CC BY
21ж
Амурский зоологический журнал, 2020, т. XII, № 2
Amurian Zoological Journal, 2020, vol. XII, no. 2
www.azjournal.ru
UDC 593.11
DOI: 10.33910/2686-9519-2020-12-2-189-200
http://zoobank.org/ References/4CB26CB1-DD71-4103-BA5E-96DA77C14082
A COMPARATIVE ANALYSIS OF FRESHWATER TESTATE AMOEBAE SPECIES COMPOSITION BETWEEN THE SOUTHEASTERN PART OF AZERBAIJAN AND OTHER REGIONS
OF AZERBAIJAN
E. N. Tahirova®, N. Yu. Snegovaya
Institute of Zoology, Azerbaijan National Academy of Sciences, 504th Block, 1128th Side Str., A. Abbaszadeh Str.,
AZ 1073, Baku, Azerbaijan
Abstract. A study of freshwater testate amoebae fauna of the Lankaran natural area of Azerbaijan was conducted from 2013 to 2018, revealing 126 testacean species belonging to 11 families. Long-term research in south-eastern regions of Azerbaijan demonstrated that the genus Difflugia dominated in all investigated freshwater reservoirs with high species diversity. Our study aimed to identify and analyze the degree of similarity in species composition of testate amoebae fauna in various investigated regions of Lankaran natural area, as well as between Lankaran and other regions of Azerbaijan. The cluster analysis and the Czekanowski index were used to compare species composition, yielding consistent results. Our analysis indicated the highest similarity between the species composition of the Lankaran region and Northern Azerbaijan. The Czekanowski index for these regions was also high (35.96 %). The analysis showed that there are 3 clusters of similarity of testate amoebae communities. One of them encompasses 2 regions (56.17 %) of Azerbaijan (south-eastern and north-eastern parts), the second combines these two points with the Absheron peninsula (52.98 %). And the third cluster covers the western region and the remaining 3 points (42.9 %). Keywords: south-eastern Azerbaijan, testate amoebae, cluster analysis, freshwater.
Authors
Elyana N. Tahirova E-mail: tahirovaelyane@mail.ru Scopus Author ID: 56641628400 ORCID: 0000-0001-9559-9527
Natalya Yu. Snegovaya E-mail: snegovaya@yahoo.com AuthorlD: 211180 Scopus Author ID: 6507041376 ORCID: 0000-0001-6060-6491
Copyright: © The Authors (2020). Published by Herzen State Pedagogical University of Russia. Open access under CC BY-NC License 4.0.
СРАВНИТЕЛЬНЫМ АНАЛИЗ ВИДОВОГО СОСТАВА ПРЕСНОВОДНЫХ РАКОВИННЫХ АМЕБ ЮГО-ВОСТОЧНОЙ ЧАСТИ АЗЕРБАЙДЖАНА С ДРУГИМИ
РЕГИОНАМИ СТРАНЫ
Э. Н. Тагирован, Н. Ю. Снеговая
Институт зоологии Национальной Академии Наук Азербайджана, ул. А. Аббасзаде, 1128 пер., 504 кв.,
Сведения об авторах
Тагирова Эльяна Наиль E-mail: tahirovaelyane@mail.ru Scopus Author ID: 56641628400 ORCID: 0000-0001-9559-9527 Снеговая Наталья Юрьевна E-mail: snegovaya@yahoo.com AuthorlD: 211180 Scopus Author ID: 6507041376 ORCID: 0000-0001-6060-6491
Права: © Авторы (2020). Опубликовано Российским государственным педагогическим университетом им. А. И. Герцена. Открытый доступ на условиях лицензии СС BY-NC 4.0.
AZ 1073, г. Баку, Азербайджан Аннотация. В 2013-2018 гг. было проведено исследование фауны пресноводных раковинных амеб Ленкоранской природной области Азербайджана. В результате исследований выявлено 126 видов раковинных амеб, относящихся к 11 семействам. В ходе многолетних исследований, проведенных в юго-восточном Азербайджане, было отмечено, что представители доминировали с высоким видовым разнообразием во всех исследованных пресных водоемах. Нашей целью было выявить и проанализировать степень сходства видового состава фауны раковинных амеб различных исследованных районов Ленкоранской природной области, а также с другими регионами Азербайджана. Кластерный анализ и индекс Чекановского — Сёренсена были использованы для сравнения видового состава. Результаты обоих анализов совпадают. По результатам анализа наибольшее сходство отмечено между видовым составом Ленкоранского района и Северного Азербайджана. Индекс Чекановского — Сёренсена также был высоким для перечисленных регионов (35,96 %). Анализ показал, что существует 3 кластера сходства сообществ раковинных амеб. Один из них объединяет 2 региона (56,17 %) Азербайджана (юго-восточные и северо-восточные части), второй объединяет эти два пункта с Апшеронским полуостровом (52,98 %). А третий кластер охватывает Западный регион и 3 остальных пункта (42,9 %).
Ключевые слова: юго-восточный Азербайджан, раковинные амебы, кластерный анализ, пресная вода.
INTRODUCTION
The first stage in the investigation of the structure of the fauna is usually associated with its study. It is not enough to study the structure of a single fauna unit to understand its characteristics or achieve further insight into its genesis. It is only after a detailed comparison of the fauna structures of different regions that their differences and particular qualities become apparent. For such comparisons, specific groups of organisms in neighboring regions are usually targeted. To obtain reliable results, the amount of data available for each group of organisms should be approximately the same. However, this condition is often not feasible, due to poor data availability or quality in regards to many animal groups.
A comparative fauna analysis usually begins with a study of the lists of species of local fauna, focusing on qualitative differences, i.e. on taxons (species, genera, families, etc.) that are only present in one of the compared faunas. The number of species (genera, families, etc.) that are characteristic for only one local fauna is usually an indicator of its uniqueness.
The presence or absence of specific taxa and their total number in a given fauna is most often graphically depicted using histograms showing the percentage ratio of the number of species in certain taxa. In a comparative analysis, it is highly important to establish the degree to which the faunas of two specific regions are similar or different. This can be represented more clearly using several well-proven quantitative methods (Bray, Curtis 1957). Several formulas have been proposed for the mathematical expression of the degree of similarity of faunas of two different regions. The Czekanowski coefficient can also be used (Czekanowski 1913).
MATERIAL AND METHODS
Samples of plankton, periphyton and benthos were collected in 2013-2018 from different freshwater basins of 6 districts of Lankaran natural area in Azerbaijan (Fig. 1). Figure 1 also shows some studied regions of Azerbaijan. However, we also compared our results with
fauna data from other regions of Azerbaijan. Plastic bottles were used to collect benthic samples. Plankton samples were collected using a plankton mesh. The samples of periphy-ton were collected by scraping biofilm and pick up water in places of aquatic plant thickets (Alekperov, Asadullaeva, Zaidov 1997). A quantitative account of testate amoebae was conducted in a FlowCam densitometer in 5 ml of water. Specimens were caught in microcap-illary tubes and studied in vivo and through the glycerol preparations. For scanning electron microscopy (SEM) the cells were transferred to cover glass with micro-capillary tubes, dried and then coated with gold. The shell morphology of testate amoebae was examined using a scanning electron microscope JEOL JCM-6000 operating at 5-15 kV.
Fig. 1. Location of sampling points: 1 — south-eastern part of Azerbaijan (Lankaran natural area); 2 — Absheron peninsula; 3 — north-eastern part of Azerbaijan (Khachmaz district); 4 — western part of Azerbaijan (Goygol); 5 — Nakhichevan Autonomous Republic
Рис. 1. Расположение точек сбора: 1 — юго-восточная часть Азербайджана (Лен-коранская природная область); 2 — Ап-шеронский полуостров; 3 — северо-восточная часть Азербайджана (Хачмазский район); 4 — западная часть Азербайджана (Гейгел); 5 — Нахичеванская Автономная Республика
Bray-Curtis cluster analysis was used to compare the degree of similarity in species diversity of different investigated regions of Azerbaijan (Bray, Curtis 1957). The Czekanowski index was used to identify the similarity of species composition of testate amoebae fauna of various investigated regions, according to the formula (Czekanowski 1913):
Ksc = 2c / (a + b), where: a — the number of species in one community, b — number of species in the second community, c — the number of species which are common to both communities. All data were calculated by the "Biodiversity Professional 2" PC Software program.
RESULTS AND DISCUSSION
In total, 126 species of testate amoebae were found in freshwater reservoirs of Lankaran natural area (Table 1). Representatives of the genus Difflugia (63 species) were dominant in all studied water bodies of Lankaran natural area. They are followed by representatives of the genera Centropyxis and Arcella, which recorded 18 and 17 species, respectively (Tahi-rova 2018).
The aim of this work is to study the fauna of the testate amoebae of the Lankaran natural area of Azerbaijan and to identify its features and specific traits. we conducted a comparative analysis of the commonality between the faunas of testate amoebae from different regions of Azerbaijan. As compared areas, we took the most studied areas of Azerbaijan: North-Eastern Azerbaijan, Western Azerbaijan and the Absheron peninsula. A testate amoebae fauna survey of these regions has been carried out by N. Snegovaya and I. Alek-perov (Alekperov, Snegovaya 2000; Snegovaya, Alekperov 2005; 2009; Snegovaya, Tahirova 2015). According to the available data, the number of species of testate amoebae in North-Eastern Azerbaijan is 60, in Western Azerbaijan — 72 species and the Absheron peninsula — 110 species. In total, 218 species of testate amoebae were registered in all compared regions of Azerbaijan. Of course, these do not represent a complete list of testate amoebae, as the study of testate amoebae fauna in all regions is ongoing. We also conducted short-term studies in the Nakhchivan Autonomous Republic (Snegovaya, Tahirova 2018). As a result of investigations carried
Table 1
Freshwater testate amoebae species composition and distribution in the investigated regions of
Azerbaijan
Таблица 1
Видовой состав и распространение пресноводных раковинных амеб в исследованных
районах Азербайджана
№ Species 1 2 3 4
Phylum Amoebozoa Lühe, 1913, emend. Cavalier-Smith, 1998
Subphylum Lobosa Carpenter, 1861
Class Tubulinea Smirnov et al., 2005
Order Arcellinida Saville, Kent, 1880
Family Arcellidae Ehrenberg, 1830
1. Amphizonella violacea Greeff, 1886 +
2. Arcella arenaria Greeff, 1866 + + +
3. A. polypora Penard, 1902 + + +
4. A. conica Playfair + +
5. A. vulgaris Defflandre, 1928 + + + +
6. A. vulgaris v. undulata Deflandre, 1928 +
7. A. gibbosa Penard, 1890 + + +
8. A. gibbosa laevis Deflandre, 1928 +
9. A. artocrea Leidy, 1876 + + +
10. A. megastoma Penard, 1926 + + +
Table 1. Continued Таблица 1. Продолжение
№ Species 1 2 3 4
11. A. megastoma arcuata Deflandre, 1928 +
12. A. dentata Ehrenberg, 1832 + +
13. A. exсavata Cunningham, 1919 + +
14. A. discoides Ehrenberg, 1872 + + +
15. A. discoides ssp.scutelliformis Playfair, 1918** +
16. A. rotundata Playfair, 1918 +
17. A. brasiliensis Cunha, 1913 +
18. A. mitrata Leidy, 1876 +
19. A. hemispherica Perty, 1852 + + + +
20. A. bathystoma Deflandre, 1928 +
21. A. atava Collin 1914 +
22. A. catinus Penard, 1890 + +
23. A. crenulata Deflandre, 1928 + +
Family Trigonopyxidae Loeblich et Tappan, 1964
24. Cyclopyxis arcelloides Penard, 1902 +
25. C. kahli Deflandre, 1929 + + + +
26. C. intermedia Kufferath, 1932 +
27. C. euristoma Deflandre, 1929 + + + +
28. C. penardi Deflandre, 1929 + +
29. C. ambigua Bonnet et Thomas, 1960 +
30. Trigonopyxis arcula (Leidy, 1879) + + +
Family Centropyxidae Deflandre, 1953
31. Centropyxis aculeata Ehrenberg, 1838 + + + +
32. C. aculeata v. oblonga Deflandre, 1929 +
33. C. spinosa Cash, 1905 + + + +
34. C. aerophila Deflandre, 1929 + + + +
35. C. gibba Deflandre, 1929 +
36. C. pileformis Snegovaya et Alekperov, 2009 +
37. C. trigonostoma Snegovaya et Alekperov, 2009 +
38. C. pectinata Snegovaya et Alekperov, 2009 +
39. C. plagiostoma Bonnet et Thomas, 1956 + +
40. C. elongata (Penard, 1890) + + + +
41. C. ecornis Ehrenberg, 1838 + + + +
42. C. platystoma Penard, 1890 + + +
43. C. percolabiensis Dekhtyar 1994 +
44. C. hirsuta Deflandre, 1929 + + + +
45. C. discoides (Penard, 1890) + + + +
46. C. kurakchayensis Snegovaya et Alekperov, 2005 + +
47. C. marsupiformis (Wall, 1864) + + +
48. C. cassis (Wallich, 1864) + +
49. C. constricta (Ehrenberg,1838) Deflandre, 1929 + +
50. C. hemisphaerica (Bernard, 1879) + + +
51. C. mirabilis Bartos, 1940 +
52. C. minuta Deflandre, 1929 + +
53. C. silvatica (Deflandre, 1929) + +
54. C. compressa van Oye, 1948 +
55. C. laevigata Penard, 1890 +
56. Ellipsopyxis lamottei Bonnet, 1974 +
Table 1. Continued Таблица 1. Продолжение
№ Species 1 2 3 4
57. Oopyxis lenkoranica Snegovaya et Alekperov, 2010 +
58. Hoogenraadia cryptostoma Gauthier-Lièvre et Thomas,1958 +
Family Plagiopyxidae Bonnet et Thomas, 1960
59. Plagiopyxis minuta phanerostoma Bonnet, 1959 +
60. P declivis Thomas, 1958 +
Family Difflugiidae Awerintzev, 1906
61. Difflugia acuminata Ehrenberg, 1838 + + +
62. D.acuminata v.curvata Cash, 1909 + +
63. D. acuminata v.inflata Penard 1899 + +
64. D. acuminata v. magna Deflandre, 1926 +
65. D. ampullula Playfair, 1918 +
66. D. claviformis Penard, 1899 + + +
67. D. microclaviformis Ogden, 1983* +
68. D. corona Wallich, 1864 + + + +
69. D. corona ssp. ecornis Gauthier-Lièvre et Thomas, 1958 + + +
70. D. corona ssp. tuberculata Vuchetich, 1973** +
71. D. difficilis Thomas, 1972 + + + +
72. D. distenda, Ogden, 1983 +
73. D. elegans Penard, 1890 + + + +
74. D. elegans teres Penard, 1899 + + +
75. D. capreolata Penard, 1902 + + +
76. D. giganteacuminata Chardez, 1958 +
77. D. globulosa Dujardin, 1837 + + +
78. D. globularis Wallich, 1864 + + +
79. D. pressula Snegovaya et Alekperov, 2010 +
80. D. mamillaris Penard, 1893 +
81. D. gramen Penard, 1902 + + + +
82. D. tuberculata Wallich, 1864 +
83. D. scalpellum Penard, 1899 + +
84. D. sarissa Li Sun Tai, 1931 + +
85. D. limnetica Penard, 1902 +
86. D. linearis (Penard, 1890) Gauthier-Lièvre et Thomas, 1958 +
87. D. litophila Gauthier-Lièvre et + +
88. D. myriformis Gauthier-Lièvre et Thomas, 1958 + +
89. D. oviformis Cash, 1909 +
90. D. penardi Hopkinson, 1909 + + +
91. D. pyriformis Perty, 1849 +
92. D. urceolata Carter, 1864 + +
93. D. pristis Penard, 1902 + + +
94. D. oblonga Ehrenberg, 1838 + + +
95. D. oblonga v. parva Thomas, 1954 + +
96. D. lanceolata Penard, 1890 + + +
97. D. lobostoma Leidy, 1879 + + + +
98. D. lobostoma multilobata Gauthier-Lièvre and Thomas, 1958 + +
99. D. manicata Penard, 1902 +
100. D. bipartis Godeanu, 1972 +
101. D. decloitrei Godeanu, 1972 +
102. D. bacilifera Penard, 1890 +
Table 1. Continued Таблица 1. Продолжение
№ Species 1 2 3 4
103. D. sapnakeranica Snegovaya et Alekperov, 2010 +
104. D. cratera Leidy, 1877 +
105. D. alekperovi Snegovaya et Tahirova, 2015* +
106. D. brevicola Cash et Hopkinson, 1909 + +
107. D. amphoralis Hopkinson, 1909 + +
108. D. amphoralis cornuta Gauthier-Lièvre et Thomas, 1958 +
109. D. lucida Penard, 1890 + +
110. D. bicornis Penard, 1902 + + +
111. D. bryophila (Penard, 1902) + +
112. D. acutissima Deflandre, 1931 + +
113. D. acutisimella Chardez, 1985 + + +
114. D. smilion Thomas, 1953 +
115. D. longicollis (Gassowsky, 1936) + + +
116. D. decloitrei Godeanu, 1972 + +
117. D. baculosa Schonborn, 1966 +
118. D. pseudoclaviformis Snegovaya et Alekperov, 2010 +
119. D. rubescens Penard, 1902 +
120. D. oblonga v. angusticollis Stepanek, 1952 +
121. D. pysciformis Snegovaya et Alekperov, 2010 +
122. D. ventricosa Deflandre, 1926 + +
123. D. labiosa Wailes, 1919 + + +
124. D. pulex Penard, 1902 + +
125. D. varians Penard, 1902 + +
126. D. biconcava Ertl, 1964* + +
127. D. armatostoma Snegovaya et Alekperov, 2005 +
128. D. rotiferoformis Snegovaya et Alekperov, 2005 +
129. D. caucasica Snegovaya et Alekperov, 2005 +
130. D. vermiformis Snegovaya et Alekperov, 2005 +
131. D. bifurcata Snegovaya et Alekperov, 2005 +
132. D. azerbaijanica Snegovaya et Alekperov, 2005 +
133. D. petricola Cash, 1909* +
134. D. elongata Penard, 1905 +
135. D. avellana Penard, 1890 +
136. D. lenkoranica Snegovaya et Alekperov, 2010 +
137. D. crucistoma Snegovaya et Alekperov, 2009 +
138. D. immemorata Snegovaya et Alekperov, 2009 +
139. D. khachmazica Snegovaya et Alekperov, 2009 +
140. D. talyshica Snegovaya et Alekperov, 2010 +
141. D. girkanica Snegovaya et Alekperov, 2010 +
142. D. oblonga v. nodosa Leidy, 1879 +
143. D. guttula S. Godeanu, 1972 + +
144. D. ogdenii Snegovaya et Alekperov, 2005 +
145. D. echinulata Penard, 1911 +
146. D. hanaki Stëpânek, 1967 +
147. Pentagonia azerbaijanica Snegovaya et Alekperov, 2010 +
148. Pontigulasia compressoidea Jung, 1942 +
149. P. compressa (Carter, 1864) + + +
150. P. breviottis Snegovaya et Alekperov, 2005 +
Table 1. Continued Таблица 1. Продолжение
№ Species 1 2 3 4
151. P. bryophila Penard, 1902 + + + +
152. P. bigibbosa Penard, 1902 + + + +
153. P. spectabilis Penard, 1902 +
154. P elisa (Penard, 1893) +
155. Protocucurbitella danubialis Zivkovic, 197б +
15б. Cucurbitella mespiliformis v. africana Gauthier-Lièvre et Thomas, 19б0 +
157. Schwabia sphaerica Snegovaya et Alekperov, 2005 +
158. Pelecyamoeba stenostoma Snegovaya et Alekperov, 2005 +
159. Zivkovicia compressa (Carter, 18б4) Ogden, 1987 +
1б0. Armatodifflugia ceratophora Snegovaya, Alekperov, 2005 +
1б1. A.cuneata Snegovaya et Alekperov, 2005 +
Family Lesquereusidae Jung, 1942
1б2. Lesquereusia spiralis Schlumberger, 1849 + +
1б3. L. modesta Rhumbler, 1895 + + + +
1б4. L. gibbosa Thomas et Gauthier-Lièvre 1959 +
1б5. L. nabranica Snegovaya et Alekperov, 2009 +
1бб. L. contorta Snegovaya et Alekperov, 2009 +
1б7. L. azerbaijanica Snegovaya et Alekperov, 2009 +
1б8. L. macrolabiata Snegovaya et Alekperov, 2009 +
1б9. L. epistomium Penard, 1902 +
170. Quadrulella symmetrica (Wallich, 18б3) +
171. Fabalesquereusia graniformis Snegovaya et Alekperov, 2005 +
172. F. compressa Snegovaya et Alekperov, 2005 +
173. F. linearis Snegovaya et Alekperov, 2005 +
Family Cryptodifflugiidae Jung, 1942
174. Difflugiella apiculata Cash, 1904 +
175. Cryptodifflugia compressa Penard, 1902 +
17б. C. oviformis Penard, 1890 + +
Family Heleoperidae Jung, 1942
177. Heleopera petricola Leidy, 1879 +
178. Nebela collaris (Ehrenberg, 1848) +
179. N. penardiana Deflandre, 193б +
180. N. militaris Penard, 1890 +
181. N. galeata Penard, 1890 +
182. N. barbata Leidy, 1874 +
183. Awerintzewia minuta Snegovaya et Tahirova, 2018* +
Family Euglyphidae Wallich, 1864
184. Euglypha acanthophora (Ehrenberg, 1841) + +
185. E. tuberculata Dujardin, 1841 + +
18б. E. compressa Carter, 18б4 +
187. E. aspera Penard, 1899 +
188. E. laevis (Ehrenberg, 1832) +
189. E. rotunda Wailes, 1911 +
190. Assulina muscorum Greeff, 1888 +
191. A. scandinavica Penard, 1890 +
192. Placocista spinosa (Carter, 18б5) +
193. Tracheleuglypha dentata (Moniez, 1888) +
Table 1. Completion Таблица 1. Окончание
№ Species 1 2 3 4
Family Trinematidae Hoogenraad et Groot, 1940
194. Trinema enchelys (Ehrenberg, 1838) + +
195. T. penardi Thomas et Chardez, 1958 +
196. T. verrucosum France, 1914 +
197. T. complanatum Penard, 1890 +
198. Corythion dubium Taranek, 1881 +
Family Cyphoderiidae de Saedeleer, 1934
199. Cyphoderia ampula (Ehrenberg, 1840) + + + +
200. C. ampula papillata Wailes et Penard, 1911 +
201. C. ventricosa Chardez, 1991 +
202. C. trochus v. amphoralis Penard 1899 +
203. C. laevis Penard, 1902 +
Family Shamkiriidae Snegovaya et Alekperov, 2005
204. Shamkiriella convoluta Snegovaya et Alekperov, 2005 +
205. S. reticulata Snegovaya et Alekperov, 2005 +
206. S. phimatophora Snegovaya et Alekperov, 2005 +
207. S. turanica Snegovaya et Alekperov, 2009 +
208. Nabranella brevis Snegovaya et Alekperov, 2009 +
209. Bipseudostomatella bifurcata Snegovaya et Alekperov, 2005 +
210. B. gracilis Snegovaya et Alekperov, 2005 +
211. B. cornuta Snegovaya et Alekperov, 2005 +
212. Gomocollariella ranaformis Snegovaya et Alekperov, 2005 +
Family Phryganellidae Jung, 1942
213. Phryganella nidulus Penard, 1902 +
214. Ph.acropodia (Hertwig et Lesser, 1874) +
Family Pseudodifflugiidae De Saedeleer, 1934
215. Pseudodifflugia gracilis Schlumberger, 1849 + +
216. P. magna Snegovaya et Alekperov, 2010 +
217. Lenkorania microstoma (Playfair, 1918) +
Family Gromiidae Claparede et Lachmann, 1861
218. Gromia fluviatilis Dujardin, 1855 +
Total 126 72 60 110
Notes: 1 — south-eastern part of Azerbaijan, 2 — western regions of Azerbaijan, 3 — north-eastern of Azerbaijan, 4 — Absheron peninsula
* — new species for the Caucasus, ** — new species for the fauna of Azerbaijan (recorded in the Lankaran natural area)
out in the south-eastern regions of Azerbaijan, new testate amoebae species and subspecies have been recorded for the Caucasus and Azerbaijan fauna (Snegovaya, Tahirova 2015; Tahirova 2018) (Fig. 4).
To assess the similarities and differences between the fauna of testate amoebae of compared regions we used cluster analysis of Bray-Curtis similarity (Fig. 2).
From the resultant dendrograms it is evident (Fig. 2) that the highest degree of simi-
larity (56.17 %) is identified between the species composition of the Lankaran region and Northern Azerbaijan. When comparing the combined cluster of the species composition of the Lankaran region and north-eastern part of Azerbaijan with the species composition of the Absheron peninsula, the similarity of fauna reaches 52.98 %. The comparison of the testate amoebae species composition similarity between the combined clusters of the of the above-mentioned regions and Western
western paît of Azerbaijan
- Absheron peninsula
north-eastern part ~~ of Azerbaijan
- Lankaran natural area
0% similarity 50 Ю0
Fig. 2. Cluster analysis of faunistic similarity of testate amoebae of different regions of Azerbaijan (the results of Bray-Curtis analysis)
Рис. 2. Кластерный анализ фаунистического сходства раковинных амеб разных регионов Азербайджана (результаты анализа Брея — Кертиса)
Azerbaijan yields the lowest degree of similarity: 42.9 %.
To obtain more representative data, we compared the similarities between testate amoebae fauna of different regions of Azerbaijan using the Czekanowski index (Table 2). The results of this analysis have been consistent with the results of the cluster analysis.
When using this method, the greatest sim-
ilarity coefficient value is that of the Lankaran region and Northern Azerbaijan at 35.96 %. Slightly lower (33.82 %) similarity index was obtained when comparing testate amoebae species composition of the Lankaran region and the Absheron peninsula. For the fauna of Northern and Western Azerbaijan, the Cze-kanowski index was 30.15 %, while the similarity index between the fauna of northern
Table 2
Czekhanowsky similarity index of testate amoebae fauna of different regions of Azerbaijan (%)
Таблица 2
Индекс сходства Чехановского — Сёренсена фауны раковинных амеб различных
регионов Азербайджана (%)
Lankaran natural area North-eastern part of Azerbaijan (Khachmaz district) Western part of Azerbaijan (Goygol district) Absheron peninsula
Lankaran natural area 35.96 15.32 33.82
North-eastern part of Azerbaijan (Khachmaz district) 35.96 30.15 29.72
Western part of Azerbaijan (Goygol district) 15.32 30.15 24.59
Absheron peninsula 33.82 29.72 24.59
Lerik
Yardimli
Jalilabad
Masalli
Astara
Lankaran
0% similarity ^ 100
Fig. 3. Cluster analysis of the faunistic similarity of testate amoebae in different parts of South-Eastern Azerbaijan
Рис. 3. Кластерный анализ фаунистического сходства раковинных амеб в разных регионах юго-восточного Азербайджана
Azerbaijan and Absheron was 29.72 %. The testacean fauna of Western Azerbaijan and the Absheron peninsula were 24.59 % similar. The lowest similarity index was recorded between the testate amoebae fauna of the Lankaran region and Western Azerbaijan; it
was approximately 15.32 %.
In addition to comparing the fauna of testate amoebae of various investigated regions of Azerbaijan, we compared testate amoebae species composition of the studied areas with-
in the Lankaran natural area. The comparison is shown in figure 3. From the resultant dendrogram it is clear that Lerik and Yardimli districts are the most similar (65,6 %) in the species compositions of testaceans, out of all the studied regions of Lankaran natural area. The similarity between Jalilabad and Masalli districts reached 57.5 %. The similarity between the combined clusters of the above areas and the cluster of the species composition of the Astara region was for 56.3 %. And, finally, the
Table 3
The similarity index of testate amoebae fauna of different investigated regions of Lankaran
natural area (South-Eastern Azerbaijan) (%)
Таблица 3
Индекс сходства фауны раковинных амеб различных исследованных районов Ленкоранской природной области (юго-восток Азербайджана) (%)
Lankaran Astara Masalli Yardimli Jalilabad Lerik
Lankaran 29.15 30.1 30.69 29.0 29.15
Astara 29.15 34.78 31.07 36.07 35.71
Masalli 30.1 34.78 33.93 36.22 32.43
Yardimli 30.69 31.07 33.93 36.36 40.34
Jalilabad 29.0 36.07 36.22 36.36 34.0
Lerik 29.15 35.71 32.43 40.34 34.0
Fig. 4. Electron microphotos of new species and subspecies of testate amoebae for the fauna of Caucasus: 1 — Difflugia petricola Cash, 1909; 2 — D. microclaviformis Ogden, 1983; 3 — D. biconcava Ertl, 1964; 4 — D.corona ssp. tuberculata Vucetich, 1973; 5 — Arcella discoides ssp. scutelliformis Playfair, 1918
Рис. 4. Электронные микрофотографии новых для фауны Кавказа видов и подвидов раковинных амеб: 1 — Difflugia petricola Cash, 1909; 2 — D. microclaviformis Ogden, 1983; 3 — D. biconcava Ertl, 1964; 4 — D. corona ssp. tuberculata Vucetich, 1973; 5 — Arcella discoides ssp. scutelliformis Playfair, 1918
least similarity by species composition was recorded between the above-mentioned regions and the Lankaran region: 44.8 %.
The results of the comparison of testate amoebae species composition of different regions of Lankaran natural area according to the Czekanowski index are presented in Table 3.
Based on the obtained data, it follows that the highest similarity coefficient was observed
for the Lerik and Yardimli regions (40.34 % similarity); the lowest similarity was observed between the testaceans fauna of Jalilabad and Lankaran districts (29.0 % of similarity).
CONCLUSION
A comparison of species diversity of freshwater testate amoebae of South-Eastern Azerbaijan showed that their similarity varies
within 44.8 % and 65.6 %. The high level of similarity between the fauna of testate amoebae of the south-eastern and north-eastern parts of Azerbaijan is related to the similarity in geography and climate of both areas. Although
studies on freshwater testate amoebae fauna of different regions of Azerbaijan were conducted, there is a need for additional studies in the future for accurate comparison of testate amoebae fauna similarity.
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For citation: Tahirova, E. N., Snegovaya, N. Yu. (2020) A comparative analysis of freshwater testate amoebae species composition between the south-eastern part of Azerbaijan and other regions of Azerbaijan. Amurian Zoological Journal, vol. XII, no. 2, pp. 189-200. DOI: 10.33910/2686-9519-2020-12-2-189-200 Received 7 April 2020; reviewed 8 May 2020; accepted 19 May 2020.
Для цитирования: Тагирова, Э. Н., Снеговая, Н. Ю. (2020) Сравнительный анализ видового состава пресноводных раковинных амеб юго-восточной части Азербайджана с другими регионами страны. Амурский зоологический журнал, т. XII, № 2, с. 189-200. DOI: 10.33910/2686-9519-2020-12-2-189-200 Получена 7 апреля 2020; прошла рецензирование 8 мая 2020; принята 19 мая 2020.
