Table 3. Correlation coefficients between relative abundance of species in 1996 (our data) and 1961-1962 (BUZAS, 1965). No values are given for the data in PARKER (1952) because of the small range in longitude of her samples.

	1996	1961	1996	1961
species	longitude	longitude	depth	depth
	r2	r2	r2	r2
E. excavatum clavatum	-0.317	0.006	0.056	-0.375
B. frigida	0.248	0.005	0.164	0.120
E. advena	0.211	0.001	0.006	0.202
A. beccarii	0.332	0.009	0.012	0.009