Kelp forest as a habitat for mobile epifauna: case study of Caprella septentrionalis Kröyer, 1838 (Amphipoda, Caprellidae) in an Arctic glacial fjord

Figures & data

Fig. 1 Location of the sampling sites. Glaciers are indicated by the white areas.

Table 1 Mean abundance of Caprella septentrionalis per algal sample with minimum and maximum values in brackets at different sites (N, number of algae collected; F, frequency of caprellid occurrence on algal hosts). The frequency of occurrence (F) was estimated as the percentage of algal samples in which Caprella occurred in the total number of algae collected.

	Site
	Gåshamna		Hyrneodden		Isbjørnhamna		Total
Algae	Mean	N	Mean	N	Mean	N	Mean	N	F (%)
A. esculenta	5.5 (1–32)	48	6.2 (1–25)	36	3.3 (1–14)	38	4.9 (1–32)	122	21
L. digitata	1	26	1.3 (1–2)	32	1.6 (1–4)	21	1.4 (1–4)	79	11
S. latissima	(1–2)	45	(1–1)	42	1.3 (1–2)	68	1.3 (1–2)	155	9
D. aculeata	0	3	2.2 (1–4)	12	0	1	2.2 (1–4)	16	37
Total	3.6 (1–32)	122	3.1 (1–25)	122	2 (1–14)	128	2.9 (1–32)	372	15

Fig. 2 The population structure of Caprella septentrionalis in July.

Fig. 3 Caprella septentrionalis Kröyer, 1838 on the frond of kelp showing its typical vertical position. Photo by P. Kukliński.