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Fig. 3 | Helgoland Marine Research

Fig. 3

From: The distribution of the invasive non-native gastropod Crepidula fornicata in the Milford Haven Waterway, its northernmost population along the west coast of Britain

Fig. 3

Habitat distribution in the Milford Haven Waterway. Habitat types were classified by grouping average percentage surface cover of five different substrata classes (Fine Sediment, Gravel, Boulder, Shell, Live habitat-forming species) that were either determined from 20 randomly selected still images of the seabed taken during the subtidal survey in August 2010 using a sled-mounted underwater still images camera, or from five digital images taken during intertidal surveys in 2009–2010. See “Methods” section for details on habitat classes (colour figure online)

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Helgoland Marine Research

ISSN: 1438-3888

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