Full-text - Norsk entomologisk forening

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Norwegian stoneflies 1/ 217 Area 7. South Varanger In South Varanger, studies were carried out in two widely separated areas (Fig. 4): the Pasvik area and the Korpfjell area. The Pasvik area is situated in the northern part of the Sub-Alpine and Boreo-Montane subzone, while the Korpfjell area lies in the upper part of the Sub-Alpine belts, where it is close to the arctic vegetation zone (Sjiirs 1963). Area description Ten streams and five lakes in the Pasvik area, and three streams and two lakes in the Korpfjell area were investigated. The whole area belongs to the Precambrian 'Baltic shield', but there are differences in the Pasvik area. Around Spurvvann in the north-west, there are younger formations with intrusions of basic rocks. The Quarternary deposits are mainly moraine material (Boyum 1970). The climate is less continental than the Kautokeino area, but precipitation is low (below 400 mm a year). The Korpfjell area has the highest oceanity factor. The south-eastern parts of Pasvik consist mostly of boggy areas at an altitude of between 50 and 100 m a.s.l. In the west, the landscape is somewhat higher, with heights of about 200 m a.s.l. In the north-west it is even higher (about 300 m). The area investigated on Korpfjell lies between 200 and 260 m a.sJ. Most of the Pasvik area is covered by coniferous forest. Along the streams and rivers there is often a dense fringe of willow. In the north-west there are areas which lie on the border of the Sub-Alpine belt. There is also here a great deal of willow along the streams, especially in the lower parts. The flora is also described by Kalheber & Tobias (1971). On Korpfjell, birch woodland predominates around Korpvann, while above this and along the streams willow dominates. Stream descriptions The Pasvik area is dominated by the River Pasvik, which forms the border between Norway and the USSR. The river comes from lake Enare in Finland and is mainly slowflowing, with sand and gravel substrata. Fig. 11. Stream at Ivargammevann in Pasvik. Riffles, with substrata of larger stones, occur occasionally. Most of the streams in this area drain into the River Pasvik. The substratum of these is mostly large stones (Fig. 11), but there are also some streams with finer substrata of gravel and sand such as Gjokbekken (stream 4) and Skjellbekken (stream 7). In the Korpfjell area only three streams were investigated. They all had a mixed substratum of stones, gravel and sand. Measurements of hardness and pH were made on several occasions. Values of pH around 7.0 were common in the Pasvik area (see also Boyum 1970), and the lowest recorded was 6.6. Calcium hardness varied generally between 1 and 2 mg Ca+ + 11. The highest values were recorded in Storkilden, pH 7.4 and 3.0 mg Ca+ + 11 and a stream flowing from Spurvvann, pH 7.1 and 3.4 mg Ca++/1. On Korpfjell, Oterbekken had pH 6.5 and 1.7 mg Ca + + 11 and Bannebekken pH 6.7 and 2.2 mg Ca+ +11. Stonefly fauna In South-Varanger 24 species were recorded, 23 in Pasvik and 15 at Korpfjell, Table IX. At Korpfjell two of the 15 species were taken in lakes and 13 in streams. The total number of species taken in lakes in area 7 was 13, the highest in Norway. The dominating carnivorous species in the Pasvik area is Diura bicaudata, which was taken in great numbers in lakes. lake outlets and streams. Next to Diura bicaudata in abundance was the omnivore Isoperla obscura
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Norsk Entorriologisk Tidsskrift Nor
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451 1 I I I I I I I 4 6 8 10 12 14
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Dry Weight , mg. Fig. 7. Correlatio
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Table 11. Caloric values per g dry
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Talbe IV. Oxygen consumption given
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etween the sexes during the respira
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128 A. Fjellberg Fig. 2. A. sefiten
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130 A. Fjellberg HABITATS Until now
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132 L. Semme the autumn. The prelim
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'~0~1-0611 '96 'lourouy 'uu3 's3asu
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136 J. E. Brittain Fig. 1. The loca
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138 J. E. Brittain period was longe
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140 J. E. Brittain Table 11. Ph~sic
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142 J. E. Brittain Table IV. Physic
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144 J. E. Brittain EPHEMEROPTERA Am
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146 J. E. Brittain 0-3 NYMPHS I I 1
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148 J. E. Brittain 1-3 NYMPHS 01 I
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150 J. E. Brittain Nemzlrella picte
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152 J. E. Brittain ture and the inc
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(Nord-Norwegen) (Trichoptera, Pleco
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from anoxia. Drops of haemolymph we
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Notes on little known spiders in No
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Symphyla and Pauropoda from two con
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Symphyla and Pauropoda 163 Table 11
Page 51: sults it is clear that the animals
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Page 56 and 57: 170 T. R. Nielsen Table 1. A compar
Page 59 and 60: Abundance and diversity in the faun
Page 61 and 62: Nocturnal moths 175 Table 1. Number
Page 63 and 64: Nocturnal moths 177 Grimstad Amli 1
Page 65 and 66: Nocturnal moths 179 Am/i. Norway 19
Page 67 and 68: Nocturnal moths 181 Grimstad, Norwa
Page 69 and 70: Nocturnal moths 183 %60 50 40 30 20
Page 71 and 72: Spinosellina forms of Sminthurides
Page 73 and 74: A constant pressure microrespiromet
Page 75: Microrespirometer 189 termination o
Page 78 and 79: 192 F. E. Klallsen The specimens fr
Page 80 and 81: 194 F. E. Klausen REFERENCES Ardii,
Page 82 and 83: 196 A. Lillehammer present in Norwa
Page 84 and 85: 198 A. Lillehammer Results The numb
Page 86 and 87: 200 A. Lillehammer Fennoscandian co
Page 88 and 89: 202 A. Lillehammer parts of the are
Page 90 and 91: 204 A. Lillehammer carnivorous spec
Page 92 and 93: Table IV. Species distribution, in
Page 94 and 95: Table V. Species distribution in se
Page 96 and 97: 210 A. Lillehammer The bottom of th
Page 98 and 99: 212 A. Lillehammer Blatjemn Diura b
Page 100 and 101: Table VII. Species distribution in
Page 104 and 105: Table IX. Species distribution in s
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Page 108 and 109: 222 A. Lillehammer Table XI. The pH
Page 110 and 111: 224 A. Lillehammer These species se
Page 112 and 113: 226 A. Lillehammer Table XVI. The s
Page 114 and 115: 228 A. Lillehammer Fig. 22. Stream
Page 116 and 117: 230 A. Lillehammer Fig. 25. Distrib
Page 124 and 125: 238 A. Lillehammer high altitude la
Page 130 and 131: 244 A. Lillehammer streams and rive
Page 132 and 133: 246 A. Lillehammer Blies (1953, 195
Page 134 and 135: 248 A. Lillehammer streams are to a
Page 136 and 137: 250 A. Lillehammer Muller, K. 1955.
Page 138 and 139: 252 Bokanmeldelser produserende, en
Page 140 and 141: N orsk Entomologisk Tidsskrift Norw
Page 142 and 143: SHORT COMMUNICATIONS C. van Achterb
Page 144: publications on sale from Norsk Ent
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