1.
SURVEY AND SCREENING OF
MICRO ALGAE FROM FRESH
WATER BODIES
BY,
M.LOGESWARI
S.NARTHANAA
G.LOGESH
M.RUBAVATHIGOKILA

2.
INTRODUCTION
• Microalgae are often called “Phytoplankton”.
• Play a vital role in our ecosystem
• Primary producers in both freshwater and
marine systems
• Major O2 producer
• Fix Nitrogen from the atmosphere
• Purify water.
• They are the valuable indicators of environmental
quality.
• The study of algae is known as ‘Phycology’

3.
AIM AND OBJECTIVES
Aim:
• The present study was aimed to collect the micro algae from the
water bodies and to identify the micro algal species to make a
record on its diversity and compare them with the water
parameters evaluated from the sampling sites.
Objective:
• To identify algae with the help of morphological studies
• To understand the differences between micro and macro algae
• To know about primary producers.
• To study their biological utilization
• To understand the diversity of algae in water bodies
• To know about the ecological parameter of water bodies.
•

4.
Materials and Methods
Collection of samples:
• Samples were collected in 8 different areas in
different locations in the month of November
2018-December 2018).Algal samples were
collected in a sterile 300ml plastic water
bottles.

5.
COLLECTION SITES:
• Coimbatore big lake
• Selva Chinthamani lake
• Valangulam lake
• Kurchi lake
• Garden pond
• Walayar dam
• M.C.palli pond
• Kurusadi hills pond

6.
ISOLATION
SERIAL DILUTION:
• In this method ,mainly 5 dilution steps (the
inocula corresponding to 1,10-1,10-2,10-3,10-4 )
are involved for isolation of the required
species.(C.P.Gopinanth-Life feed Culture –
Micro algae).

7.
WATER PARAMETERS
Water samples from each sampling site were
also collected to study the water parameters
such as pH and temperature.
pH Temperature
7.5 30-330c
7.5-9.0 28-300c
9.0 28-300c
7.0-8.0 30-350c
7.5-8.0 26-280c
7.5-8.0 30-360c
7.0-8.0 30-330c
7.5-8.5 28-300c

8.
Identification
• The identification of algal species was done
with the help of standard books and
monographs (Fritsch, 1935; Desikachary, 1985
and Philipose, 1967). Internet resources were
also used for identification.
• the identified photographs and the table are
described in the upcoming charts

9.
S.n
o
Class Family Name of the
species
1. Cyanophyceae Aphanizomenonace
ae
Aphanizomenon sp
Oscillatoriaceae Lyngbya birgei
Oscillatoria limosa
Oscillatoria
princeps
Nostacaceae Nostoc humifusum
Phormidiaceae Arthospira
platensis
Chroococcaceae Chroococcus sp

10.
2. Chlorophycea
e
Chlorellaceae Chlorella vulgaris
Closteriaceae Closterium dianae
Closterium
leibleinii
Desmidiaceae Cosmarium
meneghinii
Cosmarium
bituberculatum
Radiococcaceae Radiococcus
nimbatus
Scenedesmaceae Senedesmus
ornatus
Senedesmus
obliquits
Senedesmus
parisiensis

11.
Senedesmus dimorpus
Senedesmus bijuga
Senedesmus
quadricauda
Senedesmus
acuminatus
Senedesmus
incrassatulus
Westella botryoides
Pithophoraceae Pithophora sp
Selenastraceae Ankistrodesmus
falcatus
Odegoniaceae Oedogonium capillare

12.
Chlamydomonadacea
e
Chlamydomonas sp.
Zygnemataceae Spirogyra longata
Spirogyra sp.
Zygnema sp.
Chlorococcaceae Chlorococcum sp.
3. Bacillariophycea
e
Bacillariaceae Bacillaria paradoxa
Nitzschia sp
Nitzschia sigma
Nitzschia intermedia
Nitzschia amphibia
Nitzschia linearis
Pleuro sigma

13.
Cymbellaceae Cymbella sp
Gomphonemataceae Gomphonema
laticollum
Catenulaceae Amphora proteus
Stephanodiscaceae Stenopterobia
delicatissima
Cyclotella glomerata
Naviculaceae Navicula cuspidata
Navicula tripunctata
Navicula sp.
Mastogloiaceae Mastogloia smithii
Achnanthaceae Achnanthes
coarctata
Achnanthidium sp.
Fragilariaceae Fragilaria gracilis
Gomphonemataceae Gomphonema affine

14.
Cyanophyceae

15.
Chlorophyceae

16.
Bacillariophyceae

17.
Class
Number of
families
Number of Genera and
species
Cyanophyceae 5 6 genera and 7 species
Chlorophyceae 11 13 genera and 23 sp.
Bacillariophyceae 10 14 genera and 20 sp.

18.
RESULT
• In the 8 samples pH and temperature
was recorded. A total number of 70
species of micro algae were recorded.
Out of 70, 50 species were identified
and others are yet to be identified.
•

19.
The overall percentage of algal
diversity of the study area
14%
46%
40%
Algal diversity of study area
Cyanophyceae
Cholorophyceae
Bacillariophyceae

20.
The present study reported that
the class Chlorophyceae members
are more dominant till now, others
are yet to be identified.