Bankinosoma lanceolata (Michael, 1885)

Kagainis, Uģis & Spuņģis, Voldemārs, 2013, Moss Mite (Acari, Oribatida) Communities In The Apšuciems Calcareous Fen, Latvia, Acta Biologica Universitatis Daugavpiliensis 13 (2), pp. 39-53 : 45-47

49. Bankinosoma lanceolata (Michael, 1885)

1 0,03 0,01

105 3,50 1,16

1 0,03 0,01

189 6,30 2,10

145 4,83 1,61

248 8,27 2,75

2 0,07 0,02

29 0,97 0,32

3 0,10 0,03

111 3,70 1,23

187 6,23 2,07

23 0,77 0,25

45

3,33

33,33

3,33

83,33

73,33

80,00

3,33

40,00

10,00

66,67

40,00

3,33

0,003

0,350

0,003

0,630

0,483

0,827

0,007

0,097

0,010

0,370

0,623

0,077

1

52

1

22

19

73

2

7

1

24

60

23 Distribution of Oribatida in the samples was influenced by vegetation ( Fig. 3 ). Axis 1 might be explained as changes from saw tooth sedge Cladium mariscus dominated sample plots to brown bog-rush Schoenus ferrugineus dominated, Axis 2 – might be changes in height of vegetation from tall at bottom to short at top or from monodominant plant cover to polydominant one. Among dominating oribatids Steganacarus (Atropacarus) striculus , Malacanothrus monodactylus and Nanhermannia comitalis negatively correlated with the Axis 1 (-0,677; -0,728; -0.557 respectively, n=30; p<0,01), while Trhypochthoniellus longisetosus f. longiseta – positively (0,631; n=30; p<0,01).

Cluster analysis ( Fig.4 ) showed that sample plots did not form definite groups according to vegetation.

At sample plots No 1-15 brown bog-rush Schoenus ferrugineus dominated while at sample plots No 15-30 – saw tooth sedge Cladium mariscus was the dominating plant species. Indicator Species Analyses of oribatid species showed that numerous species might be regarded as indicators in these groups. Of 56 species Trimalaconothrus angulatus , Hypochthonius rufulus , Nanhermannia comitalis , Scheloribates (Topobates) circumcarinatus , Oppiella (Oppiella) propinqua , Pilogalumna tenuiclava had the highest indicator values for brown bog-rush Schoenus ferrugineus dominated plots, while of 16 species Suctobelbella forsslundi , Suctobelbella palustris , Trhypochthoniellus longisetus f. longiseta and Scheloribates laevigatus – in saw tooth sedge Cladium mariscus dominated plots.

Spearman rank correlations ( Table 3) among dominant oribatid mite and plant species showed that dominating plant species weakly influence the distribution of mites in the Apšuciems fen.

Figures

Fig. 3. DCA ordination of sample plots based on Oribatid data on September 30th, 2009 at the Apšuciems fen. Axis 1 eigenvalue 0.310, Axis 2 – 0.099. Abbreviations: Schoenus – Schoenus ferrugineus, Drepanocl –Drepanocladus revolvens; Succisa – Succisa pratensis; Sesleria –Sesleria coerulea; Potentil – Potentilla erecta; Cladium – Cladium mariscus.

Fig. 4. Cluster dendrogramm of sample plots based on Oribatida data on September 30th, 2009 at the Apšuciems fen.