Odonata - Entomological Society of Latvia - Latvijas Daba

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Figure 12. A distribution of Aeshna subarctica in Latvia in the 5x5 km square grid and geographic coordinate grid. The number of individuals found in the most part of the localities was one to three, only in some localities as many as seven or eight individuals were found. At the same time, the mean number of exuviae found in one locality (sample site) was five, maximum – 19 exuviae. The development of larvae was found mainly in the water bodies with the following micro habitats: water with Sphagnum; sunken, wet Sphagnum; Sphagnum with beak rush Rhynchospora alba and pod grass Scheuchzeria palustris, heather Calluna vulgaris and bog rosemary Andromeda polifolia (Table 8). In these water bodies also egg laying was observed. The water bodies were generally ~30-1000 m 2 in size. Table 8. The mean percentage of water and vegetation structure cover in the sample sites (K4, K6, K8, K9, K12) of the Lielais Ķemeru Bog and the number of found Aeshna subarctica exuviae in 2007 63 Structures / Sampling plot K4 K6 K8 K9 K12 Average Open water 24 0 21 26 20 18 Water with immerged Sphagnum mosses 13 42 5 1 19 16 Water with emerging Sphagnum mosses 20 36 24 9 18 21 Hummocks of Sphagnum mosses 3 2 3 2 5 3 Sphagnum mosses mixed with Eriophorum sp. 1 2 9 2 4 4 Sphagnum mosses mixed with Rhynchospora alba and 8 9 24 44 14 20 Scheuchzeria palustris Sphagnum mosses combined with Carex limosa 0 0 0 0 0 0 Ledum palustre and Vaccinium uliginosum 3 0 0 1 0 1 Calluna vulgaris and Andromeda polifolia 28 9 14 15 20 17 high Carex spp. 0 0 0 0 0 0 Trees 1 0 0 0 1 0. Exuviae 1 1 1 3 5
Ophiogomphus cecilia. The species was recorded in 79 squares that constitute 4.3 % of the 839 Latvian squares for which data on dragonflies are known and 2.8 % of all (2785) Latvian squares covering the territory of the country. From these, the species was found in 16 squares (4.3%) during the historic period and in 67 (10.2%) in the current period (Figure 13). Figure 13. A distribution of Ophiogomphus cecilia in Latvia in the 5x5 km square grid. In Latvia O. cecilia is found in rivers of various sizes (10-50 m wide), river segments with sand or gravel bottom with a thin layer of mud and scarce or no vegetation. In the stages of Gauja surveyed in a boat, the maximal number of adult individuals found in one kilometre was five, the mean number 1.6 individuals. In other localities in other rivers one to five individuals were observed. Leucorrhinia albifrons, L. caudalis and L. pectoralis. The species relative distribution in the 5x5 km square grid was given in Table 9. The distribution of L. albifrons represent in Figure 14, L. caudalis – Figure 15 and L. pectoralis – Figure 16. Table 9. The relative distribution in the 5x5 km square grid of Leucorrhinia albifrons, L. caudalis and L. pectoralis. Percentage was calculated from all squares with dragonfly data in the accordant period. Species Total number of squares, % Leucorrhinia albifrons 120 14.3 % Leucorrhinia caudalis 91 10.8 % Leucorrhinia pectoralis 140 16.7 % Number of historic squares, % 46 12.5 % 55 14.9 % 32 8.7 % Number of current squares, % 82 12.5 % 41 6.3 % 114 17.4 % 64
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LATVIJAS UNIVERSITĀTE Bioloģijas
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SATURS / CONTENT 1. IEVADS.........
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1.2. PĒTĪJUMA MĒRĶIS, DARBA UZD
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Citas publikācijas Kalniņš M., J
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2. MATERIĀLI UN METODES Pamatdati.
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izmantota standartizēta paraugu ie
Page 13 and 14: 3. REZULTĀTI 3.1. SPĀRU FAUNISTIS
Page 15 and 16: Dati par spārēm aptver 839 kvadr
Page 17 and 18: 3. tabulas turpinājums Taksons Aes
Page 19 and 20: Pēc procentuālā seguma transekt
Page 21 and 22: 3.3. GOMPHIDAE DZIMTAS SPĀRU KĀPU
Page 23 and 24: 11. attēls. Nehalennia speciosa iz
Page 25 and 26: Ophiogomphus cecilia. Suga konstat
Page 27 and 28: 16. attēls. Leucorrhinia pectorali
Page 29 and 30: sugas ar ļoti plašiem vai plašie
Page 31 and 32: faktors ir tas, cik kokaugu veģet
Page 33 and 34: sastopama oļu un akmeņu mikrobiot
Page 35 and 36: Salīdzinot sugas apdzīvotos bioto
Page 37 and 38: meklējumiem īpaši aizsargājamo
Page 39: 6. PATEICĪBAS Paldies darba vadīt
Page 42 and 43: The Doctoral thesis was developed i
Page 44 and 45: 1.2. THE AIM, TASKS AND THESES The
Page 46 and 47: Kalniņš M. 2006. The distribution
Page 48 and 49: 2. MATERIAL AND METHODS Basic data.
Page 50 and 51: 2.3. RESEARCH OF THE OCCURRENCE AND
Page 52 and 53: Figure 1. The location of dragonfly
Page 54 and 55: Table 2. Potential southern species
Page 56 and 57: unneum (Table 3). 59 distribution m
Page 58 and 59: 3.2. THE SPATIAL DISTRIBUTION OF DR
Page 60 and 61: Figure 7. Correlation between veget
Page 62 and 63: Pe 5% Gr 15% Co 12% Ma 3% Mu 26% De
Page 66 and 67: Figure 14. A distribution of Leucor
Page 68 and 69: 4. DISCUSSION 4.1. THE CHANGES IN D
Page 70 and 71: many other issues are not specific
Page 72 and 73: habitats of open or wooded bogs. Ac
Page 74 and 75: of its localities. This general cor
Page 76 and 77: Figure 19. A distribution of Aeshna
Page 78 and 79: suitability of a habitat is charact
Page 80 and 81: 6. ACKNOWLEDGEMENTS My thanks to my
Page 82 and 83: De Marmels J., Schiess H. 1977. Zum
Page 84 and 85: Niemelä J., Kotze J., Ashworth A.,
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Odonata - Entomological Society of Latvia - Latvijas Daba

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