Table 1 Sources of database
From: Community dynamics of intertidal soft-bottom mussel beds over two decades
Data source | Year of investigation | Mussel bed | Core size (cm2) | Mesh size of the sieve (mm) | Sample depth (cm) | Sampling method | Data basis |
|---|---|---|---|---|---|---|---|
Asmus (1987 and unpubl. data) | 1983/1984 | Site 2 | 100 | 0.5 | 30 | Six sites with five samples each (n = 30) | Mean densities for September to November 1984 |
Albrecht (1991) | 1990 | Site 2 | 500 | 0.5 | 15 | Six samples within and six outside fucus-covered parts of the mussel bed (n = 12) | Mean densities, samples taken in August 1990 |
Hertzler (1995) | 1993 | Site 2 | 500 | 1 | 10–15 | Six samples at the edge of the mussel beds, in parts covered with fucus and parts without fucus, respectively (n = 18) | Mean densities, samples taken in August 1993 |
Mussel monitoring (unpubl. data) | 1999–2005 | Site 1 | 113 | 1 | 30 | Between 1999 and 2002 n = 10 each year, since 2003 n = 25 each year | Mean densities, sampling in September |