The Biodiverse Rotifers (Rotifera: Eurotatoria) of Small Wetlands of the Brahmaputra River Floodplains of Lower and Upper Assam, Northeast India

Abstract

Rotifera assemblages of small floodplain wetlands (dobas or dubies) of lower and upper regions of the Brahmaputra river basin of Assam state of northeast India (NEI) reveal 157 species, belonging to 34 genera and 18 families, and highlight notable speciose constellation of up to 50 species/sample. One species, each is new to the Oriental region and Assam, and species of global and regional biogeographic interest form notable fractions. The biodiverse rotifer fauna and various interesting species are hypothesized to habitat diversity of the sampled dobas or dubies, impact of `the Assam-gateway’- an important biogeographic corridor of India, and location of the study area in the Indo-Burmese biodiversity hot-spot. Lecanidae and Lepadellidae are species-rich families, both of lower and upper Assam wetlands; upper Assam wetlands, in particular, are characterized by a distinct paucity of the Brachionidae and Brachionus spp., the relative paucity of Trichocerca, Keratella and Mytilina species, rare occurrence of Asplanchna and Filinia species, and lack of species of Conochilidae and Hexarthridae. Our results indicate the littoral-periphytic nature and tropical character of the rotifers. Overall, this study is an important contribution to Rotifera biodiversity of small lentic habitats of India, Asia and that of the tropics and subtropics.

Keywords

• biodiversity,dobas,dubies,interesting species,Rotifera paradox

References

1. Apaydın Yağcı M, Yeğen V, Yağcı A, Uysal R. 2017. A preliminary study on zooplankton species in different aquatic habitats of Anatolia (Turkey). Journal of Limnology and Freshwater Fisheries Research 3(1):45-50. doi:10.17216/LimnoFish.277465
2. Bonecker CC, Lansac-Tôha FA, Staub A. 1994. Qualitative study of Rotifers in different environments of the high Parana River floodplain (Ms), Brazil. Rev UNIMAR 16(1): 1-16.
3. Céréghino R, Biggs J, Oertli B, Declerck S. 2008. The ecology of European ponds: defining the characteristics of a neglected freshwater habitat. Hydrobiologia 597(1): 1-6. doi:10.1007/978-90-481-9088-1_1
4. Céréghino R, Boix D, Cauchie HM, Martens K, Oertli B. 2014. The ecological role of ponds in a changing world. Hydrobiologia 723(1):1-6. doi:10.1007/s10750-013-1719-y
5. EPCN, 2008. The European Pond Conservation Network. The Pond Manifesto. Available from: http://campus.hesge.ch/epcn/projects.asp.
6. Fernando CH. 1980. The freshwater zooplankton of Sri Lanka, with a discussion of tropical freshwater zooplankton composition. Internationale Revue der gesamten Hydrobiologie und Hydrographie 65(1): 411-426. doi:10.1002/iroh.19800650310
7. Fontaneto D, Márcia Barbosa A, Segers H, Pautasso M. 2012. The ‘rotiferologist’ effect and the other global correlates of species richness in rotifers. Ecography 35(2):174-182. doi:10.1111/j.1600-0587.2011. 06850.x
8. Green J. 2003. Associations of planktonic and periphytic rotifers in a tropical swamp, the Okavango Delta, Southern Africa. Hydrobiologia 490(1-3):197-209. doi:10.1023/A:1023475217987

9. Hutchinson GE. 1961. The paradox of the plankton. The American Naturalist 95(882):137-145. doi: 10.1086/282171
10. Jersabek CD, Leitner MF. 2013. The Rotifer World Catalog. World Wide Web electronic publication {17.07.2018}. http://www.rotifera.hausdernatur.at/accessed
11. José De Paggi S. 2001. Diversity of Rotifera (Monogononta) in wetlands of Rio Pilcomayo national park, Ramsar site (Formosa, Argentina). Hydrobiologia 462(1-3):25-34. doi:10.1023/A:1013157914860
12. Koste W. 1974. Zur Kenntnis der Rotatorien fauna der ‘schwimmenden Weise ‘einer Ufer lagune in der Varzea Amazoniens, Brasilien. Amazoniana 5(1): 25-59.
13. Koste W. 1978. Rotatoria. Die Rädertiere Mitteleuropas, begründet von Max Voigt. Überordnung Monogononta, Gebrüder Borntaeger, Berlin, Stuttgart. I. 673 pp U. II. Tafelbd. (T. 234).
14. Koste W, Robertson B. 1983. Taxonomic studies of the Rotifera (Phylum Aschelminthes) from a central Amazonian varzea lake, Lago Camaleao (Ilha de Marchantaria, Rio Solimoes, Amazonas, Brazil). Amazoniana 7(2):225-254.
15. Mani MS. 1974. Biogeographical evolution in India. In: Mani MS, editor Ecology and Biogeography in India. The Hague: Dr. W. Junk b.v. Publishers. p. 698-724.
16. Moss B, Kosten S, Meerhof M, Battarbee R, Jeppesen E, Mazzeo N, Havens K., Lacerot G, Liu Z, De Meester L, Paerl H, Scheffer M. 2011. Allied attack: climate change and eutrophication. Inland Waters 1(2):101-105. doi:10.5268/IW-1.2.359
17. Oertli B. 2018. Freshwater biodiversity conservation: The role of artificial ponds in the 21st century. Aquatic Conservation: Marine and Freshwater Ecosystems 28(2):264-269. doi:10.1002/aqc.2902.
18. Oertli B, Biggs J, Cereghino R, Declerck S, Hull A., Miracle MR. (Eds.). 2010. Pond Conservation in Europe. Dordrecht, the Netherlands: Springer. doi:10.1007/978-90-481-9088-1
19. Ranga Reddy Y. 2013. Neodiaptomus prateek n. sp., a new freshwater copepod from Assam, India, with critical review of generic assignment of Neodiaptomus spp. and a note on diaptomid species richness (Calanoida: Diaptomidae). Journal of Crustacean Biology 33(6):849-865. doi:10.1163/1937240X-00002195
20. Segers H. 1995. Rotifera 2: Lecanidae. In: Dumont HJ, Nogrady T, editors Guides to identification of the microinvertebrates of the continental waters of the world. Amsterdam, the Netherlands: SPB Academic Publishing.6 p. 1-226.
21. Segers H. 2007. Annotated checklist of the rotifers (Phylum Rotifera), with notes on nomenclature, taxonomy and distribution. Zootaxa 1564(1): 1-104. doi:10.11646/zootaxa.1564.1.1
22. Segers H. 2008. Global diversity of rotifers (Rotifera) in freshwater. Hydrobiologia 595:49–59. doi: 10.1007/s10750-007-9003-7
23. Segers H, Chittapun S. 2001. The interstitial Rotifera of a tropical freshwater peat swamp on Phuket Island, Thailand. Belgian Journal of Zoology 131(2): 25-31
24. Segers H, Nwadiaro CS, Dumont HJ. 1993. Rotifera of some lakes in the floodplain of the river Niger (Imo State, Nigeria). II. Faunal composition and diversity. Hydrobiologia 250: 39-61. doi:10.1007/BF00007494
25. Segers H, Pholpunthin P. 1997. New and rare Rotifera from Rivers for Life Thale Noi Lake, Pattalang Province, Thailand, with a note on the taxonomy of Cephalodella (Notommatidae). Annales de Limnologie 33:13-21. doi:10.1051/limn/1997001
26. Sharma BK 1998. Freshwater Rotifers (Rotifera: Eurotatoria). Fauna of West Bengal, State Fauna Series 3(11): 341-361. Zoological Survey of India, Calcutta.
27. Sharma BK. 2014. Rotifers (Rotifera: Eurotatoria) from wetlands of Majuli – the largest river island, the Brahmaputra river basin of upper Assam, northeast India. Check List 10(2): 292-298. doi:10.15560/10.2.292
28. Sharma BK, Kensibo. 2017. Rotifer assemblages (Rotifera: Eurotatoria) of two wetlands of Nagaland, northeast India: ecosystem diversity and interesting features. International Journal of Fisheries and Aquatic Studies 5(2): 609-617.
29. Sharma, BK, Kensibo and Sharma S. 2017. Biodiversity of rotifers (Rotifera: Eurotatoria) of Nagaland, northeast India; richness, composition and ecosystem diversity. International Journal of Fisheries and Aquatic Studies 5(5):180-187.
30. Sharma BK, Sharma S. 1999. Freshwater Rotifers (Rotifera: Eurotatoria). Fauna of Meghalaya: State Fauna Series 4(9):11-161 Zoological Survey of India, Calcutta.
31. Sharma BK, Sharma S 2000. Freshwater Rotifers (Rotifera: Eurotatoria). Fauna of Tripura: State Fauna Series 7(4): 162-224. Zoological Survey of India, Calcutta.
32. Sharma BK, Sharma S. 2014. Northeast India: An important region with a rich biodiversity of Rotifera. In: Sharma BK, Dumont HJ, Wallace RL (eds.) Rotifera XIII: Rotifer Biology – A structural and functional Approach. International Review of Hydrobiology 99(1–2): 20-37. doi:10.1002/iroh.201301701
33. Sharma BK, Sharma S. 2015a. Biodiversity of freshwater rotifers (Rotifera: Eurotatoria) of Mizoram, Northeast India: composition, new records and interesting features. International Journal of Aquatic Biology 3(5): 301-313.
34. Sharma BK, Sharma S. 2015b. The diversity and distribution of Lepadellidae (Rotifera: Eurotatoria: Monogononta) of India. International Review of Hydrobiology 100 (1): 34-42. doi: 10.1002/iroh.201401739
35. Sharma BK, Sharma S. 2017. Rotifera: Eurotatoria (Rotifers). In: Chandra K, Gopi KC, Rao DV, Valarmathi K, Alfred JRB, editors Current status of freshwater faunal diversity in India. p. 93-113.Zoological Survey of India, Kolkata.
36. Sharma BK, Sharma S. 2018. The rotifers (Rotifera: Eurotatoria) from the Kashmir Himalayan floodplains and Rotifera biodiversity of Jammu & Kashmir, north India. International Journal of Aquatic Biology 6(4): 208-220. doi:10.22034/ijab.v6i4.507
37. Sharma BK, Sharma S. 2019a. The biodiverse rotifer assemblages (Rotifera: Eurotatoria) of Arunachal Pradesh, the eastern Himalayas: alpha diversity, distribution and interesting features. Bonn zoological Bulletin 68(1):1-12. doi:10.20363/BZB-2019.68.1.001
38. Sharma BK, Sharma S. 2019b. The biodiverse rotifers (Rotifera: Eurotatoria) of the floodplain wetlands of Barak valley of Assam state, northeast India. Opuscula Zoologica, Budapest 50(1):3-15. doi:10.18348/opzool.2019.1.3
39. Sharma S, Sharma BK. 2008. Zooplankton diversity in floodplain lakes of Assam. Records of the Zoological Survey of India, Occasional Paper No: 290: 1-307.
40. Sørensen T. 1948. A method of establishing group of equal amplitude in plant sociology based on similarity of species content and its application to analyse the vegetation of Danish Commons. Kongelige Danske Videnskabernes Selskab, Biologiske Skrifter 5(4): 1-34.
41. Tuna A, Ustaoğlu MR. 2016. The Zooplankton Fauna of Kemer Dam Lake (Aydın-Turkey). Journal of Limnology and Freshwater Fisheries Research 2(2):95-106. doi: 10.17216/LimnoFish-5000183782
42. Vad CF, Péntek A, Cozma NJ, Földi A, Tóth A, Tóth B, Böde NA, Móra A, Ptacnik R, Ács E, Zsuga K, Horvátha Z. 2017. Wartime scars or reservoirs of biodiversity? The value of bomb crater ponds in aquatic conservation. Biological Conservation 209: 253–262. doi:10.1016/j.biocon.2017.02.025