Fig. 3
From: Broad-scale patterns of abundance of non-indigenous soft-bottom invertebrates in Denmark
Densities of ‘new’ NIS (<100 years in Danish waters, ±SE) and cryptogenic species (N. succenea) for 26 broad spatio-temporal groupings (cf. Table 1). White bars correspond to 1970–1984 samples, grey bars to 1985–1994 samples and black bars to 1995–2004 samples. Note the different scales on Y-axis and that no samples were collected from >20 m at West in 1970–1984