows shallow bays and inlets which are indentations of the coastline that have no freshwater input or only a low level, i.e., small streams and/or local rainfall runoff. They experience coastal salinities (+30S) continuously. Average water depth is c. 30 metres with at least half of the inlet/bay shallower than 30 metres. Their linear lengths exceed 2km and the length to width ratio is generally greater than 2:1. The levels of exposure to wave action vary from sheltered through semi-exposed to exposed. This is reflected in the sediment type with mud or sandy mud occurring in the sheltered sites to mixed sediments on semi-exposed sites to coarser sediments in exposed sites. The inner parts of some large inlets may be estuarine where the innermost area is strongly influenced by freshwater and are considered as the Annex I habitat Estuary, but the rest of the area is not. The variation in sediment types is reflected in the organic carbon content and numbers of species with maximum biological diversity in softer sediments and lowest diversity occurring in coarse material. Large shallow inlets and bays are a physiographic unit that hosts a great variety of habitats including, the Annex I habitats of the Directive, reefs and mudflats and sandflats not covered by seawater at all times. The sediment habitats and their communities within large shallow inlets are very varied reflecting the broad sediment types. Large shallow inlets and bays are located on all parts of the coastline.</abstract> <metadata>https://www.npws.ie/marine/marine-habitats/large-shallow-inlets-and-bays</metadata> <external>https://www.npws.ie/marine/marine-habitats/large-shallow-inlets-and-bays</external>

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