Diversity and distribution of diatoms in Bagmati River, Kathmandu, Nepal

Authors

  • Shiva Kumar Rai Post Graduate Campus Tribhuvan University, Biratnagar, Nepal
  • Sudip Khadka Post Graduate Campus Tribhuvan University, Biratnagar, Nepal

DOI:

https://doi.org/10.3126/hebids.v6i0.33527

Keywords:

Algae, Bacillariophyceae, epilithic, pashupati temple, seasonal variation

Abstract

Diversity and distribution of diatoms in different seasons from different localities and habitats of Bagmati River, Kathmandu was studied. Samples were collected as epilithic forms using a toothbrush, epipelic forms using a dropper, and epiphytic forms by squeezing aquatic macrophytes and were preserved in FAA solution. The dominant diatom taxa of Bagmati river were Achnanthes crenulata, Gomphonema pseudoaugur, Nitzschia linearis, N. palea, Pinnularia cf divergens and Surirella linearis. Out of 48 taxa reported, maximum taxa (87.5%) were found at Mulkharka site whereas taxa were minimum (39.58%) at Pashupati-Guheshwori site. The sizes of diatom cell, from largest to smallest, also followed the same pattern as above. Ten diatom taxa were common in all three sites. Seasonal and habitat diversity of diatom studied in Mulkharka site showed that the maximum number of taxa was reported during summer (92.85%) and least during winter (23.8%), and maximum taxa were found as epilithic (85.71%) followed by epipelic (38.09%) and epiphytic (33.33%).

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Author Biographies

Shiva Kumar Rai, Post Graduate Campus Tribhuvan University, Biratnagar, Nepal

Phycology Research Lab, Department of Botany

Sudip Khadka, Post Graduate Campus Tribhuvan University, Biratnagar, Nepal

Phycology Research Lab, Department of Botany

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Published

2018-12-02

How to Cite

Rai, S. K., & Khadka, S. (2018). Diversity and distribution of diatoms in Bagmati River, Kathmandu, Nepal. Himalayan Biodiversity, 6, 6–15. https://doi.org/10.3126/hebids.v6i0.33527

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Articles