Fróðskaparrit - 01.01.2009, Síða 178

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CHEMICAL SEDIMENT VARIABLES FROM THE FAROE AREA:
ORCANIC CONTENT, NITROCEN, PHOSPHORUS, ZINC, AND COPPER
Figure 8. Sampling sites reported by Johansen (2006).
2), it can be seen that total phosphorus was
between 0.43-2.02 g/kg. In relation to the or-
ganic content, the values were from 0.007 to
1985* 1987** 7987** 7997#
SK0S 6.6 11.3 71.8 9.0
7.1 7 2.8 73.8 8.4
10.0 7 7.6 70.4 8.8
5.5 70.2 7.6
7 7.4 6.2
73.6 72.5
SK07 10.4 72.2 77.7 70.7
9.8 72.0 9.8
10.5 17.6 70.4
9.7 10.3
0.170 gram phosphorus per gram organic
matter. When compared to Dam et al. (2003)
and Johansen (2006), very little difference is
seen between the samples. Hoydal and Dam
(2004) had values between 0.8 and 1.5 g/kg
and Johansen (2006) found values from 0.5
to 0.9 g phosphorus per kg dry sediment in
the outlaying regions.
Zinc
In addition to the data in Table 1 and 2, there
are two other reports from shallow waters
(Hoydal and Dam, 2004; Johansen, 2006) and
three reports (Grøsvik et al, 2000; Mannvik
and Petersen, 2002; Kaldbak Marine Biologi-
cal Laboratory, 2006) from deeper waters
around the Faroes with information on zinc
concentrations in the seabed sediments. The
valuesfrom shallow waters (< 100 m) are be-
tween 12-98 mg zinc per kg dry sediment,
while the data from deeper waters (>274 m)
are in the range 11-47 mg zinc per kg dry
sediment. It seems like shallow inshore sedi-
ments have somewhat higher values, com-
pared to sediments from deeper waters.
2000# 2001# 2003# 2005##
7.7 8.1 13.3 12.1
13.9
12.6
Table 12. LOI values (%) for all reported samples from SK05 and SK07. Data from Bloch et al, 1986 (*); Caard, 1990
(**), Hoydal and Dam, 2004 (#) and Johansen, 2006(##). The values for 2005 are given as a mean value in Table 7.