Phytoplankton Distribution in an Oligotrophic Pond and a Eutrophic Pond

Abstract

Sumnmry: An oligotrophic pond and a eutrophic pond of Bhagalpur, India, were studied for phytoplankton distribution and to establish the relationship between this distribution and the physico-chemical properties of the water. Altogether, 114 algal taxa werc identified. I n R.ekabganj pond, diatoms constituted 54.4 0,; of tho algal spccies followed by green algae (29.4 blue greens (11.7and euglenoids (2.9In Ramna pond, blue greens were the most dominant comprising 35.7 O/,, of algal species followed by green algae (32.8 diatoms (18.5 Oi0) and euglcnoids (8.5 o/o). The members of Dinophyceae, Chrysophyceae and Xanthophyceae were poorly represented in both the water-bodies. Aphanizomenon flos-aquae, Microcystis aeruginosa, Chlorella vulgaris, Cladophora crispata, Volvox aurew and Euglena spp. were recorded only in Rarnna pond, indicating its higher nutrient status. Dinobryon calciforntis, many pennate diatoinis a n d desmids, indicators of oligotrophy, were observed in Bekabganj pond only.Measurements of water properties in the t,wo ponds showed t h a t transparency, dissolved oxygen and silicate were higher in Rekabgnnj pond than inRamna pond, while total alkalinit>y, hardness, total dissolved solids, dissolvod organic mat,ter. different cations, phosphate, nit.ra,t'e und chloride were lower in Rekabganj pond than in Ramna pond. Iritrodu ctionAlthough relationships between phytoplankton and eutrophication of 11atiiraI waters have been studied by many aquatic biologists in temperate regions of t h e world, IittIe is known about trnpical water-bodies. Secchi disc readings (CARLSON; CANF~ELD and HODGSO w), nitrogen concentration, nitrogen to phosphorus ratio (BAKER et al.), phosphorus (HICKMAN) and many other parameters have been used as possible indicators of eutrophication.The present investigation was undertaken t o determine the differences in phytoplankton composition and physico-chemical properties between a eutrophic (Ranilia) water-body arid an oligotrophic (Rekabganj) water-body. The area of Ramna pond is 20,286 rnz and the mean depth is 2.2 m, while the area of Rekabganj pond is 1,591 m2 and the mean depth is 2.9 m. Both the perennial ponds are located in the northeastern part of India on the south hank of river Ganges a t 87O02' east longitiide and 25O15' north latitude.

Taxonomy and distribution of desmids in Karapuzha Dam, Western Ghats, Kerala

“…Distribution in India: Bihar (Saha & Wujek, 1989, Das & Maurya, 2015); Orissa (Jena et al, 2008); Uttarakhand (Misra et al, 2008, Kumar et al, 2012); Maharashtra (Patil et al, 2012); Karnataka (Purushothama et al, 2011, Ramesha & Sophia, 2013); Bhopal (Bhat et al, 2015, Airsang & Lakshman, 2016); Tripura (Das et al, 2010); West Bengal (Bhosale et al, 2010, Das et al, 2015, Reddy & Chaturvedi, 2017); Jharkhand (Sharan & Sinha, 2010); Tamil Nadu (Suresh et al, 2012); Kerala (Nasser & Sureshkumar, 2014a); Rajasthan (Goyal, 2018).…”

“…Distribution in India: Uttar Pradesh (Prasad et al, 1987); Bihar (Saha & Wujek, 1989); Meghalaya (Kalita et al, 2015, Hajong & Papiya, 2018); Sikkim (Das & Keshri, 2012); Delhi (Chopra et al, 2017); Tamil Nadu (Radha & Uma Rani, 2018); West Bengal (Nandi et al, 2019); Maharashtra (Patil et al, 2012, Shahare & Cherian, 2012, Reddy & Chaturvedi, 2017, Ghule & Halwe, 2017).…”

“…Distribution in India: Andhra Pradesh (Venkateswarlu, 1986); Bihar (Saha & Wujek, 1989); Karnataka (Begum et al, 2010); Maharashtra (Anekar et al, 2012); Kerala (Krishnan, 2018); West Bengal (Nandi et al, 2019).…”

Note on the Occurrence of Two Species of <I>Volvox</I> (Volvocales, Chlorophyceae) from Jharkhand, India

“…Earlier records: Uttar Pradesh (Venkataraman, 1957, Lakshminarayana, 1962, Misra & al., 2008; Bihar (Saha & wujek, 1989); tamil Nadu (Anand, 1998); Uttarakhand (Gupta, 2005); Kerala (Maya & al., 2000); west Bengal (Sau & Gupta, 2005); Maharashtra (Deshmukh & Pingle, 2006).…”