Fróðskaparrit - 01.01.2008, Page 177

ÚTBREIÐSLA AVSVARTAKLUKKUM (COLEOPTERA, CARABIDAEj
/' ÚTNYRÐINGSEYSTUROY OC HVUSSU ÁVIRKAST HON AV AVVEITING
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UD, see Tables 2, 3 and 4. To test whether
differences found in seasonality could be due
to small differences in number of sampling
days a Mann - Whitney test was performed
with the number of each carabidae species
calculated as individuals per trap per day.
This did not change the results.
Comparing OD, ND and UD
Area had major effect on the distribution of
Calathus fuscipes (P<0.001); no specimen
was found in the ND area, more Calathus
fuscipes were found in the UD area compa-
red with the OD area, but the difference was
not significant, see Tables 2 and 3.
Area had significant (P=0.007) effect on
distribution of Carbus problematicus. Most
Carabus problematicus were found in the
OD area, see Tables 2 and 3.. There was only
a significant difference between the UD and
the OD area (P = 0.002). However, this dif-
ference is explained by a high frequency at
an particular river in the OD area, and thus
does not represent the area as a whole.
Distribution of Nebria rufescens was
significantly (P=0.006) affected by area, and
most were found in the ND area compared
with the two other areas, see Tables 2 and 3.
There was no significant difference between
the OD and the UD area.
Area had significant (P<0.001) effect on
distribution of Notiophilus biguttatus, and
most were found in the ND area compared
with the two other areas, see Tables 2 and 3.
There was no significant difference between
the OD and the UD area.
Distribution of Patrobus atrorufus was
significantly (P<0.001) affected by area, and
most were found in the OD area compared
with the two other areas, see Tables 2 and 3.
There was no significant difference between
the UD and the ND area.
Distribution of Patrobus septentrionis
was also significantly (P<0.001) affected by
area, and most were found in the ND area,
see Tables 2, 3 and 4. All three areas differed
significantly from each other.
Discussion
Regarding species our results resamble those
by Bengtson (1981), except that a new spe-
cies to the Faroe Islands was recorded (Ago-
num fuliginosum). According to literature,
this is a common species in wet environ-
ments (Lindroth, 1986). Our specimen was
found in the outfield above Funningur; the
altitudes were 150 m and 180 m. The areas
where we found Agonumfuliginosum are rel-
atively wet. Alltogrether 15 species of cara-
bidae were found. Species most abundant in
our work were also described as most abun-
dant species in the work by Bengtson (1981;
1982); one exception is Carabus problemati-
cus which was not one of the most abundant
in the work by Bengtson (1981). This is be-
cause a relatively high percentage of our area
was covered by heather, which is a preferable
habitat to C. problematicus (Lindroth, 1985
and Cole et al., 2006). One of the carabidae
species Bembidion bruxellense has not been
recorded from Eysturoy before. B. bruxellense
is known from most of Europe, and is de-
scribed as occurring on most kind of soil
where the vegetation is not too dense (Lin-
droth,1985). West (1930) recorded Bembid-
ion bruxellense on two islands: Suðuroy and
Streymoy. Bengtson (1981) found no B. brux-
ellense although covering all the islands but
the smallest one. The present investigation